Use this attribute to specify the encoded bit rate. The default bit rates are 128 Kbps for mono and 320 Kbps for stereo. Attributeīit rate of the encoded MP3 stream, in bytes per second. Set the following attributes on the output media type. The output type must be set before the input type.
The MP3 encoder supports the following media types.
The class identifier (CLSID) of the MP3 encoder is CLSID_MP3ACMCodecWrapper, defined in the header file wmcodecdsp.h.
The Microsoft Media Foundation MP3 audio encoder is a Media Foundation Transform (MFT) that encodes MPEG-1 layer 3 (MP3) audio.
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