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matroskadec: Ensure time_scale is nonzero, fixes divide-by-zero if the file

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Based on a Chromium patch

Originally committed as revision 23167 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
David Conrad 2010-05-18 21:21:28 +00:00
parent 1c664b239c
commit d98bd80ed3
1 changed files with 2 additions and 0 deletions
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2
libavformat/matroskadec.c
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@ -1154,6 +1154,8 @@ static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
return -1;
matroska_execute_seekhead(matroska);
if (!matroska->time_scale)
matroska->time_scale = 1000000;
if (matroska->duration)
matroska->ctx->duration = matroska->duration * matroska->time_scale
* 1000 / AV_TIME_BASE;