IDvdControl2::SelectKaraokeAudioPresentationMode method (strmif.h)
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The SelectKaraokeAudioPresentationMode method sends karaoke auxiliary channels to the left or right speakers.
Syntax
HRESULT SelectKaraokeAudioPresentationMode(
[in] ULONG ulMode
);
Parameters
[in] ulMode
Bitwise OR of DVD_KARAOKE_DOWNMIX enumeration indicating how to downmix the five karaoke channels to channels 0 and 1, which are usually output to the left and right speakers.
Return value
Returns one of the following values.
| Return code | Description |
|---|---|
|
Success. |
|
The audio decoder does not support downmixing. |
|
The DVD Navigator filter is in an invalid domain. |
|
UOP control prohibits the current operation. |
Remarks
When the DVD Navigator enters karaoke mode, it queries the audio decoder to discover whether it supports karaoke downmixing. If the decoder supports it, then channels 2 through 4 (the karaoke auxiliary channels with the guide vocals, guide melodies, and sound effects) are muted. Use this method to turn individual channels on or off and direct them to channels 0 and 1.
This method is demonstrated in the DVDSample application in CKaraokeDlg::DoModal.
The following table shows the Annex J command name to which this method name corresponds, and the domains in which this method is valid.
| Annex J Command Name | Valid Domains |
| Karaoke_Audio_Presentation_Mode_Change |
|
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows XP [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | strmif.h (include Dshow.h) |
| Library | Strmiids.lib |