The REALmagic MPEG-4 Video Codec is compliant with ISO MPEG-4 Advanced Simple Profile level 5 (without quarter pixel (QPEL) and global motion compensation (GMC)). REALmagic MPEG-4 Video Codec is fully compatible with the REALmagic Xcard, Sigma Designs high-performance multimedia playback PC card. The REALmagic MPEG-4 Video Codec supports both progressive and interlaced video encoding with arbitrary bit rates, resolutions, and frame rates. REALmagic MPEG-4 Video Codec uses advanced encoding tools defined in MPEG-4 advanced simple profile to provide the highest video quality at low bit rates.

This document explains how to use the Video for Windows (VFW) interface of REALmagic MPEG-4 Video Codec, and how to configure the codec for optimum quality.

REALmagic MPEG-4 Video Codec includes four rate control modes: constant bit rate (CBR), variable bit rate (size), variable bit rate (quality) and variable bit rate (quantizer). REALmagic MPEG-4 Video Codec fully supports interlaced video encoding. Interlaced video is most commonly found in material intended for TV broadcast. Depending on your decoder, header information may cause compatibility issues during playback. The REALmagic Xcard supports RMP4, DX50, and DIVX.

The REALmagic MPEG-4 Video Codec possesses two independent quantization matrices. In some cases, using alternate vertical scan generates better quality. REALmagic MPEG-4 Video Codec provides this tool to improve interlaced video encoding quality. Alternate vertical scan needs decoder support. The REALmagic Xcard fully supports this function.

REALmagic MPEG-4 Video Codec is designed for:
WinXP,WinVista,WinVista x64,Win2000,Win98,

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