On Wed, 6 Aug 2003, Tuukka Toivonen wrote: > On Tue, 5 Aug 2003, Ed Okerson wrote: > > >The Logitech works with the qce-ga driver, but the video is terrible, and > > Have you loaded the driver with option "interpolation=1"? > It makes the quality much better. That helped a little, but the quality is still bad. > >it refuses to work with the newer qc-usb driver, but I don't know if that > > Well, this is very annoying thing. Could you load qc-usb with option > "debug=-1" and send the kernel log to me? (I couldn't find that you would > have done this already). Does the driver recognize at all the camera, or > what's wrong? Well, the debug=-1 on quickcam didn't make it log any more, but here is what I get: Aug 6 07:22:45 localhost kernel: usb.c: registered new driver quickcam Aug 6 07:22:45 localhost kernel: quickcam: QuickCam USB camera found (driver version QuickCam USB $Date: 2003/06/30 10:04:40 $) Aug 6 07:22:45 localhost kernel: quickcam: Sensor VV6410 detected Then when I run xawtv it gives: [eokerson@localhost eokerson]$ xawtv This is xawtv-3.74, running on Linux/i686 (2.4.20) can't open /dev/video0: Broken pipe v4l2: open /dev/video0: Broken pipe v4l: open /dev/video0: Broken pipe no video grabber device available [eokerson@localhost eokerson]$ and then log then shows: Aug 6 07:23:01 localhost kernel: usb-uhci.c: interrupt, status 2, frame# 1355 Aug 6 07:23:01 localhost kernel: quickcam: sensor initialization failed: -32 > >would affect the video quality anyway. The frame rate appears to be very > >low, > > However, you can't expect more than 7.5 fps with full size video. Ouch. > > and any motion at all causes horrible distortion of the video. The > > Hmm, shouldn't happen. Something is wrong. I guess this happens due to > exposure control, and it should be better with qc-usb (or disable exposure > control--easy with qc-usb, for qce-ga there is a patch: > http://www.ee.oulu.fi/~tuukkat/quickcam/quickcam-web-autoexp.patch > but it might not apply cleanly against newest versions) > > >motion, although not quite as bad as the Logitech. I would like to find > >something that approaches the quality that I get from a BT878 capture card > >with an NTSC camera attached. Does such a thing exist for USB? PTZ > > The driver would need compression support, otherwise USB bandwidth is too > little. Many vendors think that their compression support is so bad that > they don't want to tell anyone how it works, for example Philips. However, > for Philips cameras there's binary-only decompression module. But I don't > think it will have anywhere near bttv image quality. > > What about real video camera and a BTTV card? > There is no PCI slot on the laptop. I also have a Hauppauge USB-Live, but there don't appear to any Linux drivers available for it. Ed Okerson
