2010/3/31 Rogier Wolff <r.e.wo...@bitwizard.nl> > On Wed, Mar 31, 2010 at 08:16:25PM +0800, Gallon Fr wrote: > > > Whoops!That stumped me.I'm afraid Fedora 12 runs on a "module > > build-in" kernel,(I don't know the terminology so the strange > > phrase) cuz I can find nothing about ehci or uhci in the module > > list.AND, I don't know how to remove a "build-in" module.I tried to > > disable USB2.0 support in the BIOS,but the OEM motherboard stopped > > me. > > Oops. Yeah! Same here. Modern kernels apparently have it built in. No > there is no easy way to remove it when it's builtin. You'd have to > build your own kernel, but for this simple test it isn't worth the > trouble for you to do that... > > So still we're convinced that while some cameras remove formats from > their list-of-supported-formats depending on the USB connection speed, > your camera is a bit weird and switches the list completely when on > a full-speed (usb-1.1, 12Mbps) connection. > > So, your application will have to handle the mjpeg stream. It's not > that difficult, but you'll have to link against libjpeg to decode > it. Whether Libjpeg can decode directly into yuv I don't know. > > For testing/development purposes I suggest you find a camera that you > can connect to your PC that also supports mjpeg there..... > > Roger. >
Thanks for all the info. Maybe I can try it on another computer later,on which I can disable the USB2.0 from the BIOS.Or I'll try to study making a time-killing system by following the LFS documentation.But for now,I'll have to focus on decoding the MJPEG stream to finish my assignment. Best,Regards Fei
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