AVCodecParameters

public final class AVCodecParameters

This class describes the properties of an encoded stream.

  • Create a new AVCodecParameters and set its fields to default values (unknown/invalid/0).

    Declaration

    Swift

    public init()

  • General type of the encoded data.

    Declaration

    Swift

    public var mediaType: AVMediaType { get set }

  • Specific type of the encoded data (the codec used).

    Declaration

    Swift

    public var codecId: AVCodecID { get set }

  • Additional information about the codec (corresponds to the AVI FOURCC).

    Declaration

    Swift

    public var codecTag: UInt32 { get set }

  • Extra binary data needed for initializing the decoder, codec-dependent.

    Must be allocated with AVIO.malloc(size:) and will be freed by avcodec_parameters_free(). The allocated size of extradata must be at least extradataSize + AVConstant.inputBufferPaddingSize, with the padding bytes zeroed.

    Declaration

    Swift

    public var extradata: UnsafeMutablePointer<UInt8>? { get set }

  • The size of the extradata content in bytes.

    Declaration

    Swift

    public var extradataSize: Int { get set }

  • The average bitrate of the encoded data (in bits per second).

    Declaration

    Swift

    public var bitRate: Int64 { get set }

  • Copy the contents from the supplied codec parameters.

    Declaration

    Swift

    public func copy(from codecpar: AVCodecParameters)

  • Fill the parameters struct based on the values from the supplied codec context.

    Declaration

    Swift

    public func copy(from codecCtx: AVCodecContext)

Video

  • The pixel format of the video frame.

    Declaration

    Swift

    public var pixelFormat: AVPixelFormat { get set }

  • The width of the video frame in pixels.

    Declaration

    Swift

    public var width: Int { get set }

  • The height of the video frame in pixels.

    Declaration

    Swift

    public var height: Int { get set }

  • The aspect ratio (width / height) which a single pixel should have when displayed.

    When the aspect ratio is unknown / undefined, the numerator should be set to 0 (the denominator may have any value).

    Declaration

    Swift

    public var sampleAspectRatio: AVRational { get set }

  • Number of delayed frames.

    Declaration

    Swift

    public var videoDelay: Int { get set }

Audio

  • The sample format of audio.

    Declaration

    Swift

    public var sampleFormat: AVSampleFormat { get set }

  • The channel layout bitmask. May be 0 if the channel layout is unknown or unspecified, otherwise the number of bits set must be equal to the channels field.

    Declaration

    Swift

    public var channelLayout: AVChannelLayout { get set }

  • The number of audio channels.

    Declaration

    Swift

    public var channelCount: Int { get set }

  • The number of audio samples per second.

    Declaration

    Swift

    public var sampleRate: Int { get set }

  • Audio frame size, if known. Required by some formats to be static.

    Declaration

    Swift

    public var frameSize: Int { get set }