[Live-devel] Playing streams received with -r option

Ross Finlayson finlayson at live555.com
Fri Oct 19 06:40:14 PDT 2007


>I tried to play the stream using openRTSP as receiving instrument
>and now I'm a bit puzzled about this.
>I tried the following:
>$ openRTSP -r -p 5000 rtsp://172.16.200.54/ &
>$ vlc --demux=m4v udp://@:5000
>
>Video source is AXIS IP camera.
>I see video but it looks awfully blurred.
>
>Funny that if I try
>$ vlc rtsp://172.16.200.54
>it plays quite well.
>And if I try to play video fully captured by openRTSP it plays well.
>
>The same when I try to play it with ffplay.
>Again video stream is awfully blurred and there is a stream of errors
>on console.
>
>Hence, the question: why is that?
>Can this be linked with not sending back RTCP Reception Reports?

That's unlikely.

>Or maybe there are not enough parameters for vlc/ffplay to play this
>stream?

That's my best guess, especially if the stream is MPEG-4 or H.264 
video.  Is there a string of the form
	a=fmtp: ... config=...
in the stream's SDP description?  If so, then that 'config' 
information may need to be passed to the media player, in order for 
it to play the stream properly.
-- 

Ross Finlayson
Live Networks, Inc.
http://www.live555.com/


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