On Monday 26 October 2009 15:06:41 Hans de Goede wrote: > On 10/26/2009 12:52 PM, Alexey Fisher wrote: > > Am Sonntag, den 25.10.2009, 14:21 +0100 schrieb Hans de Goede: [snip] > > > fwiw I'm a v4l kernel developer, but I'm not involved in the UVC driver, > > > I'm however a contributor to cheese, I thought that my input that cheese > > > would give up even if the driver has a long enough timeout would be > > > helpful. > > > > > > To try and see if this (the cheese timeout is the issue), you will need > > > to re-compile cheese from source, after unpacking cheese, edit > > > src/cheese-webcam.c and goto line 716 (in 2.28.0) > > > > > > And change the "10 * GST_SECOND" there in something bigger. I also see > > > that I'm mistaken and the timeout in cheese is not 3 but 10 seconds, it > > > might have changed recently, or my memory has been playing tricks on me. > > > > > > I still believe this might be the cause, the trace you have posted seems > > > consistent with cheese's behaviour. Also noticed that there never is a > > > successfull DQBUF the first time cheese opens the device. If cheese > > > (or rather gstreamer) does not manage to DQBUF the first time, then > > > cheese will not work with the device. There is a limitation in gstreamer > > > (or maybe in the way cheese uses it) where gstreamer needs to be > > > streaming before cheese can tell the properties of the cam. If the > > > stream does not start within the first 10 seconds, then cheese will fail > > > to get the properties. > > > > > > If you go to cheese's edit -> preferences menu, and your cam has no > > > resolutions listed there (the resolution drop down is grayed out). This > > > is what is happening. > > > > > > As for empathy, I'm not familiar with that. But if we can get cheese to > > > work first I'm sure that that would be a good step in the right > > > direction. > > > > Hallo Hans, > > thank you for your constructive response, > > I increased timeout to 15 seconds i now i can't reproduce camera freeze, > > i'll play with it more to be sure. There is still one issue with it - on > > cold start the image is zoomed in. > > I need to close cheese and open it again to get normal zoom. The > > resolution seems to be the same. Zoomed in ? Really ? As far as I know the QuickCam Pro for Notebooks has no optical or digital zoom. Could you please send me lsusb's output for your device ? > That definitely sounds like a camera bug, but maybe we can do something > on the driver side (like forcing a resolution change even if not necessary) > to work around this. Laurent ? The driver already sends a video format and resolution set request to the device when starting the video stream. > Note re-adding the mailing list and Laurent to the CC, they somehow got > dropped. Thanks. -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
