How to detect USB camera disconnection?
Hi, all.
I've a Vimicro USB cam that I'm constantly pooling for taking snapshots using an application made by me. How can I programmatically detect when the cam is disconnected?
It seems to me that V4L "thinks" that the cam is still there, even with the cable disconnected.
Any hints?
--- > I'd forgot to say: the driver I'm using is gspca, last version. Works like a charm. My problem is related to cable's cam disconnected.
Nilo Roberto C Paim
TinyCOBOL - Equipe de Desenvolvimento
Porto Alegre - RS - Brasil
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Quoted 10 lines · On Thu, 20 Aug 2009 13:54:26 -0300 "Nilo Roberto C Paim" <[email protected]>…
I've a Vimicro USB cam that I'm constantly pooling for taking snapshots using an application made by me. How can I programmatically detect when the cam is disconnected?
It seems to me that V4L "thinks" that the cam is still there, even with the cable disconnected.
--- > I'd forgot to say: the driver I'm using is gspca, last version. Works like a charm. My problem is related to cable's cam disconnected.
Hi Nilo,
I don't know how you poll. Normally, when the webcam is disconnected, the I/O calls should fail with errno = NODEV.
Cheers.
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