I have found a trouble in the SDK. I normally use SceJpegDecodeMJpeg
to decompress the data that are created by
sceUsbCamReadVideoFrameBlocking.
Well, it's ok when the resolution is 640*480, but when the resolution
of the camera is set at an higher value (for example 1024*768),
the function SceJpegDecodeMJpeg fails.