When this property is set it will cause the encoder to use the specified QP to encode the next frame and all subsequent frames until a new QP is specified. This is a VT_UI4 value.įorces the encoder to code the next frame as a key frame. Internally, this value is mapped to a smaller set of quality/speed levels supported by the encoder. At higher complexity levels, the encoder runs more slowly but produces better quality at the same bit rate. This value affects how the encoder performs various encoding operations, such as motion compensation. This is a VT_UI4 value.Įnables or disables low-latency mode. If zero, the encoder selects the GOP size. Sets the number of pictures from one GOP header to the next, including the leading anchor but not the following one. Sets the maximum bitrate for rate control modes that allow a peak bitrate. Sets the buffer size, in bytes, for constant bit rate (CBR) encoding. Sets the average bit rate for the encoded bit stream, in bits per second. If other modes are specified, the eAVEncCommonRateControlMode_CBR rate control will be used. It supports the following properties.įor the codec requirements for HCK encoder certification, see the Certified Hardware Encoder section below. The H.265 encoder implements the ICodecAPI interface for setting encoding parameters. The following methods of the ICodecAPI interface are supported for the H.265/HEVC encoder:Īll other ICodecAPI methods will return the error E_NOTIMPL. The following methods of the IMFTransform interface are supported for the H.265/HEVC encoder:Īll other IMFTransform methods will return the error E_NOTIMPL. This attribute contains the sequence header. The default value is 1:1.Īfter the output type is set, the video encoder updates the type by adding the MF_MT_MPEG_SEQUENCE_HEADER attribute. For more information about profile and level constraints, refer to Annex A of ITU-T H.265. Must be MFVideoFormat_HEVC.Īverage encoded bit rate, in bits per second. Set the following attributes on the output media type. The encoder supports a single output subtype: Until the output type is set, the encoder's IMFTransform::SetInputType method returns MF_E_TRANSFORM_TYPE_NOT_SET.
The output type must be set before the input type. The input media type must have one of the following subtypes:įor more information about these subtypes, see Video Subtype GUIDs. The H.265 video encoder exposes the following interfaces: The encoder supports the following profiles:
The Media Foundation H.265 video encoder is a Media Foundation Transform that supports encoding content into the H.265/HEVC format.
0 kommentar(er)
