From: EaseTheWorld <easethewo...@gmail.com>
rtsp_st->sdp_payload_type is the first codec in 'm=' tag
st->codecpar->id is the first supported codec in 'a=' tag
the two is not guaranteed to be same for example when
1) the order between attributes is random(rfc4566 doesn't force it)
2) the first codec is same for 'm=' and 'a=' but it is unsupported codec
then st->codecpar->id will be the next one in 'a='(if it's supported)
Signed-off-by: EaseTheWorld <easethewo...@gmail.com>
---
libavformat/rtsp.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index c153cac88b..be3002690e 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -569,6 +569,9 @@ static void sdp_parse_line(AVFormatContext *s,
SDPParseState *s1,
get_word(buf1, sizeof(buf1), &p);
payload_type = atoi(buf1);
rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
+ // parse only sdp_payload_type specified in 'm=' tag
+ if (rtsp_st->sdp_payload_type != payload_type)
+ return;
if (rtsp_st->stream_index >= 0) {
st = s->streams[rtsp_st->stream_index];
sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
@@ -582,6 +585,10 @@ static void sdp_parse_line(AVFormatContext *s,
SDPParseState *s1,
// let dynamic protocol handlers have a stab at the line.
get_word(buf1, sizeof(buf1), &p);
payload_type = atoi(buf1);
+ rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
+ // parse only sdp_payload_type specified in 'm=' tag
+ if (rtsp_st->sdp_payload_type != payload_type)
+ return;
if (s1->seen_rtpmap) {
parse_fmtp(s, rt, payload_type, buf);
} else {
--
2.23.0.windows.1
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