[streaming] Re: create 3gp compliant content with vlc

[Torben Knerr]

Cavalera Claudio wrote:

>
>I've not read the linked mail (eheh too lazy I am :)
>  
>
Indeed it was the provider (Eplus_DE) who blocked RTP packets somewhere,
as they didn't arrive at my device!
I've tested the streams with in T-Mobile_DE GPRS network with the same 
device
and it worked well!
So maybe the list of RTSP-friendly newtork operators may be a helpful 
resource for
anyone, trying to stream to a mobile phone, hence again the link:
http://lists.apple.com/archives/streaming-server-users/2005/Mar/msg00191.html

I've also setup a small html page with links to the streams i've tested. 
there is also
a form to send feedback if the streams worked or not on your device.
feel free to test those streams! feedback through the form would be highly
appreciated, if some people test it i can post the results in this list.

here's the url: http://141.28.227.78/test.jsp

>It is possible, but if this is the case I think the buffering in Nokia
>6630 should always stay at 0% and you should not see any RTCP Receiver
>Reports arriving at Darwin Server from Nokia 6630.
>
I received some UDP packages from 6630 after a while, but according to 
Etherreal they don't
seem to be RTCP RR (not even RTCP) packages. Don't know what they were, 
but doesn't
really matter since it was a provider problem and works now.


>>
>>I know of other 3gp players, such as Philips Platform4 Player for 
>>PocketPC, who start playing only after
>>having received a RTCP Sender Report from the server.
>>    
>>
>
>If that is the case, too bad! However in my experience I've found that
>players don't really care about RTCP Sender Reports, despite what often
>stated. 
>
I agree, seems that this is a Philips Platform4 Player specific issue. 
have not seen this behaviour with other players.

>
>Torben maybe you can also try having a look at
>http://www.catrasoftware.it/Streaming/CatraStreamingPlatform.htm
>
>  
>
GREAT! I've heard about this, but never found it through google, only 
some dead links.
Again, there was something pretty good hidden :)

>
>I've found also that some players (maybe Packet Video Player) want a
>particular RTCP Packet at the beginning. They send a RTCP packet to the
>server and want it back, otherwise they'll hang or give errors. I think
>I've also tried sending this packet full of 0s, it worked, while not
>sending it did not work.
>I'm sure with netcat you can do good tricks here, try send back to Nokia
>the first RTCP Packet you receive or things like that :-)
>  
>
maybe thats what Philips Platform4 Player wants... i'll try

>  
>
>>Another big problem is that i'm not able to encode a mp4 file
>>with vlc 
>>which will play on Nokias realplayer.
>>They (Nokia) state that they support only 3gp compliant mp4 
>>files, so I 
>>think vlc is not really 3gp compliant,
>>which makes me doubt even more that the streaming thing is possible..
>>    
>>
> 
>This is almost surely a file format issue not a codec issue.
>When you stream the file format must be supported by the streaming
>server, not the player.
>  
>
right, its a file format issue. the mp4 format produced by vlc is not 
3gp compliant (doesn't play
(local playback - not streaming) on my 6630 nokia device), and you can't 
mux into 3gp format
with VLC. I use ffmpeg now to produce mp4 and 3gp files, they are 
already working for local
playback. to stream them with darwin, you have to add hint tracks. you 
may use MP4Box from
the gpac.sourceforge.net project for this task, then they will be 
streamed by darwin.

>Don't give up! :-)
>Claudio
>
>  
>
Thank you very much for your extensive help!

Best wishes,
Torben

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