The portion of the file holding the video data. The video data might be compressed to save disk space. The data has to be decompressed using a video decompressor before you can play (see) it.

LEAD MPEG-4 Encoder ICodecAPI Support

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The LEAD MPEG-4 Encoder implements the ICodecAP interface and can be configured by setting any of the supported properties through this interface.

Descriptions of supported transform properties are provided in the following table:

Codec API Property	Description	Property in ILMFMP4Encoder Interface
CODECAPI_AVEncCommonRateControlMode	Specifies the rate control mode, Possible values are ( members of eAVEncCommonRateControlMode enumeration): eAVEncCommonRateControlMode_Quality: Use the CODECAPI_AVEncCommonQuality property value to regulate the image quality. eAVEncCommonRateControlMode_PeakConstrainedVBR: Vary the quality over short durations. However, it will achieve an average rate matching the CODECAPI_AVEncCommonMeanBitRate property value. eAVEncCommonRateControlMode_CBR: Adhere strictly to the rate specified in the CODECAPI_AVEncCommonMeanBitRate property.	CompressionMode
CODECAPI_AVEncCommonMeanBitRate	Specifies the average or constant bitrate used when the CODECAPI_AVEncCommonRateControlMode is set to eAVEncCommonRateControlMode_CBR or eAVEncCommonRateControlMode_PeakConstrainedVBR. The value is in bits per second.	BitRate
CODECAPI_AVEncCommonQuality	Specifies the quality factor for encoding. The quality factor is used in compressing the video stream . The lower the quality factor, the better the quality. Possible values range from 1 (best) to 31 (worst).	QFactor
CODECAPI_AVEncCommonMultipassMode	Specifies the number of encoding passes that the encoder supports. Possible values are 1(default) or 2.	EncodingPasses
CODECAPI_AVEncMPVQScaleType	The quantization method applied. Possible values are (members of the eAVEncMPVQScaleType enumeration): eAVEncMPVQScaleType_Linear: Use H.263 quantization. eAVEncMPVScanPattern_AlternateScan: Use MPEG quantization.	QuantType