Which should I use: MP4 muxer or MP4v2 muxer? Thank you
1) Use the latest nightly (https://avidemux.org/nightly/).
2) Use MP4 muxer.
libmp4v2-based "MP4v2" muxer is obsolete and deprecated, opposite to supported and actively developed libavformat-based "MP4" muxer.
Thank you