Hi Dave, On Wednesday 14 July 2010 18:30:32 Dave Milici wrote: > Hi all-- > > How is audio + video sync from usb camera guaranteed?
I'm afraid there's no such guarantee at the moment. The uvcvideo driver doesn't handle video timestamps which would be required for audio/video sync (the usbaudio driver would also need to handle audio timestamps, and I don't think it does at the moment). > We are using a Pixart camera with Linux 2.6.33 UVC driver and V4L2 + ALSA. > > Sometimes the video stream from V4L2 is late coming in compared to audio > stream from ALSA, with timestamps later by ~150 msec or more. > > Are there examples for communicating with UVC driver directly without V4L? No, V4L2 is the only API, there's no "direct" communication with the UVC driver. -- Regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list Linux-uvc-devel@lists.berlios.de https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
