On Tue, Nov 02, 2021 at 05:36:37PM +0200, Maksym Veremeyenko wrote:
> On 02.11.2021 16:59, lance.lmw...@gmail.com wrote:
> [...]
> > > + if (!ts->first_dts_checked && dts != AV_NOPTS_VALUE) {
> > > + ts->first_pcr += dts * 300;
> > > + ts->first_dts_checked = 1;
> > > + }
> > > +
> >
> > I think it's not same as the old code, the first_pcr will add extra delay
> > if copyts is
> > 0.
> >
>
> proposed patch extend updating ts->first_pcr not only when copyts is 0 but
> when copyts is 1 (*-mpegts_copyts 1* specified)
>
> very similar issue i found at
> http://ffmpeg.org/pipermail/ffmpeg-devel/2019-April/242766.html
>
I mean you need move the code before if (ts->copyts < 1) { instead of after.
try with below command:
./ffmpeg -y -copyts -i http://samples.ffmpeg.org/MPEG2/foxksaz.ts -c:v libx264
-x264opts nal-hrd=cbr:force-cfr=1 \
-b:v 3500k -minrate 3500k -maxrate 3500k -bufsize 1000k -c:a mp2 -f mpegts \
-mpegts_copyts 0 -muxrate 4500k -vframes 1000 test.ts
You'll get some "dts < pcr, TS is invalid" message.
> --
> Maksym Veremeyenko
>
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--
Thanks,
Limin Wang
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