V4L2 logging for multiple streams

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Hi,

I'm trying to sort some issues with regards to decoding multiple
streams at once.  Logging can be helpful with messages like this:

[105188.500450] video2: VIDIOC_STREAMOFF: type=vid-out-mplane

but when I have:

[105188.498697] video2: VIDIOC_STREAMOFF: type=vid-out-mplane
[105188.498715] video2: VIDIOC_STREAMOFF: type=vid-cap-mplane
[105188.499116] video2: VIDIOC_UNSUBSCRIBE_EVENT: type=0x5, id=0x0, flags=0x0
[105188.500450] video2: VIDIOC_STREAMOFF: type=vid-out-mplane
[105188.500467] video2: VIDIOC_STREAMOFF: type=vid-cap-mplane
[105188.500611] video2: VIDIOC_UNSUBSCRIBE_EVENT: type=0x5, id=0x0, flags=0x0
[105188.501879] video2: VIDIOC_UNSUBSCRIBE_EVENT: type=0x5, id=0x0, flags=0x0
[105188.502276] video2: VIDIOC_STREAMOFF: type=vid-out-mplane
[105188.502331] video2: VIDIOC_STREAMOFF: type=vid-cap-mplane

I can't tell which stream VIDIOC_STREAMOFF is associated with.  Is
there a logging option that I'm missing that would help indicate which
stream that ioctl is associated with.

Thanks.

-Fritz



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