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lavf: check that the context to avformat_open_input() is valid. 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-04-18 13:49:07 +02:00
parent abe6330317
commit 9f39d3d190
1 changed files with 4 additions and 0 deletions
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4
libavformat/utils.c
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@ -589,6 +589,10 @@ int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputForma
if (!s && !(s = avformat_alloc_context()))
return AVERROR(ENOMEM);
if (!s->av_class){
av_log(0, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
return AVERROR(EINVAL);
}
if (fmt)
s->iformat = fmt;