Hi Laurent, the driver my device uses is the uvcvideo. I have the kernel 3.11.0-18 from Ubuntu 13.10 running. It is built in in a Thinkpad X240 notebook. Regards, Thomas ________________________________________ Von: Laurent Pinchart [laurent.pinchart@xxxxxxxxxxxxxxxx] Gesendet: Mittwoch, 2. April 2014 21:23 An: Scheuermann, Mail Cc: linux-media@xxxxxxxxxxxxxxx Betreff: Re: v4l2_buffer with PBO mapped memory Hi Thomas, On Wednesday 02 April 2014 17:10:42 Thomas Scheuermann wrote: > Hello, > > I've written a program which shows my webcam with the v4l2 interface. > In the v4l2_buffer I use the type V4L2_BUF_TYPE_VIDEO_CAPTURE and the > memory is V4L2_MEMORY_USERPTR. > Everything works if I use malloced memory for frame buffers. > Now I want to get the frames directly in OpenGL. I've mapped a pixel > buffer object with glMapBuffer and wanted to use this as a frame buffer. > But if I use this memory, the ioctl VIDIOC_QBUF fails with 'invalid > argument'. > > What can I do to use the pixel buffer object together with the v4l2 > interface? > I want to use as less copy steps as possible. The use case is reasonable (although V4L2_MEMORY_DMABUF would be better, but we're not there yet on the OpenGL side I believe), so let's try to debug this. First of all, what webcam driver do you use ? -- Regards, Laurent Pinchart This message is subject to the following terms and conditions: MAIL DISCLAIMER<http://www.barco.com/en/maildisclaimer> -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
