AudioNumPasses

Description

Sets the number of passes to be used when encoding the audio stream.

Syntax

[C#/C++]
public long AudioNumPasses;

[VB.NET]
Public Property AudioNumPasses As Long

Remarks

Codecs may support up to two passes, so this value may be 1 or 2. In general, more passes in the encoding process means higher quality.

To find audio codecs that support two pass encoding, use the IWMCodecInfo3 interface defined in the Windows Media Format 9.5 SDK. Its SetCodecEnumerationInfo method can be used to selectively return codecs that support 1 or 2 passes.

See Exporting to Windows Media Video and Enumerating Audio Codecs for some sample code and more help, and see the Windows Media Format 9.5 SDK help at http://msdn.microsoft.com.
 

See also

FBExportToWMVParams:AudioFormatID  FBExportToWMVParams::AudioCodecID  FBExportToWMVParams::AudioVBR