[Live-devel] WMV RTSP support for openRTSP

[Ross Finlayson]

At 09:08 PM 12/5/04, you wrote:
>Hi all,
>         I wonder if openRTSP works well with Windows Media Server 9 .  I 
> attempted to receive stream data by " ./openRTSP -s 0 
> -t  rtsp://192.168.10.218/test.wmv "

This is correct.  (You could also try streaming via UDP - i.e., without the 
"-t" option - although that probably won't make any difference.)

>  ,and I got  three files , audio-X-ASF-PF-1, application-X-WMS-RTX-2 and 
> video-X-ASF-PF-3. Unfortunately, the video file was empty.

That means that no RTP packets for the video stream were sent at all.  I 
don't know why, but perhaps Microsoft requires their own proprietary 
extension to RTSP in order to get this data??  There does not seem to be a 
problem with "openRTSP".

Another thing you could try is to ask *only* for the video stream:
         ./openRTSP -s 0 -v rtsp://192.168.10.218/test.wmv > video.out
(Perhaps also add the "-t" option (for TCP streaming) and the "-V" option 
(to get verbose debugging output).)  If you do this, the file "video.out" 
will end up with any video stream data that you receive.

>Why there were unknow errors?

Those errors occurred because there was a problem with IP multicast on your 
computer.  Fortunately, it did not cause a major problem for "openRTSP" 
(because the stream that it was trying to read used unicast, not multicast).

>Should I subclass a special  RTPsource for mime type X-ASF-PF rather than 
>using SimpleRTPSource?

That won't help.  You are not receiving video stream data in any 
case.  (Also, you would need to know the RTP payload format that Microsoft 
uses for the "video/X-ASF-PF-3" MIME type.  I don't know if this is 
documented anywhere.

Unfortunately, in general you just cannot expect Microsoft software to be 
standards compliant.


	Ross Finlayson
	LIVE.COM
	<http://www.live.com/>