ImageDescriptionHandle      myDesc = NULL;

#if USES_MAKE_IMAGE_DESC_FOR_EFFECT

        OSErr                       myErr = noErr;

        // create a new sample description for the effect - we use

        // the MakeImageDescriptionForEffect function if we want to

        // create stacked effects, where one effect track acts as a

        // source for another effect

        myErr = MakeImageDescriptionForEffect(myEffectCode, &myDesc);

        if (myErr != noErr)

            BailError(myErr);

#else

        // create a new sample description - in this case, we'll construct

        // the image description ourselves using the NewHandleClear function,

        // since we're not going to create a stacked effect (in which case

        // you'd need to use MakeImageDescriptionForEffect as described above)

        myDesc = (ImageDescriptionHandle)NewHandleClear(sizeof(ImageDescription));

        BailNil(myDesc);

        (**myDesc).idSize = sizeof(ImageDescription);

        (**myDesc).cType = myEffectCode;

        (**myDesc).hRes = 72L << 16;

        (**myDesc).vRes = 72L << 16;

        (**myDesc).dataSize = 0L;

        (**myDesc).frameCount = 1;

        (**myDesc).depth = 0;

        (**myDesc).clutID = -1;

#endif

        // fill in the fields of the sample description

        (**myDesc).vendor = kAppleManufacturer;

        (**myDesc).temporalQuality = codecNormalQuality;

        (**myDesc).spatialQuality = codecNormalQuality;

        (**myDesc).width = videoTrackFXWidth >> 16;

        (**myDesc).height = videoTrackFXHeight >> 16;