alass

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  "desc": "Automatic Language-Agnostic Subtitle Synchronization",
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  "full_name": "alass",
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  "github_last_commit_at": "2023-12-28T02:07:02Z",
  "github_readme_excerpt": "# Introduction\n\n`alass` is a command line tool to synchronize subtitles to movies.\n\nIt can automatically correct\n\n - constant offsets\n - splits due to advertisement breaks, directors cut, ...\n - different framerates\n\nThe alignment process is not only fast and\naccurate, but also language-agnostic. This means\nyou can align subtitles to movies in different\nlanguages.\n\n`alass` stands for  \"Automatic Language-Agnostic Subtitle Synchronization\". The theory and algorithms\nare documented in my [bachelor\u0027s thesis](documentation/thesis.pdf)\nand summarized in my [bachelor\u0027s presentation](documentation/slides.pdf).\n\n\n## Executable for Windows (64-bit)\n\nGet the latest executable from [here](https://github.com/kaegi/alass/releases)! Just download and extract the archive. The file `alass.bat` is the command line tool.\n\n## Executable for Linux (64-bit)\n\nGet the latest executable from [here](https://github.com/kaegi/alass/releases)! To run the executable, `ffmpeg` and\n`ffprobe` have to be installed.\nYou can change their paths with the environment variables\n`ALASS_FFMPEG_PATH` (default `ffmpeg`) and `ALASS_FFPROBE_PATH` (default `ffprobe`). \n\n## Usage\n\nThe most basic command is:\n\n```bash\n$ alass movie.mp4 incorrect_subtitle.srt output.srt\n```\n\nYou can also use `alass` to align the incorrect subtitle to a different subtitle:\n\n```bash\n$ alass reference_subtitle.ssa incorrect_subtitle.srt output.srt\n```\n\nYou can additionally adjust how much the algorithm tries to avoid introducing or removing a break:\n\n```bash\n# split-penalty is a value between 0 and 1000 (default 7)\n$ alass reference_subtitle.ssa incorrect_subtitle.srt output.srt --split-penalty 10\n```\n\nValues between 5 and 20 are the most useful. Anything above 20 misses some important splits and anything below 5 introduces many unnecessary splits.\n\nIf you only want to shift the subtitle, without introducing splits, you can use `--no-splits`:\n\n```bash\n# synchronizing the subtitles in this mode is very fast\n$ alass movie.mp4 incorrect_",
  "github_repo": "kaegi/alass",
  "github_stars": 1412,
  "github_topics": [
    "algorithm",
    "alignment",
    "api",
    "incorrect-subtitles",
    "subtitle",
    "tool"
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  "homepage": "https://github.com/kaegi/alass",
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  "license": "GPL-3.0-or-later",
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