avformat/mvdec: make audio stream conditional

Only allocate an audio stream if there is one in the data.  Silicon
Graphics movie format will contain default values (16 bit samples, 2
audio channels, 22050 Hz sample rate) even when no audio is present in
the file.  This confuses FFmpeg into thinking such an audio stream is
present with 0 samples in it.

There is a flag value in the format to indicate whether or not audio is
present.  This patch checks that and behaves accordingly.

Signed-off-by: John-Paul Stewart <[email protected]>
Reviewed-by: Andreas Rheinhardt <[email protected]>
Reviewed-by: Peter Ross <[email protected]>

0 files changed, 0 insertions, 0 deletions