[vlc-devel] Re: Possible UDP/RTP streaming bug

Jean-Paul Saman jean-paul.saman at planet.nl
Fri Apr 13 11:14:24 CEST 2007

Dugal Harris wrote:
> Hi
> I have a problem when trying stream high resolution video over UDP / 
> RTP.  The video is 1600x1200 MJPG and I am streaming in its source MJPG 
> format with no transcoding.  The client gives discontinuity and packet 
> loss messages (see attached log for an example).  The upper part of the 
> client video looks ok but the rest is green / garbage.
> If I take the same source video and transcode it before UDP/RTP 
> streaming or stream it over HTTP, in its source format, then everything 
> works fine.
> I see this behaviour with the most recent vlc code as well as older 
> versions (0.8.6a and 0.8.5).
> Is this a bug or am I doing something wrong?

This is not a bug. What you see is that the network is saturated when 
using MJPEG images of 1600x1200. The network drops UDP/RTP packets on 
the floor when it saturates.

The resolution is to lower the quality of the image by either using 
smaller sized images or transcoding to a lower bitrate.

Jean-Paul Saman.

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