‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Tuesday, 23 de April de 2019 14:20, Moritz Barsnick <barsn...@gmx.net> wrote:
> On Tue, Apr 23, 2019 at 12:03:11 +0000, Andreas Håkon wrote:
>
> > In addition, one correction regarding the initialization.
> > Sorry, but first version has an error. This is clean!
>
> I had seen that the option got initialized to 0x0000, but checked that
> that is never a legally assigned pid (there's a "< 16" check
> somewhere), so figured it would be okay as a default.
>
> > ts_st->discontinuity = ts->flags & MPEGTS_FLAG_DISCONT;
> >
> >
> > - /* update PCR pid by using the first video stream */
> >
> >
> > - if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
> >
> >
> > - service->pcr_pid == 0x1fff) {
> >
> >
> >
> > - /* update PCR pid by: forced pid or using the first video stream
> > */
> >
> >
> > - if ((ts->pcr_forced_pid != 0x0010 && ts_st->pid ==
> > ts->pcr_forced_pid) ||
> >
> >
> > - (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
> > service->pcr_pid == 0x1fff)) {
> > service->pcr_pid = ts_st->pid;
> >
> >
>
> Okay if pid 0x0010 shall actually never carry the PCR. (Probably
> 0x0010-0x001F if I guess by Wikipedia's list of PIDs properly, but
> then, the article isn't very well written for my understanding, and I
> have no idea about PIDs.)
Hi Moritz,
Pids 0x00-0x10 (0-16 in decimal values) are reserved. So pid 0x10 can't carry
PCR marks.
Then I use this value as the "empty" (aka NOT_SET) value for the parameter. In
this case the
default behaviour is used: that's auto-select first video, or first stream if
no video.
Regards.
A.H.
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