pyDC1394

camera.py: collections.deque instead of Queue

Asked by Josef Stoll

hi,
I'm using pydc1394 with a point grey Grasshopper for a psycho-physics experiment (pupilometry).
As there occure a lot of switches between interactive=True/False modes, which is "sort of buggy",
my idea was to give collections.deque a try. It would not hang up, because it drops the older frames if they got not popped in time.
Thus, I could change between display and recording mode, without stopping the camera in between.

Unfortunately, the deque-queue runs empty in recording mode and I'm not able to handle its exception.
Does anyone know reasons, why? Any alternatives?

Best,
Josef

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SirVer (sirver) said : 		#1

Josef,

I am not sure if dequeue is interprocess/thread safe. This might be the reason for your problem. If you can push a branch with your changes to launchpad, it would be easier to help you debug this.

Regards,
Holger

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