Re: A videocam works on OHCI and fails on UHCI

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Am Sonntag, 15. November 2009 23:15:32 schrieb Theodore Kilgore:
> Now, I said something about the OEM drivers. In webcam mode, all of the 
> OEM drivers that I know of set the default resolution setting at 320x240. 
> Some of them will not even let you change that. And, using the commands 
> which can be detected by sniffing, one can not get a 352x288-capable 
> camera, nor for that matter a 640x480-capable camera, to stream decently 
> at 352x288 or 176x144. Something comes out, but the frames jump terribly. 
> It was in eliminating the sources of that jumpiness that I simply got rid 
> of several setup commands, and thereby landed in the soup by leaving out a 
> command which appears to be essential for making some of the cameras 
> stream on a UHCI system. There are obvious lessons to be derived. I have a 
> long memory, and I think I will apply them.

So if I understand you correctly to make the camera work on UHCI you
have to go to a lower resolution? Thereby you are lowering the data rate,
aren't you? That does a lot less to absolve UHCI, if it works only at a lower
rate.

	Regards
		Oliver
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