Explain install_and_run Installation

Remove unused svgo-client files while keeping bin/svgo-client/svgo.cmd runtime behavior intact.

Drop node_modules/.bin wrappers, TypeScript declaration files (*.d.ts), and obsolete svgo-cli.js wrapper script.

Co-Authored-By: Abacus.AI CLI <agent@abacus.ai>

.gitignore

@@ -1,4 +1,8 @@
 python-3.*-embed-amd64.zip
 python-embed/*
 .vscode/launch.json
-logs/*.log
+logs/*.log
+__pycache__/*
+.coverage
+build/*
+dist/*

.vscode/settings.json

@@ -0,0 +1,11 @@
+{
+    "python.testing.unittestArgs": [
+        "-v",
+        "-s",
+        ".",
+        "-p",
+        "test_*.py"
+    ],
+    "python.testing.pytestEnabled": false,
+    "python.testing.unittestEnabled": true
+}

README.md

@@ -1,6 +1,5 @@
-
+# PPTX Image Compressor (CaesiumCLT + svg-polish)
-# PPTX Image Compressor (CaesiumCLT only)
+**Version 1.1.9**
-**Version 1.1.3**
 
 Dieses Paket enthält:
 
@@ -11,8 +10,6 @@ PPTX-Image-Compressor/
 ├─ pptx_image_compress.py
 ├─ bin/
 │  └─ caesiumclt.exe
-└─ samples/
-   └─ README.txt
 ```
 
 ## Schnellstart (ohne Admin-Rechte)
@@ -29,20 +26,29 @@ install_and_run.bat --input-dir "C:\Slides" --recursive -O "C:\Slides\out" -q 80
 ```
 
 Die Batch lädt bei Bedarf automatisch das **Windows Embeddable Python Package**, entpackt es lokal und führt das Tool aus.
+Zusätzlich wird **pip** installiert, damit das **svg-polish** Modul installiert werden kann. 
+
 
 ## Was das Tool macht
 - Entpackt die PPTX in einen Temp‑Ordner
-- Komprimiert **JPG/JPEG, PNG, WebP** mit **CaesiumCLT** (Default `-q 90`, `-O bigger`)
+- Komprimiert **JPG/JPEG, PNG, WebP, GIF** mit **CaesiumCLT** (Default `-q 90`, `-O bigger`)
+- Komprimiert **SVG** mit **svg-polish** (Default-Modus: `balanced`)
 - Ersetzt Bilder nur, wenn die komprimierte Datei kleiner ist
+- Versucht bei PNG zusätzlich einen PNG->JPG Wechsel, wenn das Bild nach Kompression noch größer als 500 KB ist
+- Ersetzt Bilder nur, wenn sei mindestens 2% kleiner sind (verhindert *doppelte Komprimierung*)
 - Schreibt ein CSV‑Log (`.log` neben der Output‑PPTX)
 - Baut eine neue PPTX und zeigt eine Summary (Name, Größe vorher/nachher, Ersparnis %, Zeit)
-- Räumt alle temporären Dateien auf (keine Caesium‑Tempfiles in der finalen PPTX)
+
+## Änderungen in 1.1.9
+- SVG Files Default Profile: `balanced` statt `aggressive`
+- Datei-Eigenschaften der neu generierten PPTX enthält Hinweis auf Compression `compressed by PPTX Image Compressor` 
 
 ## Hinweise
-- **GIF** wird übersprungen (keine Rekodierung).
 - `-t` steuert die Parallelität der Python‑Threads; intern wird `caesiumclt --threads 1` gesetzt, sobald `-t > 1`, um Oversubscription zu vermeiden. Default ist 16
 -  `-q` steuert das Qualitätslevel; intern wird `caesiumclt -q` mit diesem Wert von `0..100` benutzt, Default ist 90
+-  `--min-savings` steuert das Mindestmass an Komprimierung zur Verhinderung von doppelter Komprimierunt, Default ist 2%
 - Die Batch **verwendet bevorzugt das Embeddable Python** neben der BAT; ansonsten sucht sie echte `python.exe`/`py.exe` im PATH, **ignoriert** aber die Microsoft‑Store‑Alias‑Pfade (`WindowsApps`).
+- `--svg-profile` steuert das Vector-Optimierungsprofil `balanced|aggressive`
 
 ## Manuelle Nutzung des .py (falls Python vorhanden)
 ```bat
@@ -51,4 +57,5 @@ python pptx_image_compress.py -i "C:\Pfad\input.pptx" -t 8
 
 ## Quellen & Tools
 - CaesiumCLT – Projekt/Downloads: https://github.com/Lymphatus/caesium-clt
+- SVG Polish - https://github.com/g-battaglia/svg_polish
 - Windows Embeddable Python Package – Doku/Downloads: https://docs.python.org/3/using/windows.html

build.bat

@@ -0,0 +1,124 @@
+@echo off
+setlocal EnableExtensions
+
+set "SELF_DIR=%~dp0"
+pushd "%SELF_DIR%"
+
+set "BUILD_DIR=%SELF_DIR%dist"
+set "SPEC_DIR=%SELF_DIR%build"
+set "PY_CMD=%SELF_DIR%.venv\Scripts\python.exe"
+set "UPX_DIR=%SELF_DIR%buildtools"
+
+set "MINIFY="
+if /I "%~1"=="--minify" set "MINIFY=1"
+
+echo [INFO] Build started...
+
+rem =========================
+rem Check Python
+rem =========================
+
+if not exist "%PY_CMD%" (
+    echo [ERROR] Python not found
+    exit /b 1
+)
+
+rem =========================
+rem Check PyInstaller
+rem =========================
+
+"%PY_CMD%" -m pip show pyinstaller >nul 2>&1
+if errorlevel 1 (
+    echo [INFO] Installing PyInstaller...
+    "%PY_CMD%" -m pip install pyinstaller --quiet
+)
+
+rem =========================
+rem Clean
+rem =========================
+
+if exist "%BUILD_DIR%" rmdir /s /q "%BUILD_DIR%"
+if exist "%SPEC_DIR%" rmdir /s /q "%SPEC_DIR%"
+
+rem =========================
+rem Optional icon
+rem =========================
+
+set "ICON_ARG="
+if exist "%SELF_DIR%pptx-image-compress.ico" (
+    set "ICON_ARG=%SELF_DIR%pptx-image-compress.ico"
+)
+echo [INFO] Icon param: %ICON_ARG%
+
+
+rem =========================
+rem Build EXE (STABLE)
+rem =========================
+
+echo [INFO] Building EXE...
+
+if defined ICON_ARG (
+    "%PY_CMD%" -m PyInstaller ^
+        --onefile ^
+        --console ^
+        --name pptx-image-compress ^
+        --distpath "%BUILD_DIR%" ^
+        --specpath "%SPEC_DIR%" ^
+        --workpath "%SPEC_DIR%\build" ^
+        --icon="%ICON_ARG%" ^
+        --hidden-import svg_polish ^
+        pptx_image_compress.py
+) else (
+    "%PY_CMD%" -m PyInstaller ^
+        --onefile ^
+        --console ^
+        --name pptx-image-compress ^
+        --distpath "%BUILD_DIR%" ^
+        --specpath "%SPEC_DIR%" ^
+        --workpath "%SPEC_DIR%\build" ^
+        --hidden-import svg_polish ^
+        pptx_image_compress.py
+)
+
+if errorlevel 1 (
+    echo [ERROR] Build failed
+    exit /b 1
+)
+
+rem =========================
+rem Optional UPX
+rem =========================
+
+if defined MINIFY (
+    if exist "%UPX_DIR%\upx.exe" (
+        echo [INFO] Running UPX compression...
+        "%UPX_DIR%\upx.exe" --best --force "%BUILD_DIR%\pptx-image-compress.exe"
+    ) else (
+        echo [WARN] UPX not found at %UPX_DIR%
+    )
+)
+
+rem =========================
+rem Copy templates
+rem =========================
+
+copy "%SELF_DIR%templates\run.tpl.bat" "%BUILD_DIR%\run.bat" >nul
+copy "%SELF_DIR%templates\dragdrop.tpl.bat" "%BUILD_DIR%\dragdrop.bat" >nul
+
+
+rem =========================
+rem Copy caesiumclt.exe
+rem =========================
+copy "%SELF_DIR%bin\caesiumclt.exe" "%BUILD_DIR%\caesiumclt.exe"
+
+rem =========================
+rem Done
+rem =========================
+
+echo(
+echo [SUCCESS] Build complete!
+echo Output:
+echo   %BUILD_DIR%\pptx-image-compress.exe
+
+popd
+endlocal

check_new_version.bat

@@ -0,0 +1,24 @@
+@echo off
+setlocal EnableExtensions EnableDelayedExpansion
+
+set TMP_OUT=%TEMP%\update_check_%RANDOM%.txt
+
+python check_new_version.py > "%TMP_OUT%"
+set EXITCODE=%ERRORLEVEL%
+
+if %EXITCODE%==20 (
+    echo Fehler beim Update-Check
+    goto :END
+)
+
+if %EXITCODE%==0 (
+    echo Keine Updates verfuegbar.
+    goto :END
+)
+
+echo.
+type "%TMP_OUT%"
+
+:END
+del "%TMP_OUT%" >nul 2>&1
+endlocal

check_new_version.ini

@@ -0,0 +1,6 @@
+[DEFAULT]
+python_used_version = 3.14.6
+python_latest_version = 3.14.6
+caesiumclt_used_version = v1.3.0
+caesiumclt_latest_version = v1.3.0
+

check_new_version.py

@@ -0,0 +1,122 @@
+import argparse
+import configparser
+import json
+import sys
+import os
+import urllib.request
+from pathlib import Path
+
+INI_FILE = Path("check_new_version.ini")
+PYTHON_API = "https://endoflife.date/api/v1/products/python"
+CAESIUM_API = "https://api.github.com/repos/Lymphatus/caesium-clt/tags"
+
+EXIT_NO_UPDATE = 0
+EXIT_UPDATE_AVAILABLE = 10
+EXIT_ERROR = 20
+
+
+def fetch_json(url):
+    with urllib.request.urlopen(url, timeout=15) as r:
+        return json.loads(r.read().decode("utf-8"))
+
+
+def load_ini():
+    cfg = configparser.ConfigParser()
+    cfg.read(INI_FILE, encoding="utf-8")
+    return cfg
+
+
+def save_ini(cfg):
+    with open(INI_FILE, "w", encoding="utf-8") as f:
+        cfg.write(f)
+
+
+def check_python(cfg, result):
+    used = cfg["DEFAULT"].get("python_used_version", "").strip()
+    major_minor = ".".join(used.split(".")[:2])
+
+    data = fetch_json(PYTHON_API)
+    releases = data.get("result", {}).get("releases", [])
+
+    for rel in releases:
+        if rel.get("name") != major_minor:
+            continue
+
+        latest = rel.get("latest", {}).get("name", "")
+        is_maintained = rel.get("isMaintained", True)
+
+        cfg["DEFAULT"]["python_latest_version"] = latest
+
+        if used != latest:
+            result["updates"].append({
+                "tool": "python",
+                "used": used,
+                "latest": latest,
+                "maintained": is_maintained,
+                "url": (
+                    f"https://www.python.org/ftp/python/{latest}/"
+                    f"python-{latest}-embed-amd64.zip"
+                )
+            })
+
+
+def check_caesium(cfg, result):
+    used = cfg["DEFAULT"].get("caesiumclt_used_version", "").strip()
+
+    tags = fetch_json(CAESIUM_API)
+    latest = tags[0]["name"]
+
+    cfg["DEFAULT"]["caesiumclt_latest_version"] = latest
+
+    if used != latest:
+        result["updates"].append({
+            "tool": "caesiumclt",
+            "used": used,
+            "latest": latest,
+            "maintained": True,
+            "url": (
+                f"https://github.com/Lymphatus/caesium-clt/releases/download/{latest}/"
+                f"caesiumclt-{latest}-x86_64-pc-windows-msvc.zip"
+            )
+        })
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--yes", action="store_true")
+    parser.add_argument("--json", action="store_true")
+    args = parser.parse_args()
+
+    cfg = load_ini()
+    result = {"updates": []}
+
+    try:
+        check_python(cfg, result)
+        check_caesium(cfg, result)
+    except Exception as e:
+        print(f"ERROR: {e}")
+        sys.exit(EXIT_ERROR)
+
+    save_ini(cfg)
+
+    if args.json:
+        print(json.dumps(result, indent=2))
+    else:
+        for u in result["updates"]:
+            print(
+                f"{u['tool'].capitalize()}: aktuell genutzt {u['used']}, "
+                f"neu {u['latest']}"
+            )
+            print(f"{u['tool'].upper()}_DOWNLOAD={u['url']}")
+            print(f"{u['tool'].upper()}_LATEST_VERSION={u['latest']}")
+            
+            if not u["maintained"]:
+                print(
+                    f"WARNING: Achtung Version {u['latest']} "
+                    "wird nicht mehr gewartet!"
+                )
+
+    sys.exit(EXIT_UPDATE_AVAILABLE if result["updates"] else EXIT_NO_UPDATE)
+
+
+if __name__ == "__main__":
+    main()

endoflifeapi.json

@@ -0,0 +1,655 @@
+{
+    "schema_version": "1.2.0",
+    "generated_at": "2026-04-08T07:17:19+00:00",
+    "last_modified": "2026-04-08T00:10:16+00:00",
+    "result": {
+        "name": "python",
+        "aliases": [],
+        "label": "Python",
+        "category": "lang",
+        "tags": [
+            "lang"
+        ],
+        "versionCommand": "python --version\n\n# or alternatively\npython3 --version",
+        "identifiers": [
+            {
+                "type": "purl",
+                "id": "pkg:generic/python"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python3.14"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python3.13"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python3.12"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python3.11"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python3.10"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python3.9"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python3.8"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python3.7"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python3.6"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python3.5"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python3.4"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python3.3"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python3.2"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python3.1"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python3.0"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python2.7"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python2.6"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python2.5"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python2.4"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python2.3"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python2.2"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/ubuntu/python2.1"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python3.14"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python3.13"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python3.11"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python3.9"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python3.7"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python3.5"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python3.4"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python3.2"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python3.1"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python2.7"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python2.6"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python2.5"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python2.4"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python2.3"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python2.2"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python2.1"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:deb/debian/python1.5"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/fedora/python3.14"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/fedora/python3.13"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/fedora/python3.12"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/fedora/python3.11"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/fedora/python3.10"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/fedora/python3.9"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/fedora/python3.8"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/fedora/python3.6"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/fedora/python3.5"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/amzn/python"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/amzn/python2"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/amzn/python3"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/redhat/python"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/redhat/python2"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/redhat/python3"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/centos/python"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/centos/python2"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:rpm/centos/python3"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:docker/library/python"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:docker/circleci/python"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:docker/bitnami/python"
+            },
+            {
+                "type": "purl",
+                "id": "pkg:github/python/cpython"
+            },
+            {
+                "type": "repology",
+                "id": "python"
+            },
+            {
+                "type": "cpe",
+                "id": "cpe:/a:python:python"
+            },
+            {
+                "type": "cpe",
+                "id": "cpe:2.3:a:python:python"
+            }
+        ],
+        "labels": {
+            "eoas": "Active Support",
+            "discontinued": null,
+            "eol": "Security Support",
+            "eoes": null
+        },
+        "links": {
+            "icon": "https://cdn.jsdelivr.net/npm/simple-icons/icons/python.svg",
+            "html": "https://endoflife.date/python",
+            "releasePolicy": "https://devguide.python.org/versions/"
+        },
+        "releases": [
+            {
+                "name": "3.14",
+                "codename": null,
+                "label": "3.14",
+                "releaseDate": "2025-10-07",
+                "isLts": false,
+                "ltsFrom": null,
+                "isEoas": false,
+                "eoasFrom": "2027-10-01",
+                "isEol": false,
+                "eolFrom": "2030-10-31",
+                "isMaintained": true,
+                "latest": {
+                    "name": "3.14.4",
+                    "date": "2026-04-07",
+                    "link": "https://www.python.org/downloads/release/python-3144/"
+                },
+                "custom": {
+                    "pep": "PEP-0745"
+                }
+            },
+            {
+                "name": "3.13",
+                "codename": null,
+                "label": "3.13",
+                "releaseDate": "2024-10-07",
+                "isLts": false,
+                "ltsFrom": null,
+                "isEoas": false,
+                "eoasFrom": "2026-10-01",
+                "isEol": false,
+                "eolFrom": "2029-10-31",
+                "isMaintained": true,
+                "latest": {
+                    "name": "3.13.13",
+                    "date": "2026-04-07",
+                    "link": "https://www.python.org/downloads/release/python-31313/"
+                },
+                "custom": {
+                    "pep": "PEP-0719"
+                }
+            },
+            {
+                "name": "3.12",
+                "codename": null,
+                "label": "3.12",
+                "releaseDate": "2023-10-02",
+                "isLts": false,
+                "ltsFrom": null,
+                "isEoas": true,
+                "eoasFrom": "2025-04-02",
+                "isEol": false,
+                "eolFrom": "2028-10-31",
+                "isMaintained": true,
+                "latest": {
+                    "name": "3.12.13",
+                    "date": "2026-03-03",
+                    "link": "https://www.python.org/downloads/release/python-31213/"
+                },
+                "custom": {
+                    "pep": "PEP-0693"
+                }
+            },
+            {
+                "name": "3.11",
+                "codename": null,
+                "label": "3.11",
+                "releaseDate": "2022-10-24",
+                "isLts": false,
+                "ltsFrom": null,
+                "isEoas": true,
+                "eoasFrom": "2024-04-01",
+                "isEol": false,
+                "eolFrom": "2027-10-31",
+                "isMaintained": true,
+                "latest": {
+                    "name": "3.11.15",
+                    "date": "2026-03-03",
+                    "link": "https://www.python.org/downloads/release/python-31115/"
+                },
+                "custom": {
+                    "pep": "PEP-0664"
+                }
+            },
+            {
+                "name": "3.10",
+                "codename": null,
+                "label": "3.10",
+                "releaseDate": "2021-10-04",
+                "isLts": false,
+                "ltsFrom": null,
+                "isEoas": true,
+                "eoasFrom": "2023-04-05",
+                "isEol": false,
+                "eolFrom": "2026-10-31",
+                "isMaintained": true,
+                "latest": {
+                    "name": "3.10.20",
+                    "date": "2026-03-03",
+                    "link": "https://www.python.org/downloads/release/python-31020/"
+                },
+                "custom": {
+                    "pep": "PEP-0619"
+                }
+            },
+            {
+                "name": "3.9",
+                "codename": null,
+                "label": "3.9",
+                "releaseDate": "2020-10-05",
+                "isLts": false,
+                "ltsFrom": null,
+                "isEoas": true,
+                "eoasFrom": "2022-05-17",
+                "isEol": true,
+                "eolFrom": "2025-10-31",
+                "isMaintained": false,
+                "latest": {
+                    "name": "3.9.25",
+                    "date": "2025-10-31",
+                    "link": "https://www.python.org/downloads/release/python-3925/"
+                },
+                "custom": {
+                    "pep": "PEP-0596"
+                }
+            },
+            {
+                "name": "3.8",
+                "codename": null,
+                "label": "3.8",
+                "releaseDate": "2019-10-14",
+                "isLts": false,
+                "ltsFrom": null,
+                "isEoas": true,
+                "eoasFrom": "2021-05-03",
+                "isEol": true,
+                "eolFrom": "2024-10-07",
+                "isMaintained": false,
+                "latest": {
+                    "name": "3.8.20",
+                    "date": "2024-09-06",
+                    "link": "https://www.python.org/downloads/release/python-3820/"
+                },
+                "custom": {
+                    "pep": "PEP-0569"
+                }
+            },
+            {
+                "name": "3.7",
+                "codename": null,
+                "label": "3.7",
+                "releaseDate": "2018-06-27",
+                "isLts": false,
+                "ltsFrom": null,
+                "isEoas": true,
+                "eoasFrom": "2020-06-27",
+                "isEol": true,
+                "eolFrom": "2023-06-27",
+                "isMaintained": false,
+                "latest": {
+                    "name": "3.7.17",
+                    "date": "2023-06-05",
+                    "link": "https://www.python.org/downloads/release/python-3717/"
+                },
+                "custom": {
+                    "pep": "PEP-0537"
+                }
+            },
+            {
+                "name": "3.6",
+                "codename": null,
+                "label": "3.6",
+                "releaseDate": "2016-12-23",
+                "isLts": false,
+                "ltsFrom": null,
+                "isEoas": true,
+                "eoasFrom": "2018-12-24",
+                "isEol": true,
+                "eolFrom": "2021-12-23",
+                "isMaintained": false,
+                "latest": {
+                    "name": "3.6.15",
+                    "date": "2021-09-03",
+                    "link": "https://www.python.org/downloads/release/python-3615/"
+                },
+                "custom": {
+                    "pep": "PEP-0494"
+                }
+            },
+            {
+                "name": "3.5",
+                "codename": null,
+                "label": "3.5",
+                "releaseDate": "2015-09-13",
+                "isLts": false,
+                "ltsFrom": null,
+                "isEoas": true,
+                "eoasFrom": null,
+                "isEol": true,
+                "eolFrom": "2020-09-30",
+                "isMaintained": false,
+                "latest": {
+                    "name": "3.5.10",
+                    "date": "2020-09-05",
+                    "link": "https://www.python.org/downloads/release/python-3510/"
+                },
+                "custom": {
+                    "pep": "PEP-0478"
+                }
+            },
+            {
+                "name": "3.4",
+                "codename": null,
+                "label": "3.4",
+                "releaseDate": "2014-03-16",
+                "isLts": false,
+                "ltsFrom": null,
+                "isEoas": true,
+                "eoasFrom": null,
+                "isEol": true,
+                "eolFrom": "2019-03-18",
+                "isMaintained": false,
+                "latest": {
+                    "name": "3.4.10",
+                    "date": "2019-03-18",
+                    "link": "https://www.python.org/downloads/release/python-3410/"
+                },
+                "custom": {
+                    "pep": "PEP-0429"
+                }
+            },
+            {
+                "name": "3.3",
+                "codename": null,
+                "label": "3.3",
+                "releaseDate": "2012-09-29",
+                "isLts": false,
+                "ltsFrom": null,
+                "isEoas": true,
+                "eoasFrom": null,
+                "isEol": true,
+                "eolFrom": "2017-09-29",
+                "isMaintained": false,
+                "latest": {
+                    "name": "3.3.7",
+                    "date": "2017-09-19",
+                    "link": "https://www.python.org/downloads/release/python-337/"
+                },
+                "custom": {
+                    "pep": "PEP-0398"
+                }
+            },
+            {
+                "name": "3.2",
+                "codename": null,
+                "label": "3.2",
+                "releaseDate": "2011-02-20",
+                "isLts": false,
+                "ltsFrom": null,
+                "isEoas": true,
+                "eoasFrom": null,
+                "isEol": true,
+                "eolFrom": "2016-02-20",
+                "isMaintained": false,
+                "latest": {
+                    "name": "3.2.6",
+                    "date": "2014-10-12",
+                    "link": "https://www.python.org/downloads/release/python-326/"
+                },
+                "custom": {
+                    "pep": "PEP-0392"
+                }
+            },
+            {
+                "name": "2.7",
+                "codename": null,
+                "label": "2.7",
+                "releaseDate": "2010-07-03",
+                "isLts": false,
+                "ltsFrom": null,
+                "isEoas": true,
+                "eoasFrom": null,
+                "isEol": true,
+                "eolFrom": "2020-01-01",
+                "isMaintained": false,
+                "latest": {
+                    "name": "2.7.18",
+                    "date": "2020-04-19",
+                    "link": "https://www.python.org/downloads/release/python-2718/"
+                },
+                "custom": {
+                    "pep": "PEP-0373"
+                }
+            },
+            {
+                "name": "3.1",
+                "codename": null,
+                "label": "3.1",
+                "releaseDate": "2009-06-27",
+                "isLts": false,
+                "ltsFrom": null,
+                "isEoas": true,
+                "eoasFrom": null,
+                "isEol": true,
+                "eolFrom": "2012-04-09",
+                "isMaintained": false,
+                "latest": {
+                    "name": "3.1.5",
+                    "date": "2012-04-06",
+                    "link": "https://www.python.org/downloads/release/python-315/"
+                },
+                "custom": {
+                    "pep": "PEP-0375"
+                }
+            },
+            {
+                "name": "3.0",
+                "codename": null,
+                "label": "3.0",
+                "releaseDate": "2008-12-03",
+                "isLts": false,
+                "ltsFrom": null,
+                "isEoas": true,
+                "eoasFrom": null,
+                "isEol": true,
+                "eolFrom": "2009-06-27",
+                "isMaintained": false,
+                "latest": {
+                    "name": "3.0.1",
+                    "date": "2009-02-12",
+                    "link": "https://www.python.org/downloads/release/python-301/"
+                },
+                "custom": {
+                    "pep": "PEP-0361"
+                }
+            },
+            {
+                "name": "2.6",
+                "codename": null,
+                "label": "2.6",
+                "releaseDate": "2008-10-01",
+                "isLts": false,
+                "ltsFrom": null,
+                "isEoas": true,
+                "eoasFrom": null,
+                "isEol": true,
+                "eolFrom": "2013-10-29",
+                "isMaintained": false,
+                "latest": {
+                    "name": "2.6.9",
+                    "date": "2013-10-29",
+                    "link": "https://www.python.org/downloads/release/python-269/"
+                },
+                "custom": {
+                    "pep": "PEP-0361"
+                }
+            }
+        ]
+    }
+}

install_and_run.bat

@@ -12,7 +12,7 @@ set "SELF_DIR=%~dp0"
 set "SCRIPT=%SELF_DIR%pptx_image_compress.py"
 
 rem ---- Python Embeddable config ----
-set "PY_EMBED_VERSION=3.13.7"
+set "PY_EMBED_VERSION=3.14.6"
 set "PY_EMBED_ZIP=python-%PY_EMBED_VERSION%-embed-amd64.zip"
 set "PY_EMBED_URL=https://www.python.org/ftp/python/%PY_EMBED_VERSION%/%PY_EMBED_ZIP%"
 set "PY_DIR=%SELF_DIR%python-embed"
@@ -23,7 +23,7 @@ set "CAE_DIR=%SELF_DIR%bin"
 set "CAE_EXE=caesiumclt.exe"
 if exist "%CAE_DIR%\%CAE_EXE%" (
     set "PATH=%CAE_DIR%;%PATH%"
-) else (
+) else (    
     if exist "%SELF_DIR%%CAE_EXE%" (
         set "PATH=%SELF_DIR%;%PATH%"
     ) else (
@@ -44,13 +44,22 @@ rem ---- Python discovery (avoid MS Store alias) ----
 set "PY_CMD="
 set "USE_PY_LAUNCHER="
 
-rem 1) Prefer local embeddable first
+if defined VIRTUAL_ENV (
-if exist "%PY_EXE%" (
+    if exist "%VIRTUAL_ENV%\Scripts\python.exe" (
-    set "PY_CMD=%PY_EXE%"
+        set "PY_CMD=%VIRTUAL_ENV%\Scripts\python.exe"
+        goto :have_python
+    )
+)
+
+if exist "%SELF_DIR%.venv\Scripts\python.exe" (
+    set "PY_CMD=%SELF_DIR%.venv\Scripts\python.exe"
+    goto :have_python
+)
+if exist "%SELF_DIR%venv\Scripts\python.exe" (
+    set "PY_CMD=%SELF_DIR%venv\Scripts\python.exe"
     goto :have_python
 )
 
-rem 2) Real python.exe in PATH (exclude WindowsApps alias)
 for /f "delims=" %%P in ('where python.exe 2^>nul') do (
     echo %%P | find /I "WindowsApps" >nul
     if errorlevel 1 (
@@ -66,7 +75,6 @@ for /f "delims=" %%P in ('where python3.exe 2^>nul') do (
     )
 )
 
-rem 3) Python launcher py.exe (exclude WindowsApps)
 for /f "delims=" %%P in ('where py.exe 2^>nul') do (
     echo %%P | find /I "WindowsApps" >nul
     if errorlevel 1 (
@@ -76,7 +84,11 @@ for /f "delims=" %%P in ('where py.exe 2^>nul') do (
     )
 )
 
-rem 4) Download embeddable locally
+if exist "%PY_EXE%" (
+    set "PY_CMD=%PY_EXE%"
+    goto :have_python
+)
+
 if not exist "%SELF_DIR%%PY_EMBED_ZIP%" (
     echo [INFO] Kein Python gefunden. Lade Embeddable Python %PY_EMBED_VERSION% ...
     powershell -NoLogo -NoProfile -Command ^
@@ -98,6 +110,14 @@ if errorlevel 1 (
 )
 set "PY_CMD=%PY_EXE%"
 
+rem ---- Fix embedded Python isolation for the installation of pip ----
+set "PTH_FILE=%PY_DIR%\python314._pth"
+if exist "%PTH_FILE%" (
+    echo [INFO] Enabling site-packages in embedded Python...
+    powershell -Command ^
+     "(Get-Content '%PTH_FILE%') -replace '^#?\s*import site','import site' | Set-Content '%PTH_FILE%'"
+)
+
 :have_python
 if not defined PY_CMD (
     echo [ERROR] Konnte Python nicht ermitteln. Abbruch.
@@ -110,11 +130,84 @@ if not exist "%SCRIPT%" (
     exit /b 6
 )
 
+set "ALL_ARGS=%*"
+set "RUN_ARGS=%ALL_ARGS%"
+set "DEBUG_MODE=0"
+
+if "%~1"=="--debug" (
+    set "DEBUG_MODE=1"
+    set "RUN_ARGS=!ALL_ARGS:~8!"
+    if "!RUN_ARGS:~0,1!"==" " set "RUN_ARGS=!RUN_ARGS:~1!"
+)
+
+if "!RUN_ARGS!"=="" set "RUN_ARGS=-h"
+
+echo [INFO] Pruefe und installiere Python-Abhaengigkeit: svg-polish ...
+set "PIP_OK=0"
+if defined USE_PY_LAUNCHER (
+    "%PY_CMD%" -3 -m pip --version >nul 2>&1
+) else (
+    "%PY_CMD%" -m pip --version >nul 2>&1
+)
+if not errorlevel 1 set "PIP_OK=1"
+
+if "%PIP_OK%"=="0" (
+    echo [INFO] pip nicht verfuegbar. Versuche ensurepip ...
+    if defined USE_PY_LAUNCHER (
+        "%PY_CMD%" -3 -m ensurepip --upgrade >nul 2>&1
+    ) else (
+        "%PY_CMD%" -m ensurepip --upgrade >nul 2>&1
+    )
+    if defined USE_PY_LAUNCHER (
+        "%PY_CMD%" -3 -m pip --version >nul 2>&1
+    ) else (
+        "%PY_CMD%" -m pip --version >nul 2>&1
+    )
+    if not errorlevel 1 set "PIP_OK=1"
+)
+
+if "%PIP_OK%"=="0" (
+    if /I "%PY_CMD%"=="%PY_EXE%" (
+        echo [INFO] ensurepip nicht verfuegbar. Lade get-pip.py ...
+        powershell -NoLogo -NoProfile -Command ^
+         "try { Invoke-WebRequest -Uri 'https://bootstrap.pypa.io/get-pip.py' -OutFile '%SELF_DIR%get-pip.py' -UseBasicParsing; exit 0 } catch { Write-Error $_; exit 1 }"
+        if exist "%SELF_DIR%get-pip.py" (
+            "%PY_CMD%" "%SELF_DIR%get-pip.py" >nul 2>&1
+            del "%SELF_DIR%get-pip.py" >nul 2>&1
+        )
+        "%PY_CMD%" -m pip --version >nul 2>&1
+        if not errorlevel 1 set "PIP_OK=1"
+    )
+)
+
+if "%PIP_OK%"=="1" (
+    if defined USE_PY_LAUNCHER (
+        "%PY_CMD%" -3 -m pip install --disable-pip-version-check --quiet --no-warn-script-location svg-polish 
+    ) else (
+        "%PY_CMD%" -m pip install --disable-pip-version-check --quiet --no-warn-script-location svg-polish
+    )
+    if errorlevel 1 (
+        echo [WARN] 'svg-polish' konnte nicht installiert werden. SVG-Dateien werden nicht komprimiert.
+    ) else (
+        echo [OK] 'svg-polish' ist verfuegbar.
+        if %DEBUG_MODE%==1 (
+            echo [DEBUG] pip list:
+            if defined USE_PY_LAUNCHER (
+                "%PY_CMD%" -3 -m pip list
+            ) else (
+                "%PY_CMD%" -m pip list
+            )
+        )
+    )
+) else (
+    echo [WARN] pip konnte nicht eingerichtet werden. SVG-Dateien werden nicht komprimiert.
+)
+
 echo.
 echo [%APP_NAME%] Starte ...
-echo Command: "%PY_CMD%" "%SCRIPT%" %*
+echo Command: "%PY_CMD%" "%SCRIPT%" %RUN_ARGS%
 echo.
-"%PY_CMD%" "%SCRIPT%" %*
+"%PY_CMD%" "%SCRIPT%" %RUN_ARGS%
 set "RC=%ERRORLEVEL%"
 
 echo.

install_and_run.md

@@ -0,0 +1,107 @@
+#  PPTX Image Compressor – Installation Logic
+
+## 1. Intro – One Line Summary
+
+> The script selects the best available Python environment, falls back to a self-installed embedded runtime if necessary, ensures `pip`, installs `svg-polish` when possible, and runs the application with graceful degradation.
+
+## 2. Lightweight Overview
+
+```text
+START
+│
+├─► Find usable Python
+│     ├─ venv (active / local)
+│     ├─ system Python
+│     └─ fallback: download embedded Python
+│
+├─► Ensure pip works
+│     ├─ pip exists → OK
+│     ├─ ensurepip → try fix
+│     └─ get-pip.py → fallback fix
+│
+├─► Install dependency
+│     └─ svg-polish (optional but preferred)
+│
+├─► Run main script
+│
+└─► END
+```
+
+---
+
+## 3. Detailed Logic Tree
+
+```text
+START
+│
+├─► [A] Pre-check: caesiumclt
+│     ├─ found → continue
+│     └─ not found → EXIT
+│
+├─► [B] Python resolution (priority-based)
+│     │
+│     ├─ Active venv (VIRTUAL_ENV)?
+│     │     └─ use it ✅
+│     │
+│     ├─ Local ".venv"?
+│     │     └─ use it ✅
+│     │
+│     ├─ Local "venv"?
+│     │     └─ use it ✅
+│     │
+│     ├─ System Python (python.exe, excluding WindowsApps)?
+│     │     └─ use it ✅
+│     │
+│     ├─ Python launcher (py.exe)?
+│     │     └─ use py -3 ✅
+│     │
+│     ├─ Existing embedded Python?
+│     │     └─ use it ✅
+│     │
+│     └─ NONE FOUND →
+│           ├─ Download embeddable Python
+│           ├─ Extract to python-embed
+│           ├─ Fix isolation (enable "import site")
+│           └─ use it ✅
+│
+├─► [C] Validate main script exists
+│     ├─ missing → EXIT
+│     └─ exists → continue
+│
+├─► [D] Ensure pip availability
+│     │
+│     ├─ pip works?
+│     │     └─ YES → continue ✅
+│     │
+│     └─ NO →
+│          ├─ try: ensurepip
+│          │     ├─ success → ✅
+│          │     └─ fail →
+│          │
+│          └─ if embedded Python:
+│                ├─ download get-pip.py
+│                ├─ execute it
+│                ├─ remove file
+│                └─ re-check pip
+│
+│          ├─ still no pip →
+│          │     └─ WARN: disable SVG compression
+│          │
+│          └─ pip available →
+│                ✅ continue
+│
+├─► [E] Install dependency
+│     ├─ install svg-polish
+│     │     ├─ success → ✅ SVG enabled
+│     │     └─ fail → ⚠ SVG disabled
+│     │
+│     └─ optional debug: pip list
+│
+├─► [F] Run application
+│     ├─ execute Python script
+│     ├─ capture return code
+│     ├─ success → "Fertig"
+│     └─ error → report exit code
+│
+└─► END
+```

pptx_image_compress.py

@@ -1,23 +1,30 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 """
-PPTX Grafik-Komprimier-Tool (nur CaesiumCLT, Multi-Thread, Batch, sauberes Cleanup)
+PPTX Raster & Vector Komprimier-Tool (Raster-Iamges: via CaesiumCLT, Vector-Images: via python Module svg_polish)
-Version: 1.1.3
+Version: 1.1.9
 
+Änderungen in 1.1.9
+- SVG Files Default Profile: `balanced` statt `aggressive`
+- Datei-Eigenschaften der neu generierten PPTX enthält Hinweis auf Compression `compressed by PPTX Image Compressor` 
 
-Highlights:
+Änderungen in 1.1.8:
-- Caesium-Scratch außerhalb des PPTX-Arbeitsverzeichnisses -> keine Tempfiles in finaler PPTX
+- SVG Files werden bei Vorhandensein von svg_polish anhand von 2 Profilen optimiert: balanced|agressive
-- Safety-Cleanup: entfernt 'caesium*' Ordner und '*.tmp' in ppt/media, bevor gezippt wird
-- Overwrite Policy: -O bigger
-- Log: image_name,size_before,size_after,saving,saving_percent
-- Summary inkl. Zeit benötigt
 
-Änderungen in 1.1.3:
+Änderungen in 1.1.7:
-- Changed all UNICODE Chars to ASCII
+- PNG->JPG Fallback für große PNGs hinzugefügt (wenn nach Kompression weiterhin > 500 KB)
+- Logging erweitert: neue Spalte image_type_changed mit Wert png_jpg bei Typwechsel
+
+Änderungen in 1.1.6:
+- Libcaesium 1.3.0 kann nun auch files ignorieren, wenn die Kompression kleiner als <MIN_SAVING> ist
 """
 
 import argparse
+import importlib
+import inspect
 import os
+import re
+import xml.etree.ElementTree as ET
 import sys
 import zipfile
 import tempfile
@@ -30,12 +37,60 @@ from pathlib import Path
 from datetime import timedelta
 from concurrent.futures import ThreadPoolExecutor, as_completed
 from threading import Lock
+from dataclasses import dataclass
+from typing import Callable, List, Optional
 
-__version__ = "1.1.3"
 
-ALLOWED_EXT = {".jpg", ".jpeg", ".png", ".webp", ".gif"}  # GIF wird übersprungen
+
+__version__ = "1.1.9"
+
+RASTER_EXT = {".jpg", ".jpeg", ".png", ".webp", ".gif"}
+VECTOR_EXT = {".svg"}
+ALLOWED_EXT = RASTER_EXT | VECTOR_EXT
 PROGRESS_BAR_LEN = 40
 TEMP_PREFIX = "pptx_compress_"
+DEFAULT_MIN_SAVINGS = "2%"
+PNG_TO_JPEG_THRESHOLD_BYTES = 500 * 1024
+SVG_POLISH_MODULE_NAME = "svg_polish"
+SVG_PROFILE_BALANCED = "balanced"
+SVG_PROFILE_AGGRESSIVE = "aggressive"
+SVG_PROFILE_DEFAULT = SVG_PROFILE_BALANCED
+    
+
+@dataclass
+class DeckResult:
+    input: str
+    output: str
+    ok: bool = False
+    size_before: int = 0
+    size_after: int = 0
+    elapsed_sec: float = 0.0
+    error: Optional[str] = None
+    log_file: Optional[str] = None
+
+
+@dataclass
+class ImageProcessResult:
+    image_name: str
+    orig_size: int
+    chosen_size: int
+    slide_nr: str
+    image_type_changed: str = ""
+
+
+def discover_images(media_dir: Path) -> list[Path]:
+    images: list[Path] = []
+    if media_dir.exists():
+        for f in sorted(media_dir.iterdir()):
+            if f.is_file() and f.suffix.lower() in ALLOWED_EXT:
+                images.append(f)
+    return images
+
+
+def image_result_to_log_line(image_result: ImageProcessResult) -> str:
+    saving = image_result.orig_size - image_result.chosen_size
+    saving_percent = round((saving / image_result.orig_size) * 100, 2) if image_result.orig_size > 0 else 0.0
+    return f"{image_result.image_name};{human_kb(image_result.orig_size)};{human_kb(image_result.chosen_size)};{human_kb(saving)};{saving_percent};{image_result.slide_nr};{image_result.image_type_changed}\n"
 
 
 # -------------------- Utilities --------------------
@@ -75,25 +130,50 @@ def print_progress(i: int, total: int):
     print(f"\rBilder: |{bar}| {i}/{total} ({pct}%)", end="", flush=True)
 
 def zip_dir_to_pptx(src_dir: Path, out_pptx: Path):
+    all_files: list[Path] = []
+    for root, _, files in os.walk(src_dir):
+        for f in files:
+            all_files.append(Path(root) / f)
+
+    content_types = [f for f in all_files if f.name == "[Content_Types].xml"]
+    rest = [f for f in all_files if f.name != "[Content_Types].xml"]
+
     with zipfile.ZipFile(out_pptx, "w", compression=zipfile.ZIP_DEFLATED) as z:
-        for root, _, files in os.walk(src_dir):
+        for full in content_types + rest:
-            for f in files:
+            rel = full.relative_to(src_dir)
-                full = Path(root) / f
+            z.write(full, arcname=str(rel))
-                rel = full.relative_to(src_dir)
-                z.write(full, arcname=str(rel))
 
 def which(cmd: str):
     return shutil.which(cmd)
 
-def compress_with_caesium(original: Path, out_dir: Path, caesium_threads: int | None, quality: int) -> Path | None:
+def compress_with_caesium(
+    original: Path,
+    out_dir: Path,
+    caesium_threads: int | None,
+    quality: int,
+    min_savings: str,
+    output_format: str = "original",
+) -> Path | None:
+    ext = original.suffix.lower()
+    if ext not in RASTER_EXT:
+        return None
     exe = which("caesiumclt")
     if not exe:
         raise RuntimeError("[ERROR] 'caesiumclt' wurde nicht gefunden. Bitte CaesiumCLT installieren und in PATH verfügbar machen.")
     out_dir.mkdir(parents=True, exist_ok=True)
-    ext = original.suffix.lower()
+    cmd = [
-    if ext not in {".jpg", ".jpeg", ".png", ".webp"}:
+        exe,
-        return None
+        "-q",
-    cmd = [exe, "-q", str(quality), "-O", "bigger", "-o", str(out_dir)]
+        str(quality),
+        "-O",
+        "bigger",
+        "--min-savings",
+        min_savings,
+        "--format",
+        output_format,
+        "-o",
+        str(out_dir),
+    ]
     if caesium_threads is not None:
         cmd += ["--threads", str(caesium_threads)]
     cmd += [str(original)]
@@ -102,12 +182,247 @@ def compress_with_caesium(original: Path, out_dir: Path, caesium_threads: int |
         if r.returncode != 0:
             sys.stderr.write(f"[caesiumclt] Fehler bei {original.name}:{r.stderr}")
             return None
+        if output_format == "jpeg":
+            jpg_out = out_dir / f"{original.stem}.jpg"
+            jpeg_out = out_dir / f"{original.stem}.jpeg"
+            if jpg_out.exists():
+                return jpg_out
+            if jpeg_out.exists():
+                return jpeg_out
+            return None
         out_file = out_dir / original.name
         return out_file if out_file.exists() else None
     except Exception as ex:
         sys.stderr.write(f"[caesiumclt] Ausnahme bei {original.name}: {ex}")
         return None
 
+def compressor_accepts_output_format(compressor: Callable[..., Path | None]) -> bool:
+    if compressor is compress_with_caesium:
+        return True
+    try:
+        signature = inspect.signature(compressor)
+    except (TypeError, ValueError):
+        return False
+    return "output_format" in signature.parameters
+
+
+def run_compressor(
+    compressor: Callable[..., Path | None],
+    original: Path,
+    out_dir: Path,
+    caesium_threads: int | None,
+    quality: int,
+    min_savings: str,
+    output_format: str = "original",
+) -> Path | None:
+    if output_format != "original" and not compressor_accepts_output_format(compressor):
+        return None
+    if compressor is compress_with_caesium:
+        return compressor(original, out_dir, caesium_threads, quality, min_savings, output_format)
+    if compressor_accepts_output_format(compressor):
+        return compressor(original, out_dir, caesium_threads, quality, min_savings, output_format)
+    return compressor(original, out_dir, caesium_threads, quality, min_savings)
+
+
+def compress_raster_image(
+    compressor: Callable[..., Path | None],
+    original: Path,
+    out_dir: Path,
+    caesium_threads: int | None,
+    quality: int,
+    min_savings: str,
+) -> Path | None:
+    return run_compressor(
+        compressor=compressor,
+        original=original,
+        out_dir=out_dir,
+        caesium_threads=caesium_threads,
+        quality=quality,
+        min_savings=min_savings,
+    )
+
+
+def import_svg_polish_module() -> object | None:
+    try:
+        return importlib.import_module(SVG_POLISH_MODULE_NAME)
+    except Exception:
+        return None
+
+
+def build_svg_polish_options(svg_polish_module: object, profile: str = SVG_PROFILE_DEFAULT) -> object | None:
+    options_type = getattr(svg_polish_module, "OptimizeOptions", None)
+    if not callable(options_type):
+        return None
+    try:
+        if profile == SVG_PROFILE_BALANCED:
+            return options_type(
+                shorten_ids=True,
+                enable_viewboxing=True,
+            )
+        return options_type(
+            digits=2,
+            style_to_xml=True,
+            group_collapse=True,
+            simple_colors=True,
+            indent_type="none",
+            newlines=False,
+            strip_xml_prolog=True,
+            strip_comments=True,
+            remove_metadata=True,
+            remove_titles=True,
+            remove_descriptions=True,
+            remove_descriptive_elements=True,
+            strip_ids=True,
+            shorten_ids=True,
+            renderer_workaround=False,
+        )
+    except Exception:
+        return None
+
+
+def call_svg_polish_callable(fn: Callable[..., object], options: object | None, *args: object) -> object:
+    if options is not None:
+        try:
+            return fn(*args, options=options)
+        except TypeError:
+            return fn(*args)
+    return fn(*args)
+
+
+def optimize_svg_content_with_module(svg_polish_module: object, original: Path, svg_profile: str = SVG_PROFILE_DEFAULT) -> str | None:
+    options = build_svg_polish_options(svg_polish_module, svg_profile)
+    optimize_path = getattr(svg_polish_module, "optimize_path", None)
+    if callable(optimize_path):
+        result = call_svg_polish_callable(optimize_path, options, original)
+        if isinstance(result, str):
+            return result
+    optimize_file = getattr(svg_polish_module, "optimize_file", None)
+    if callable(optimize_file):
+        result = call_svg_polish_callable(optimize_file, options, str(original))
+        if isinstance(result, str):
+            return result
+    svg_text = original.read_text(encoding="utf-8")
+    optimize = getattr(svg_polish_module, "optimize", None)
+    if callable(optimize):
+        result = call_svg_polish_callable(optimize, options, svg_text)
+        if isinstance(result, str):
+            return result
+    optimize_string = getattr(svg_polish_module, "optimize_string", None)
+    if callable(optimize_string):
+        result = call_svg_polish_callable(optimize_string, options, svg_text)
+        if isinstance(result, str):
+            return result
+    polish = getattr(svg_polish_module, "polish", None)
+    if callable(polish):
+        result = polish(svg_text)
+        if isinstance(result, str):
+            return result
+    return None
+
+
+def compress_svg_with_svg_polish(
+    original: Path,
+    out_dir: Path,
+    svg_profile: str = SVG_PROFILE_DEFAULT,
+) -> Path | None:
+    if original.suffix.lower() not in VECTOR_EXT:
+        return None
+    svg_polish_module = import_svg_polish_module()
+    if svg_polish_module is None:
+        sys.stderr.write(f"[svg_polish] Modul '{SVG_POLISH_MODULE_NAME}' nicht verfügbar für {original.name}\n")
+        return None
+    out_dir.mkdir(parents=True, exist_ok=True)
+    out_file = out_dir / original.name
+    try:
+        optimized_svg = optimize_svg_content_with_module(svg_polish_module, original, svg_profile)
+        if not isinstance(optimized_svg, str):
+            return None
+        out_file.write_text(optimized_svg, encoding="utf-8")
+        if out_file.stat().st_size >= original.stat().st_size:
+            return None
+        return out_file
+    except Exception as ex:
+        sys.stderr.write(f"[svg_polish] Ausnahme bei {original.name}: {ex}")
+        return None
+
+
+def compress_vector_image(
+    original: Path,
+    out_dir: Path,
+    svg_profile: str = SVG_PROFILE_DEFAULT,
+) -> Path | None:
+    if original.suffix.lower() == ".svg":
+        return compress_svg_with_svg_polish(original=original, out_dir=out_dir, svg_profile=svg_profile)
+    return None
+
+
+def compress_image_with_routing(
+    compressor: Callable[..., Path | None],
+    original: Path,
+    out_dir: Path,
+    caesium_threads: int | None,
+    quality: int,
+    min_savings: str,
+    svg_profile: str = SVG_PROFILE_DEFAULT,
+) -> Path | None:
+    if original.suffix.lower() in VECTOR_EXT:
+        return compress_vector_image(original=original, out_dir=out_dir, svg_profile=svg_profile)
+    return compress_raster_image(
+        compressor=compressor,
+        original=original,
+        out_dir=out_dir,
+        caesium_threads=caesium_threads,
+        quality=quality,
+        min_savings=min_savings,
+    )
+
+
+def update_relationship_targets(work_dir: Path, old_name: str, new_name: str) -> None:
+    rels_namespace = "{http://schemas.openxmlformats.org/package/2006/relationships}Relationship"
+    for rels_file in work_dir.rglob("*.rels"):
+        try:
+            tree = ET.parse(rels_file)
+            root = tree.getroot()
+            changed = False
+            for rel in root.findall(f".//{rels_namespace}"):
+                target = rel.attrib.get("Target", "")
+                if Path(target).name == old_name:
+                    rel.attrib["Target"] = re.sub(r"[^/\\]+$", new_name, target)
+                    changed = True
+            if changed:
+                tree.write(rels_file, encoding="utf-8", xml_declaration=True)
+        except (ET.ParseError, OSError):
+            continue
+
+
+def ensure_jpg_content_type(work_dir: Path) -> None:
+    content_types_path = work_dir / "[Content_Types].xml"
+    if not content_types_path.exists():
+        return
+    content_ns = "{http://schemas.openxmlformats.org/package/2006/content-types}"
+    try:
+        tree = ET.parse(content_types_path)
+        root = tree.getroot()
+        has_jpg_default = False
+        for default in root.findall(f"{content_ns}Default"):
+            ext = default.attrib.get("Extension", "").lower()
+            if ext == "jpg":
+                has_jpg_default = True
+                break
+        if not has_jpg_default:
+            ET.SubElement(
+                root,
+                f"{content_ns}Default",
+                {
+                    "Extension": "jpg",
+                    "ContentType": "image/jpeg",
+                },
+            )
+            tree.write(content_types_path, encoding="utf-8", xml_declaration=True)
+    except (ET.ParseError, OSError):
+        return
+
+
 def format_duration(seconds: float) -> str:
     total_ms = int(round(seconds * 1000))
     td = timedelta(milliseconds=total_ms)
@@ -117,19 +432,125 @@ def format_duration(seconds: float) -> str:
         return f"{hms}.{frac[:2]}"
     return base
 
+def build_image_slide_index(rels_dir: Path) -> dict[str, List[int]]:
+    if not rels_dir.exists() or not rels_dir.is_dir():
+        return {}
+
+    image_to_slides: dict[str, set[int]] = {}
+
+    for rels_path in rels_dir.iterdir():
+        rels_file = rels_path.name
+        if rels_file.startswith("slide") and rels_file.endswith(".xml.rels") and rels_path.is_file():
+            match = re.search(r"slide(\d+)\.xml\.rels$", rels_file)
+            if not match:
+                continue
+            slide_number = int(match.group(1))
+            try:
+                tree = ET.parse(rels_path)
+                root = tree.getroot()
+                for rel in root.findall(".//{http://schemas.openxmlformats.org/package/2006/relationships}Relationship"):
+                    target = rel.attrib.get("Target", "")
+                    image_name = Path(target).name
+                    if image_name:
+                        if image_name not in image_to_slides:
+                            image_to_slides[image_name] = set()
+                        image_to_slides[image_name].add(slide_number)
+            except (ET.ParseError, OSError):
+                print(f"Fehler beim Lesen von {rels_file}")
+
+    return {img: sorted(slides) for img, slides in image_to_slides.items()}
+
+
+def process_image_file(
+    idx: int,
+    img_path: Path,
+    scratch_dir: Path,
+    image_to_slides: dict[str, List[int]],
+    caesium_threads: int | None,
+    quality: int,
+    min_savings: str,
+    compressor: Callable[..., Path | None],
+    svg_profile: str = SVG_PROFILE_DEFAULT,
+) -> ImageProcessResult:
+    orig_size = img_path.stat().st_size
+    chosen_size = orig_size
+    chosen_name = img_path.name
+    image_type_changed = ""
+    found_in_slide = image_to_slides.get(img_path.name)
+    slide_nr = "NOT_USED" if found_in_slide is None else str(found_in_slide)
+
+    try:
+        out_sub = scratch_dir / f"img_{idx:06d}"
+        caesium_out = compress_image_with_routing(
+            compressor=compressor,
+            original=img_path,
+            out_dir=out_sub,
+            caesium_threads=caesium_threads,
+            quality=quality,
+            min_savings=min_savings,
+            svg_profile=svg_profile,
+        )
+        if caesium_out and caesium_out.exists():
+            compressed_size = caesium_out.stat().st_size
+            if compressed_size < orig_size:
+                tmp_target = img_path.with_suffix(img_path.suffix + ".tmp")
+                shutil.copy2(caesium_out, tmp_target)
+                tmp_target.replace(img_path)
+                chosen_size = compressed_size
+
+        if img_path.suffix.lower() == ".png" and chosen_size > PNG_TO_JPEG_THRESHOLD_BYTES:
+            jpg_candidate = run_compressor(
+                compressor=compressor,
+                original=img_path,
+                out_dir=out_sub,
+                caesium_threads=caesium_threads,
+                quality=quality,
+                min_savings="0%",
+                output_format="jpeg",
+            )
+            if jpg_candidate and jpg_candidate.exists():
+                jpg_size = jpg_candidate.stat().st_size
+                if jpg_size < chosen_size:
+                    jpg_target = img_path.with_suffix(".jpg")
+                    tmp_target = jpg_target.with_suffix(".jpg.tmp")
+                    shutil.copy2(jpg_candidate, tmp_target)
+                    tmp_target.replace(jpg_target)
+                    img_path.unlink(missing_ok=True)
+                    chosen_size = jpg_size
+                    chosen_name = jpg_target.name
+                    image_type_changed = "png_jpg"
+    except Exception:
+        chosen_size = orig_size
+        chosen_name = img_path.name
+        image_type_changed = ""
+
+    return ImageProcessResult(
+        image_name=chosen_name,
+        orig_size=orig_size,
+        chosen_size=chosen_size,
+        slide_nr=slide_nr,
+        image_type_changed=image_type_changed,
+    )
+
+
+
 # -------------------- Core per-deck processing --------------------
-def process_single_deck(input_pptx: Path, output_pptx: Path, threads: int, quality: int) -> dict:
+def process_single_deck(
+    input_pptx: Path,
+    output_pptx: Path,
+    threads: int,
+    quality: int,
+    min_savings: str,
+    svg_profile: str = SVG_PROFILE_DEFAULT,
+    compressor: Callable[..., Path | None] = compress_with_caesium,
+) -> DeckResult:
     start_time = time.perf_counter()
-    result = {
+    result = DeckResult(
-        "input": str(input_pptx),
+        input=str(input_pptx),
-        "output": str(output_pptx),
+        output=str(output_pptx),
-        "ok": False,
+    )
-        "size_before": 0,
+    work_dir: Optional[Path] = None
-        "size_after": 0,
+    scratch_dir: Optional[Path] = None
-        "elapsed_sec": 0.0,
-        "error": None,
-        "log_file": None,
-    }
 
     try:
         if not input_pptx.exists() or input_pptx.suffix.lower() != ".pptx":
@@ -140,71 +561,69 @@ def process_single_deck(input_pptx: Path, output_pptx: Path, threads: int, quali
 
         work_dir = Path(tempfile.mkdtemp(prefix=TEMP_PREFIX + "work_"))
         scratch_dir = Path(tempfile.mkdtemp(prefix=TEMP_PREFIX + "scratch_"))
-
         log_file = output_pptx.with_suffix(".log.csv")
         ensure_clean_file(log_file)
-        log_lines = ["image_name;size_before(kb);size_after(kb);saving(kb);saving_percent(%)\n"]
+        log_lines = ["image_name;size_before(kb);size_after(kb);saving(kb);saving_percent(%);in_slide_number;image_type_changed\n"]
 
         size_before = input_pptx.stat().st_size
-        result["size_before"] = size_before
+        result.size_before = size_before
 
         with zipfile.ZipFile(input_pptx, "r") as z:
             z.extractall(work_dir)
 
+        slides_dir  = work_dir / "ppt" / "slides"
+        rels_dir = slides_dir / "_rels"
         media_dir = work_dir / "ppt" / "media"
-        images = []
+
-        if media_dir.exists():
+        images = discover_images(media_dir)
-            for f in sorted(media_dir.iterdir()):
-                if f.is_file() and f.suffix.lower() in ALLOWED_EXT:
-                    images.append(f)
 
         total = len(images)
         print(f"[Processing] {input_pptx.name}: {total} Bild(er) gefunden")
         print_progress(0, total)
 
-        if not which("caesiumclt"):
+        if not which("caesiumclt") and compressor is compress_with_caesium:
             raise RuntimeError("'caesiumclt' nicht gefunden. Bitte installieren und in PATH verfügbar machen.")
 
-        caesium_threads = 1 if threads and threads > 1 else None
+        caesium_threads = 1 if threads > 1 else None
         lock = Lock()
         done_count = 0
+        image_to_slides = build_image_slide_index(rels_dir)
+        renamed_images: list[tuple[str, str]] = []
 
         def worker(idx: int, img_path: Path):
             nonlocal done_count
-            ext = img_path.suffix.lower()
+            image_result = process_image_file(
-            orig_size = img_path.stat().st_size
+                idx=idx,
-            if ext == ".gif":
+                img_path=img_path,
-                with lock:
+                scratch_dir=scratch_dir,
-                    done_count += 1
+                image_to_slides=image_to_slides,
-                    log_lines.append(f"{img_path.name};{human_kb(orig_size)};{human_kb(orig_size)};0;0.0\n")
+                caesium_threads=caesium_threads,
-                    print_progress(done_count, total)
+                quality=quality,
-                return
+                min_savings=min_savings,
-            chosen_size = orig_size
+                compressor=compressor,
-            try:
+                svg_profile=svg_profile,
-                out_sub = scratch_dir / f"img_{idx:06d}"
+            )
-                caesium_out = compress_with_caesium(img_path, out_sub, caesium_threads, quality)
+
-                if caesium_out and caesium_out.exists():
+            with lock:
-                    s = caesium_out.stat().st_size
+                if image_result.image_name != img_path.name:
-                    if s < orig_size:
+                    renamed_images.append((img_path.name, image_result.image_name))
-                        tmp_target = img_path.with_suffix(img_path.suffix + ".tmp")
+                log_lines.append(image_result_to_log_line(image_result))
-                        shutil.copy2(caesium_out, tmp_target)
+                done_count += 1
-                        tmp_target.replace(img_path)
+                print_progress(done_count, total)
-                        chosen_size = s
-            except Exception:
-                chosen_size = orig_size
-            finally:
-                saving = orig_size - chosen_size
-                saving_percent = round((saving / orig_size) * 100, 2) if orig_size > 0 else 0.0
-                with lock:
-                    log_lines.append(f"{img_path.name};{human_kb(orig_size)};{human_kb(chosen_size)};{human_kb(saving)};{saving_percent}\n")
-                    done_count += 1
-                    print_progress(done_count, total)
 
         if total > 0:
             with ThreadPoolExecutor(max_workers=max(1, threads)) as ex:
                 futures = [ex.submit(worker, i, p) for i, p in enumerate(images, start=1)]
-                for _ in as_completed(futures):
+                for fut in as_completed(futures):
-                    pass
+                    try:
+                        fut.result()
+                    except Exception as exc:
+                        sys.stderr.write(f"[worker] Unerwarteter Fehler: {exc}\n")
+
+        if renamed_images:
+            for old_name, new_name in renamed_images:
+                update_relationship_targets(work_dir, old_name, new_name)
+            ensure_jpg_content_type(work_dir)
 
         print()  # newline
 
@@ -224,9 +643,11 @@ def process_single_deck(input_pptx: Path, output_pptx: Path, threads: int, quali
                     except Exception:
                         pass
 
+        update_core_description(work_dir, "PPTX Image Compressor",__version__)
+
         zip_dir_to_pptx(work_dir, output_pptx)
         size_after = output_pptx.stat().st_size
-        result["size_after"] = size_after
+        result.size_after = size_after
 
         try:
             with open(log_file, "w", encoding="utf-8") as f:
@@ -235,9 +656,9 @@ def process_single_deck(input_pptx: Path, output_pptx: Path, threads: int, quali
             pass
 
         elapsed = time.perf_counter() - start_time
-        result["elapsed_sec"] = elapsed
+        result.elapsed_sec = elapsed
-        result["log_file"] = str(log_file)
+        result.log_file = str(log_file)
-        result["ok"] = True
+        result.ok = True
 
         savings_pct = 0.0 if size_before == 0 else round(100.0 * (size_before - size_after) / size_before, 2)
         print(f"[OK] Fertig!  ({input_pptx.name})")
@@ -249,16 +670,12 @@ def process_single_deck(input_pptx: Path, output_pptx: Path, threads: int, quali
         print("  Log:       ", log_file)
 
     except Exception as e:
-        result["error"] = str(e)
+        result.error = str(e)
     finally:
-        try:
+        if work_dir is not None:
-            shutil.rmtree(work_dir, ignore_errors=True)  # type: ignore[name-defined]
+            shutil.rmtree(work_dir, ignore_errors=True)
-        except Exception:
+        if scratch_dir is not None:
-            pass
+            shutil.rmtree(scratch_dir, ignore_errors=True)
-        try:
-            shutil.rmtree(scratch_dir, ignore_errors=True)  # type: ignore[name-defined]
-        except Exception:
-            pass
         cleanup_old_temps()
 
     return result
@@ -312,38 +729,8 @@ def collect_from_dir(input_dir: Path, pattern: str, recursive: bool) -> list[Pat
 
 # -------------------- CLI --------------------
 def main():
-    parser = argparse.ArgumentParser(
+    parser, args = extractParserArguments()
-        description="PPTX Grafik-Komprimier-Tool (nur CaesiumCLT, Multi-Thread, Batch, sauberes Cleanup)",
+    input_files = validateParserArguments(parser, args)
-        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
-    )
-    parser.add_argument('-i','--input', nargs='*', help='Input-PPTX (eine oder mehrere, Wildcards erlaubt). Bei mehreren: -O erforderlich.')
-    parser.add_argument('-o','--output', help='Output-PPTX (nur Single-Mode)')
-    parser.add_argument('-O','--output-dir', help='Output-Verzeichnis (erforderlich für Batch)')
-    parser.add_argument('--input-dir', help='Eingabe-Verzeichnis (optional, für Batch)')
-    parser.add_argument('--pattern', default='*.pptx', help='Dateimuster für --input-dir')
-    parser.add_argument('--recursive', action='store_true', help='Rekursiv in --input-dir suchen')
-    #parser.add_argument('-t','--threads', type=int, default=min(32, os.cpu_count() or 4), help='Anzahl paralleler Threads pro Datei')
-    parser.add_argument('-t','--threads', type=int, default=16, help='Anzahl paralleler Threads pro Datei')
-    parser.add_argument('-q','--quality', type=int, default=90, help='Qualität für caesiumclt (0..100), höher = bessere Qualität / größere Datei')
-    parser.add_argument('--version', action='version', version=f'%(prog)s {__version__}')
-    
-    args = parser.parse_args()
-
-    print("Threads used:     ", args.threads," Threads")
-
-    if args.quality < 0 or args.quality > 100:
-        print('[ERROR] Ungültige Qualität. Erlaubt: 0..100')
-        sys.exit(1)
-
-    input_files: list[Path] = []
-    if args.input:
-        input_files.extend(expand_inputs(args.input))
-    if args.input_dir:
-        input_files.extend(collect_from_dir(Path(args.input_dir), args.pattern, args.recursive))
-
-    if len(input_files) == 0:
-        parser.print_help()
-        sys.exit(1)
 
     batch_mode = len(input_files) > 1
 
@@ -355,6 +742,9 @@ def main():
         print("[ERROR] 'caesiumclt' nicht gefunden. Bitte installieren und in PATH verfügbar machen.")
         sys.exit(3)
 
+    if import_svg_polish_module() is None:
+        print("[WARN] 'svg-polish' nicht gefunden. SVG-Dateien werden nicht komprimiert. Installation: python -m pip install svg-polish")
+
     overall_before = 0
     overall_after = 0
     successes = 0
@@ -370,14 +760,14 @@ def main():
                 failures += 1
                 continue
             dst = out_dir / f"{src.stem}_compressed.pptx"
-            res = process_single_deck(src, dst, args.threads, args.quality)
+            res = process_single_deck(src, dst, args.threads, args.quality, args.min_savings, args.svg_profile)
-            if res['ok']:
+            if res.ok:
                 successes += 1
-                overall_before += res['size_before']
+                overall_before += res.size_before
-                overall_after += res['size_after']
+                overall_after += res.size_after
             else:
                 failures += 1
-                print(f"  Fehler: {src.name} -> {res['error']}")
+                print(f"  Fehler: {src.name} -> {res.error}")
     else:
         src = input_files[0]
         if args.output_dir:
@@ -385,14 +775,14 @@ def main():
             dst = Path(args.output_dir) / f"{src.stem}_compressed.pptx"
         else:
             dst = Path(args.output).resolve() if args.output else src.with_name(f"{src.stem}_compressed.pptx")
-        res = process_single_deck(src, dst, args.threads, args.quality)
+        res = process_single_deck(src, dst, args.threads, args.quality, args.min_savings)
-        if res['ok']:
+        if res.ok:
             successes += 1
-            overall_before += res['size_before']
+            overall_before += res.size_before
-            overall_after += res['size_after']
+            overall_after += res.size_after
         else:
             failures += 1
-            print(f"  Fehler: {src.name} -> {res['error']}")
+            print(f"  Fehler: {src.name} -> {res.error}")
 
     if batch_mode:
             
@@ -410,6 +800,87 @@ def main():
         print(f"Gesamtgröße nachher: {human_mb(overall_after)} MB")
         print(f"Gesamt-Ersparnis:    {pct}%")
 
+def validateParserArguments(parser, args):
+    print("Threads used:     ", args.threads," Threads")
+
+    if args.quality < 0 or args.quality > 100:
+        print('[ERROR] Ungültige Qualität. Erlaubt: 0..100')
+        sys.exit(1)
+
+    input_files: list[Path] = []
+    if args.input:
+        input_files.extend(expand_inputs(args.input))
+    if args.input_dir:
+        input_files.extend(collect_from_dir(Path(args.input_dir), args.pattern, args.recursive))
+
+    if len(input_files) == 0:
+        parser.print_help()
+        sys.exit(1)
+    return input_files
+
+def extractParserArguments():
+    parser = argparse.ArgumentParser(
+        description="PPTX Grafik-Komprimier-Tool (nur CaesiumCLT, Multi-Thread, Batch, sauberes Cleanup)",
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
+    )
+    parser.add_argument('-i','--input', nargs='*', help='Input-PPTX (eine oder mehrere, Wildcards erlaubt). Bei mehreren: -O erforderlich.')
+    parser.add_argument('--input-dir', help='Eingabe-Verzeichnis (optional, für Batch)')
+    parser.add_argument('-o','--output', help='Output-PPTX (nur Single-Mode)')
+    parser.add_argument('-O','--output-dir', help='Output-Verzeichnis (erforderlich für Batch)')
+    parser.add_argument('--pattern', default='*.pptx', help='Dateimuster für --input-dir')
+    parser.add_argument('--recursive', action='store_true', help='Rekursiv in --input-dir suchen')
+    # Standard as of https://docs.python.org/3/library/concurrent.futures.html. Changed in version 3.13: Default value of max_workers is changed to min(32, (os.process_cpu_count() or 1) + 4).
+    # On my machine this is 16 Threads
+    parser.add_argument('-t','--threads', type=int, default=min(32, (os.process_cpu_count() or 1) + 4), help='Anzahl paralleler Threads pro Datei') 
+    parser.add_argument('-q','--quality', type=int, default=90, help='Qualität für caesiumclt (0..100), höher = bessere Qualität / größere Datei')
+    parser.add_argument('--min-savings', default=DEFAULT_MIN_SAVINGS, help="Mindestersparnis für caesiumclt (z. B. 2%%, 100KB, 1MB oder Bytes als Zahl)")
+    parser.add_argument('--svg-profile', choices=[SVG_PROFILE_BALANCED, SVG_PROFILE_AGGRESSIVE], default=SVG_PROFILE_DEFAULT, help='Optimierungsprofil für SVG-Kompression')
+    parser.add_argument('--version', action='version', version=f'%(prog)s {__version__}',  help="Zeigt die Versionsnummer an" )
+    
+    args = parser.parse_args()
+
+    return parser,args
+
+
+
+def update_core_description(base_dir, app_name, version):
+    core_xml_path = Path(base_dir) / "docProps" / "core.xml"
+
+    if not core_xml_path.exists():
+        raise FileNotFoundError(f"{core_xml_path} nicht gefunden")
+
+    # Namespaces definieren
+    ns = {
+        "cp": "http://schemas.openxmlformats.org/package/2006/metadata/core-properties",
+        "dc": "http://purl.org/dc/elements/1.1/",
+        "dcterms": "http://purl.org/dc/terms/",
+        "xsi": "http://www.w3.org/2001/XMLSchema-instance"
+    }
+
+    # Registrieren, damit Prefixe erhalten bleiben
+    for prefix, uri in ns.items():
+        ET.register_namespace(prefix, uri)
+
+    tree = ET.parse(core_xml_path)
+    root = tree.getroot()
+
+    description_text = f"compressed by {app_name} {version}"
+
+    # Suche vorhandenes Element
+    desc_elem = root.find("dc:description", ns)
+
+    if desc_elem is None:
+        # neu anlegen
+        desc_elem = ET.SubElement(
+            root,
+            f"{{{ns['dc']}}}description"
+        )
+
+    # Text setzen/überschreiben
+    desc_elem.text = description_text
+
+    # Datei speichern
+    tree.write(core_xml_path, encoding="utf-8", xml_declaration=True)
 
 
 

requirements-dev.txt

@@ -0,0 +1,3 @@
+svg-polish==1.0.0
+pytest==9.0.3
+pytest-cov==7.1.0

requirements.txt

@@ -0,0 +1 @@
+svg-polish==1.0.0

samples/README.txt

@@ -1 +0,0 @@
-Place your PPTX files here for testing, or use -i with a full path.

templates/dragdrop.tpl.bat

@@ -0,0 +1,39 @@
+@echo off
+setlocal EnableExtensions EnableDelayedExpansion
+
+if "%~1"=="" goto help
+
+set "INPUT=%~1"
+set "EXT=%~x1"
+set "PATH=%PATH%;%~dp0"
+
+if /I not "%EXT%"==".pptx" (
+    echo [ERROR] Only .pptx supported
+    pause
+    exit /b 1
+)
+
+echo [INFO] Compressing %~n1
+
+rem optional: ensure correct working dir
+pushd "%~dp0"
+
+"%~dp0pptx-image-compress.exe" -i "%INPUT%"
+set RC=%ERRORLEVEL%
+
+popd
+
+if %RC% neq 0 (
+    echo [ERROR] Failed (%RC%)
+) else (
+    echo [SUCCESS] Done
+)
+
+pause
+exit /b %RC%
+
+:help
+echo.
+echo Drag ^& Drop a .pptx file onto this script
+echo.
+pause

templates/run.tpl.bat

@@ -0,0 +1,8 @@
+@echo off
+setlocal EnableExtensions
+
+if "%~1"=="" (
+    "%~dp0pptx-image-compress.exe" -h
+) else (
+    "%~dp0pptx-image-compress.exe" %*
+)

test_pptx_image_compress.py

@@ -0,0 +1,414 @@
+import tempfile
+import unittest
+import zipfile
+from pathlib import Path
+from unittest import mock
+
+import pptx_image_compress as pic
+
+
+class TestPptxImageCompress(unittest.TestCase):
+    def test_discover_images_filters_extensions(self):
+        with tempfile.TemporaryDirectory() as td:
+            media_dir = Path(td)
+            (media_dir / "a.jpg").write_bytes(b"1")
+            (media_dir / "b.png").write_bytes(b"1")
+            (media_dir / "c.txt").write_bytes(b"1")
+            (media_dir / "d.GIF").write_bytes(b"1")
+            (media_dir / "e.svg").write_bytes(b"<svg/>")
+            images = pic.discover_images(media_dir)
+            self.assertEqual([p.name for p in images], ["a.jpg", "b.png", "d.GIF", "e.svg"])
+
+    def test_image_result_to_log_line(self):
+        image_result = pic.ImageProcessResult(
+            image_name="image1.png",
+            orig_size=1000,
+            chosen_size=800,
+            slide_nr="[1, 2]",
+            image_type_changed="",
+        )
+        line = pic.image_result_to_log_line(image_result)
+        self.assertIn("image1.png", line)
+        self.assertIn("[1, 2]", line)
+        self.assertIn("20.0", line)
+        self.assertTrue(line.endswith(";\n"))
+
+    def test_process_image_file_replaces_when_smaller(self):
+        with tempfile.TemporaryDirectory() as td:
+            root = Path(td)
+            img = root / "image1.png"
+            img.write_bytes(b"A" * 100)
+            scratch = root / "scratch"
+
+            def fake_compressor(original: Path, out_dir: Path, caesium_threads: int | None, quality: int, min_savings: str):
+                out_dir.mkdir(parents=True, exist_ok=True)
+                out = out_dir / original.name
+                out.write_bytes(b"B" * 40)
+                return out
+
+            result = pic.process_image_file(
+                idx=1,
+                img_path=img,
+                scratch_dir=scratch,
+                image_to_slides={"image1.png": [1]},
+                caesium_threads=1,
+                quality=90,
+                min_savings="2%",
+                compressor=fake_compressor,
+            )
+
+            self.assertEqual(result.chosen_size, 40)
+            self.assertEqual(img.stat().st_size, 40)
+            self.assertEqual(result.slide_nr, "[1]")
+
+    def test_process_image_file_converts_large_png_to_jpg(self):
+        with tempfile.TemporaryDirectory() as td:
+            root = Path(td)
+            img = root / "image1.png"
+            img.write_bytes(b"A" * 800000)
+            scratch = root / "scratch"
+
+            def fake_compressor(original: Path, out_dir: Path, caesium_threads: int | None, quality: int, min_savings: str, output_format: str = "original"):
+                out_dir.mkdir(parents=True, exist_ok=True)
+                if output_format == "jpeg":
+                    out = out_dir / "image1.jpg"
+                    out.write_bytes(b"C" * 200000)
+                    return out
+                out = out_dir / original.name
+                out.write_bytes(b"B" * 700000)
+                return out
+
+            result = pic.process_image_file(
+                idx=1,
+                img_path=img,
+                scratch_dir=scratch,
+                image_to_slides={"image1.png": [2]},
+                caesium_threads=1,
+                quality=90,
+                min_savings="2%",
+                compressor=fake_compressor,
+            )
+
+            self.assertEqual(result.image_name, "image1.jpg")
+            self.assertEqual(result.chosen_size, 200000)
+            self.assertEqual(result.image_type_changed, "png_jpg")
+            self.assertFalse(img.exists())
+            self.assertTrue((root / "image1.jpg").exists())
+
+    def test_process_image_file_keeps_original_when_bigger(self):
+        with tempfile.TemporaryDirectory() as td:
+            root = Path(td)
+            img = root / "image1.png"
+            img.write_bytes(b"A" * 100)
+            scratch = root / "scratch"
+
+            def fake_compressor(original: Path, out_dir: Path, caesium_threads: int | None, quality: int, min_savings: str):
+                out_dir.mkdir(parents=True, exist_ok=True)
+                out = out_dir / original.name
+                out.write_bytes(b"B" * 120)
+                return out
+
+            result = pic.process_image_file(
+                idx=1,
+                img_path=img,
+                scratch_dir=scratch,
+                image_to_slides={},
+                caesium_threads=1,
+                quality=90,
+                min_savings="2%",
+                compressor=fake_compressor,
+            )
+
+            self.assertEqual(result.chosen_size, 100)
+            self.assertEqual(img.stat().st_size, 100)
+            self.assertEqual(result.slide_nr, "NOT_USED")
+            self.assertEqual(result.image_type_changed, "")
+
+    def test_process_single_deck_with_injected_compressor(self):
+        with tempfile.TemporaryDirectory() as td:
+            root = Path(td)
+            input_pptx = root / "input.pptx"
+            output_pptx = root / "output.pptx"
+            source_tree = root / "src"
+            rels_dir = source_tree / "ppt" / "slides" / "_rels"
+            media_dir = source_tree / "ppt" / "media"
+            rels_dir.mkdir(parents=True, exist_ok=True)
+            media_dir.mkdir(parents=True, exist_ok=True)
+
+            rels_xml = (
+                "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>"
+                "<Relationships xmlns=\"http://schemas.openxmlformats.org/package/2006/relationships\">"
+                "<Relationship Id=\"rId2\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/image\" Target=\"../media/image1.png\"/>"
+                "</Relationships>"
+            )
+            (rels_dir / "slide1.xml.rels").write_text(rels_xml, encoding="utf-8")
+            (media_dir / "image1.png").write_bytes(b"A" * 100)
+
+            with zipfile.ZipFile(input_pptx, "w", compression=zipfile.ZIP_DEFLATED) as z:
+                for p in source_tree.rglob("*"):
+                    if p.is_file():
+                        z.write(p, arcname=str(p.relative_to(source_tree)))
+
+            def fake_compressor(original: Path, out_dir: Path, caesium_threads: int | None, quality: int, min_savings: str):
+                out_dir.mkdir(parents=True, exist_ok=True)
+                out = out_dir / original.name
+                out.write_bytes(b"B" * 50)
+                return out
+
+            with mock.patch("pptx_image_compress.update_core_description", create=True) as mocked_update_core_description:
+                result = pic.process_single_deck(
+                    input_pptx=input_pptx,
+                    output_pptx=output_pptx,
+                    threads=2,
+                    quality=90,
+                    min_savings="2%",
+                    compressor=fake_compressor,
+                )
+
+            mocked_update_core_description.assert_called_once_with(mock.ANY, "PPTX Image Compressor", pic.__version__)
+            self.assertTrue(result.ok)
+            self.assertEqual(result.error, None)
+            self.assertTrue(output_pptx.exists())
+            self.assertIsNotNone(result.log_file)
+            with zipfile.ZipFile(output_pptx, "r") as z:
+                out_image = z.read("ppt/media/image1.png")
+            self.assertEqual(len(out_image), 50)
+            log_file = result.log_file
+            if log_file is None:
+                self.fail("log_file should not be None")
+            log_text = Path(log_file).read_text(encoding="utf-8")
+            self.assertIn("image_name;size_before(kb);size_after(kb);saving(kb);saving_percent(%);in_slide_number;image_type_changed", log_text)
+            self.assertIn("image1.png", log_text)
+            self.assertIn("[1]", log_text)
+    def test_process_single_deck_updates_rels_on_png_to_jpg(self):
+        with tempfile.TemporaryDirectory() as td:
+            root = Path(td)
+            input_pptx = root / "input_convert.pptx"
+            output_pptx = root / "output_convert.pptx"
+            source_tree = root / "src_convert"
+            rels_dir = source_tree / "ppt" / "slides" / "_rels"
+            media_dir = source_tree / "ppt" / "media"
+            rels_dir.mkdir(parents=True, exist_ok=True)
+            media_dir.mkdir(parents=True, exist_ok=True)
+
+            rels_xml = (
+                "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>"
+                "<Relationships xmlns=\"http://schemas.openxmlformats.org/package/2006/relationships\">"
+                "<Relationship Id=\"rId2\" Type=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships/image\" Target=\"../media/image1.png\"/>"
+                "</Relationships>"
+            )
+            content_types_xml = (
+                "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>"
+                "<Types xmlns=\"http://schemas.openxmlformats.org/package/2006/content-types\">"
+                "<Default Extension=\"rels\" ContentType=\"application/vnd.openxmlformats-package.relationships+xml\"/>"
+                "<Default Extension=\"xml\" ContentType=\"application/xml\"/>"
+                "<Default Extension=\"png\" ContentType=\"image/png\"/>"
+                "</Types>"
+            )
+            (source_tree / "[Content_Types].xml").write_text(content_types_xml, encoding="utf-8")
+            (rels_dir / "slide1.xml.rels").write_text(rels_xml, encoding="utf-8")
+            (media_dir / "image1.png").write_bytes(b"A" * 800000)
+
+            with zipfile.ZipFile(input_pptx, "w", compression=zipfile.ZIP_DEFLATED) as z:
+                for p in source_tree.rglob("*"):
+                    if p.is_file():
+                        z.write(p, arcname=str(p.relative_to(source_tree)))
+
+            def fake_compressor(original: Path, out_dir: Path, caesium_threads: int | None, quality: int, min_savings: str, output_format: str = "original"):
+                out_dir.mkdir(parents=True, exist_ok=True)
+                if output_format == "jpeg":
+                    out = out_dir / "image1.jpg"
+                    out.write_bytes(b"C" * 200000)
+                    return out
+                out = out_dir / original.name
+                out.write_bytes(b"B" * 700000)
+                return out
+
+            with mock.patch("pptx_image_compress.update_core_description", create=True) as mocked_update_core_description:
+                result = pic.process_single_deck(
+                    input_pptx=input_pptx,
+                    output_pptx=output_pptx,
+                    threads=1,
+                    quality=90,
+                    min_savings="2%",
+                    compressor=fake_compressor,
+                )
+
+            mocked_update_core_description.assert_called_once_with(mock.ANY, "PPTX Image Compressor", pic.__version__)
+            self.assertTrue(result.ok)
+            with zipfile.ZipFile(output_pptx, "r") as z:
+                self.assertIn("ppt/media/image1.jpg", z.namelist())
+                self.assertNotIn("ppt/media/image1.png", z.namelist())
+                rels_out = z.read("ppt/slides/_rels/slide1.xml.rels").decode("utf-8")
+                content_types_out = z.read("[Content_Types].xml").decode("utf-8")
+            self.assertIn("image1.jpg", rels_out)
+            self.assertIn("Extension=\"jpg\"", content_types_out)
+            log_file = result.log_file
+            if log_file is None:
+                self.fail("log_file should not be None")
+            log_text = Path(log_file).read_text(encoding="utf-8")
+            self.assertIn("png_jpg", log_text)
+
+
+    def test_compress_image_with_routing_delegates_to_raster(self):
+        with tempfile.TemporaryDirectory() as td:
+            root = Path(td)
+            original = root / "image1.png"
+            original.write_bytes(b"A" * 100)
+            out_dir = root / "out"
+
+            def fake_compressor(original_path: Path, out_subdir: Path, caesium_threads: int | None, quality: int, min_savings: str):
+                out_subdir.mkdir(parents=True, exist_ok=True)
+                out = out_subdir / original_path.name
+                out.write_bytes(b"B" * 80)
+                return out
+
+            out = pic.compress_image_with_routing(
+                compressor=fake_compressor,
+                original=original,
+                out_dir=out_dir,
+                caesium_threads=1,
+                quality=90,
+                min_savings="2%",
+            )
+
+            self.assertIsNotNone(out)
+            if out is None:
+                self.fail("Output should not be None")
+            self.assertEqual(out.name, "image1.png")
+            self.assertEqual(out.stat().st_size, 80)
+    def test_compress_with_caesium_ignores_svg(self):
+        with tempfile.TemporaryDirectory() as td:
+            root = Path(td)
+            svg = root / "vector.svg"
+            svg.write_text("<svg></svg>", encoding="utf-8")
+            out_dir = root / "out"
+
+            with mock.patch("pptx_image_compress.which") as mocked_which:
+                out = pic.compress_with_caesium(
+                    original=svg,
+                    out_dir=out_dir,
+                    caesium_threads=1,
+                    quality=90,
+                    min_savings="2%",
+                )
+
+            self.assertIsNone(out)
+            mocked_which.assert_not_called()
+
+    def test_optimize_svg_content_with_module_uses_optimize_path_with_options(self):
+        with tempfile.TemporaryDirectory() as td:
+            root = Path(td)
+            svg = root / "vector.svg"
+            svg.write_text("<svg></svg>", encoding="utf-8")
+            captured_options = {}
+
+            class FakeOptions:
+                def __init__(self, **kwargs):
+                    captured_options.update(kwargs)
+
+            fake_module = mock.Mock()
+            fake_module.OptimizeOptions = FakeOptions
+            fake_module.optimize_path = mock.Mock(return_value="<svg/>")
+            fake_module.optimize_file = None
+            fake_module.optimize = None
+            fake_module.optimize_string = None
+            fake_module.polish = None
+
+            result = pic.optimize_svg_content_with_module(fake_module, svg)
+
+            self.assertEqual(result, "<svg/>")
+            self.assertEqual(fake_module.optimize_path.call_count, 1)
+
+    def test_build_svg_polish_options_balanced_profile(self):
+        captured_options = {}
+
+        class FakeOptions:
+            def __init__(self, **kwargs):
+                captured_options.update(kwargs)
+
+        fake_module = mock.Mock()
+        fake_module.OptimizeOptions = FakeOptions
+
+        options = pic.build_svg_polish_options(fake_module, pic.SVG_PROFILE_BALANCED)
+
+        self.assertIsNotNone(options)
+        self.assertEqual(captured_options["shorten_ids"], True)
+        self.assertEqual(captured_options["enable_viewboxing"], True)
+        self.assertNotIn("strip_ids", captured_options)
+
+    def test_compress_svg_with_svg_polish_returns_none_when_module_missing(self):
+        with tempfile.TemporaryDirectory() as td:
+            root = Path(td)
+            svg = root / "vector.svg"
+            svg.write_text("<svg></svg>", encoding="utf-8")
+            out_dir = root / "out"
+
+            with mock.patch("pptx_image_compress.import_svg_polish_module", return_value=None):
+                out = pic.compress_svg_with_svg_polish(svg, out_dir)
+
+            self.assertEqual(out, None)
+
+    def test_compress_svg_with_svg_polish_uses_python_module(self):
+        with tempfile.TemporaryDirectory() as td:
+            root = Path(td)
+            svg = root / "vector.svg"
+            svg.write_text("<svg>  <g></g>  </svg>", encoding="utf-8")
+            out_dir = root / "out"
+            fake_module = mock.Mock()
+            fake_module.optimize = mock.Mock(return_value="<svg><g/></svg>")
+            fake_module.optimize_path = None
+            fake_module.optimize_file = None
+            fake_module.optimize_string = None
+            fake_module.polish = None
+            fake_module.OptimizeOptions = None
+
+            with mock.patch("pptx_image_compress.import_svg_polish_module", return_value=fake_module):
+                out = pic.compress_svg_with_svg_polish(svg, out_dir)
+
+            self.assertEqual(out, out_dir / "vector.svg")
+            self.assertTrue((out_dir / "vector.svg").exists())
+            self.assertEqual((out_dir / "vector.svg").read_text(encoding="utf-8"), "<svg><g/></svg>")
+            fake_module.optimize.assert_called_once_with("<svg>  <g></g>  </svg>")
+
+    def test_compress_svg_with_svg_polish_uses_polish_fallback(self):
+        with tempfile.TemporaryDirectory() as td:
+            root = Path(td)
+            svg = root / "vector.svg"
+            svg.write_text("<svg>  <path/></svg>", encoding="utf-8")
+            out_dir = root / "out"
+            fake_module = mock.Mock()
+            fake_module.optimize = None
+            fake_module.polish = mock.Mock(return_value="<svg><path/></svg>")
+
+            with mock.patch("pptx_image_compress.import_svg_polish_module", return_value=fake_module):
+                out = pic.compress_svg_with_svg_polish(svg, out_dir)
+
+            self.assertEqual(out, out_dir / "vector.svg")
+            fake_module.polish.assert_called_once_with("<svg>  <path/></svg>")
+
+    def test_compress_image_with_routing_does_not_fallback_to_raster_for_svg(self):
+        with tempfile.TemporaryDirectory() as td:
+            root = Path(td)
+            original = root / "vector.svg"
+            original.write_text("<svg></svg>", encoding="utf-8")
+            out_dir = root / "out"
+
+            def fake_compressor(original_path: Path, out_subdir: Path, caesium_threads: int | None, quality: int, min_savings: str):
+                raise AssertionError("Raster compressor must not run for svg")
+
+            with mock.patch("pptx_image_compress.compress_vector_image", return_value=None):
+                out = pic.compress_image_with_routing(
+                    compressor=fake_compressor,
+                    original=original,
+                    out_dir=out_dir,
+                    caesium_threads=1,
+                    quality=90,
+                    min_savings="2%",
+                )
+
+            self.assertIsNone(out)
+
+
+if __name__ == "__main__":
+    unittest.main()