Hi Laurent, Thanks for the reply. Yes, I tried with same INPUT/OUTPUT terminal for both Video streaming interfaces. I will try with different INPUT/OUTPUT terminal. But physcially there is only one INPUT/OUTPUT terminal in the device. Can I logically create two INPUT/OUTPUT terminal both pointing the same physical entity? Both there INPUT/OUTPUT terminal are part of the same CONTROL interface right?
Basically what I am trying to acheive is, give user a flexiblity of choosing the transfer type based on thier required bandwidth. I decided to give two logical devices on the host side, so that user can exclusively select one device and stream it. Will the above approach work in this way or i am missing something here, suggestions? Thanks, Ramesh. On Sun, Dec 27, 2009 at 12:06 AM, Laurent Pinchart < laurent.pinch...@ideasonboard.com> wrote: > Hi Ramesh, > > On Wednesday 23 December 2009 12:10:24 Ramesh Rajagopal wrote: > > Hi, > > I want my webcam to provide two streaming interfaces one with ISOC > transfer, > > another with BULK transfer. On the fly user can choose any of the > transfer > > and do cature. I am planning to try like following > > > > One control interface with interrupt endpoint for status. > > Two streaming interface, one with alternate settings for ISOC with > > supported formats(MJPEG, YUYV) > > another video streaming interface without alternate settings for BULK > > transfer with supported formats. > > > > First off all, is it possible to try this practically ? Will the host be > > able to handle both the streamings ? > > Yes, but only if the two streaming interfaces are associated with different > UVC input or output terminals in the control interface. > > > I tried in the above way, the camera enumeration seemed successful, > however > > I did get only one device on the host (/dev/vide0). I hope for two > streaming > > interfaces you should get two devices on the host > > isn't it? > > I suspect that you're trying to use two different streaming interfaces with > the same USB output terminal. That's not possible. > > -- > Regards, > > Laurent Pinchart >
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