Markus Rechberger schrieb:
On Tue, Apr 13, 2010 at 10:27 AM, Andreas Auer <[email protected]> wrote:
Hi,
I'm trying to get a UVC webcam working with the latest khilman kernel
(2.6.34) on a Davinci EVM like board with DM6446 processor.
I'm able to request the buffers and queue them without errors. But if I
switch on the streaming the UVC driver tells me:
"uvcvideo: USB isochronous frame lost (-18)."
Some time ago, I tried the 2.6.32 kernel from the arago project and webcam
capturing was working out of the box but WLAN was not working. (so, I
switched to the khilman kernel).
Maybe, someone can help me with the uvc webcam problem!!!
with our tests the DM6446 only supported up to around 4.5 mbyte of
isochronous data...
Raw Analog TV 720x576x25 requires around 170 mbit, I guess webcams are
near to that level there's no chance to get such a thing work.
Maybe MJPEG or MPEG based devices can work with it.
Thanks for your reply. I have a Logitech QuickCam Communicate Deluxe
with MJPEG format. And this webcam is working with the 2.6.32 kernel
from the arago project. So, I think this cam should be working.
Does anyone know what's the above "status code" -18 means??
Thanks,
Andreas
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