Hi Edwin, On Saturday 22 October 2011 00:36:14 Edwin Aponte wrote: > libv4l2 is giving having problems with a Microsoft LifeCam NX-6000 > webcam (045e:00f8). I have to run skype as below to get the webcam > working well for a moment, though an error is generated, until the > system freezes completely after some minutes and even SysRq doesn't > work.
Those two problems are likely unrelated, and the second one is pretty bad. Is your machine connected to a network ? Can you still ping it after it freezes ? What about ssh ? > env LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so skype > libv4l2: error converting / decoding frame data: v4l-convert: error > parsing > JPEG header: Not a JPG file ? Your camera seems to produce bad MJPEG frames. From the log you've attached it seems that the first frame is bigger than the next ones. This might be related. Could you try luvcview, which doesn't use libv4l ? > Sometimes, I get the same error with the program webcam: > -------------------------- > ~> webcam > reading config file: /home/edwinh/.webcamrc > video4linux webcam v1.5 - (c) 1998-2002 Gerd Knorr > grabber config: > size 320x240 [none] > input (null), norm (null), jpeg quality 75 > rotate=0, top=0, left=0, bottom=240, right=320 > libv4l2: error converting / decoding frame data: v4l-convert: error > parsing > JPEG header: Not a JPG file ? > > > v4l2: read: Input/output error > capturing image failed > ------------------------- > > and some times this other error: > > ------------------------- > ~> webcam > reading config file: /home/edwinh/.webcamrc > video4linux webcam v1.5 - (c) 1998-2002 Gerd Knorr > grabber config: > size 320x240 [none] > input (null), norm (null), jpeg quality 75 > rotate=0, top=0, left=0, bottom=240, right=320 > libv4lconvert: Error decompressing JPEG: fill_nbits error: need 1 more > bits > ------------------------- > > I have attached some information based on this thread > http://lists.berlios.de/pipermail/linux-uvc-devel/2008-November/004265.html > that seems to be a similar case of my problem. > I set the trace level to 255: > > # echo 255 > /sys/module/uvcvideo/parameters/trace > > and I record a frame using: > ~> luvcview -f mjpg -c > > and after that I saved the output of dmesg. > > Thanks. -- Regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list Linux-uvc-devel@lists.berlios.de https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
