> Don't forget to put a warning with the driver that users shouldn't buy > cameras with this chipset because the vendor is an idiot :)
Hehehe. But if i should throw away all hardware where the vendor refuse to give out spec, I'll throw away half of my PC ;) ( Yeah i know i should choose my hardware better but Microsoft's joystick are damn good ;) ) > > My first question is : Are all usb webcam using about the same protocol > > ( i mean is there a lot of similarities between protocols or are they > > all completel different ? ) > > Most cameras use a yuv derivative although there are also cameras using the > bayer format. > If the camera is a low cost one the compression might not be very though, > but most compression formats aren't easy to find out. But most webcams also > have a noncompressed mode (often used for still images or snapshots) that > might be easier to start with. > > > And the second one : I suppose some people have already done this ( > > guessing protocols ). Do you have some tip on how to do ? > > It isn't easy... but try snooping on while showing some familiar patterns: > all white image (directed at lightbulb), all-black image (bit harder due to > noise), half black half white (might show linelength), alternating pattern, > different collors (might give you a clue about the colorspace used (yuv vs > rgb) and so on. For now, I just try to decode the setup packets sended at the start of the driver init to initiate myself a little more with USB system ( actually it's my first driver and i've never tryied USB before so i'm currently mainly reading doc ... ) A+, Munaut Sylvain _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
