Hi, On Friday 20 August 2010 13:37:26 [email protected] wrote: > I've seen some discussion about this in January 2010 on this list. Has > this issue been resolved? For those who don't remember or haven't seen > the post, it is here: > > http://lists.berlios.de/pipermail/linux-uvc-devel/2010-January/005464.html > > Essentially the camera seems to request the highest bandwidth regardless > of fps, resolution, compression (raw or mjpeg). > > Has anybody come up with a solution for this? Is there a patch, or one > in progress?
Not that I know of. > Anyway of ignoring the camera request, or forcing it to accept less > bandwidth as necessary? Yes, see http://lists.berlios.de/pipermail/linux-uvc-devel/2010- January/005508.html The camera can work with less bandwidth, but the driver has no way to find that out by itself. For uncompressed formats the driver can compute a bandwidth estimate based on the image size, but for compressed formats that's not possible. > I have tried vlc, ffmpeg, motion - it will not allow me to use more then > one MS Lifecam Cinema at the same time because of usb bandwidth > limitations - even if I force mjpeg compression, low fps (down to 1) and > low resolution (320x240). On the other hand, I have a Logitech QuickCam > Pro 9000 (with similarly high spec) and two MS Lifecam VX-5000 - and I > can use all three at the same time if I force mjpeg compression, with > 640x480 and fps 10 - so it would be possible. -- Regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
