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Re: [MSE] transport stream constraints vs Apple's HLS

From: Cyril Concolato <cyril.concolato@telecom-paristech.fr>
Date: Fri, 22 Feb 2013 14:22:37 +0100
Message-ID: <5127711D.6030407@telecom-paristech.fr>
To: public-html-media@w3.org
Hi Gary,

A small question/comment regarding one of your statements:

Le 05/02/2013 17:49, Gary Hughes a écrit :
> [GH] While 13818-1 does not require any specific PES alignment other 
> than at signaled discontinuities or random access points, many 
> derivative specifications, such as those from SCTE, DVB, DLNA do 
> require that AVC AUs be aligned with PES packets. Transport stream 
> encoders that support cable or IPTV environments will have an option 
> to produce PES aligned streams, one AU per PES at least for video.
DVB [1] only says that alignment *may* be used. And from what I've seen, 
typical Digital Terrestrial TV streams, at least in France, do *not* use 
the data alignment in PES packets for AVC streams. Requiring that MSE 
MPEG-2 TS Segments use it would preclude being able to reuse these DTTV 
streams as is.

[1] 
http://www.etsi.org/deliver/etsi_ts/101100_101199/101154/01.09.01_60/ts_101154v010901p.pdf

-- 
Cyril Concolato
Maître de Conférences/Associate Professor
Groupe Multimedia/Multimedia Group
Telecom ParisTech
46 rue Barrault
75 013 Paris, France
http://concolato.wp.mines-telecom.fr/
Received on Friday, 22 February 2013 13:23:00 UTC

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