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How to Add Audio or Video Effects

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[The feature associated with this page, MFPlay, is a legacy feature. It has been superseded by MediaPlayer and IMFMediaEngine. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer and IMFMediaEngine instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

This topic describes how to use audio/video effects with MFPlay.

To use an effect with MFPlay, the effect must be implemented as a Media Foundation transform (MFT). For more information, see Media Foundation Transforms.

To Add an Audio or Video Effect

  1. Create an instance of the MFT that implements the effect.
  2. Call IMFPMediaPlayer::InsertEffect.

Call InsertEffect before you open the media file for playback. MFPlay automatically determines whether the effect is a video effect or audio effect.

The InsertEffect method also takes a Boolean parameter that specifies whether the effect is optional or required. If MFPlay cannot add a required effect (for example, because the stream format is incompatible), a playback error occurs. In most cases, it is better to set an effect as optional.

MFPlay continues to use the effect for all subsequent playback. To remove the effect, call IMFPMediaPlayer::RemoveEffect or IMFPMediaPlayer::RemoveAllEffects.

HRESULT AddPlaybackEffect(REFGUID clsid, IMFPMediaPlayer *pPlayer)
{
    IMFTransform *pMFT = NULL;

    HRESULT hr = CoCreateInstance(clsid, NULL, CLSCTX_INPROC_SERVER, 
        IID_PPV_ARGS(&pMFT));

    if (SUCCEEDED(hr))
    {
        hr = pPlayer->InsertEffect(pMFT, TRUE); // Set as optional.
    }

    SafeRelease(&pMFT);
    return hr;
}

Requirements

MFPlay requires Windows 7.

Using MFPlay for Audio/Video Playback