IWMEncAudioSource.ContentEDL

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The ContentEDL property specifies and retrieves the edit decision list (EDL) to use with speech content.

Syntax

IWMEncAudioSource.ContentEDL = String
String = IWMEncAudioSource.ContentEDL

Parameters

This property takes no parameters.

Property Value

A String indicating the full path and file name of the EDL.

If this property fails, it returns an error number.

Return code Number Description
NS_E_INVALIDCALL_WHILE_ENCODER_RUNNING 0xC00D1B66L This property cannot be set while the encoder engine is running.
NS_E_SPEECHEDL_ON_NON_MIXEDMODE 0xC00D1B92L The content mode must be set to mixed mode before calling this method.

Remarks

The EDL is a Unicode text file that contains the version number (which must be 1), the number of non-speech segments, and a list of start and end times (in milliseconds) indicating the non-speech segments. The rest of the content is assumed to be speech. Delimiters can be commas, spaces, or carriage returns. For example, if music occurs between 0 and 10 seconds and between 50 and 80 seconds, the EDL might appear as follows:

1,
2,
0, 10000,
50000, 80000

The ContentEDL property is only available when the ContentMode property is set to mixed mode.

To use an EDL for speech optimization, the input cannot be a live source and the output cannot be a broadcast.

Example Code

' Create a WMEncoder object.
  Dim Encoder As WMEncoder
  Set Encoder = New WMEncoder

' Create a source group.
  Dim SrcGrpColl As IWMEncSourceGroupCollection
  Dim SrcGrp As IWMEncSourceGroup
  Set SrcGrpColl = Encoder.SourceGroupCollection
  Set SrcGrp = SrcGrpColl.Add("SG_1")

' Add an audio source to the source group and specify an input file.
  Dim SrcAud As IWMEncAudioSource
  Set SrcAud = SrcGrp.AddSource(WMENC_AUDIO)
  SrcAud.SetInput "C:\InputFile.avi" ' REPLACE THIS.

' Specify mixed (audio and speech) mode.
  SrcAud.ContentMode = WMENC_AUDIOCONTENT_MIXED_MODE

' Specify the full path and file name of the EDL.
  SrcAud.ContentEDL = "C:\EDL.txt" ' REPLACE THIS.

Requirements

Reference: Windows Media Encoder

Library: wmenc.exe

See Also