[Ffmpeg-devel] Mpeg2-ts encoder uses fixed PES payload size

Michael Niedermayer michaelni
Sun Mar 4 20:48:00 CET 2007


On Sun, Mar 04, 2007 at 01:33:23PM +0000, M?ns Rullg?rd wrote:
> Michael Niedermayer <michaelni at gmx.at> writes:
> > Hi
> >
> > On Sat, Mar 03, 2007 at 07:06:39PM +0100, Luca Abeni wrote:
> >> Hi all,
> >> On Sat, 2007-03-03 at 18:56 +0100, Luca Abeni wrote:
> >> [...]
> >> > Ok, here is the patch. 
> >> [...]
> >> Sorry, I sent a wrong patch. Here is the correct one.
> >
> > i would prefer if the sdt placement frequency could be selected by the
> > user instead of haveing a dummy muxer which doesnt place SDTs
> > but mans is maintainer not me so its his decission ...
> >
> > if the placement becomes user selectable then we also must decide
> > about  the units of the new parameter (sdt per time vs. sdt per
> > bits) without looking at the mpeg spec i would guess per time is
> > more correct
> With a quick glance at the DVB specs, all I find about SI repetition
> rates is a minimum interval of 25ms between repetitions.
> BTW, why do we generate SDT at all?  It is a DVB extension, and would
> only be useful to someone creating a transport stream for broadcast,
> for which purpose the current lavf ts muxer is useless.  A proper DVB
> transport stream also needs the other DVB SI tables, which we do not
> create.

well you are our mpeg (de)muxing expert and maintainer ...

also it seems the SDT stuff has been there since the initial checkin of
mpegtsenc.c so i fear only fabrice knows why its there ...

ive no objections to simply disabling it if you say its useless ...

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The educated differ from the uneducated as much as the living from the
dead. -- Aristotle 
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