[FFmpeg-devel] [PATCH v4] lavf/matroskadec: Normalize noncompliant A_QUICKTIME/V_QUICKTIME private data

Mats Peterson matsp888 at yahoo.com
Sat Jan 9 12:02:19 CET 2016

Minor simplification of get_qt_codec(). Description follows:

This patch adds a new static function get_qt_codec() that takes care of 
the initial retrieval of the fourcc and codec ID for A_QUICKTIME and 
V_QUICKTIME. It also normalizes noncompliant private data found in some 
older files that incorrectly starts with the fourcc by 
expanding/shifting the data by 4 bytes, and storing the data size at the 
start. This is necessary in order for the rest of the code in the 
A_QUICKTIME and V_QUICKTIME blocks (and most likely other code as well) 
to correctly parse the private data.


Mats Peterson
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