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toinsson / pyrealsense

Cross-platform ctypes/Cython wrapper to the librealsense library (v1.x)
http://pyrealsense.readthedocs.io
Apache License 2.0
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Uncaught c++ exception: VIDIOC_DQBUF error #47

Closed papr closed 7 years ago

papr commented 7 years ago
Required Info
Camera Model R200
Firmware Version 1.0.72.06
Operating System & Version Ubuntu 16.04 LTS
librealsense version 1.12.1
pyrealsense version 2.0
python version 3.5.2

If the USB connection fails I get the following output and my Python thread dies:

terminate called after throwing an instance of 'std::runtime_error'
  what():  VIDIOC_DQBUF error 19, No such device

Any idea how to catch this exception? Or should this be actually be caught by librealsense?

toinsson commented 7 years ago

not sure I have seen that before. One thing though, librealsense + pyrealsense is not always stable when it comes to start/stop cycles. Sometimes plugging out the camera is needed to get the system back to normal. So until one crash becomes systematic, I usually ignore them.

papr commented 7 years ago

The crash is systematic and can be reproduced by disconnecting the camera while the device is_streaming. This issue is related to https://github.com/IntelRealSense/librealsense/issues/418 and should probably not be handled by pyrealsense.

toinsson commented 7 years ago

ok, didn't get that. Yes, no need to handle that in pyrealsense.