Things about video capture in WL-series

[goodwell]

Hi.
I've connected Logitech 4000 webcam and try to record video stream with ffmpeg.
It's working but one thing.
Depends on resolution capture framerate is less than 9fps.
ffmpeg do not want to work if frame rate set less than 20fps.
The result is that the 10sec video need to be captured during 20sec.
Recorded file have 20sec lenght but consist only 10sec data.

Video compress parameters do not affect this speed - only capture resolution can affect.
What is the problem? I don't think that CPU can't handle it.

[goodwell]

Ok. The news.
While i ran ffmpeg the Top show no more than 85% CPU usage. About 5% takes other procs. With 10% free it can't get more than 10 fps. It seems that the problem is in the USB throughput.

[stinkydiver73]

It is possible to capture mjpg video with a jpg type(spca) webcam?