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  "markdown": "Upstream documentation tells you what a parameter means; tutorials teach a workflow. Read the\ndocumentation for the release you actually run, because a `master` or `latest` page can describe\ndifferent defaults from your build.\n\n## Specifications and upstream tool documentation\n\n| Reference                                                     | Useful for                                                                                               |\n| ------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------- |\n| [ITU-T H.273](https://www.itu.int/rec/T-REC-H.273)            | Color-signaling code points. The in-force edition is 07/24.                                              |\n| [FFmpeg manuals](https://ffmpeg.org/documentation.html)       | Stream selection, encoders, filters, formats, and ffprobe. Your build's `-h` output lists what it actually includes. |\n| [x265 documentation](https://x265.readthedocs.io/en/master/)  | Native x265 CLI/API controls and release notes. FFmpeg's wrapper is a separate interface.                |\n| [VapourSynth documentation](https://www.vapoursynth.com/doc/) | Core and Python APIs. External plugin dependencies are separate.                                         |\n| [Xiph.Org documentation](https://xiph.org/)                   | Opus, Vorbis, FLAC, Theora and Ogg project pages.                                                        |\n\nEach tool page on this wiki ends with a full option table; [Reading option tables](/reference/encoder-parameters/)\nlists them.\n\n## Community workflows\n\n- [Fansubbing Guide](https://guide.encode.moe/) covers fansubbing, filtering, resampling and\n  encoding. Its introduction says it is still under construction, so check individual examples and\n  dependency versions.\n- [SilentAperture's Advanced Encoding Guide](https://silentaperture.gitlab.io/mdbook-guide/introduction.html)\n  covers source preparation, filtering and test encodes for high-quality encodes.\n- [lvsfunc documentation](https://lvsfunc.encode.moe/en/latest/) describes VapourSynth helper\n  functions. The project warns that its public API may change at any time, so pin a package version\n  for reproducible scripts.\n- [Kokomins' anime/x265 article](https://kokomins.wordpress.com/2019/10/10/anime-encoding-guide-for-x265-and-why-to-never-use-flac/)\n  walks through x265's psychovisual options (`psy-rd`, `psy-rdoq`, AQ, deblocking, `no-sao`) for\n  anime. It dates from 2019, so check its values against current x265 defaults.\n\nThe old third-party [x264 settings summary](http://www.chaneru.com/Roku/HLS/X264_Settings.htm) still\nexplains many options well but is not maintained; use [the x264 page](/tools/software-encoders/x264/)\nand `x264 --fullhelp` for current values.\n"
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