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avformat/webmdashenc: Require the 'adaptation_sets' option to be set

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This seems to be non-optional, and if the muxer is run without it,
strlen() is run on NULL, causing a segfault.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit cbd3a68f3e1c2d1679370301eb5e1a32a2df64fe)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Derek Buitenhuis 2017-04-20 13:14:42 +01:00 committed by Michael Niedermayer
parent 3fd8e79dc9
commit 436f1d4562
1 changed files with 4 additions and 0 deletions
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4
libavformat/webmdashenc.c
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@ -428,6 +428,10 @@ static int parse_adaptation_sets(AVFormatContext *s)
char *p = w->adaptation_sets;
char *q;
enum { new_set, parsed_id, parsing_streams } state;
if (!w->adaptation_sets) {
av_log(s, AV_LOG_ERROR, "The 'adaptation_sets' option must be set.\n");
return AVERROR(EINVAL);
}
// syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
state = new_set;
while (p < w->adaptation_sets + strlen(w->adaptation_sets)) {