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Reset RTCP timestamps after seeking, add range start offset to the packets timestamps

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If these aren't reset, the timestamps make a huge jump when the next RTCP
is received.

Originally committed as revision 22918 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Martin Storsjö 2010-04-20 07:38:52 +00:00
parent 2cab6b48ad
commit 5948f82227
3 changed files with 19 additions and 1 deletions
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2
libavformat/rtpdec.c
View File

@ -437,7 +437,7 @@ static void finalize_packet(RTPDemuxContext *s, AVPacket *pkt, uint32_t timestam
delta_timestamp = timestamp - s->last_rtcp_timestamp;
/* convert to the PTS timebase */
addend = av_rescale(s->last_rtcp_ntp_time - s->first_rtcp_ntp_time, s->st->time_base.den, (uint64_t)s->st->time_base.num << 32);
pkt->pts = addend + delta_timestamp;
pkt->pts = s->range_start_offset + addend + delta_timestamp;
}
}

1
libavformat/rtpdec.h
View File

@ -162,6 +162,7 @@ struct RTPDemuxContext {
uint32_t timestamp;
uint32_t base_timestamp;
uint32_t cur_timestamp;
int64_t range_start_offset;
int max_payload_size;
struct MpegTSContext *ts; /* only used for MP2T payloads */
int read_buf_index;

17
libavformat/rtsp.c
View File

@ -1314,6 +1314,7 @@ static int rtsp_read_play(AVFormatContext *s)
{
RTSPState *rt = s->priv_data;
RTSPMessageHeader reply1, *reply = &reply1;
int i;
char cmd[1024];
av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
@ -1330,6 +1331,22 @@ static int rtsp_read_play(AVFormatContext *s)
if (reply->status_code != RTSP_STATUS_OK) {
return -1;
}
if (reply->range_start != AV_NOPTS_VALUE &&
rt->transport == RTSP_TRANSPORT_RTP) {
for (i = 0; i < rt->nb_rtsp_streams; i++) {
RTSPStream *rtsp_st = rt->rtsp_streams[i];
RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
AVStream *st = NULL;
if (rtsp_st->stream_index >= 0)
st = s->streams[rtsp_st->stream_index];
rtpctx->last_rtcp_ntp_time = AV_NOPTS_VALUE;
rtpctx->first_rtcp_ntp_time = AV_NOPTS_VALUE;
if (st)
rtpctx->range_start_offset = av_rescale_q(reply->range_start,
AV_TIME_BASE_Q,
st->time_base);
}
}
}
rt->state = RTSP_STATE_STREAMING;
return 0;