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

[Anders Nilsson]

Thanks for the info,

I'll continue playing around with VLC to see if I can get anything to work. 

The only program I've seen out there creating mp4 files that works on my UIQ
2.0/Symbian OS 7.0 cell is:

http://www.mpegable.com/show/mpegablex4.html

Is there a way to force QSIF transcodes in VLC? This seams to be a 'must'
for cellphone transcodes.

Thanks again.

/Anders. 

-----Original Message-----
From: vlc-bounce at videolan.org [mailto:vlc-bounce at videolan.org] On Behalf Of
Benjamin PRACHT
Sent: den 28 oktober 2004 15:07
To: vlc at videolan.org
Subject: [vlc] Re: Using VLC to trancode media for cellphones.

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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