Hi, guvcview just handles this like any other V4L2 device. You should look at the driver in this case, and check what it does when a VIDIOC_STREAMOFF is received. Regards, Paulo PS: adding linux media to CC 2014/1/1 Ayoub, Hani <hani.ayoub@xxxxxxxxx>: > Hi, > > I’m trying to bring up a device which sends data using BULK transfer using > V4L2 UVC Linux driver (Ubuntu 12.04). > > Using guvcview, I can see that the device transfer data successfully and I > can see a stream. However, that works fine ONLY the first time I run > guvcview after I plug-in the device, closing the app and re-launching it > does not show any pictures… to get a good stream I have to re-plug-in the > device to the USB 3.0 port. > > > > Via USB analyzer, I can see that when closing the application (closing the > device) an “AltSet 1” (alternateSetting set 1) is sent although it’s > prohibited by spec (UVC 1.1 section 2.4.3) – so the device ignores it, this > (I think) is the reason why the stream doesn’t work when re-launching the > application. > > > > My question is: how should I properly close the stream in BULK? Is there any > way to “patch” V4L or the application to make closing the device works fine? > > There are some similar discussions in the web, but I think there’s no real > answer (some references below) > > > > References: > > · Thread1 > > · Thread2 > > · Thread3 > > · Thread4 > > > > Thanks, > > Hani; > > --------------------------------------------------------------------- > Intel Israel (74) Limited > > This e-mail and any attachments may contain confidential material for > the sole use of the intended recipient(s). Any review or distribution > by others is strictly prohibited. If you are not the intended > recipient, please contact the sender and delete all copies. > > > ------------------------------------------------------------------------------ > Rapidly troubleshoot problems before they affect your business. Most IT > organizations don't have a clear picture of how application performance > affects their revenue. With AppDynamics, you get 100% visibility into your > Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics > Pro! > http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk > _______________________________________________ > Linux-uvc-devel mailing list > Linux-uvc-devel@xxxxxxxxxxxxxxxxxxxxx > https://lists.sourceforge.net/lists/listinfo/linux-uvc-devel > -- 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
