Unable to detect USB camera
I am trying to use 5 USB cameras on Ubuntu 18.04.1 LTS in python3.6 using opencv3.4.1 through a simple program. I am just using 'cv2.videoCapture()' and then after reading the result use 'cv2.imshow()'.
Individually all cameras work fine, but as I connect them all together the following happens:
Mostly all cameras are successfully detected in start and are listed in lsusb as well as ls /dev/video*, but as I try to use them through my code in python one of these 5 cameras disappear and error like
VIDEOIO ERROR: V4L: index 0 is not correct!
is printed.A nd after that either ls /dev/video* does not show that camera or the camera name e.g. video0 is automatically changed to e.g. video6. I know if we restart PC the device names are changed but in this case I am not rebooting.
Sometimes the cameras are enlisted in both lsusb as well as in ls /dev/video* but while using select timeout appears.
Let me know if you need further information.
usb video webcam camera image-processing
edited Jan 18 at 8:12
Codito ergo sum
1,5023825
asked Jan 18 at 3:08
learning never endslearning never ends
62
add a comment |
I am trying to use 5 USB cameras on Ubuntu 18.04.1 LTS in python3.6 using opencv3.4.1 through a simple program. I am just using 'cv2.videoCapture()' and then after reading the result use 'cv2.imshow()'.
Individually all cameras work fine, but as I connect them all together the following happens:
Mostly all cameras are successfully detected in start and are listed in lsusb as well as ls /dev/video*, but as I try to use them through my code in python one of these 5 cameras disappear and error like
VIDEOIO ERROR: V4L: index 0 is not correct!
is printed.A nd after that either ls /dev/video* does not show that camera or the camera name e.g. video0 is automatically changed to e.g. video6. I know if we restart PC the device names are changed but in this case I am not rebooting.
Sometimes the cameras are enlisted in both lsusb as well as in ls /dev/video* but while using select timeout appears.
Let me know if you need further information.
usb video webcam camera image-processing
edited Jan 18 at 8:12
Codito ergo sum
1,5023825
asked Jan 18 at 3:08
learning never endslearning never ends
62
Canguvcviewopen multiple streams simultaneously without issue?
– Android Dev
Jan 18 at 16:15
add a comment |
I am trying to use 5 USB cameras on Ubuntu 18.04.1 LTS in python3.6 using opencv3.4.1 through a simple program. I am just using 'cv2.videoCapture()' and then after reading the result use 'cv2.imshow()'.
Individually all cameras work fine, but as I connect them all together the following happens:
Mostly all cameras are successfully detected in start and are listed in lsusb as well as ls /dev/video*, but as I try to use them through my code in python one of these 5 cameras disappear and error like
VIDEOIO ERROR: V4L: index 0 is not correct!
is printed.A nd after that either ls /dev/video* does not show that camera or the camera name e.g. video0 is automatically changed to e.g. video6. I know if we restart PC the device names are changed but in this case I am not rebooting.
Sometimes the cameras are enlisted in both lsusb as well as in ls /dev/video* but while using select timeout appears.
Let me know if you need further information.
usb video webcam camera image-processing
edited Jan 18 at 8:12
Codito ergo sum
1,5023825
asked Jan 18 at 3:08
learning never endslearning never ends
62
I am trying to use 5 USB cameras on Ubuntu 18.04.1 LTS in python3.6 using opencv3.4.1 through a simple program. I am just using 'cv2.videoCapture()' and then after reading the result use 'cv2.imshow()'.
Individually all cameras work fine, but as I connect them all together the following happens:
Mostly all cameras are successfully detected in start and are listed in lsusb as well as ls /dev/video*, but as I try to use them through my code in python one of these 5 cameras disappear and error like
VIDEOIO ERROR: V4L: index 0 is not correct!
is printed.A nd after that either ls /dev/video* does not show that camera or the camera name e.g. video0 is automatically changed to e.g. video6. I know if we restart PC the device names are changed but in this case I am not rebooting.
Sometimes the cameras are enlisted in both lsusb as well as in ls /dev/video* but while using select timeout appears.
Let me know if you need further information.
usb video webcam camera image-processing
usb video webcam camera image-processing
edited Jan 18 at 8:12
Codito ergo sum
1,5023825
asked Jan 18 at 3:08
learning never endslearning never ends
62
edited Jan 18 at 8:12
Codito ergo sum
1,5023825
asked Jan 18 at 3:08
learning never endslearning never ends
62
edited Jan 18 at 8:12
Codito ergo sum
1,5023825
edited Jan 18 at 8:12
Codito ergo sum
1,5023825
edited Jan 18 at 8:12
Codito ergo sum
1,5023825
1,5023825
asked Jan 18 at 3:08
learning never endslearning never ends
62
asked Jan 18 at 3:08
learning never endslearning never ends
62
asked Jan 18 at 3:08
learning never endslearning never ends
62
62
Canguvcviewopen multiple streams simultaneously without issue?
– Android Dev
Jan 18 at 16:15
add a comment |
Canguvcviewopen multiple streams simultaneously without issue?
– Android Dev
Jan 18 at 16:15
Can
guvcview open multiple streams simultaneously without issue?– Android Dev
Jan 18 at 16:15
Can
guvcview open multiple streams simultaneously without issue?– Android Dev
Jan 18 at 16:15
add a comment |
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Can
guvcviewopen multiple streams simultaneously without issue?– Android Dev
Jan 18 at 16:15