--- In "ambro_678" <> wrote:
>
> Hi,
> I'm trying to stream video from a USB webcam connected to my ts7400
> board through network, but I'm having some performance issueses.
> I'm currently using a quickcam camera, resolution 356x292. It works
> well with the qc-usb driver, which I modified to disallow YUV
> formats, preventing slow colorspace conversion in the driver.
> Encoding with the 'ffmpeg' program is too slow - it can only do about
> 5 fps (using the asv1 codec, mpeg4 is way too slow), but the camera
> can capture at 7 fps. I've looked into it and it seems that the
> capture process is eating a lot of CPU, as encoding from a raw video
> file works at 8 fps.
> Does anyone know some software which would do video encoding fast
> enough? Or is there a way to overclock the system so I would get 7
> fps?
>
Work out the bandwidth of the camera and the USB speed. The USB port
can do 12 Mb/sec. 356*292*24*5 = 12.3 Mb/sec. (I'm guessing that the
camera puts out 24 bit depth.)
Unless you can reduce the frame depth you're pretty much out of luck.
--Yan
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