Select Timeout error in Ubuntu - Opencv
I am trying to set OpenCv up for my final year project and have run into a couple of problems. I successfully got it set up in Ubuntu following this tutorial.
The problem I am having now is keeping this sample program running. The program is face detection using a webcam.
It runs fine for 3 or 4 seconds and then the capture gets stuck with a single frame in the window. The console displays the following output.
tom@ubuntu:~/College/opencv/faceDetect_sample$ make
./faceDetect --cascade="haarcascade_frontalface_alt.xml" --nested-cascade="haarcascade_eye_tree_eyeglasses.xml"
VIDIOC_QUERYMENU: Invalid argument
VIDIOC_QUERYMENU: Invalid argument
VIDIOC_QUERYMENU: Invalid argument
init done
opengl support available
select timeout
select timeout
select timeout
select timeout
select timeout
select timeout
^Cmake: *** [run] Interrupt
If anybody has an idea of where to go from here, I would really appreciate some help !
Answer
Try this:
modprobe uvcvideo nodrop=1 timeout=6000
and if that works, simply make the changes permanent by editing /etc/modprobe.d/modprobe.conf
Try increasing the timeout to a ridiculously large number. That should fix the issue, or at least it worked for me. It's just that the call to select returns no ready descriptors, and that may be caused by the video driver, or device one.
If that does not work,
Enable module traces:
sudo echo 0xffff > /sys/module/uvcvideo/parameters/trace
Run the program until the error is found, and stop it as soon as possible. Then disable the traces:
sudo echo 0 > /sys/module/uvcvideo/parameters/trace
Search with dmesg for error messages.