Vista H.264 Codec

The Microsoft Media Foundation H.264 video encoder is a Media Foundation transform that supports the following H.264 profiles.

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DivX H.264 Decoder is small-sized, yet powerful codec that allows you to decode video files and to improve their quality.

A DirectShow filter aimed at decoding H.264/AVC video files; it performs comparably to CoreAVC.

The main advantage of this codec is the use of an advanced compression method which allows you to obtain high-quality videos while keeping the bit rate low.

The H.264 standard itself is superior to other commonly used formats.

This format is suitable for any platform, from hand-held to high definition.

The codec is easy to use and once you install it, you will get a configuration window which enables you to use all its functions.

The installation is fast and simple and the application uses very little of the system s resources.

Out of its many features, DivX H.264 Decoder enables its users to toggle multithreading, or to obtain higher performance when playing a video on a multi-core computer. Furthermore, you have the possibility to adjust the video material smoothing sharpness, deinterlacing, correcting brightness, contrast and saturation.

You don t need to worry about ruining the quality of your videos, since you can always go back to their initial state, by using the Default button and the slider buttons can be translated to both positive and negative values if you have altered the original too much.

Another advanced option of the DivX H.264 Decoder is choosing pixel aspect ratio. You can select from the Original Trust Container and Bitstream and you can switch between PAL and NTSC video formats.

In conclusion, DivX H.264 Decoder is a useful, advanced piece of software that extracts the best out of your video contents using the H.264 codec.

You obtain results immediately due to the fast and simple access to video configuration, while keeping file size reasonably small.

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The Media Foundation H.264 video decoder is a Media Foundation Transform that supports decoding of Baseline, Main, and High profiles, up to level 5.1.

H.264 codecs compress digital video files so that they only use half the space of MPEG-2, to deliver the same quality video. An H.264 encoder delivers high-quality.

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H.264 Video Decoder

The Media Foundation H.264 video decoder is a Media Foundation Transform that supports decoding of Baseline, Main, and High profiles, up to level 5.1.

The H.264 video decoder exposes the following interfaces.

ICodecAPI supported in Windows 8

Call the MFTEnum or MFTEnumEx function.

Call CoCreateInstance. The CLSID for the decoder is CLSID_CMSH264DecoderMFT, declared in wmcodecdsp.h.

Input Types

The input type must contain at least the following two attributes:

Attribute

MFVideoFormat_H264 or MFVideoFormat_H264_ES

If the input type contains only these two attributes, the decoder will offer a default output type, which acts as a placeholder. When the decoder receives enough input samples to produce an output frame, it signals a format change by returning MF_E_TRANSFORM_STREAM_CHANGE from IMFTransform::ProcessOutput. See the ProcessOutput documentation for details about handling format changes.

To avoid an initial format change, provide as much information in the input type as possible, including:

MF_MT_INTERLACE_MODE

Interlace mode.

Note  In H.264 video, the interlace structure can change dynamically, so the recommended value of this attribute is MFVideoInterlace_MixedInterlaceOrProgressive. Interlace information in the video elementary stream takes precedence over the media type. For more information, see Video Interlacing.

Pixel aspect ratio.

The input type must be set before the output type. Until the input type is set, the encoder s IMFTransform::SetOutputType method returns MF_E_TRANSFORM_TYPE_NOT_SET.

Output Types

The decoder supports the following output subtypes:

MFVideoFormat_I420

For more information about these subtypes, see Video Subtype GUIDs.

Transform Attributes

The H.264 decoder implements the IMFTransform::GetAttributes method. Applications can use this method to get or set the following attributes.

Indicates that the decoder supports DirectX Video Acceleration DXVA. Treat as read-only.

In Windows 8, the H.264 decoder also supports the following attributes.

Specifies whether a decoder exposes IYUV/I420 output types suitable for transcoding before other formats.

In Windows 8, the H.264 decoder supports the ICodecAPI interface. This interface provides an alternativate API for setting the following codec properties.

The decoder supports the following formats:

Profiles/Levels

Baseline, Main, and High profiles, up to level 5.1. See ITU-T H.264 specification for details.

Chroma Formats

Maximum Resolution

4096 2304 pixels

The maximum guaranteed resolution for DXVA acceleration is 1920 1088 pixels; at higher resolutions, decoding is done with DXVA, if it is supported by the underlying hardware, otherwise, decoding is done with software.

Note  In Windows 7, the maximum supported resolution is 1920 1088 pixels for both software and DXVA decoding.

DXVA

The decoder supports DXVA version 2, but not DXVA version 1. DXVA decoding is supported only for Main-compatible Baseline, Main, and High profile bitstreams. Main-compatible Baseline bitstreams are defined as profile_idc 66 and constrained_set1_flag 1.

Input data must conform to Annex B of ISO/IEC 14496-10. The data must include the start codes. The decoder skips bytes until it finds a valid sequence parameter set SPS and picture parameter set PPS in the byte stream.

The decoder does not support Film Grain Technology.

Note  A previous version of the documentation incorrectly stated that the decoder is supported on Windows Server 2008 R2.

If Platform Update Supplement for Windows Vista is installed, the H.264 video decoder is available on Windows Vista, but is accessible on Windows Vista only by using the Source Reader.

Requirements.

The H.264 Codec In Windows XP And Windows Vista AVIVO HD vs. Purevideo HD Part 3: Midrange and Low-end Card Performance. By Don Woligroski October 26, 2007.