Gerd Knorr wrote: > > > (video standard) support via the VIDIOCSCHAN call (V4L1 has only this > > cmd to set the video norm), and bttv's private 'BTTV_FIELDNR' cmd. > > What BTTV_FIELDNR is used for? IMHO Applications should'nt not use it. > > Gerd It is a bttv only ioctl for finding out the capture sequence number of the current frame. As I have noted before, there is no such functionality in vl41, and my proposed extension got filed in /dev/null (with no explanation)... As it is at the moment, this is the only way to get sequence numbers/timing information. This ioctl should NOT be implemented in the compatibility layer. Instead, the functionality _must_ be added to the formal v4l1 API in some way, and then implemented. -justin
