[Ffmpeg-devel] realmedia file format

Måns Rullgård mru
Tue Jun 7 23:03:24 CEST 2005

Mike Melanson <mike at multimedia.cx> writes:

> M?ns Rullg?rd wrote:
>> Does anyone here know of a complete specification of the realmedia
>> file format?  There's a partial one on multimedia.cx, and a slightly
>> different version of the same document is available on the helixplayer
>> site.  Both of these are missing information on the special treatment
>> video packets seem to require, judging from lavf source code.
>> Obviously, someone knows how to do it...
> 	RealMedia is another of those "open" formats-- like QuickTime
> 	and RTSP and CORBA-- that are infinitely extensible. They are
> 	designed to be "open" standards that comfortably transport
> 	proprietary data.

Tell me about it...

> 	My point is that understanding the general outline of the RM
> 	format is not enough-- the interesting stuff is what they do
> 	with their own proprietary stuff inside. I would like to
> 	document this based on what various projects have reverse
> 	engineered... but I just can not build up that much enthusiasm
> 	for Real's stuff.

I'd rather not be bothered with it either.  Unfortunately, I sometimes
come across files in that format that I wouldn't mind playing.
Realplayer is completely useless (displays 10 frames every 2 seconds),
so I guess my only hope is to cook something up myself using the
codecs from realplayer.

M?ns Rullg?rd
mru at inprovide.com

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