[FFmpeg-devel] [PATCH v3] lavf/matroskadec: Set A_QUICKTIME bit depth

Mats Peterson matsp888 at yahoo.com
Fri Jan 15 13:06:17 CET 2016

FFmpeg curiously uses 'sowt' as the fourcc when writing 8-bit signed 
QuickTime data, so cater for this as well. Description follows:

Since mkvmerge doesn't set the bit depth for A_QUICKTIME audio (as far 
as I know), the track->audio.bitdepth variable will be zero, and its 
value needs to be retrieved from the sound sample description. Also, 
confine the 0x00000000 to 'raw '/'twos' fourcc mapping to old version 0 
sound sample descriptions, since they are the only valid sample 
descriptions for this type of mapping.

Also, 'twos' and 'sowt' audio can be signed 8-bit.

Mats Peterson
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