FFmpeg Packaged for Zig

This is a fork of ffmpeg, packaged for Zig. Unnecessary files have been deleted, and the build system has been replaced with build.zig.

There are no system dependencies; the only thing required to build this package is Zig.

Zig API bindings are also provided via the "av" module. See doc/examples for API usage examples.

Differences from Upstream

• Only a single static library is produced. There is no option to create a dynamic library.
• The ffmpeg command line tool is not provided. Perhaps this could be added if desired.
• Documentation, tests, and tools are not provided.
• This package enables everything supported by the target; it does not expose configuration options to choose the set of supported codecs and formats.
• The set of external library integrations is fixed.

External Libraries Included

• libmp3lame
• libvorbis
• libogg

More can be added as desired.

Update Process

These are the instructions to update this package when a new FFmpeg version is released upstream.

1. Merge the new tag into main and resolve all conflicts by replacing the conflicting files with the files from upstream.
2. find libavcodec/ libavdevice/ libavfilter/ libavformat libavutil/ libswscale/ libswresample/ -type f -name "*.asm" -o -name "*.c" -o -name "*.S"
   • Edit to omit files ending in _template.c or _tablegen.c
   • Sort the list
   • Update the all_sources list in build.zig.
3. Inspect the git diff to keep some of the source files commented out like they were before. Some handy filtering rules apply:
   • /L prefix means Linux-only
   • /W prefix means Windows-only
4. Run ./configure --prefix=$HOME/local/ffmpeg --disable-doc --disable-htmlpages --disable-manpages --disable-podpages --disable-txtpages --disable-programs --enable-libmp3lame --enable-libvorbis --disable-shared --enable-static against upstream and diff the generated config.h file to the one generated by this build script. Apply appropriate changes to build.zig.
5. Update these files which are generated by the upstream configure script:
   • config_components.h
   • libavfilter/filter_list.c
   • libavcodec/codec_list.c
   • libavcodec/parser_list.c
   • libavcodec/bsf_list.c
   • libavformat/demuxer_list.c
   • libavformat/muxer_list.c
   • libavdevice/indev_list.c
   • libavdevice/outdev_list.c
   • libavformat/protocol_list.c
6. Update the headers list in build.zig based on what files are present in $HOME/local/ffmpeg/include.