Driver and device

#define CAPTURE_PROPERTY_DEVICE_INFO CAPTURE_PROPERTY( 'Q', 'I', 'N', 'F' )

Return string information about the video capture driver and device; all drivers support this property.

The content of this property depends on the device that's set in CAPTURE_PROPERTY_DEVICE property.

Read const char *

#define CAPTURE_ENABLE CAPTURE_PROPERTY( 'Q', 'E', 'N', 'A' )

Capture start(1) and stop(0)

Read/Write uint32_t

#define CAPTURE_REINIT CAPTURE_PROPERTY( 'Q', 'R', 'I', 'N' )

Try to reinitialize capture hardware after being written.

Reinitialization might be needed after certain device state changes. Generally, capture drivers handle the reinitialization on their own, but in some corner cases, such as coordination between multiple capture devices, you may use this property directly.

Write uint32_t (0 or a device-specific value)

#define CAPTURE_PROPERTY_NDEVICES CAPTURE_PROPERTY( 'Q', 'N', 'D', 'V' )

Number of supported capture units A capture driver can support a number of devices (CAPTURE_PROPERTY_NDEVICES); each device has at least one input (CAPTURE_PROPERTY_NSOURCES).

Selection of the input is done by choosing a device, and then a source.

Read uint32_t

#define CAPTURE_PROPERTY_DEVICE CAPTURE_PROPERTY( 'Q', 'D', 'E', 'V' )

Capture device in this context.

Once set, on some drivers, this property cannot be changed.

Read/Write uint32_t

#define CAPTURE_PROPERTY_NSOURCES CAPTURE_PROPERTY( 'Q', 'N', 'S', 'R' )

Number of source inputs available after the device is set.

Read uint32_t

#define CAPTURE_PROPERTY_CONTRAST CAPTURE_PROPERTY( 'Q', 'C', 'O', 'N' )

Contrast (-128 to 127)

Read/Write int32_t

#define CAPTURE_PROPERTY_BRIGHTNESS CAPTURE_PROPERTY( 'Q', 'B', 'R', 'I' )

Brightness (-128 to 127)

Read/Write int32_t

#define CAPTURE_PROPERTY_SATURATION CAPTURE_PROPERTY( 'Q', 'S', 'A', 'T' )

Color saturation (-128 to 127)

Read/Write int32_t

#define CAPTURE_PROPERTY_HUE CAPTURE_PROPERTY( 'Q', 'H', 'U', 'E' )

Color hue (-128 to 127)

Read/Write int32_t

#define CAPTURE_PROPERTY_SHARPNESS CAPTURE_PROPERTY( 'Q', 'S', 'R', 'P' )

Sharpness (-128 to 127); where an image is blurred at -128 to the sharpest at 127.

Read/Write int32_t

#define CAPTURE_PROPERTY_DEINTERLACE_FLAGS CAPTURE_PROPERTY( 'Q', 'D', 'E', 'I' )

Deinterlacing flags (bit-field)

Use CAPTURE_DEI_WEAVE_FLAG_BOTTOM_TOP

Read/Write uint32_t

#define CAPTURE_DEI_WEAVE_FLAG_BOTTOM_TOP (1 << 0)

Used to specify the field order for weave deinterlacing.

When set, the weave order is to always weave bottom + top, possibly dropping an unexpected first top field. When not set, the weave order is to always weave top + bottom, possibly dropping an unexpected first bottom field.

#define CAPTURE_PROPERTY_DEINTERLACE_MODE CAPTURE_PROPERTY( 'Q', 'D', 'E', 'M' )

Deinterlacing mode; refer to Deinterlacing mode types.

Read/Write uint32_t

#define CAPTURE_PROPERTY_NO_SIGNAL_MODE CAPTURE_PROPERTY( 'Q', 'N', 'O', 'S' )

No signal mode; set default action if "no carrier" or "no signal" state is detected.

Refer to No signal mode types. Read/Write uint32_t

#define CAPTURE_PROPERTY_SRC_INDEX CAPTURE_PROPERTY( 'Q', 'S', 'I', 'D' )

Video capture unit of the device.

Read/Write uint32_t