[vlc] Re: VLC and RTP/RTSP

[Derk-Jan Hartman]

On 20 mei 2004, at 16:20, Cavalera Claudio wrote:
>> On 20 mei 2004, at 09:40, Cavalera Claudio wrote:
>>> Does VLC decode MPEG4 video and MPEG4 AAC when reading rtp
>>> streams? I don't understand well the tables on
>>> http://www.videolan.org/streaming/features.html
>>
>> It does. The features mentioned on the page above only concern
>> serving.
>
> Sorry, it was my fault.
> I've now verified streaming of RTP/UDP of MPEG4 video and MPEG4 AAC,
> opening an RTSP URL both with vlc071 and vlc072-pre3.

good.

>> Receiving is described on http://www.videolan.org/vlc/features.html
>
> So I must assume that VLC is able to play in a stream any codec which
> has "YES" on this page, when encapsulated in RTP/UDP according to
> corrispondent RFCs?

Read like this: You want to stream via RTP. You can then only use RAW 
as muxing method.
Next table specifies that only MPEG 1,2,4 and MPGA, MP3, AC3 and FLAC 
can be used in this case.

>> This table appears to be confusing.
>> What is meant is Output Type vs. Muxing.
>> So via UDP you can only mux TS and Raw, and you can only mux mp4 to a
>> file (mp4 is not streamable (RTSP MPEG4 is not mp4 unlike many
>> will led
>> you to believe))
>>
>
> What do you mean with "RTSP MPEG4"? The definition of RFC 3550?
> I've successfully streamed mp4 files (hinted) more than once.
> Thanks a lot,
> Claudio

hinted Video on Demand yes. but that's no live streaming. you can't 
just drop in the middle of a mp4 file stream and start watching. You 
always need to start at the beginning (where the hinting is done) to 
view the file. For true live streaming you should use RTSP/RTP which 
will send raw streams instead of a mp4 file over the network (even 
though the rtsp links show the .mp4 extension, you don't actually send 
the .mp4 file).

> PS=What about AMR Audio? :-)

VLC currently doesn't support it.

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>
----
Universiteit Twente
Derk-Jan Hartman (d.hartman at student.utwente dot nl)
http://home.student.utwente.nl/d.hartman

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