I have added muxing to my gpl viewer and found some issues.
With saving vcodec mpeg4, acodec libmp3lame, my video works fine and
audio is in sync.
However the audio (without any sound) extends past the video for several
hundred frames. The flushing of the audio seems to create this. If I
don't flush the audio (calling multiple times avcodec_encode_audio2 with
the NULL pointer), I get missing audio.
When playing back the resulting video sometimes (and only sometimes)
ffmpeg complains (multiple times):
Trying to remove 1839 samples, but the queue is empty
1839 samples is exactly the size of a AVCodecContext->frame_size
(src_nb_samples).
I was wondering if someone saw this before or if someone has an idea on
how to debug the problem of the audio extending too far.
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