The video capture API includes constants that specify the video capture video frame properties.
#define CAPTURE_PROPERTY_FRAME_NBUFFERS CAPTURE_PROPERTY( 'Q', 'F', 'B', 'N' )
Number of frame buffers that have been specified in CAPTURE_PROPERTY_FRAME_BUFFERS.
Read/Write uint32_t
#define CAPTURE_PROPERTY_FRAME_BUFFERS CAPTURE_PROPERTY( 'Q', 'F', 'B', 'A' )
Pointers to the video capture buffers.
Read/Write [] void*
#define CAPTURE_PROPERTY_FRAME_TIMESTAMP CAPTURE_PROPERTY( 'Q', 'F', 'B', 'T' )
An array of CLOCK_MONOTONIC timestamps indexed by the buffer index.
Read [] uint64_t
#define CAPTURE_PROPERTY_FRAME_TIMECODE CAPTURE_PROPERTY( 'Q', 'F', 'B', 'C' )
An array of SMPTE (Society of Motion Picture and Television Engineers) timecodes indexed by the buffer index; used for streams with metadata.
#define CAPTURE_PROPERTY_FRAME_SEQNO CAPTURE_PROPERTY( 'Q', 'F', 'B', 'S' )
An array of frame sequence numbers indexed by the buffer index.
Read [] uint32_t
#define CAPTURE_PROPERTY_FRAME_FLAGS CAPTURE_PROPERTY( 'Q', 'F', 'B', 'F' )
An array of frame flags indexed by the buffer index.
Read [] uint32_t
#define CAPTURE_PROPERTY_FRAME_NBYTES CAPTURE_PROPERTY( 'Q', 'F', 'B', 'B' )
An array of frame sizes, in bytes, indexed by the buffer index.
Read/Write [] uint32_t
#define CAPTURE_FRAME_FLAG_ERROR 0x0001
There is an error in the frame.
#define CAPTURE_FRAME_FLAG_INTERLACED 0x0002
Frame is interlaced.
For more information about interlacing, refer to Deinterlacing mode types.
#define CAPTURE_FRAME_FLAG_FIELD_BOTTOM 0x0004
Indicator of the video frame field received.
When the video uses interlacing (i.e., CAPTURE_FRAME_FLAG_INTERLACED is set), then when the bottom field (even line numbers) is received, CAPTURE_FRAME_FLAG_FIELD_BOTTOM is set. When the top field (odd line numbers) is received, CAPTURE_FRAME_FLAG_FIELD_BOTTOM is unset.
#define CAPTURE_FRAME_FLAG_SHORT 0x0008
Indicator that the frame or field is shorter than expected.
an incorrect selection of analog broadcast standard (e.g., the hardware is expecting a PAL 576i signal, but an NTSC 480i is used instead)
an incomplete frame