[Live-devel] openrtsp, ffmpeg, and poor H.261 video

[peter green]

Hello again,

I'm including the text from my original post to this list in hopes that
there might be an answer for what I'm seeing.  In addition, I'd like to play
the raw H.261 stream that openRTSP outputs to see if the problem lies in the
stuff openRTSP is reading/writing or if the problem is with ffmpeg.  But I
can't find a player that will deal with a raw H.261 stream.

Any ideas on any of this?  Thanks for the help!

/pg
-- 
Peter Green : Agathon Group : pcg at agathongroup.com

* peter green <pcg at agathongroup.com> [070403 17:21]:
> I'm pulling from a Darwin Streaming Server that is broadcasting an SDP from
> a Polycom VSX7000e video teleconferencing thing.  I've been able to use
> openrtsp to dump the H261 packets along with ulaw packets to individual
> files.  I've been able to reassemble them with ffmpeg.  However, the video
> is terribly pixelated whenever there is movement on camera.  The stream I'm
> pulling looks fine in QuickTime, but the same Quicktime shows really poor
> quality video when I reassemble it into a .mov.
> 
> My command lines:
> 
>   $ openRTSP -u user pass -e 30 rtsp://10.9.0.1/videostream.sdp
>   $ ffmpeg -y -r 15 -ar 8000 -acodec pcm_mulaw -f mulaw -i audio-PCMU-2 -f h261 -i video-H261-1 output.mov
> 
> On the original stream, QuickTime shows:
> 
>        Format:  H.261, 352x288, Millions+
>                 u-Law 2:1, Mono, 8.000 kHz
>           FPS:  0
>   Playing FPS:  15
> 
> I'm going to check with the ffmpeg list because I have no idea where the
> problem is occurring.  All I know is that the stream shows fine in Quicktime
> and is garbage once it passes through openRTSP and ffmpeg.
> 
> I'm at my wit's end; does anyone know where I should look?
> 
> Thanks!
> 
> /pg
> -- 
> Peter Green : Agathon Group : pcg at agathongroup.com
> 
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