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sdp: Check that fmt->oformat is non-null before accessing it 

This avoids crashes when avserver tries to create an SDP, since
d77f4af.

CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2014-01-03 15:47:02 +02:00
parent 9d18a7d3ec
commit 82b9799bb2
1 changed files with 1 additions and 1 deletions
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2
libavformat/sdp.c
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@ -402,7 +402,7 @@ static char *sdp_write_media_attributes(char *buff, int size, AVCodecContext *c,
switch (c->codec_id) {
case AV_CODEC_ID_H264: {
int mode = 1;
if (fmt && fmt->oformat->priv_class &&
if (fmt && fmt->oformat && fmt->oformat->priv_class &&
av_opt_flag_is_set(fmt->priv_data, "rtpflags", "h264_mode0"))
mode = 0;
if (c->extradata_size) {