Class VideoBackend

Namespace

Stride.Video

Assembly

Stride.Video.dll

Per-VideoInstance playback backend. Concrete subclasses wrap a specific decoding implementation (FFmpeg, Windows Media Foundation, Android MediaCodec, ...). Instances are produced by CreateBackend(VideoInstance) at media-initialization time.

public abstract class VideoBackend : IDisposable

Inheritance

object

VideoBackend

Implements

IDisposable

Extension Methods

ComponentBaseExtensions.DisposeBy<T>(T, ICollectorHolder)

ComponentBaseExtensions.RemoveDisposeBy<T>(T, ICollectorHolder)

UnsafeUtilities.As<T>(object?)

Constructors

VideoBackend(VideoInstance)

protected VideoBackend(VideoInstance instance)

Parameters

instance VideoInstance

Properties

Instance

protected VideoInstance Instance { get; }

Property Value

VideoInstance

UsesHardwareDecode

True when this backend currently decodes via hardware (e.g. D3D11VA, NVDEC). May only become accurate after Initialize(string, long, long) and possibly Play(), depending on when the backend negotiates the codec.

public virtual bool UsesHardwareDecode { get; }

Property Value

bool

Methods

Dispose()

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

public virtual void Dispose()

Initialize(string, long, long)

Open url for playback. Return false on failure.

public abstract bool Initialize(string url, long startPosition, long length)

Parameters

url string

startPosition long

length long

Returns

bool

Pause()

public virtual void Pause()

Play()

public abstract void Play()

ReleaseMedia()

Release the currently-open media. Counterpart to Initialize(string, long, long).

public virtual void ReleaseMedia()

Seek(TimeSpan)

public virtual void Seek(TimeSpan time)

Parameters

time TimeSpan

SetAudioVolume(float)

public virtual void SetAudioVolume(float volume)

Parameters

volume float

SetPlaybackSpeed(float)

public virtual void SetPlaybackSpeed(float speed)

Parameters

speed float

Stop()

public abstract void Stop()

Update(TimeSpan)

Per-frame tick. May update CurrentTime via SetCurrentTime(TimeSpan), and may call back into Stop() or Seek(TimeSpan) on end-of-media / loop conditions.

public abstract void Update(TimeSpan elapsed)

Parameters

elapsed TimeSpan

UpdateLoopRange()

public virtual void UpdateLoopRange()

UpdatePlayRange()

public virtual void UpdatePlayRange()