ioctl VIDIOC_DV_TIMINGS_CAP
&manvol;

# VIDIOC_DV_TIMINGS_CAP

The capabilities of the Digital Video receiver/transmitter

    	int ioctl
    	int fd
    	int request
    	struct v4l2_dv_timings_cap *argp

## Arguments

`fd`

  &fd;

`request`

  VIDIOC_DV_TIMINGS_CAP

`argp`

## Description

### Experimental

This is an experimental interface and may change in the future.

To query the capabilities of the DV receiver/transmitter applications can call this ioctl and the driver will fill in the structure. Note that drivers may return different values after switching the video input or output.

### struct v4l2_bt_timings_cap

&cs-str;
__u32 | min_width | Minimum width of the active video in pixels.
__u32 | max_width | Maximum width of the active video in pixels.
__u32 | min_height | Minimum height of the active video in lines.
__u32 | max_height | Maximum height of the active video in lines.
__u64 | min_pixelclock | Minimum pixelclock frequency in Hz.
__u64 | max_pixelclock | Maximum pixelclock frequency in Hz.
__u32 | standards | The video standard(s) supported by the hardware. See for a list of standards.
__u32 | capabilities | Several flags giving more information about the capabilities. See for a description of the flags.
__u32 | reserved[16] | Reserved for future extensions. Drivers must set the array to zero.

### struct v4l2_dv_timings_cap

&cs-str;
__u32 | type | Type of DV timings as listed in .
__u32 | reserved[3] | Reserved for future extensions. Drivers must set the array to zero.
union |  |
| &v4l2-bt-timings-cap; | bt | BT.656/1120 timings capabilities of the hardware.
| __u32 | raw_data[32] |

### DV BT Timing capabilities

&cs-str;
Flag | Description
V4L2_DV_BT_CAP_INTERLACED | Interlaced formats are supported.
V4L2_DV_BT_CAP_PROGRESSIVE | Progressive formats are supported.
V4L2_DV_BT_CAP_REDUCED_BLANKING | CVT/GTF specific: the timings can make use of reduced blanking (CVT) or the 'Secondary GTF' curve (GTF).
V4L2_DV_BT_CAP_CUSTOM | Can support non-standard timings, i.e. timings not belonging to the standards set in the standards field.

&return-value;