Laurent Pinchart <[email protected]> writes: > Hi Jon, > > On Tuesday 02 June 2009 19:34:55 Jon Fairbairn wrote: >> Laurent Pinchart <[email protected]> writes: >> > >> > I would still be interested in messages printed by the >> > uvcvideo driver in the kernel log when running motion. >> >> With trace=15, there's quite a lot. I've removed what I think >> is boring, but let me know if I've trimmed too much: [...] >> Enabling workaround. [ the next section repeats continually while motion is >> running ] >> uvcvideo: Trying format 0x47504a4d (MJPG): 352x288. >> uvcvideo: Using default frame interval 33333.3 us (30.0 fps). >> uvcvideo: Trying format 0x47504a4d (MJPG): 352x288. >> uvcvideo: Using default frame interval 33333.3 us (30.0 fps). >> uvcvideo: Setting jpeg quality to 100. >> uvcvideo: Control 0x0098090e not found. >> uvcvideo: Control 0x0098090f not found. >> uvcvideo: Control 0x00980911 not found. >> uvcvideo: Control 0x00980912 not found. >> uvcvideo: Control 0x00980913 not found. >> uvcvideo: Control 0x08000000 not found. >> uvcvideo: Control 0x08000001 not found. >> uvcvideo: device Live! Cam Optia requested null bandwidth, defaulting to >> lowest. > > The problem might be in motion then.
It turns out that the problem is that the Creative Live! Cam Optia can't drive 4.8m of cable properly (even though that's less than the spec), and drops/corrupts frames. Then motion is rather too intolerant of bad frames. With no extension lead or a hub (even bus-powered) in the line, the problem disappears. >> > > mplayer with -tv mjpeg >> > >> > It might still be using MJPEG, although this sounds a bit >> > weird. >> >> It doesn't look like it... > And there might be a problem in mplayer as well. That seems likely. If I have time I'll report that. In the meantime, I reckon the JPEGCOMP support is working. Can it go into the released version, please? -- Jón Fairbairn [email protected] _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
