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From wang jun <>
Subject Re: the rate of camera capture
Date Thu, 14 Jul 2011 01:50:45 GMT
Maybe that‘s the main reason troubling you for rather a long time.
As Zhang said,18-22 frame per second is enough for us to use.
That's really a good news for us all.

2011/7/14 hz nan <>

> Hi,all
> In Linux, the rate of camera capture is different for diffrent camera.For
> Logitech,
> it need 120ms to capture one frame, it means that it can only capture 8
> frames
> one second. But for a good camera, it can capture 18-22frame one second.The
> time is not used in the ffmpeg but used in the system function "iotcl"
> equate
> with
> camera read. Because opencvalso use V4L, so the opencv speed is also
> improve
>  use good camera.
> And because in Linux, system can't reopen camera,  I can't use multithread
> to improve the capture rate.
> nan hongzhen

*If the dream is big enough,the facts don't count.*

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