		err = GetMaxCompressionSize(GetPortPixMap(theGWorld),		/* Handle to the source image */
									trackFrame, 					/* bounds */
									kMgrChoose, 					/* let ICM choose depth */
									codecNormalQuality,				/* desired image quality */ 
									kAnimationCodecType,			/* compressor type */ 
									(CompressorComponent)anyCodec,  /* compressor identifier */
									&maxCompressedSize);		    /* returned size */