[streaming] Re: MP4V over MP2TS

[Laurent Aimar]

On Wed, May 07, 2003, Miguel Barreiro Paz wrote:
> I'm quite impressed by the videolan evolution in the past months :)
 Thanks,

> I've been playing a bit today with vlc streaming of both MPEG2 program
> streams and AVI files containing MPEG-4 video and MP3 audio. It took me a
> while to realize the UDP network protocol used is in fact a MPEG-2
> Transport Stream encapsulating the elementary streams :-) Is it documented
> anywhere?
  Yes, it's the amendment 7 of ISO 13818-1 that specify how to put MPEG-4
audio and video into MPEG2-TS. I have tried to follow it but I know that
I've mis-implemented it  (mainly because I have only a draft with some
errors) and I need somes samples/other player too test compatibility.

> Specifically, as far as I can tell (dumb hand-made analyzer program) the
> PAT is not standard.
 It should, mainly there is new stream type/id and new descriptors. Perhaps
there are some bugs, if you could give more details I will try to fix them.

> Related to these issues, is there any specific reason why certain
> specific PIDs (16, 17...) are used? (DVB reserves these PIDs for system
> tables).
 No, but are you sure that thoses PID are reserved ? I think that in
ISO 13818-1, only 0x0(pat), 0x01(cat) 0x02->0x0f and 0x1fff(null packet)
are reserved.

-- 
fenrir
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