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fftools/ffmpeg: store output packet timebases in the packet 

Useful to keep track of what timebase the packet's timestamps are in.
This commit is contained in:
Anton Khirnov 2023-02-06 13:12:05 +01:00
parent 458ae405ef
commit 6d4f3ae116
2 changed files with 24 additions and 16 deletions
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33
fftools/ffmpeg.c
View File

@ -797,7 +797,7 @@ static void update_video_stats(OutputStream *ost, const AVPacket *pkt, int write
fprintf(vstats_file,"f_size= %6d ", pkt->size);
/* compute pts value */
ti1 = pkt->dts * av_q2d(ost->mux_timebase);
ti1 = pkt->dts * av_q2d(pkt->time_base);
if (ti1 < 0.01)
ti1 = 0.01;
@ -812,7 +812,7 @@ static void enc_stats_write(OutputStream *ost, EncStats *es,
const AVFrame *frame, const AVPacket *pkt)
{
AVIOContext *io = es->io;
AVRational tb = ost->enc_ctx->time_base;
AVRational tb = frame ? frame->time_base : pkt->time_base;
int64_t pts = frame ? frame->pts : pkt->pts;
AVRational tbi = (AVRational){ 0, 1};
@ -912,6 +912,8 @@ static int encode_frame(OutputFile *of, OutputStream *ost, AVFrame *frame)
update_benchmark("%s_%s %d.%d", action, type_desc,
ost->file_index, ost->index);
pkt->time_base = enc->time_base;
/* if two pass, output log on success and EOF */
if ((ret >= 0 || ret == AVERROR_EOF) && ost->logfile && enc->stats_out)
fprintf(ost->logfile, "%s", enc->stats_out);
@ -942,7 +944,8 @@ static int encode_frame(OutputFile *of, OutputStream *ost, AVFrame *frame)
av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, &enc->time_base));
}
av_packet_rescale_ts(pkt, enc->time_base, ost->mux_timebase);
av_packet_rescale_ts(pkt, pkt->time_base, ost->mux_timebase);
pkt->time_base = ost->mux_timebase;
if (debug_ts) {
av_log(ost, AV_LOG_INFO, "encoder -> type:%s "
@ -1103,17 +1106,19 @@ static void do_subtitle_out(OutputFile *of,
}
av_shrink_packet(pkt, subtitle_out_size);
pkt->pts = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->mux_timebase);
pkt->duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, ost->mux_timebase);
pkt->time_base = ost->mux_timebase;
pkt->pts = av_rescale_q(sub->pts, AV_TIME_BASE_Q, pkt->time_base);
pkt->duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, pkt->time_base);
if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
/* XXX: the pts correction is handled here. Maybe handling
it in the codec would be better */
if (i == 0)
pkt->pts += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, ost->mux_timebase);
pkt->pts += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, pkt->time_base);
else
pkt->pts += av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, ost->mux_timebase);
pkt->pts += av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, pkt->time_base);
}
pkt->dts = pkt->pts;
of_output_packet(of, pkt, ost, 0);
}
}
@ -1900,25 +1905,27 @@ static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *p
if (av_packet_ref(opkt, pkt) < 0)
exit_program(1);
opkt->time_base = ost->mux_timebase;
if (pkt->pts != AV_NOPTS_VALUE)
opkt->pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->mux_timebase) - ost_tb_start_time;
opkt->pts = av_rescale_q(pkt->pts, ist->st->time_base, opkt->time_base) - ost_tb_start_time;
if (pkt->dts == AV_NOPTS_VALUE) {
opkt->dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, ost->mux_timebase);
opkt->dts = av_rescale_q(ist->dts, AV_TIME_BASE_Q, opkt->time_base);
} else if (ost->st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
int duration = av_get_audio_frame_duration2(ist->par, pkt->size);
if(!duration)
duration = ist->par->frame_size;
opkt->dts = av_rescale_delta(ist->st->time_base, pkt->dts,
(AVRational){1, ist->par->sample_rate}, duration,
&ist->filter_in_rescale_delta_last, ost->mux_timebase);
&ist->filter_in_rescale_delta_last, opkt->time_base);
/* dts will be set immediately afterwards to what pts is now */
opkt->pts = opkt->dts - ost_tb_start_time;
} else
opkt->dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->mux_timebase);
opkt->dts = av_rescale_q(pkt->dts, ist->st->time_base, opkt->time_base);
opkt->dts -= ost_tb_start_time;
opkt->duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->mux_timebase);
opkt->duration = av_rescale_q(pkt->duration, ist->st->time_base, opkt->time_base);
{
int ret = trigger_fix_sub_duration_heartbeat(ost, pkt);
@ -2475,7 +2482,7 @@ static int fix_sub_duration_heartbeat(InputStream *ist, int64_t signal_pts)
static int trigger_fix_sub_duration_heartbeat(OutputStream *ost, const AVPacket *pkt)
{
OutputFile *of = output_files[ost->file_index];
int64_t signal_pts = av_rescale_q(pkt->pts, ost->mux_timebase,
int64_t signal_pts = av_rescale_q(pkt->pts, pkt->time_base,
AV_TIME_BASE_Q);
if (!ost->fix_sub_duration_heartbeat || !(pkt->flags & AV_PKT_FLAG_KEY))

7
fftools/ffmpeg_mux.c
View File

@ -81,11 +81,12 @@ static int write_packet(Muxer *mux, OutputStream *ost, AVPacket *pkt)
if (pkt->duration > 0)
av_log(ost, AV_LOG_WARNING, "Overriding packet duration by frame rate, this should not happen\n");
pkt->duration = av_rescale_q(1, av_inv_q(ost->frame_rate),
ost->mux_timebase);
pkt->time_base);
}
}
av_packet_rescale_ts(pkt, ost->mux_timebase, ost->st->time_base);
av_packet_rescale_ts(pkt, pkt->time_base, ost->st->time_base);
pkt->time_base = ost->st->time_base;
if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
if (pkt->dts != AV_NOPTS_VALUE &&
@ -325,7 +326,7 @@ void of_output_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int eof)
int ret = 0;
if (!eof && pkt->dts != AV_NOPTS_VALUE)
ost->last_mux_dts = av_rescale_q(pkt->dts, ost->mux_timebase, AV_TIME_BASE_Q);
ost->last_mux_dts = av_rescale_q(pkt->dts, pkt->time_base, AV_TIME_BASE_Q);
/* apply the output bitstream filters */
if (ms->bsf_ctx) {