From 6f36eb0da71d22aadf8f056f0966bd86656ea57e Mon Sep 17 00:00:00 2001 From: Limin Wang Date: Mon, 26 Oct 2020 18:31:07 +0800 Subject: [PATCH] avformat/mpegtsenc: make first_pcr sync with the first valid dts now first_pts assume dts will start from zero, if it's not true(copyts is enable), too many null packet will be inserted for cbr output. Please test with below command, you'll get huge test.ts without the patch: ./ffmpeg -y -copyts -i ../fate-suite/mpegts/loewe.ts -c:v libx264 -x264opts \ nal-hrd=cbr:force-cfr=1 -b:v 3500k -minrate 3500k -maxrate 3500k -bufsize \ 1000k -c:a mp2 -muxrate 4500k -vframes 1000 test.ts Reviewed-by: Marton Balint Signed-off-by: Limin Wang --- libavformat/mpegtsenc.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/libavformat/mpegtsenc.c b/libavformat/mpegtsenc.c index 5c97d63ffd..29dcaf6bec 100644 --- a/libavformat/mpegtsenc.c +++ b/libavformat/mpegtsenc.c @@ -81,6 +81,7 @@ typedef struct MpegTSWrite { int64_t pat_period; /* PAT/PMT period in PCR time base */ int nb_services; int64_t first_pcr; + int first_dts_checked; int64_t next_pcr; int mux_rate; ///< set to 1 when VBR int pes_payload_size; @@ -1688,6 +1689,11 @@ static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt) stream_id = side_data[0]; if (ts->copyts < 1) { + if (!ts->first_dts_checked && dts != AV_NOPTS_VALUE) { + ts->first_pcr += dts * 300; + ts->first_dts_checked = 1; + } + if (pts != AV_NOPTS_VALUE) pts += delay; if (dts != AV_NOPTS_VALUE)