[Openquicktime-devel] Fix for MJPEG encoding with audio

[Jean-Francois P. <pan...@co...>]

If you try to use oqtencoder to encode mjpa with audio, the resulting 
.mov will not play in the Apple QuickTime player. The problem seems to 
come from codec_mjpeg.c: when the code tries to set the "fields" and 
"field_dominance" properties for the track, it gets confused between the 
list of all tracks in the movie (file->moov.trak[]) and the list of 
video-only tracks (file->vtracks[]) and it ends up setting these 
properties on the audio rather than the video track.

The patch attached to this mail changes decode_MJPA() and encode_MJPA() 
to make sure that the fields and field_dominance properties are 
read/written to the right video track. With this change, I was able to 
use oqtencoder to generate mjpa+audio movies which QT 6.5.1 is happy with.

JF