video

package
v1.3.4 Latest Latest
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 Go to latest Published: Sep 13, 2024 License: LGPL-2.1 Imports: 9 Imported by: 0

Documentation

Overview

Package video contains bindings for the gstvideo C API.

Index

Constants

View Source 
const (
	TagVideoColorspage  gst.Tag = C.GST_META_TAG_VIDEO_COLORSPACE_STR
	TagVideoOrientation gst.Tag = C.GST_META_TAG_VIDEO_ORIENTATION_STR
	TagVideoSize        gst.Tag = C.GST_META_TAG_VIDEO_SIZE_STR
	TagVideo            gst.Tag = C.GST_META_TAG_VIDEO_STR
)

Additional video meta tags

View Source 
const (
	ColorimetryBT2020    string = C.GST_VIDEO_COLORIMETRY_BT2020
	ColorimetryBT202010  string = C.GST_VIDEO_COLORIMETRY_BT2020_10
	ColorimetryBT2100HLG string = C.GST_VIDEO_COLORIMETRY_BT2100_HLG
	ColorimetryBT2100PQ  string = C.GST_VIDEO_COLORIMETRY_BT2100_PQ
	ColorimetryBT601     string = C.GST_VIDEO_COLORIMETRY_BT601
	ColorimetryBT709     string = C.GST_VIDEO_COLORIMETRY_BT709
	ColorimetrySMPTE240M string = C.GST_VIDEO_COLORIMETRY_SMPTE240M
	ColorimetrySRRGB     string = C.GST_VIDEO_COLORIMETRY_SRGB
)

Pre-defined colorimetries

View Source 
const CapsFeatureFormatInterlaced string = C.GST_CAPS_FEATURE_FORMAT_INTERLACED

CapsFeatureFormatInterlaced is the name of the caps feature indicating that the stream is interlaced.

Currently it is only used for video with 'interlace-mode=alternate' to ensure backwards compatibility for this new mode. In this mode each buffer carries a single field of interlaced video. BufferFlagTopField and BufferFlagBottomField indicate whether the buffer carries a top or bottom field. The order of buffers/fields in the stream and the timestamps on the buffers indicate the temporal order of the fields. Top and bottom fields are expected to alternate in this mode. The frame rate in the caps still signals the frame rate, so the notional field rate will be twice the frame rate from the caps.

Variables

View Source 
var TypeFormat = glib.Type(C.gst_video_format_get_type())

TypeFormat is the GType for a GstVideoFormat.

Functions

func CalculateDisplayRatio 

func CalculateDisplayRatio(videoWidth, videoHeight, videoParNum, videoParDenom, displayParNum, displayParDenom uint) (darNum, darDenom uint, ok bool)

CalculateDisplayRatio will, given the Pixel Aspect Ratio and size of an input video frame, and the pixel aspect ratio of the intended display device, calculate the actual display ratio the video will be rendered with.

See https://gstreamer.freedesktop.org/documentation/video/gstvideo.html?gi-language=c#gst_video_calculate_display_ratio

func ConvertSample 

func ConvertSample(sample *gst.Sample, toCaps *gst.Caps, timeout gst.ClockTime) (*gst.Sample, error)

ConvertSample converts a raw video buffer into the specified output caps.

The output caps can be any raw video formats or any image formats (jpeg, png, ...).

The width, height and pixel-aspect-ratio can also be specified in the output caps.

func ConvertSampleAsync 

func ConvertSampleAsync(sample *gst.Sample, toCaps *gst.Caps, timeout gst.ClockTime, cb ConvertSampleCallback)

ConvertSampleAsync converts a raw video buffer into the specified output caps.

The output caps can be any raw video formats or any image formats (jpeg, png, ...).

The width, height and pixel-aspect-ratio can also be specified in the output caps.

The callback will be called after conversion, when an error occurred or if conversion didn't finish after timeout.

func GuessFramerate 

func GuessFramerate(dur gst.ClockTime) (destNum, destDenom int, ok bool)

GuessFramerate will, given the nominal duration of one video frame, check some standard framerates for a close match (within 0.1%) and return one if possible,

It will calculate an arbitrary framerate if no close match was found, and return FALSE.

It returns FALSE if a duration of 0 is passed.

func MakeRawCaps 

func MakeRawCaps(formats []Format) *gst.Caps

MakeRawCaps returns a generic raw video caps for formats defined in formats. If formats is empty or nil, returns a caps for all the supported raw video formats, see RawFormats.

func MakeRawCapsWithFeatures 

func MakeRawCapsWithFeatures(formats []Format, features *gst.CapsFeatures) *gst.Caps

MakeRawCapsWithFeatures returns a generic raw video caps for formats defined in formats with features. If formats is empty or nil, returns a caps for all the supported video formats, see RawFormats.

Types

type Alignment 

type Alignment struct {
	// extra pixels on the top
	PaddingTop uint
	// extra pixels on bottom
	PaddingBottom uint
	// extra pixels on the left
	PaddingLeft uint
	// extra pixels on the right
	PaddingRight uint
}

Alignment represents parameters for the memory of video buffers. This structure is usually used to configure the bufferpool if it supports the BufferPoolOptionVideoAlignment.

type ChromaFlags 

type ChromaFlags int

ChromaFlags are extra flags that influence the result from NewChromaResample. 

const (
	ChromaFlagNone       ChromaFlags = C.GST_VIDEO_CHROMA_FLAG_NONE       // (0) – no flags
	ChromaFlagInterlaced ChromaFlags = C.GST_VIDEO_CHROMA_FLAG_INTERLACED // (1) – the input is interlaced
)

Type castings

type ChromaMethod 

type ChromaMethod int

ChromaMethod represents different subsampling and upsampling methods. 

const (
	ChromaMethodNearest ChromaMethod = C.GST_VIDEO_CHROMA_METHOD_NEAREST // (0) – Duplicates the chroma samples when upsampling and drops when subsampling
	ChromaMethodLinear  ChromaMethod = C.GST_VIDEO_CHROMA_METHOD_LINEAR  // (1) – Uses linear interpolation to reconstruct missing chroma and averaging to subsample
)

Type castings

type ChromaResample 

type ChromaResample struct {
	// contains filtered or unexported fields
}

ChromaResample is a utility object for resampling chroma planes and converting between different chroma sampling sitings.

func NewChromaResample 

func NewChromaResample(method ChromaMethod, site ChromaSite, flags ChromaFlags, format Format, hFactor, vFactor int) *ChromaResample

NewChromaResample creates a new resampler object for the given parameters. When h_factor or v_factor is > 0, upsampling will be used, otherwise subsampling is performed.

func (*ChromaResample) GetInfo 

func (c *ChromaResample) GetInfo() (nLines uint, offset int)

GetInfo returns the info about the Resample. The resampler must be fed n_lines at a time. The first line should be at offset.

type ChromaSite 

type ChromaSite int

ChromaSite represents various Chroma sitings. 

const (
	ChromaSiteUnknown  ChromaSite = C.GST_VIDEO_CHROMA_SITE_UNKNOWN   // (0) – unknown cositing
	ChromaSiteNone     ChromaSite = C.GST_VIDEO_CHROMA_SITE_NONE      // (1) – no cositing
	ChromaSiteHCosited ChromaSite = C.GST_VIDEO_CHROMA_SITE_H_COSITED // (2) – chroma is horizontally cosited
	ChromaSiteVCosited ChromaSite = C.GST_VIDEO_CHROMA_SITE_V_COSITED // (4) – chroma is vertically cosited
	ChromaSiteAltLine  ChromaSite = C.GST_VIDEO_CHROMA_SITE_ALT_LINE  // (8) – choma samples are sited on alternate lines
	ChromaSiteCosited  ChromaSite = C.GST_VIDEO_CHROMA_SITE_COSITED   // (6) – chroma samples cosited with luma samples
	ChromaSiteJpeg     ChromaSite = C.GST_VIDEO_CHROMA_SITE_JPEG      // (1) – jpeg style cositing, also for mpeg1 and mjpeg
	ChromaSiteMpeg2    ChromaSite = C.GST_VIDEO_CHROMA_SITE_MPEG2     // (2) – mpeg2 style cositing
	ChromaSiteDV       ChromaSite = C.GST_VIDEO_CHROMA_SITE_DV        // (14) – DV style cositing
)

Type castings

func (ChromaSite) String 

func (c ChromaSite) String() string

String implements a stringer on ChromaSite.

type ColorBalance 

type ColorBalance interface {
	// Get the ColorBalanceType of this implementation.
	GetBalanceType() ColorBalanceType
	// Retrieve the current value of the indicated channel, between MinValue and MaxValue.
	GetValue(*ColorBalanceChannel) int
	// Retrieve a list of the available channels.
	ListChannels() []*ColorBalanceChannel
	// Sets the current value of the channel to the passed value, which must be between MinValue
	// and MaxValue.
	SetValue(*ColorBalanceChannel, int)
}

ColorBalance is an interface implemented by elements which can perform some color balance operation on video frames they process. For example, modifying the brightness, contrast, hue or saturation.

Example elements are 'xvimagesink' and 'colorbalance'

func ColorBalanceFromElement 

func ColorBalanceFromElement(element *gst.Element) ColorBalance

ColorBalanceFromElement checks if the given element implements the ColorBalance interface, and if so, returns a usable interface. This currently only supports elements created from the C runtime.

type ColorBalanceChannel 

type ColorBalanceChannel struct {
	// A string containing a descriptive name for this channel
	Label string
	// The minimum valid value for this channel.
	MinValue int
	// The maximum valid value for this channel.
	MaxValue int
}

ColorBalanceChannel represents parameters for modifying the color balance implemented by an element providing the GstColorBalance interface. For example, Hue or Saturation.

type ColorBalanceType 

type ColorBalanceType int

ColorBalanceType is an enumeration indicating whether an element implements color balancing operations in software or in dedicated hardware. In general, dedicated hardware implementations (such as those provided by xvimagesink) are preferred. 

const (
	ColorBalanceHardware ColorBalanceType = C.GST_COLOR_BALANCE_HARDWARE // (0) – Color balance is implemented with dedicated hardware.
	ColorBalanceSoftware ColorBalanceType = C.GST_COLOR_BALANCE_SOFTWARE // (1) – Color balance is implemented via software processing.
)

Type castings

type ColorMatrix 

type ColorMatrix int

ColorMatrix is used to convert between Y'PbPr and non-linear RGB (R'G'B') 

const (
	ColorMatrixUnknown   ColorMatrix = C.GST_VIDEO_COLOR_MATRIX_UNKNOWN   // (0) – unknown matrix
	ColorMatrixRGB       ColorMatrix = C.GST_VIDEO_COLOR_MATRIX_RGB       // (1) – identity matrix. Order of coefficients is actually GBR, also IEC 61966-2-1 (sRGB)
	ColorMatrixFCC       ColorMatrix = C.GST_VIDEO_COLOR_MATRIX_FCC       // (2) – FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
	ColorMatrixBT709     ColorMatrix = C.GST_VIDEO_COLOR_MATRIX_BT709     // (3) – ITU-R BT.709 color matrix, also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
	ColorMatrixBT601     ColorMatrix = C.GST_VIDEO_COLOR_MATRIX_BT601     // (4) – ITU-R BT.601 color matrix, also SMPTE170M / ITU-R BT1358 525 / ITU-R BT1700 NTSC
	ColorMatrixSMPTE240M ColorMatrix = C.GST_VIDEO_COLOR_MATRIX_SMPTE240M // (5) – SMPTE 240M color matrix
	ColorMatrixBT2020    ColorMatrix = C.GST_VIDEO_COLOR_MATRIX_BT2020    // (6) – ITU-R BT.2020 color matrix. Since: 1.6
)

Type castings

type ColorPrimaries 

type ColorPrimaries int

ColorPrimaries define the how to transform linear RGB values to and from the CIE XYZ colorspace. 

const (
	ColorPrimariesUnknown    ColorPrimaries = C.GST_VIDEO_COLOR_PRIMARIES_UNKNOWN    // (0) – unknown color primaries
	ColorPrimariesBT709      ColorPrimaries = C.GST_VIDEO_COLOR_PRIMARIES_BT709      // (1) – BT709 primaries, also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
	ColorPrimariesBT470M     ColorPrimaries = C.GST_VIDEO_COLOR_PRIMARIES_BT470M     // (2) – BT470M primaries, also FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
	ColorPrimariesBT470BG    ColorPrimaries = C.GST_VIDEO_COLOR_PRIMARIES_BT470BG    // (3) – BT470BG primaries, also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
	ColorPrimariesSMPTE170M  ColorPrimaries = C.GST_VIDEO_COLOR_PRIMARIES_SMPTE170M  // (4) – SMPTE170M primaries, also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
	ColorPrimariesSMPTE240M  ColorPrimaries = C.GST_VIDEO_COLOR_PRIMARIES_SMPTE240M  // (5) – SMPTE240M primaries
	ColorPrimariesFilm       ColorPrimaries = C.GST_VIDEO_COLOR_PRIMARIES_FILM       // (6) – Generic film (color filters using Illuminant C)
	ColorPrimariesBT2020     ColorPrimaries = C.GST_VIDEO_COLOR_PRIMARIES_BT2020     // (7) – ITU-R BT2020 primaries. Since: 1.6
	ColorPrimariesAdobeRGB   ColorPrimaries = C.GST_VIDEO_COLOR_PRIMARIES_ADOBERGB   // (8) – Adobe RGB primaries. Since: 1.8
	ColorPrimariesSMPTEST428 ColorPrimaries = C.GST_VIDEO_COLOR_PRIMARIES_SMPTEST428 // (9) – SMPTE ST 428 primaries (CIE 1931 XYZ). Since: 1.16
	ColorPrimariesSMPTERP431 ColorPrimaries = C.GST_VIDEO_COLOR_PRIMARIES_SMPTERP431 // (10) – SMPTE RP 431 primaries (ST 431-2 (2011) / DCI P3). Since: 1.16
	ColorPrimariesSMPTEEG432 ColorPrimaries = C.GST_VIDEO_COLOR_PRIMARIES_SMPTEEG432 // (11) – SMPTE EG 432 primaries (ST 432-1 (2010) / P3 D65). Since: 1.16
	ColorPrimariesEBU3213    ColorPrimaries = C.GST_VIDEO_COLOR_PRIMARIES_EBU3213    // (12) – EBU 3213 primaries (JEDEC P22 phosphors). Since: 1.16
)

Type castings

type ColorPrimariesInfo 

type ColorPrimariesInfo struct {
	Primaries ColorPrimaries
	Wx, Wy    float64 // Reference white coordinates
	Rx, Ry    float64 // Red coordinates
	Gx, Gy    float64 // Green coordinates
	Bx, By    float64 // Blue coordinates
}

ColorPrimariesInfo is a structure describing the chromaticity coordinates of an RGB system. These values can be used to construct a matrix to transform RGB to and from the XYZ colorspace.

type ColorRange 

type ColorRange int

ColorRange represents possible color range values. These constants are defined for 8 bit color values and can be scaled for other bit depths. 

const (
	ColorRangeUnknown ColorRange = C.GST_VIDEO_COLOR_RANGE_UNKNOWN // (0) – unknown range
	ColorRange0255    ColorRange = C.GST_VIDEO_COLOR_RANGE_0_255   // (1) – [0..255] for 8 bit components
	ColorRange16235   ColorRange = C.GST_VIDEO_COLOR_RANGE_16_235  // (2) – [16..235] for 8 bit components. Chroma has [16..240] range.
)

Type castings

type Colorimetry 

type Colorimetry struct {
	// The color range. This is the valid range for the samples. It is used to convert the samples to Y'PbPr values.
	Range ColorRange
	// The color matrix. Used to convert between Y'PbPr and non-linear RGB (R'G'B').
	Matrix ColorMatrix
	// The transfer function. used to convert between R'G'B' and RGB.
	Transfer TransferFunction
	// Color primaries. used to convert between R'G'B' and CIE XYZ.
	Primaries ColorPrimaries
}

Colorimetry is a structure describing the color info.

type ConvertSampleCallback 

type ConvertSampleCallback func(*gst.Sample, error)

ConvertSampleCallback represents a callback from a video convert opereration. It contains the converted sample or any error that occurred.

type CropMetaInfo 

type CropMetaInfo struct {
	// contains filtered or unexported fields
}

CropMetaInfo contains extra buffer metadata describing image cropping.

func GetCropMetaInfo 

func GetCropMetaInfo() *CropMetaInfo

GetCropMetaInfo returns the default CropMetaInfo.

func (*CropMetaInfo) Height 

func (c *CropMetaInfo) Height() uint

Height returns the cropped height.

func (*CropMetaInfo) Instance 

func (c *CropMetaInfo) Instance() *C.GstVideoCropMeta

Instance returns the underlying C GstVideoCropMeta instance.

func (*CropMetaInfo) Meta 

func (c *CropMetaInfo) Meta() *gst.Meta

Meta returns the parent Meta instance.

func (*CropMetaInfo) Width 

func (c *CropMetaInfo) Width() uint

Width returns the cropped width.

func (*CropMetaInfo) X 

func (c *CropMetaInfo) X() uint

X returns the horizontal offset.

func (*CropMetaInfo) Y 

func (c *CropMetaInfo) Y() uint

Y returns the vertical offset.

type FieldOrder 

type FieldOrder int

FieldOrder is the field order of interlaced content. This is only valid for interlace-mode=interleaved and not interlace-mode=mixed. In the case of mixed or FieldOrderrUnknown, the field order is signaled via buffer flags. 

const (
	FieldOrderUnknown          FieldOrder = C.GST_VIDEO_FIELD_ORDER_UNKNOWN            // (0) – unknown field order for interlaced content. The actual field order is signaled via buffer flags.
	FieldOrderTopFieldFirst    FieldOrder = C.GST_VIDEO_FIELD_ORDER_TOP_FIELD_FIRST    // (1) – top field is first
	FieldOrderBottomFieldFirst FieldOrder = C.GST_VIDEO_FIELD_ORDER_BOTTOM_FIELD_FIRST // (2) – bottom field is first
)

Type castings

func (FieldOrder) String 

func (f FieldOrder) String() string

String implements a stringer on FieldOrder

type Flags 

type Flags int

Flags represents extra video flags 

const (
	FlagNone               Flags = C.GST_VIDEO_FLAG_NONE                // (0) – no flags
	FlagVariableFPS        Flags = C.GST_VIDEO_FLAG_VARIABLE_FPS        // (1) – a variable fps is selected, fps_n and fps_d denote the maximum fps of the video
	FlagPremultipliedAlpha Flags = C.GST_VIDEO_FLAG_PREMULTIPLIED_ALPHA // (2) – Each color has been scaled by the alpha value.
)

Type castings

type Format 

type Format int

Format is an enum value describing the most common video formats. 

const (
	FormatUnknown    Format = C.GST_VIDEO_FORMAT_UNKNOWN     // (0) – Unknown or unset video format id
	FormatEncoded    Format = C.GST_VIDEO_FORMAT_ENCODED     // (1) – Encoded video format. Only ever use that in caps for special video formats in combination with non-system memory GstCapsFeatures where it does not make sense to specify a real video format.
	FormatI420       Format = C.GST_VIDEO_FORMAT_I420        // (2) – planar 4:2:0 YUV
	FormatYV12       Format = C.GST_VIDEO_FORMAT_YV12        // (3) – planar 4:2:0 YVU (like I420 but UV planes swapped)
	FormatYUY2       Format = C.GST_VIDEO_FORMAT_YUY2        // (4) – packed 4:2:2 YUV (Y0-U0-Y1-V0 Y2-U2-Y3-V2 Y4 ...)
	FormatUYVY       Format = C.GST_VIDEO_FORMAT_UYVY        // (5) – packed 4:2:2 YUV (U0-Y0-V0-Y1 U2-Y2-V2-Y3 U4 ...)
	FormatAYUV       Format = C.GST_VIDEO_FORMAT_AYUV        // (6) – packed 4:4:4 YUV with alpha channel (A0-Y0-U0-V0 ...)
	FormatRGBx       Format = C.GST_VIDEO_FORMAT_RGBx        // (7) – sparse rgb packed into 32 bit, space last
	FormatBGRx       Format = C.GST_VIDEO_FORMAT_BGRx        // (8) – sparse reverse rgb packed into 32 bit, space last
	FormatxRGB       Format = C.GST_VIDEO_FORMAT_xRGB        // (9) – sparse rgb packed into 32 bit, space first
	FormatxBGR       Format = C.GST_VIDEO_FORMAT_xBGR        // (10) – sparse reverse rgb packed into 32 bit, space first
	FormatRGBA       Format = C.GST_VIDEO_FORMAT_RGBA        // (11) – rgb with alpha channel last
	FormatBGRA       Format = C.GST_VIDEO_FORMAT_BGRA        // (12) – reverse rgb with alpha channel last
	FormatARGB       Format = C.GST_VIDEO_FORMAT_ARGB        // (13) – rgb with alpha channel first
	FormatABGR       Format = C.GST_VIDEO_FORMAT_ABGR        // (14) – reverse rgb with alpha channel first
	FormatRGB        Format = C.GST_VIDEO_FORMAT_RGB         // (15) – RGB packed into 24 bits without padding (R-G-B-R-G-B)
	FormatBGR        Format = C.GST_VIDEO_FORMAT_BGR         // (16) – reverse RGB packed into 24 bits without padding (B-G-R-B-G-R)
	FormatY41B       Format = C.GST_VIDEO_FORMAT_Y41B        // (17) – planar 4:1:1 YUV
	FormatY42B       Format = C.GST_VIDEO_FORMAT_Y42B        // (18) – planar 4:2:2 YUV
	FormatYVYU       Format = C.GST_VIDEO_FORMAT_YVYU        // (19) – packed 4:2:2 YUV (Y0-V0-Y1-U0 Y2-V2-Y3-U2 Y4 ...)
	FormatY444       Format = C.GST_VIDEO_FORMAT_Y444        // (20) – planar 4:4:4 YUV
	Formatv210       Format = C.GST_VIDEO_FORMAT_v210        // (21) – packed 4:2:2 10-bit YUV, complex format
	Formatv216       Format = C.GST_VIDEO_FORMAT_v216        // (22) – packed 4:2:2 16-bit YUV, Y0-U0-Y1-V1 order
	FormatNV12       Format = C.GST_VIDEO_FORMAT_NV12        // (23) – planar 4:2:0 YUV with interleaved UV plane
	FormatNV21       Format = C.GST_VIDEO_FORMAT_NV21        // (24) – planar 4:2:0 YUV with interleaved VU plane
	FormatGray8      Format = C.GST_VIDEO_FORMAT_GRAY8       // (25) – 8-bit grayscale
	FormatGray16BE   Format = C.GST_VIDEO_FORMAT_GRAY16_BE   // (26) – 16-bit grayscale, most significant byte first
	FormatGray16LE   Format = C.GST_VIDEO_FORMAT_GRAY16_LE   // (27) – 16-bit grayscale, least significant byte first
	Formatv308       Format = C.GST_VIDEO_FORMAT_v308        // (28) – packed 4:4:4 YUV (Y-U-V ...)
	FormatRGB16      Format = C.GST_VIDEO_FORMAT_RGB16       // (29) – rgb 5-6-5 bits per component
	FormatBGR16      Format = C.GST_VIDEO_FORMAT_BGR16       // (30) – reverse rgb 5-6-5 bits per component
	FormatRGB15      Format = C.GST_VIDEO_FORMAT_RGB15       // (31) – rgb 5-5-5 bits per component
	FormatBGR15      Format = C.GST_VIDEO_FORMAT_BGR15       // (32) – reverse rgb 5-5-5 bits per component
	FormatUYVP       Format = C.GST_VIDEO_FORMAT_UYVP        // (33) – packed 10-bit 4:2:2 YUV (U0-Y0-V0-Y1 U2-Y2-V2-Y3 U4 ...)
	FormatA420       Format = C.GST_VIDEO_FORMAT_A420        // (34) – planar 4:4:2:0 AYUV
	FormatRGB8P      Format = C.GST_VIDEO_FORMAT_RGB8P       // (35) – 8-bit paletted RGB
	FormatYUV9       Format = C.GST_VIDEO_FORMAT_YUV9        // (36) – planar 4:1:0 YUV
	FormatYVU9       Format = C.GST_VIDEO_FORMAT_YVU9        // (37) – planar 4:1:0 YUV (like YUV9 but UV planes swapped)
	FormatIYU1       Format = C.GST_VIDEO_FORMAT_IYU1        // (38) – packed 4:1:1 YUV (Cb-Y0-Y1-Cr-Y2-Y3 ...)
	FormatARGB64     Format = C.GST_VIDEO_FORMAT_ARGB64      // (39) – rgb with alpha channel first, 16 bits per channel
	FormatAYUV64     Format = C.GST_VIDEO_FORMAT_AYUV64      // (40) – packed 4:4:4 YUV with alpha channel, 16 bits per channel (A0-Y0-U0-V0 ...)
	Formatr210       Format = C.GST_VIDEO_FORMAT_r210        // (41) – packed 4:4:4 RGB, 10 bits per channel
	FormatI42010BE   Format = C.GST_VIDEO_FORMAT_I420_10BE   // (42) – planar 4:2:0 YUV, 10 bits per channel
	FormatI42010LE   Format = C.GST_VIDEO_FORMAT_I420_10LE   // (43) – planar 4:2:0 YUV, 10 bits per channel
	FormatI42210BE   Format = C.GST_VIDEO_FORMAT_I422_10BE   // (44) – planar 4:2:2 YUV, 10 bits per channel
	FormatI42210LE   Format = C.GST_VIDEO_FORMAT_I422_10LE   // (45) – planar 4:2:2 YUV, 10 bits per channel
	FormatY44410BE   Format = C.GST_VIDEO_FORMAT_Y444_10BE   // (46) – planar 4:4:4 YUV, 10 bits per channel (Since: 1.2)
	FormatY44410LE   Format = C.GST_VIDEO_FORMAT_Y444_10LE   // (47) – planar 4:4:4 YUV, 10 bits per channel (Since: 1.2)
	FormatGBR        Format = C.GST_VIDEO_FORMAT_GBR         // (48) – planar 4:4:4 RGB, 8 bits per channel (Since: 1.2)
	FormatGBR10BE    Format = C.GST_VIDEO_FORMAT_GBR_10BE    // (49) – planar 4:4:4 RGB, 10 bits per channel (Since: 1.2)
	FormatGBR10LE    Format = C.GST_VIDEO_FORMAT_GBR_10LE    // (50) – planar 4:4:4 RGB, 10 bits per channel (Since: 1.2)
	FormatNV16       Format = C.GST_VIDEO_FORMAT_NV16        // (51) – planar 4:2:2 YUV with interleaved UV plane (Since: 1.2)
	FormatNV24       Format = C.GST_VIDEO_FORMAT_NV24        // (52) – planar 4:4:4 YUV with interleaved UV plane (Since: 1.2)
	FormatNV1264Z32  Format = C.GST_VIDEO_FORMAT_NV12_64Z32  // (53) – NV12 with 64x32 tiling in zigzag pattern (Since: 1.4)
	FormatA42010BE   Format = C.GST_VIDEO_FORMAT_A420_10BE   // (54) – planar 4:4:2:0 YUV, 10 bits per channel (Since: 1.6)
	FormatA42010LE   Format = C.GST_VIDEO_FORMAT_A420_10LE   // (55) – planar 4:4:2:0 YUV, 10 bits per channel (Since: 1.6)
	FormatA42210BE   Format = C.GST_VIDEO_FORMAT_A422_10BE   // (56) – planar 4:4:2:2 YUV, 10 bits per channel (Since: 1.6)
	FormatA42210LE   Format = C.GST_VIDEO_FORMAT_A422_10LE   // (57) – planar 4:4:2:2 YUV, 10 bits per channel (Since: 1.6)
	FormatA44410BE   Format = C.GST_VIDEO_FORMAT_A444_10BE   // (58) – planar 4:4:4:4 YUV, 10 bits per channel (Since: 1.6)
	FormatA44410LE   Format = C.GST_VIDEO_FORMAT_A444_10LE   // (59) – planar 4:4:4:4 YUV, 10 bits per channel (Since: 1.6)
	FormatNV61       Format = C.GST_VIDEO_FORMAT_NV61        // (60) – planar 4:2:2 YUV with interleaved VU plane (Since: 1.6)
	FormatP01010BE   Format = C.GST_VIDEO_FORMAT_P010_10BE   // (61) – planar 4:2:0 YUV with interleaved UV plane, 10 bits per channel (Since: 1.10)
	FormatP01010LE   Format = C.GST_VIDEO_FORMAT_P010_10LE   // (62) – planar 4:2:0 YUV with interleaved UV plane, 10 bits per channel (Since: 1.10)
	FormatIYU2       Format = C.GST_VIDEO_FORMAT_IYU2        // (63) – packed 4:4:4 YUV (U-Y-V ...) (Since: 1.10)
	FormatVYUY       Format = C.GST_VIDEO_FORMAT_VYUY        // (64) – packed 4:2:2 YUV (V0-Y0-U0-Y1 V2-Y2-U2-Y3 V4 ...)
	FormatGBRA       Format = C.GST_VIDEO_FORMAT_GBRA        // (65) – planar 4:4:4:4 ARGB, 8 bits per channel (Since: 1.12)
	FormatGBRA10BE   Format = C.GST_VIDEO_FORMAT_GBRA_10BE   // (66) – planar 4:4:4:4 ARGB, 10 bits per channel (Since: 1.12)
	FormatGBRA10LE   Format = C.GST_VIDEO_FORMAT_GBRA_10LE   // (67) – planar 4:4:4:4 ARGB, 10 bits per channel (Since: 1.12)
	FormatGBR12BE    Format = C.GST_VIDEO_FORMAT_GBR_12BE    // (68) – planar 4:4:4 RGB, 12 bits per channel (Since: 1.12)
	FormatGBR12LE    Format = C.GST_VIDEO_FORMAT_GBR_12LE    // (69) – planar 4:4:4 RGB, 12 bits per channel (Since: 1.12)
	FormatGBRA12BE   Format = C.GST_VIDEO_FORMAT_GBRA_12BE   // (70) – planar 4:4:4:4 ARGB, 12 bits per channel (Since: 1.12)
	FormatGBRA12LE   Format = C.GST_VIDEO_FORMAT_GBRA_12LE   // (71) – planar 4:4:4:4 ARGB, 12 bits per channel (Since: 1.12)
	FormatI42012BE   Format = C.GST_VIDEO_FORMAT_I420_12BE   // (72) – planar 4:2:0 YUV, 12 bits per channel (Since: 1.12)
	FormatI42012LE   Format = C.GST_VIDEO_FORMAT_I420_12LE   // (73) – planar 4:2:0 YUV, 12 bits per channel (Since: 1.12)
	FormatI42212BE   Format = C.GST_VIDEO_FORMAT_I422_12BE   // (74) – planar 4:2:2 YUV, 12 bits per channel (Since: 1.12)
	FormatI42212LE   Format = C.GST_VIDEO_FORMAT_I422_12LE   // (75) – planar 4:2:2 YUV, 12 bits per channel (Since: 1.12)
	FormatY44412BE   Format = C.GST_VIDEO_FORMAT_Y444_12BE   // (76) – planar 4:4:4 YUV, 12 bits per channel (Since: 1.12)
	FormatY44412LE   Format = C.GST_VIDEO_FORMAT_Y444_12LE   // (77) – planar 4:4:4 YUV, 12 bits per channel (Since: 1.12)
	FormatGray10LE32 Format = C.GST_VIDEO_FORMAT_GRAY10_LE32 // (78) – 10-bit grayscale, packed into 32bit words (2 bits padding) (Since: 1.14)
	FormatNV1210LE32 Format = C.GST_VIDEO_FORMAT_NV12_10LE32 // (79) – 10-bit variant of GST_VIDEO_FORMAT_NV12, packed into 32bit words (MSB 2 bits padding) (Since: 1.14)
	FormatNV1610LE32 Format = C.GST_VIDEO_FORMAT_NV16_10LE32 // (80) – 10-bit variant of GST_VIDEO_FORMAT_NV16, packed into 32bit words (MSB 2 bits padding) (Since: 1.14)
	FormatNV1210LE40 Format = C.GST_VIDEO_FORMAT_NV12_10LE40 // (81) – Fully packed variant of NV12_10LE32 (Since: 1.16)
	FormatY210       Format = C.GST_VIDEO_FORMAT_Y210        // (82) – packed 4:2:2 YUV, 10 bits per channel (Since: 1.16)
	FormatY410       Format = C.GST_VIDEO_FORMAT_Y410        // (83) – packed 4:4:4 YUV, 10 bits per channel(A-V-Y-U...) (Since: 1.16)
	FormatVUYA       Format = C.GST_VIDEO_FORMAT_VUYA        // (84) – packed 4:4:4 YUV with alpha channel (V0-U0-Y0-A0...) (Since: 1.16)
	FormatBGR10A2LE  Format = C.GST_VIDEO_FORMAT_BGR10A2_LE  // (85) – packed 4:4:4 RGB with alpha channel(B-G-R-A), 10 bits for R/G/B channel and MSB 2 bits for alpha channel (Since: 1.16)
	FormatRGB10A2LE  Format = C.GST_VIDEO_FORMAT_RGB10A2_LE  // (86) – packed 4:4:4 RGB with alpha channel(R-G-B-A), 10 bits for R/G/B channel and MSB 2 bits for alpha channel (Since: 1.18)
	FormatY44416BE   Format = C.GST_VIDEO_FORMAT_Y444_16BE   // (87) – planar 4:4:4 YUV, 16 bits per channel (Since: 1.18)
	FormatY44416LE   Format = C.GST_VIDEO_FORMAT_Y444_16LE   // (88) – planar 4:4:4 YUV, 16 bits per channel (Since: 1.18)
	FormatP016BE     Format = C.GST_VIDEO_FORMAT_P016_BE     // (89) – planar 4:2:0 YUV with interleaved UV plane, 16 bits per channel (Since: 1.18)
	FormatP016LE     Format = C.GST_VIDEO_FORMAT_P016_LE     // (90) – planar 4:2:0 YUV with interleaved UV plane, 16 bits per channel (Since: 1.18)
	FormatP012BE     Format = C.GST_VIDEO_FORMAT_P012_BE     // (91) – planar 4:2:0 YUV with interleaved UV plane, 12 bits per channel (Since: 1.18)
	FormatP012LE     Format = C.GST_VIDEO_FORMAT_P012_LE     // (92) – planar 4:2:0 YUV with interleaved UV plane, 12 bits per channel (Since: 1.18)
	FormatY212BE     Format = C.GST_VIDEO_FORMAT_Y212_BE     // (93) – packed 4:2:2 YUV, 12 bits per channel (Y-U-Y-V) (Since: 1.18)
	FormatY212LE     Format = C.GST_VIDEO_FORMAT_Y212_LE     // (94) – packed 4:2:2 YUV, 12 bits per channel (Y-U-Y-V) (Since: 1.18)
	FormatY412BE     Format = C.GST_VIDEO_FORMAT_Y412_BE     // (95) – packed 4:4:4:4 YUV, 12 bits per channel(U-Y-V-A...) (Since: 1.18)
	FormatY412LE     Format = C.GST_VIDEO_FORMAT_Y412_LE     // (96) – packed 4:4:4:4 YUV, 12 bits per channel(U-Y-V-A...) (Since: 1.18)
	FormatNV124L4    Format = C.GST_VIDEO_FORMAT_NV12_4L4    // (97) – NV12 with 4x4 tiles in linear order.
	FormatNV1232L32  Format = C.GST_VIDEO_FORMAT_NV12_32L32  // (98) – NV12 with 32x32 tiles in linear order.
)

Type castings

func AllFormats 

func AllFormats() []Format

AllFormats is a convenience function for retrieving all formats for inspection purposes. This is not really intended for use in an application, and more so for debugging.

func RawFormats 

func RawFormats() []Format

RawFormats returns a slice of all the raw video formats supported by GStreamer.

func (Format) FOURCC 

func (f Format) FOURCC() uint32

FOURCC converts this format value into the corresponding FOURCC. Only a few YUV formats have corresponding FOURCC values. If format has no corresponding FOURCC value, 0 is returned.

func (Format) Info 

func (f Format) Info() *FormatInfo

Info returns the FormatInfo for this video format.

func (Format) Palette 

func (f Format) Palette() color.Palette

Palette returns the color palette for this format, or nil if the format does not have one. At time of writing, RGB8P appears to be the only format with it's own palette.

func (Format) String 

func (f Format) String() string

String implements a stringer on a Format.

func (Format) ToGValue 

func (f Format) ToGValue() (*glib.Value, error)

ToGValue implements a glib.ValueTransformer

type FormatFlags 

type FormatFlags int

FormatFlags are different video flags that a format info can have. 

const (
	FormatFlagYUV     FormatFlags = C.GST_VIDEO_FORMAT_FLAG_YUV     // (1) – The video format is YUV, components are numbered 0=Y, 1=U, 2=V.
	FormatFlagRGB     FormatFlags = C.GST_VIDEO_FORMAT_FLAG_RGB     // (2) – The video format is RGB, components are numbered 0=R, 1=G, 2=B.
	FormatFlagGray    FormatFlags = C.GST_VIDEO_FORMAT_FLAG_GRAY    // (4) – The video is gray, there is one gray component with index 0.
	FormatFlagAlpha   FormatFlags = C.GST_VIDEO_FORMAT_FLAG_ALPHA   // (8) – The video format has an alpha components with the number 3.
	FormatFlagLE      FormatFlags = C.GST_VIDEO_FORMAT_FLAG_LE      // (16) – The video format has data stored in little endianness.
	FormatFlagPalette FormatFlags = C.GST_VIDEO_FORMAT_FLAG_PALETTE // (32) – The video format has a palette. The palette is stored in the second plane and indexes are stored in the first plane.
	FormatFlagComplex FormatFlags = C.GST_VIDEO_FORMAT_FLAG_COMPLEX // (64) – The video format has a complex layout that can't be described with the usual information in the GstVideoFormatInfo.
	FormatFlagUnpack  FormatFlags = C.GST_VIDEO_FORMAT_FLAG_UNPACK  // (128) – This format can be used in a GstVideoFormatUnpack and GstVideoFormatPack function.
	FormatFlagTiled   FormatFlags = C.GST_VIDEO_FORMAT_FLAG_TILED   // (256) – The format is tiled, there is tiling information in the last plane.
)

Type castings

type FormatInfo 

type FormatInfo struct {
	// contains filtered or unexported fields
}

FormatInfo contains information for a video format.

func (*FormatInfo) Bits 

func (f *FormatInfo) Bits() uint

Bits returns the number of bits used to pack data items. This can be less than 8 when multiple pixels are stored in a byte. for values > 8 multiple bytes should be read according to the endianness flag before applying the shift and mask.

func (*FormatInfo) ComponentDepth 

func (f *FormatInfo) ComponentDepth(component uint) uint

ComponentDepth returns the depth in bits for the given component.

func (*FormatInfo) ComponentHSub 

func (f *FormatInfo) ComponentHSub(component uint) uint

ComponentHSub returns the subsampling factor of the height for the component.

func (*FormatInfo) ComponentWSub 

func (f *FormatInfo) ComponentWSub(n uint) uint

ComponentWSub returns the subsampling factor of the width for the component.

func (*FormatInfo) Flags 

func (f *FormatInfo) Flags() FormatFlags

Flags returns the flags on this info.

func (*FormatInfo) Format 

func (f *FormatInfo) Format() Format

Format returns the format for this info.

func (*FormatInfo) HasAlpha 

func (f *FormatInfo) HasAlpha() bool

HasAlpha returns true if the alpha flag is set.

func (*FormatInfo) HasPalette 

func (f *FormatInfo) HasPalette() bool

HasPalette returns true if this info has a palette.

func (*FormatInfo) IsComplex 

func (f *FormatInfo) IsComplex() bool

IsComplex returns true if the complex flag is set.

func (*FormatInfo) IsGray 

func (f *FormatInfo) IsGray() bool

IsGray returns true if the gray flag is set.

func (*FormatInfo) IsLE 

func (f *FormatInfo) IsLE() bool

IsLE returns true if the LE flag is set.

func (*FormatInfo) IsRGB 

func (f *FormatInfo) IsRGB() bool

IsRGB returns true if the RGB flag is set.

func (*FormatInfo) IsTiled 

func (f *FormatInfo) IsTiled() bool

IsTiled returns true if the tiled flag is set.

func (*FormatInfo) IsYUV 

func (f *FormatInfo) IsYUV() bool

IsYUV returns true if the YUV flag is set.

func (*FormatInfo) Name 

func (f *FormatInfo) Name() string

Name returns a human readable name for this info.

func (*FormatInfo) NumComponents 

func (f *FormatInfo) NumComponents() uint

NumComponents returns the number of components in this info.

func (*FormatInfo) NumPlanes 

func (f *FormatInfo) NumPlanes() uint

NumPlanes returns the number of planes in this info.

func (*FormatInfo) Plane 

func (f *FormatInfo) Plane(n uint) uint

Plane returns the given plane index.

func (*FormatInfo) PlaneOffset 

func (f *FormatInfo) PlaneOffset(n uint) uint

PlaneOffset returns the offset for the given plane.

func (*FormatInfo) PlaneStride 

func (f *FormatInfo) PlaneStride(n uint) uint

PlaneStride returns the stride for the given plane.

func (*FormatInfo) TileHS 

func (f *FormatInfo) TileHS() uint

TileHS returns the height of a tile, in bytes, represented as a shift.

func (*FormatInfo) TileMode 

func (f *FormatInfo) TileMode() TileMode

TileMode returns the tiling mode.

func (*FormatInfo) TileWS 

func (f *FormatInfo) TileWS() uint

TileWS returns the width of a tile, in bytes, represented as a shift.

type Info 

type Info struct {
	// contains filtered or unexported fields
}

Info describes image properties. This information can be filled in from GstCaps with InfoFromCaps. The information is also used to store the specific video info when mapping a video frame with FrameMap.

func NewInfo 

func NewInfo() *Info

NewInfo returns a new Info instance. You can populate it by chaining builders to this constructor.

func (*Info) ChromaSite 

func (i *Info) ChromaSite() ChromaSite

ChromaSite returns the ChromaSite for this info.

func (*Info) Colorimetry 

func (i *Info) Colorimetry() *Colorimetry

Colorimetry returns the colorimetry for this info.

func (*Info) Convert 

func (i *Info) Convert(srcFormat, destFormat gst.Format, srcValue int64) (out int64, ok bool)

Convert converts among various gst.Format types. This function handles gst.FormatBytes, gst.FormatTime, and gst.FormatDefault. For raw video, gst.FormatDefault corresponds to video frames. This function can be used to handle pad queries of the type gst.QueryTypeConvert.

func (*Info) FPS 

func (i *Info) FPS() *gst.FractionValue

FPS returns the frames-per-second value for the info.

func (*Info) FieldHeight 

func (i *Info) FieldHeight() int

FieldHeight returns the field height for this info.

func (*Info) FieldOrder 

func (i *Info) FieldOrder() FieldOrder

FieldOrder returns the field order for this info.

func (*Info) FieldRateN 

func (i *Info) FieldRateN() int

FieldRateN returns the rate numerator depending on the interlace mode.

func (*Info) FlagIsSet 

func (i *Info) FlagIsSet(f Flags) bool

FlagIsSet returns true if the given flag(s) are set on the info.

func (*Info) FlagSet 

func (i *Info) FlagSet(f Flags) *Info

FlagSet sets the given flag(s) on the info. The underlying info is returned for chaining builders.

func (*Info) FlagUnset 

func (i *Info) FlagUnset(f Flags) *Info

FlagUnset unsets the given flag(s) on the info. The underlying info is returned for chaining builders.

func (*Info) Flags 

func (i *Info) Flags() Flags

Flags returns the flags on this info.

func (*Info) Format 

func (i *Info) Format() Format

Format returns the format for the info. You can call Info() on the return value to inspect the properties further.

func (*Info) Free 

func (i *Info) Free()

Free will free this video info

func (*Info) FromCaps 

func (i *Info) FromCaps(caps *gst.Caps) *Info

FromCaps parses the caps and updates this info.

func (*Info) HasAlpha 

func (i *Info) HasAlpha() bool

HasAlpha returns true if the alpha flag is set on the format info.

func (*Info) Height 

func (i *Info) Height() int

Height returns the height of the video.

func (*Info) InterlaceMode 

func (i *Info) InterlaceMode() InterlaceMode

InterlaceMode returns the interlace mode of this Info.

func (*Info) IsEqual 

func (i *Info) IsEqual(info *Info) bool

IsEqual compares two GstVideoInfo and returns whether they are equal or not.

func (*Info) IsGray 

func (i *Info) IsGray() bool

IsGray returns if the format is grayscale.

func (*Info) IsInterlaced 

func (i *Info) IsInterlaced() bool

IsInterlaced returns true if the interlace mode is not Progressive.

func (*Info) IsRGB 

func (i *Info) IsRGB() bool

IsRGB returns if the format is RGB.

func (*Info) IsYUV 

func (i *Info) IsYUV() bool

IsYUV returns if the format is YUV.

func (*Info) MultiviewFlags 

func (i *Info) MultiviewFlags() MultiviewFlags

MultiviewFlags returns the MultiviewFlags on the info.

func (*Info) MultiviewMode 

func (i *Info) MultiviewMode() MultiviewMode

MultiviewMode returns the MultiviewMode on thee info.

func (*Info) Name 

func (i *Info) Name() string

Name returns a human readable name forr the info.

func (*Info) NumComponents 

func (i *Info) NumComponents() uint

NumComponents returns the number of components in the info.

func (*Info) NumPlanes 

func (i *Info) NumPlanes() uint

NumPlanes returns the number of planes in the info.

func (*Info) PAR 

func (i *Info) PAR() *gst.FractionValue

PAR returns the pixel-aspect-ration value for the info.

func (*Info) Size 

func (i *Info) Size() int64

Size returns the size of the info.

func (*Info) ToCaps 

func (i *Info) ToCaps() *gst.Caps

ToCaps returns the caps representation of this video info.

func (*Info) Views 

func (i *Info) Views() int

Views returns the number of views.

func (*Info) Width 

func (i *Info) Width() int

Width returns the width of the video.

func (*Info) WithAlign 

func (i *Info) WithAlign(align *Alignment) *Info

WithAlign adjusts the offset and stride fields in info so that the padding and stride alignment in align is respected.

Extra padding will be added to the right side when stride alignment padding is required and align will be updated with the new padding values.

func (*Info) WithFPS 

func (i *Info) WithFPS(f *gst.FractionValue) *Info

WithFPS sets the FPS on this info.

func (*Info) WithFormat 

func (i *Info) WithFormat(format Format, width, height uint) *Info

WithFormat sets the format on this info.

Note: This initializes info first, no values are preserved. This function does not set the offsets correctly for interlaced vertically subsampled formats. If the format is invalid (e.g. because the size of a frame can't be represented as a 32 bit integer), nothing will happen. This is is for convenience in chaining, but may be changed in the future.

func (*Info) WithInterlacedFormat 

func (i *Info) WithInterlacedFormat(format Format, interlaceMode InterlaceMode, width, height uint) *Info

WithInterlacedFormat is the same as WithFormat but also allows to set the interlaced mode.

func (*Info) WithPAR 

func (i *Info) WithPAR(f *gst.FractionValue) *Info

WithPAR sets the FPS on this info.

type InterlaceMode 

type InterlaceMode int

InterlaceMode is the possible values describing the interlace mode of the stream. 

const (
	InterlaceModeProgressive InterlaceMode = C.GST_VIDEO_INTERLACE_MODE_PROGRESSIVE // (0) – all frames are progressive
	InterlaceModeInterleaved InterlaceMode = C.GST_VIDEO_INTERLACE_MODE_INTERLEAVED // (1) – 2 fields are interleaved in one video frame. Extra buffer flags describe the field order.
	InterlaceModeMixed       InterlaceMode = C.GST_VIDEO_INTERLACE_MODE_MIXED       // (2) – frames contains both interlaced and progressive video, the buffer flags describe the frame and fields.
	InterlaceModeFields      InterlaceMode = C.GST_VIDEO_INTERLACE_MODE_FIELDS      // (3) – 2 fields are stored in one buffer, use the frame ID to get access to the required field. For multiview (the 'views' property > 1) the fields of view N can be found at frame ID (N * 2) and (N * 2) + 1. Each field has only half the amount of lines as noted in the height property. This mode requires multiple GstVideoMeta metadata to describe the fields.
	InterlaceModeAlternate   InterlaceMode = C.GST_VIDEO_INTERLACE_MODE_ALTERNATE   // (4) – 1 field is stored in one buffer, GST_VIDEO_BUFFER_FLAG_TF or GST_VIDEO_BUFFER_FLAG_BF indicates if the buffer is carrying the top or bottom field, respectively. The top and bottom buffers are expected to alternate in the pipeline, with this mode (Since: 1.16).
)

Type castings

func (InterlaceMode) String 

func (i InterlaceMode) String() string

String implements a stringer on interlace mode

type KeyEvent 

type KeyEvent string

KeyEvent represents types of key events. 

const (
	KeyPress   KeyEvent = "key-press"
	KeyRelease KeyEvent = "key-release"
)

Enums

type MouseEvent 

type MouseEvent string

MouseEvent represents types of mouse events. 

const (
	MouseButtonPress   MouseEvent = "mouse-button-press"
	MouseButtonRelease MouseEvent = "mouse-button-release"
	MouseMove          MouseEvent = "mouse-move"
)

Enums

type MultiviewFlags 

type MultiviewFlags int

MultiviewFlags are used to indicate extra properties of a stereo/multiview stream beyond the frame layout and buffer mapping that is conveyed in the MultiviewMode. 

const (
	MultiviewFlagsNone           MultiviewFlags = C.GST_VIDEO_MULTIVIEW_FLAGS_NONE             // (0) – No flags
	MultiviewFlagsRightViewFirst MultiviewFlags = C.GST_VIDEO_MULTIVIEW_FLAGS_RIGHT_VIEW_FIRST // (1) – For stereo streams, the normal arrangement of left and right views is reversed.
	MultiviewFlagsLeftFlipped    MultiviewFlags = C.GST_VIDEO_MULTIVIEW_FLAGS_LEFT_FLIPPED     // (2) – The left view is vertically mirrored.
	MultiviewFlagsLeftFlopped    MultiviewFlags = C.GST_VIDEO_MULTIVIEW_FLAGS_LEFT_FLOPPED     // (4) – The left view is horizontally mirrored.
	MultiviewFlagsRightFlipped   MultiviewFlags = C.GST_VIDEO_MULTIVIEW_FLAGS_RIGHT_FLIPPED    // (8) – The right view is vertically mirrored.
	MultiviewFlagsRightFlopped   MultiviewFlags = C.GST_VIDEO_MULTIVIEW_FLAGS_RIGHT_FLOPPED    // (16) – The right view is horizontally mirrored.
	MultiviewFlagsHalfAspect     MultiviewFlags = C.GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT      // (16384) – For frame-packed multiview modes, indicates that the individual views have been encoded with half the true width or height and should be scaled back up for display. This flag is used for overriding input layout interpretation by adjusting pixel-aspect-ratio. For side-by-side, column interleaved or checkerboard packings, the pixel width will be doubled. For row interleaved and top-bottom encodings, pixel height will be doubled.
	MultiviewFlagsMixedMono      MultiviewFlags = C.GST_VIDEO_MULTIVIEW_FLAGS_MIXED_MONO       // (32768) – The video stream contains both mono and multiview portions, signaled on each buffer by the absence or presence of the GST_VIDEO_BUFFER_FLAG_MULTIPLE_VIEW buffer flag.
)

Type castings

type MultiviewFramePacking 

type MultiviewFramePacking int

MultiviewFramePacking represents the subset of MultiviewMode values that can be applied to any video frame without needing extra metadata. It can be used by elements that provide a property to override the multiview interpretation of a video stream when the video doesn't contain any markers.

This enum is used (for example) on playbin, to re-interpret a played video stream as a stereoscopic video. The individual enum values are equivalent to and have the same value as the matching MultiviewMode. 

const (
	MultiviewFramePackingNone               MultiviewFramePacking = C.GST_VIDEO_MULTIVIEW_FRAME_PACKING_NONE                  // (-1) – A special value indicating no frame packing info.
	MultiviewFramePackingMono               MultiviewFramePacking = C.GST_VIDEO_MULTIVIEW_FRAME_PACKING_MONO                  // (0) – All frames are monoscopic.
	MultiviewFramePackingLeft               MultiviewFramePacking = C.GST_VIDEO_MULTIVIEW_FRAME_PACKING_LEFT                  // (1) – All frames represent a left-eye view.
	MultiviewFramePackingRight              MultiviewFramePacking = C.GST_VIDEO_MULTIVIEW_FRAME_PACKING_RIGHT                 // (2) – All frames represent a right-eye view.
	MultiviewFramePackingSideBySide         MultiviewFramePacking = C.GST_VIDEO_MULTIVIEW_FRAME_PACKING_SIDE_BY_SIDE          // (3) – Left and right eye views are provided in the left and right half of the frame respectively.
	MultiviewFramePackingSideBySideQuincunx MultiviewFramePacking = C.GST_VIDEO_MULTIVIEW_FRAME_PACKING_SIDE_BY_SIDE_QUINCUNX // (4) – Left and right eye views are provided in the left and right half of the frame, but have been sampled using quincunx method, with half-pixel offset between the 2 views.
	MultiviewFramePackingColumnInterleaved  MultiviewFramePacking = C.GST_VIDEO_MULTIVIEW_FRAME_PACKING_COLUMN_INTERLEAVED    // (5) – Alternating vertical columns of pixels represent the left and right eye view respectively.
	MultiviewFramePackingRowInterleaved     MultiviewFramePacking = C.GST_VIDEO_MULTIVIEW_FRAME_PACKING_ROW_INTERLEAVED       // (6) – Alternating horizontal rows of pixels represent the left and right eye view respectively.
	MultiviewFramePackingTopBottom          MultiviewFramePacking = C.GST_VIDEO_MULTIVIEW_FRAME_PACKING_TOP_BOTTOM            // (7) – The top half of the frame contains the left eye, and the bottom half the right eye.
	MultiviewFramePackingCheckerboard       MultiviewFramePacking = C.GST_VIDEO_MULTIVIEW_FRAME_PACKING_CHECKERBOARD          // (8) – Pixels are arranged with alternating pixels representing left and right eye views in a checkerboard fashion.
)

Type castings

type MultiviewMode 

type MultiviewMode int

MultiviewMode represents all possible stereoscopic 3D and multiview representations. In conjunction with MultiviewFlags, describes how multiview content is being transported in the stream. 

const (
	MultiviewModeNone                  MultiviewMode = C.GST_VIDEO_MULTIVIEW_MODE_NONE                     // (-1) – A special value indicating no multiview information. Used in GstVideoInfo and other places to indicate that no specific multiview handling has been requested or provided. This value is never carried on caps.
	MultiviewModeMono                  MultiviewMode = C.GST_VIDEO_MULTIVIEW_MODE_MONO                     // (0) – All frames are monoscopic.
	MultiviewModeLeft                  MultiviewMode = C.GST_VIDEO_MULTIVIEW_MODE_LEFT                     // (1) – All frames represent a left-eye view.
	MultiviewModeRight                 MultiviewMode = C.GST_VIDEO_MULTIVIEW_MODE_RIGHT                    // (2) – All frames represent a right-eye view.
	MultiviewModeSideBySide            MultiviewMode = C.GST_VIDEO_MULTIVIEW_MODE_SIDE_BY_SIDE             // (3) – Left and right eye views are provided in the left and right half of the frame respectively.
	MultiviewModeSideBySideQuincunx    MultiviewMode = C.GST_VIDEO_MULTIVIEW_MODE_SIDE_BY_SIDE_QUINCUNX    // (4) – Left and right eye views are provided in the left and right half of the frame, but have been sampled using quincunx method, with half-pixel offset between the 2 views.
	MultiviewModeColumnInterleaved     MultiviewMode = C.GST_VIDEO_MULTIVIEW_MODE_COLUMN_INTERLEAVED       // (5) – Alternating vertical columns of pixels represent the left and right eye view respectively.
	MultiviewModeRowInterleaved        MultiviewMode = C.GST_VIDEO_MULTIVIEW_MODE_ROW_INTERLEAVED          // (6) – Alternating horizontal rows of pixels represent the left and right eye view respectively.
	MultiviewModeTopBottom             MultiviewMode = C.GST_VIDEO_MULTIVIEW_MODE_TOP_BOTTOM               // (7) – The top half of the frame contains the left eye, and the bottom half the right eye.
	MultiviewModeCheckerboard          MultiviewMode = C.GST_VIDEO_MULTIVIEW_MODE_CHECKERBOARD             // (8) – Pixels are arranged with alternating pixels representing left and right eye views in a checkerboard fashion.
	MultiviewModeFrameByFrame          MultiviewMode = C.GST_VIDEO_MULTIVIEW_MODE_FRAME_BY_FRAME           // (32) – Left and right eye views are provided in separate frames alternately.
	MultiviewModeMultiviewFrameByFrame MultiviewMode = C.GST_VIDEO_MULTIVIEW_MODE_MULTIVIEW_FRAME_BY_FRAME // (33) – Multiple independent views are provided in separate frames in sequence. This method only applies to raw video buffers at the moment. Specific view identification is via the GstVideoMultiviewMeta and GstVideoMeta(s) on raw video buffers.
	MultiviewModeSeparated             MultiviewMode = C.GST_VIDEO_MULTIVIEW_MODE_SEPARATED                // (34) – Multiple views are provided as separate GstMemory framebuffers attached to each GstBuffer, described by the GstVideoMultiviewMeta and GstVideoMeta(s)
)

Type castings 

type Navigation interface {
	// Sends the indicated command to the navigation interface.
	SendCommand(NavigationCommand)
	// Sends an event with the given structure.
	SendEvent(*gst.Structure)
	// Sends the given key event. Recognized values for the event are "key-press"
	// and "key-release". The key is the character representation of the key. This is typically
	// as produced by XKeysymToString.
	SendKeyEvent(event KeyEvent, key string)
	// Sends a mouse event to the navigation interface. Mouse event coordinates are sent relative
	// to the display space of the related output area. This is usually the size in pixels of the
	// window associated with the element implementing the Navigation interface. Use 0 for the
	// button when doing mouse move events.
	SendMouseEvent(event MouseEvent, button int, x, y float64)
	// Sends a mouse scroll event to the navigation interface. Mouse event coordinates are sent
	// relative to the display space of the related output area. This is usually the size in pixels
	// of the window associated with the element implementing the Navigation interface.
	SendMouseScrollEvent(x, y, dX, dY float64)
}

Navigation interface is used for creating and injecting navigation related events such as mouse button presses, cursor motion and key presses. The associated library also provides methods for parsing received events, and for sending and receiving navigation related bus events. One main use-case is DVD menu navigation. 

  The main parts of the API are:

	- The Navigation interface, implemented by elements which provide an application with
      the ability to create and inject navigation events into the pipeline.

	- Navigation event handling API. Navigation events are created in response to calls
	  on a Navigation interface implementation, and sent in the pipeline. Upstream elements
      can use the navigation event API functions to parse the contents of received messages.

	- Navigation message handling API. Navigation messages may be sent on the message bus
	  to inform applications of navigation related changes in the pipeline, such as the mouse
      moving over a clickable region, or the set of available angles changing.

The Navigation message functions provide functions for creating and parsing custom bus messages for signaling GstNavigation changes. 

func NavigationFromElement(element *gst.Element) Navigation

NavigationFromElement checks if the given element implements the Navigation interface. If it does, a useable interface is returned. Otherwise, it returns nil. 

type NavigationCommand int

NavigationCommand is a set of commands that may be issued to an element providing the Navigation interface. The available commands can be queried via the QueryNewCommands query. 

const (
	NavigationCommandInvalid   NavigationCommand = C.GST_NAVIGATION_COMMAND_INVALID    // (0) – An invalid command entry
	NavigationCommandMenu1     NavigationCommand = C.GST_NAVIGATION_COMMAND_MENU1      // (1) – Execute navigation menu command 1. For DVD, this enters the DVD root menu, or exits back to the title from the menu.
	NavigationCommandMenu2     NavigationCommand = C.GST_NAVIGATION_COMMAND_MENU2      // (2) – Execute navigation menu command 2. For DVD, this jumps to the DVD title menu.
	NavigationCommandMenu3     NavigationCommand = C.GST_NAVIGATION_COMMAND_MENU3      // (3) – Execute navigation menu command 3. For DVD, this jumps into the DVD root menu.
	NavigationCommandMenu4     NavigationCommand = C.GST_NAVIGATION_COMMAND_MENU4      // (4) – Execute navigation menu command 4. For DVD, this jumps to the Subpicture menu.
	NavigationCommandMenu5     NavigationCommand = C.GST_NAVIGATION_COMMAND_MENU5      // (5) – Execute navigation menu command 5. For DVD, this jumps to the audio menu.
	NavigationCommandMenu6     NavigationCommand = C.GST_NAVIGATION_COMMAND_MENU6      // (6) – Execute navigation menu command 6. For DVD, this jumps to the angles menu.
	NavigationCommandMenu7     NavigationCommand = C.GST_NAVIGATION_COMMAND_MENU7      // (7) – Execute navigation menu command 7. For DVD, this jumps to the chapter menu.
	NavigationCommandLeft      NavigationCommand = C.GST_NAVIGATION_COMMAND_LEFT       // (20) – Select the next button to the left in a menu, if such a button exists.
	NavigationCommandRight     NavigationCommand = C.GST_NAVIGATION_COMMAND_RIGHT      // (21) – Select the next button to the right in a menu, if such a button exists.
	NavigationCommandUp        NavigationCommand = C.GST_NAVIGATION_COMMAND_UP         // (22) – Select the button above the current one in a menu, if such a button exists.
	NavigationCommandDown      NavigationCommand = C.GST_NAVIGATION_COMMAND_DOWN       // (23) – Select the button below the current one in a menu, if such a button exists.
	NavigationCommandActivate  NavigationCommand = C.GST_NAVIGATION_COMMAND_ACTIVATE   // (24) – Activate (click) the currently selected button in a menu, if such a button exists.
	NavigationCommandPrevAngle NavigationCommand = C.GST_NAVIGATION_COMMAND_PREV_ANGLE // (30) – Switch to the previous angle in a multiangle feature.
	NavigationCommandNextAngle NavigationCommand = C.GST_NAVIGATION_COMMAND_NEXT_ANGLE // (31) – Switch to the next angle in a multiangle feature.
)

Type castings 

const (
	NavigationCommandDVDMenu           NavigationCommand = C.GST_NAVIGATION_COMMAND_DVD_MENU
	NavigationCommandDVDTitleMenu      NavigationCommand = C.GST_NAVIGATION_COMMAND_DVD_TITLE_MENU
	NavigationCommandDVDRootMenu       NavigationCommand = C.GST_NAVIGATION_COMMAND_DVD_ROOT_MENU
	NavigationCommandDVDSubpictureMenu NavigationCommand = C.GST_NAVIGATION_COMMAND_DVD_SUBPICTURE_MENU
	NavigationCommandDVDAudioMenu      NavigationCommand = C.GST_NAVIGATION_COMMAND_DVD_AUDIO_MENU
	NavigationCommandDVDAngleMenu      NavigationCommand = C.GST_NAVIGATION_COMMAND_DVD_ANGLE_MENU
	NavigationCommandDVDChapterMenu    NavigationCommand = C.GST_NAVIGATION_COMMAND_DVD_CHAPTER_MENU
)

Extra aliases for convenience in handling DVD navigation, 

type NavigationEvent struct{ *gst.Event }

NavigationEvent extends the Event from the core library and is used by elements implementing the Navigation interface. You can wrap an event in this struct yourself, but it is safer to use the ToNavigationEvent method first to check validity.

func ToNavigationEvent 

func ToNavigationEvent(event *gst.Event) *NavigationEvent

ToNavigationEvent checks if the given event is a NavigationEvent, and if so, returrns a NavigationEvent instance wrapping the event. If the event is not a NavigationEvent this function returns nil. 

func (e *NavigationEvent) GetType() NavigationEventType

GetType returns the type of this event. 

type NavigationEventType int

NavigationEventType are enum values for the various events that an element implementing the Navigation interface might send up the pipeline. 

const (
	NavigationEventInvalid            NavigationEventType = C.GST_NAVIGATION_EVENT_INVALID              // (0) – Returned from gst_navigation_event_get_type when the passed event is not a navigation event.
	NavigationEventKeyPress           NavigationEventType = C.GST_NAVIGATION_EVENT_KEY_PRESS            // (1) – A key press event. Use gst_navigation_event_parse_key_event to extract the details from the event.
	NavigationEventKeyRelease         NavigationEventType = C.GST_NAVIGATION_EVENT_KEY_RELEASE          // (2) – A key release event. Use gst_navigation_event_parse_key_event to extract the details from the event.
	NavigationEventMouseButtonPress   NavigationEventType = C.GST_NAVIGATION_EVENT_MOUSE_BUTTON_PRESS   // (3) – A mouse button press event. Use gst_navigation_event_parse_mouse_button_event to extract the details from the event.
	NavigationEventMouseButtonRelease NavigationEventType = C.GST_NAVIGATION_EVENT_MOUSE_BUTTON_RELEASE // (4) – A mouse button release event. Use gst_navigation_event_parse_mouse_button_event to extract the details from the event.
	NavigationEventMouseMove          NavigationEventType = C.GST_NAVIGATION_EVENT_MOUSE_MOVE           // (5) – A mouse movement event. Use gst_navigation_event_parse_mouse_move_event to extract the details from the event.
	NavigationEventCommand            NavigationEventType = C.GST_NAVIGATION_EVENT_COMMAND              // (6) – A navigation command event. Use gst_navigation_event_parse_command to extract the details from the event.
	NavigationEventMouseScroll        NavigationEventType = C.GST_NAVIGATION_EVENT_MOUSE_SCROLL         // (7) – A mouse scroll event. Use gst_navigation_event_parse_mouse_scroll_event to extract the details from the event. (Since: 1.18)
)

Type castings 

type NavigationMessage struct{ *gst.Message }

NavigationMessage extends the Event from the core library and is used by elements implementing the Navigation interface. You can wrap a message in this struct yourself, but it is safer to use the ToNavigationMessage method first to check validity.

func ToNavigationMessage 

func ToNavigationMessage(msg *gst.Message) *NavigationMessage

ToNavigationMessage checks if the given message is a NavigationMessage, and if so, returns a NavigatonMessage instance wrapping the message. If the message is not a NavigationMessage, this function returns nil. 

func (m *NavigationMessage) GetType() NavigationMessageType

GetType returns the type of this message. 

type NavigationMessageType int

NavigationMessageType is a set of notifications that may be received on the bus when navigation related status changes. 

const (
	NavigationMessageInvalid         NavigationMessageType = C.GST_NAVIGATION_MESSAGE_INVALID          // (0) – Returned from gst_navigation_message_get_type when the passed message is not a navigation message.
	NavigationMessageMouseOver       NavigationMessageType = C.GST_NAVIGATION_MESSAGE_MOUSE_OVER       // (1) – Sent when the mouse moves over or leaves a clickable region of the output, such as a DVD menu button.
	NavigationMessageCommandsChanged NavigationMessageType = C.GST_NAVIGATION_MESSAGE_COMMANDS_CHANGED // (2) – Sent when the set of available commands changes and should re-queried by interested applications.
	NavigationMessageAnglesChanged   NavigationMessageType = C.GST_NAVIGATION_MESSAGE_ANGLES_CHANGED   // (3) – Sent when display angles in a multi-angle feature (such as a multiangle DVD) change - either angles have appeared or disappeared.
	NavigationMessageEvent           NavigationMessageType = C.GST_NAVIGATION_MESSAGE_EVENT            // (4) – Sent when a navigation event was not handled by any element in the pipeline
)

Type castings 

type NavigationQuery struct{ *gst.Query }

NavigationQuery extends the Query from the core library and is used by elements implementing the Navigation interface. You can wrap a query in this struct yourself, but it is safer to use the ToNavigationQuery method first to check validity.

func ToNavigationQuery 

func ToNavigationQuery(query *gst.Query) *NavigationQuery

ToNavigationQuery checks if the given query is a NavigationQuery, and if so, returns a NavigationQuery instance wrapping the query. If the query is not a NavigationQuery, this function returns nil. 

func (q *NavigationQuery) GetType() NavigationQueryType

GetType returns the type of this query. 

type NavigationQueryType int

NavigationQueryType represents types of navigation interface queries. 

const (
	NavigationQueryInvalid  NavigationQueryType = C.GST_NAVIGATION_QUERY_INVALID  // (0) – invalid query
	NavigationQueryCommands NavigationQueryType = C.GST_NAVIGATION_QUERY_COMMANDS // (1) – command query
	NavigationQueryAngles   NavigationQueryType = C.GST_NAVIGATION_QUERY_ANGLES   // (2) – viewing angle query
)

Type castings

type OrientationMethod 

type OrientationMethod int

OrientationMethod represents the different video orientation methods. 

const (
	OrientationMethodIdentity OrientationMethod = C.GST_VIDEO_ORIENTATION_IDENTITY // (0) – Identity (no rotation)
	OrientationMethod90R      OrientationMethod = C.GST_VIDEO_ORIENTATION_90R      // (1) – Rotate clockwise 90 degrees
	OrientationMethod180      OrientationMethod = C.GST_VIDEO_ORIENTATION_180      // (2) – Rotate 180 degrees
	OrientationMethod90L      OrientationMethod = C.GST_VIDEO_ORIENTATION_90L      // (3) – Rotate counter-clockwise 90 degrees
	OrientationMethodHoriz    OrientationMethod = C.GST_VIDEO_ORIENTATION_HORIZ    // (4) – Flip horizontally
	OrientationMethodVert     OrientationMethod = C.GST_VIDEO_ORIENTATION_VERT     // (5) – Flip vertically
	OrientationMethodULLR     OrientationMethod = C.GST_VIDEO_ORIENTATION_UL_LR    // (6) – Flip across upper left/lower right diagonal
	OrientationMethodURLL     OrientationMethod = C.GST_VIDEO_ORIENTATION_UR_LL    // (7) – Flip across upper right/lower left diagonal
	OrientationMethodAuto     OrientationMethod = C.GST_VIDEO_ORIENTATION_AUTO     // (8) – Select flip method based on image-orientation tag
	OrientationMethodCustom   OrientationMethod = C.GST_VIDEO_ORIENTATION_CUSTOM   // (9) – Current status depends on plugin internal setup
)

Type castings

type PackFlags 

type PackFlags int

PackFlags are different flags that can be used when packing and unpacking. 

const (
	PackFlagNone          PackFlags = C.GST_VIDEO_PACK_FLAG_NONE           // (0) – No flag
	PackFlagTruncateRange PackFlags = C.GST_VIDEO_PACK_FLAG_TRUNCATE_RANGE // (1) – When the source has a smaller depth than the target format, set the least significant bits of the target to 0. This is likely slightly faster but less accurate. When this flag is not specified, the most significant bits of the source are duplicated in the least significant bits of the destination.
	PackFlagInterlaced    PackFlags = C.GST_VIDEO_PACK_FLAG_INTERLACED     // (2) – The source is interlaced. The unpacked format will be interlaced as well with each line containing information from alternating fields. (Since: 1.2)
)

Type castings

type TileMode 

type TileMode int

TileMode is an enum value describing the available tiling modes. 

const (
	TileModeUnknown   TileMode = C.GST_VIDEO_TILE_MODE_UNKNOWN    // (0) – Unknown or unset tile mode
	TileModeZFlipZ2X2 TileMode = C.GST_VIDEO_TILE_MODE_ZFLIPZ_2X2 // (65536) – Every four adjacent blocks - two horizontally and two vertically are grouped together and are located in memory in Z or flipped Z order. In case of odd rows, the last row of blocks is arranged in linear order.
	TileModeLinear    TileMode = C.GST_VIDEO_TILE_MODE_LINEAR     // (131072) – Tiles are in row order.
)

Type castings

type TileType 

type TileType int

TileType is an enum value describing the most common tiling types. 

const (
	TileTypeIndexed TileType = C.GST_VIDEO_TILE_TYPE_INDEXED // (0) – Tiles are indexed. Use gst_video_tile_get_index () to retrieve the tile at the requested coordinates.
)

Type castings

type TransferFunction 

type TransferFunction int

TransferFunction defines the formula for converting between non-linear RGB (R'G'B') and linear RGB 

const (
	TransferUnknown    TransferFunction = C.GST_VIDEO_TRANSFER_UNKNOWN      // (0) – unknown transfer function
	TransferGamma10    TransferFunction = C.GST_VIDEO_TRANSFER_GAMMA10      // (1) – linear RGB, gamma 1.0 curve
	TransferGamma18    TransferFunction = C.GST_VIDEO_TRANSFER_GAMMA18      // (2) – Gamma 1.8 curve
	TransferGamma20    TransferFunction = C.GST_VIDEO_TRANSFER_GAMMA20      // (3) – Gamma 2.0 curve
	TransferGamma22    TransferFunction = C.GST_VIDEO_TRANSFER_GAMMA22      // (4) – Gamma 2.2 curve
	TransferBT709      TransferFunction = C.GST_VIDEO_TRANSFER_BT709        // (5) – Gamma 2.2 curve with a linear segment in the lower range, also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM / ITU-R BT1361
	TransferSMPTE240M  TransferFunction = C.GST_VIDEO_TRANSFER_SMPTE240M    // (6) – Gamma 2.2 curve with a linear segment in the lower range
	TransferSRGB       TransferFunction = C.GST_VIDEO_TRANSFER_SRGB         // (7) – Gamma 2.4 curve with a linear segment in the lower range. IEC 61966-2-1 (sRGB or sYCC)
	TransferGamma28    TransferFunction = C.GST_VIDEO_TRANSFER_GAMMA28      // (8) – Gamma 2.8 curve, also ITU-R BT470BG
	TransferLog100     TransferFunction = C.GST_VIDEO_TRANSFER_LOG100       // (9) – Logarithmic transfer characteristic 100:1 range
	TransferLog316     TransferFunction = C.GST_VIDEO_TRANSFER_LOG316       // (10) – Logarithmic transfer characteristic 316.22777:1 range (100 * sqrt(10) : 1)
	TransferBT202012   TransferFunction = C.GST_VIDEO_TRANSFER_BT2020_12    // (11) – Gamma 2.2 curve with a linear segment in the lower range. Used for BT.2020 with 12 bits per component. Since: 1.6
	TransferAdobeRGB   TransferFunction = C.GST_VIDEO_TRANSFER_ADOBERGB     // (12) – Gamma 2.19921875. Since: 1.8
	TransferBT202010   TransferFunction = C.GST_VIDEO_TRANSFER_BT2020_10    // (13) – Rec. ITU-R BT.2020-2 with 10 bits per component. (functionally the same as the values GST_VIDEO_TRANSFER_BT709 and GST_VIDEO_TRANSFER_BT601). Since: 1.18
	TransferSMPTE2084  TransferFunction = C.GST_VIDEO_TRANSFER_SMPTE2084    // (14) – SMPTE ST 2084 for 10, 12, 14, and 16-bit systems. Known as perceptual quantization (PQ) Since: 1.18
	TransferARIBSTDB67 TransferFunction = C.GST_VIDEO_TRANSFER_ARIB_STD_B67 // (15) – Association of Radio Industries and Businesses (ARIB) STD-B67 and Rec. ITU-R BT.2100-1 hybrid loggamma (HLG) system Since: 1.18
	TransferBT601      TransferFunction = C.GST_VIDEO_TRANSFER_BT601        // (16) – also known as SMPTE170M / ITU-R BT1358 525 or 625 / ITU-R BT1700 NTSC
)

Type castings

Source Files

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