[vlc-devel] Re: Trick mode support for MPEG2 TS

Måns Rullgård mru at inprovide.com
Wed Mar 8 01:59:18 CET 2006

yj <yunjnz at yahoo.com> writes:

> --- Måns Rullgård <mru at inprovide.com> wrote:
>> yj <yunjnz at yahoo.com> writes:
>> > Hi,
>> > I've read the standards, and I got the idea that there
>> > is a byte indicates the frame is I/P/B frame.
>> > but that is for PS format,
>> > how to split I/P/B frame for TS format?
>> There is no indicator of the frame type in either PS or TS.  You
>> have to demux the stream and parse the video elementary stream
>> (that's what 13818-2 describes).  The frame type is given in the
>> picture header, see sections 6.2.3 and 6.3.9 in 13818-2.
> But I found the following sentence in 6.3.9:
> picture_coding_type -- The picture_coding_type
> identifies whether a picture is an intra-coded
> picture(I),
> predictive-coded picture(P) or bidirectionally
> predictive-coded picture(B).
> It seems that the field picture_coding_type is the
> indicator, isn't it?

That is correct.

Måns Rullgård
mru at inprovide.com

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