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Modified to generate PAT/PMT for video keyframes

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This is so that TS fragments produced by
http://code.google.com/p/httpsegmenter/
would be compatible with JW Player.

A new member variable prev_payload_key was added to MpegTSWriteStream
to help detect transition from non-key to key frame, so that
PAT/PMT would not be produced for every keyframe in intra-only videos.

Signed-off-by: Pavel Koshevoy <pkoshevoy@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Pavel Koshevoy 2012-02-10 18:19:08 -07:00 committed by Michael Niedermayer
parent 69494fd5c5
commit 277e52845e
3 changed files with 15 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
libavformat/mpegtsenc.c
View File

@ -211,6 +211,7 @@ typedef struct MpegTSWriteStream {
int cc;
int payload_size;
int first_pts_check; ///< first pts check needed
int prev_payload_key;
int64_t payload_pts;
int64_t payload_dts;
int payload_flags;
@ -589,7 +590,7 @@ static int mpegts_write_header(AVFormatContext *s)
ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
} else {
/* Arbitrary values, PAT/PMT could be written on key frames */
/* Arbitrary values, PAT/PMT will also be written on video key frames */
ts->sdt_packet_period = 200;
ts->pat_packet_period = 40;
if (pcr_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
@ -650,7 +651,7 @@ static int mpegts_write_header(AVFormatContext *s)
}
/* send SDT, PAT and PMT tables regulary */
static void retransmit_si_info(AVFormatContext *s)
static void retransmit_si_info(AVFormatContext *s, int force_pat)
{
MpegTSWrite *ts = s->priv_data;
int i;
@ -659,7 +660,7 @@ static void retransmit_si_info(AVFormatContext *s)
ts->sdt_packet_count = 0;
mpegts_write_sdt(s);
}
if (++ts->pat_packet_count == ts->pat_packet_period) {
if (++ts->pat_packet_count == ts->pat_packet_period || force_pat) {
ts->pat_packet_count = 0;
mpegts_write_pat(s);
for(i = 0; i < ts->nb_services; i++) {
@ -788,10 +789,12 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
int afc_len, stuffing_len;
int64_t pcr = -1; /* avoid warning */
int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
int force_pat = st->codec->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
is_start = 1;
while (payload_size > 0) {
retransmit_si_info(s);
retransmit_si_info(s, force_pat);
force_pat = 0;
write_pcr = 0;
if (ts_st->pid == ts_st->service->pcr_pid) {
@ -961,6 +964,7 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
avio_write(s->pb, buf, TS_PACKET_SIZE);
}
avio_flush(s->pb);
ts_st->prev_payload_key = key;
}
static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)

2
tests/ref/lavf/ts
View File

@ -1,3 +1,3 @@
8f61dad7652abbab9e49fca274dabf30 *./tests/data/lavf/lavf.ts
34f95a300355d474767b436430eba15b *./tests/data/lavf/lavf.ts
406644 ./tests/data/lavf/lavf.ts
./tests/data/lavf/lavf.ts CRC=0x133216c1

10
tests/ref/seek/lavf_ts
View File

@ -8,7 +8,7 @@ ret: 0 st: 0 flags:1 dts: 1.360000 pts: 1.400000 pos: 564 size: 24801
ret: 0 st: 0 flags:1 ts:-0.317500
ret: 0 st: 0 flags:1 dts: 1.360000 pts: 1.400000 pos: 564 size: 24801
ret: 0 st: 1 flags:0 ts: 2.576667
ret: 0 st: 1 flags:1 dts: 2.131433 pts: 2.131433 pos: 403636 size: 209
ret: 0 st: 1 flags:1 dts: 2.131433 pts: 2.131433 pos: 404012 size: 209
ret: 0 st: 1 flags:1 ts: 1.470833
ret: 0 st: 1 flags:1 dts: 1.400000 pts: 1.400000 pos: 172584 size: 208
ret: 0 st:-1 flags:0 ts: 0.365002
@ -16,13 +16,13 @@ ret: 0 st: 0 flags:1 dts: 1.360000 pts: 1.400000 pos: 564 size: 24801
ret: 0 st:-1 flags:1 ts:-0.740831
ret: 0 st: 0 flags:1 dts: 1.360000 pts: 1.400000 pos: 564 size: 24801
ret: 0 st: 0 flags:0 ts: 2.153333
ret: 0 st: 0 flags:0 dts: 2.160000 pts: 2.200000 pos: 325240 size: 12679
ret: 0 st: 0 flags:0 dts: 2.160000 pts: 2.200000 pos: 325616 size: 12679
ret: 0 st: 0 flags:1 ts: 1.047500
ret: 0 st: 0 flags:1 dts: 1.360000 pts: 1.400000 pos: 564 size: 24801
ret: 0 st: 1 flags:0 ts:-0.058333
ret: 0 st: 1 flags:1 dts: 1.400000 pts: 1.400000 pos: 172584 size: 208
ret: 0 st: 1 flags:1 ts: 2.835833
ret: 0 st: 1 flags:1 dts: 2.131433 pts: 2.131433 pos: 403636 size: 209
ret: 0 st: 1 flags:1 dts: 2.131433 pts: 2.131433 pos: 404012 size: 209
ret: 0 st:-1 flags:0 ts: 1.730004
ret: 0 st: 1 flags:1 dts: 1.400000 pts: 1.400000 pos: 172584 size: 208
ret: 0 st:-1 flags:1 ts: 0.624171
@ -30,7 +30,7 @@ ret: 0 st: 0 flags:1 dts: 1.360000 pts: 1.400000 pos: 564 size: 24801
ret: 0 st: 0 flags:0 ts:-0.481667
ret: 0 st: 0 flags:1 dts: 1.360000 pts: 1.400000 pos: 564 size: 24801
ret: 0 st: 0 flags:1 ts: 2.412500
ret: 0 st: 1 flags:1 dts: 2.131433 pts: 2.131433 pos: 403636 size: 209
ret: 0 st: 1 flags:1 dts: 2.131433 pts: 2.131433 pos: 404012 size: 209
ret: 0 st: 1 flags:0 ts: 1.306667
ret: 0 st: 1 flags:1 dts: 1.400000 pts: 1.400000 pos: 172584 size: 208
ret: 0 st: 1 flags:1 ts: 0.200844
@ -44,7 +44,7 @@ ret: 0 st: 0 flags:1 dts: 1.360000 pts: 1.400000 pos: 564 size: 24801
ret: 0 st: 0 flags:1 ts:-0.222489
ret: 0 st: 0 flags:1 dts: 1.360000 pts: 1.400000 pos: 564 size: 24801
ret: 0 st: 1 flags:0 ts: 2.671678
ret: 0 st: 1 flags:1 dts: 2.131433 pts: 2.131433 pos: 403636 size: 209
ret: 0 st: 1 flags:1 dts: 2.131433 pts: 2.131433 pos: 404012 size: 209
ret: 0 st: 1 flags:1 ts: 1.565844
ret: 0 st: 1 flags:1 dts: 1.400000 pts: 1.400000 pos: 172584 size: 208
ret: 0 st:-1 flags:0 ts: 0.460008