Why do I see frequent reports of bad frames or missing fragments when receiving video, even though I believe I have plenty of network capacity?
The default IP buffers provided by the system are generally far too small to support the demands of video reception, even for compressed video such as DV. In order to correct this, you should (as root) increase the buffer temporarily with sysctl -w net.core.rmem_max=500000 or permanently, by adding the following line to /etc/sysctl.conf: net.core.rmem_max=500000 Note that the latter goes into effect only after a reboot. • Why do my attempts to transmit video result in a strange (non-) image? The Ultra-Videoconferencing software defaults to the first valid video channel as reported by the frame grabber to the operating system. Some cards seem to report a valid channel for configurations that produce invalid video; in this case, you may wish to experiment with the -C flag (./uv -v -C <#> with <#> ranging between 0 and 4. • What audio modes and devices are supported by Ultra-Videoconferencing? Ultra-Videoconferencing supports audio using either the Open Sound System (OSS) or Advanced Linu
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