GI.GstVideo.Structs.VideoCodecAlphaMeta

This meta is primarily for internal use in GStreamer elements to support VP8/VP9 transparent video stored into WebM or Matroska containers, or transparent static AV1 images. Nothing prevents you from using this meta for custom purposes, but it generally can't be used to easily to add support for alpha channels to CODECs or formats that don't support that out of the box.

Since: 1.20

Exported types

newtype VideoCodecAlphaMeta

Memory-managed wrapper type.

Constructors

VideoCodecAlphaMeta (ManagedPtr VideoCodecAlphaMeta)

Instances

Eq VideoCodecAlphaMeta

Defined in GI.GstVideo.Structs.VideoCodecAlphaMeta

Methods

(==) :: VideoCodecAlphaMeta -> VideoCodecAlphaMeta -> Bool

(/=) :: VideoCodecAlphaMeta -> VideoCodecAlphaMeta -> Bool

BoxedPtr VideoCodecAlphaMeta

Defined in GI.GstVideo.Structs.VideoCodecAlphaMeta

Methods

boxedPtrCopy :: VideoCodecAlphaMeta -> IO VideoCodecAlphaMeta

boxedPtrFree :: VideoCodecAlphaMeta -> IO ()

CallocPtr VideoCodecAlphaMeta

Defined in GI.GstVideo.Structs.VideoCodecAlphaMeta

Methods

boxedPtrCalloc :: IO (Ptr VideoCodecAlphaMeta)

ManagedPtrNewtype VideoCodecAlphaMeta

Defined in GI.GstVideo.Structs.VideoCodecAlphaMeta

Methods

toManagedPtr :: VideoCodecAlphaMeta -> ManagedPtr VideoCodecAlphaMeta

tag ~ 'AttrSet => Constructible VideoCodecAlphaMeta tag

Defined in GI.GstVideo.Structs.VideoCodecAlphaMeta

Methods

new :: MonadIO m => (ManagedPtr VideoCodecAlphaMeta -> VideoCodecAlphaMeta) -> [AttrOp VideoCodecAlphaMeta tag] -> m VideoCodecAlphaMeta

newZeroVideoCodecAlphaMeta :: MonadIO m => m VideoCodecAlphaMeta

Construct a VideoCodecAlphaMeta struct initialized to zero.

Methods

getInfo

videoCodecAlphaMetaGetInfo

Arguments

:: (HasCallStack, MonadIO m)

=> m MetaInfo

Returns: MetaInfo pointer that describes VideoCodecAlphaMeta.

No description available in the introspection data.

Since: 1.20

Properties

buffer

the encoded alpha frame

clearVideoCodecAlphaMetaBuffer :: MonadIO m => VideoCodecAlphaMeta -> m ()

Set the value of the “buffer” field to Nothing. When overloading is enabled, this is equivalent to

clear #buffer

getVideoCodecAlphaMetaBuffer :: MonadIO m => VideoCodecAlphaMeta -> m (Maybe Buffer)

Get the value of the “buffer” field. When overloading is enabled, this is equivalent to

get videoCodecAlphaMeta #buffer

setVideoCodecAlphaMetaBuffer :: MonadIO m => VideoCodecAlphaMeta -> Ptr Buffer -> m ()

Set the value of the “buffer” field. When overloading is enabled, this is equivalent to

set videoCodecAlphaMeta [ #buffer := value ]

meta

parent Meta

getVideoCodecAlphaMetaMeta :: MonadIO m => VideoCodecAlphaMeta -> m Meta

Get the value of the “meta” field. When overloading is enabled, this is equivalent to

get videoCodecAlphaMeta #meta