Please file a bug report at http://bugreporter.apple.com. Please include a full Apple System Profiler, as well as the USB Bus Probe description of the camera. Mac OS X does support Bulk pipe cameras, but there is obviously some problem with the software or the video stream. We can continue that conversation through the bug report.
--
Fernando Urbina
USB Technology Team
Apple Inc.
On Feb 1, 2010, at 3:42 AM, Kristoffer Berggren wrote:
> Hello,
>
> We have a proprietary USB camera that is currently working fine on
> Windows. We are trying to access it on Mac OS X (10.6). We are able to
> set up and send control commands to the camera, but whenever Quicktime
> API tries to access the video stream the system load reaches extreme
> levels, and no video is accessed. After a while it sort of gives up it
> seems. The control commands on this particular camera is a bit
> different, due to the fact that all control communication is taken place
> on the Brightness channel. We think our camera sends video stream, but
> we are unable to verify it to 100%. The USB logger shows massive amounts
> of traffic when we initialize the camera, which should indicate that it
> sends us video. LEDs on the camera also indicated video is being sent.
>
> The camera "should be" UVC compliant according to our information, but
> we are unsure if it actually is. If we try to use another camera,
> Logitech C250, which is an actual UVC camera, our application works just
> fine. We assume Mac OS X has a built-in UVC-driver, but we can't find
> out much information about it. Is there a way we can verify that our
> camera is a working UVC-camera or not somehow? We have stumbled upon the
> macam-project, but since our camera should be a UVC-camera, that road is
> hopefully not necessary (current macam-drivers do not support our
> camera).
>
> USB prober identifies our camera as a 239 (Miscellaneous) device, with
> two interfaces. #0 Video/control and #1 Video/streaming. The difference
> we can see between our camera and the Logitech C250 is, besides the
> extra amount of streaming interfaces on C250, that the Endpoint on our
> Video/Streaming interface is "0x82 Bulk Input", whereas the C250 has
> "0x81 Isochronous Input". What does this difference actually mean? We
> feel a bit lost regarding this.
>
> Regards
> Kristoffer
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