[vlc] Re: Using VLC to trancode media for cellphones.

[Benjamin PRACHT]

On Thu, Oct 28, 2004, Anders Nilsson wrote :
> Sigmund,
> 
> I'm trying to use the built in player that comes with the motorola A925
> phone, and there is no information about version aso.
> 
> I know it supports .3gp files and .mp4 files but I don't know what level of
> mpeg-4 or how it has to be muxed.
> 

I only have little knowledge of the 3gp norm, bu I think it is stored in
a "mp4" (the same Apple uses) container when stored as file. I think
RTP/RTSP is used for streaming. VLC should support RTP/RTSP streaming.
However, I don't think this has already been tested with a phone. As
RTSP is kinda under normalized, it is possible some coding will be
required for a proper support. Another thing is that I'm not sure VLC
can send AMR over RTP. AAC should be all right.

VLC-0.8.0 should be able to transcode/rescale/lower the framerate of the
stream in real time. transcoding to MAR is not suppoted. MPEG4 and AAC
are.

> .3gp files kinda sukks since the maximum framerate is 15 fps (from what I've
> seen) and the audio is encoded at 12 kbps mono (AMR). So .3gp files is ruled
> out for my application. 
> 
> I'm sorry that I can't provide you with more information and I have not seen
> any other 'free' players for Symbian UIQ so I can't even give you any
> pointers.
> 
> I beleve that the p800/p900 requires the same type of format as the motorola
> A925 and this is what I see when reading the specs for p900.
> 
> http://my-symbian.com/uiq/techdata_p900.php
> 
> Video coding: MPEG-4 Simple Visual Profile Level 0, H263 Profile 0 Level 10,
> H263 Profile 3 Level 10 
> Audio coding: AAC, AMR
> 
> /Anders. 
-- 
BigBen

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