streaming guru needed
Julian Elischer
julian at elischer.org
Wed May 9 23:24:31 UTC 2007
Danny Pansters wrote:
> On Wednesday 09 May 2007 21:03:35 Stefan Ehmann wrote:
>> On Wednesday 09 May 2007 02:45:13 Julian Elischer wrote:
>>> Julian Elischer wrote:
>>>> So, to continue on the topic of my last email,
>>>> I'll be webcasting from BSDCan and teh FreeBSD devsummit that is with
>>>> it. however I'll be using my Mac because I've used it before
>>>> and I don't have time to experiment.. (Hey it's BSD ok?)
>>>>
>>>> I'm currently (and often) broadcasting a test stream at
>>>> rtsp://jello.ironport.com:80/Bsdtest.sdp
>>>>
>>>>
>>>> I do have several questions.
>>>>
>>>> 1/ what is the best protocol/codec/etc.
>>>> I'm currently using mpeg-4 audio and video .. is that ok?
>>>> also for ease of coping with firewalls I'm using RTP over RTSP (I
>>>> think that's right) on port 80 though others might work....?
>>>>
>>>> 2/ does anyone know how to get mplayer to show this stuff?
>>>>
>>>> 3/ people have had success using VLC. does anyone have an
>>>> definative description of how to set it up to work?
>>> I have been told to use:
>>> Preferences -> check Advanced, go to Input/Codecs->Demuxers->RTP/RTSP
>>> and check "Use RTP over RTSP (TCP)"
>> For mplayer "-rtsp-stream-over-tcp" seems to be the equivalent (It works
>> for me at least).
>>
>
> Just for the record, you may already know this. (from long time ago when I had
> a more than healthy interest in RealVideo) Rtsp is preferably used over UDP
> (that is the A/V data) together with a control "channel" over TCP for the
> play/pause/feedback sort of things. So "rtsp over tcp" will be (very)
> suboptimal as there needs to be confirmation of every datagram. If it's also
> possible to send the a/v stream over UDP and to play it you'd rather use
> that.
thanks..
Will that make it more robust?
the problem is firewalls.
what ports need to be opened to the server to allow
1/ the optimal broadcaster (me at BSDCan)
2/ the optimal client (people wanting to attend remotely)
3/ forwarding the session to a relay if the original server gets to full.
>
> Dan
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