Messages in this thread | | | Date | Sun, 20 Jan 2002 12:08:37 -0500 | From | christophe barbé <> | Subject | Re: usb-ohci, ov511, video4linux |
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On Sun, Jan 20, 2002 at 05:22:58PM +0100, Guus Sliepen wrote: > On Sun, Jan 20, 2002 at 10:41:19AM -0500, christophe barbé wrote: > > > The Xawtv outputs are interesting : > > > > # xawtv > > This is xawtv-3.68, running on Linux/i586 (2.4.17) > > /dev/video0 [v4l]: no overlay support > > That's normal. > > > v4l-conf had some trouble, trying to continue anyway > > That too, because of the earlier warning about overlay. > > > v4l: timeout (got SIGALRM), hardware/driver problems? > > ioctl: VIDIOCSYNC(0): Appel système interrompu > > v4l: timeout (got SIGALRM), hardware/driver problems? > > ioctl: VIDIOCSYNC(1): Appel système interrompu > > xawtv has a very short timeout when it tries to grab frames. It really > was made for TV cards, not webcams. You can either change xawtv's > libng/grab-v4l.c and edit the line containing #define SYNC_TIMEOUT, or > use a program like gqcam that is written especially for slow USB > webcams. > > The problems with the other USB devices might be caused by the fact that > USB webcams will use all the available bandwidth.
I have the same problem with gqcam, camstream and gnomemeeting. With xawtv and the debug option, the problem disapears. Perhaps the timeout is increased in this case. I will check the code.
The problem with the usb mouse is there with or without webcam.
Christophe
> > -- > Met vriendelijke groet / with kind regards, > Guus Sliepen <guus@sliepen.warande.net>
-- Christophe Barbé <christophe.barbe@ufies.org> GnuPG FingerPrint: E0F6 FADF 2A5C F072 6AF8 F67A 8F45 2F1E D72C B41E
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