// add the key frame sample to the sprite track media

    //

    // to add the sample data in a compressed form, you would use a QuickTime DataCodec to perform the

    // compression; replace the call to the utility AddSpriteSampleToMedia with a call to the utility

    // AddCompressedSpriteSampleToMedia to do this

    AddSpriteSampleToMedia(myMedia, mySample, kSpriteMediaFrameDuration, true, NULL);