Ronald Bultje wrote: > Hi Brian, > > On Thu, 2002-08-22 at 10:17, Brian W Grasby wrote: > > where vFrq is a struct v4l2_frequency > > The BTTV driver (0.8) uses an integer as argument, not a struct > v4l2_frequency. Use the latest BTTV-0.8 from http://bytesex.org/bttv/ > and use an integer instead of the struct: Well, there are *two* ioctls for tuning a frequency. One is VIDIOC_S_FREQ which takes an integer and the other is VIDIOC_G_FREQUENCY which takes struct v4l2_frequency: bogomips kraxel ~/kernel/v4l2# grep FREQ videodev2.h #define VIDIOC_G_FREQ _IOR ('V', 31, int) #define VIDIOC_S_FREQ _IOWR ('V', 32, int) #define VIDIOC_G_FREQUENCY _IOWR ('V', 56, struct v4l2_frequency) #define VIDIOC_S_FREQUENCY _IOW ('V', 57, struct v4l2_frequency) > integer freq = <some_number>; > ioctl(fd, VIDIOC_S_FREQ, &freq); That should work, yes. bttv simply doesn't support VIDIOC_G_FREQUENCY (yet). > You can set the input for this tuner using VIDIOC_S_TUNER. VIDIOC_G_FREQUENCY doesn't switch inputs. It was added to handle cards with multiple tuners correctly, and the tuners are refered by the input they are connected to. Gerd -- You can't please everybody. And usually if you _try_ to please everybody, the end result is one big mess. -- Linus Torvalds, 2002-04-20
