ffmpeg.js Requests for new filter/decoder/etc

Please comment if you need some ffmpeg feature not currently available in npm builds. I'm considering two options: make one build with all features included (#26) or add those features to normal builds.

Demuxers

[x] matroska
[x] ogg
[x] mov
[x] mp3
[x] wav
[x] image2
[x] concat

Decoders

[x] vp8
[x] h264
[x] vorbis
[x] opus
[x] mp3
[x] aac
[x] pcm_s16le
[x] mjpeg
[x] png
[ ] mpeg2video
[ ] hevc
[ ] gif

Filters

[x] aresample
[x] scale
[x] crop
[x] overlay
[x] hstack
[x] vstack
[ ] palettegen
[ ] paletteuse
[ ] setpts

Encoders

[ ] gif
[ ] mjpeg
[ ] png

Apr 29 '20 09:04 Kagami

Gif support would be a typical feature ffmpeg is used for (e.g. transcode a video to gif).

Apr 29 '20 09:04 tpetry

A use case for ffmpeg.js is to transcode videos in the browser for privacy reason. One can transcode videos that are not playable in the browser to webm, or extract video screenshot and save as jpg. Basically, ffmpeg.js extents the browser's video processing capabilities beyond those enabled by the html5 video and/or canvas tags.

It would be helpful if ffmpeg.js can support as much decoders as possible. At the very least, hevc and mpeg2video decoders should be included (*.mkv and *.avi videos are still quite common). Perhaps we can have an all inclusive build, a maximum decoders support build, a maximum filters support build, and a js file size optimized build?