QMedia Movie track commands

QM_SetTrackVolume

QM_SetTrackVolume(movieRef; trackID; trackVolume):error
movieRef Longint Movie reference
trackID Longint Track ID
trackVolume Longint Track volume
error Longint Error result

Changes the sound volume of a track.

Parameter movieRef is the reference to the movie instance. The movie reference must have been previously obtained with a call to QM_NewMovieFromFile or QM_NewMovieFromURL.

Parameter trackID is the ID of the track.

Parameter trackVolume specifies the track's sound volume. It must be in the range of -255...255. A value of 0 means no sound at all. Negative values also mute the track, but they preserve the absolute sound volume value.

Example

  `Set the volume of track ID $trackID of movie $movie to maximum
 
C_LONGINT($volume)
 
$volume:=255
 
$err:=QM_SetTrackVolume ($movie;$trackID;$volume)
 
 

Related commands

QM_GetTrackVolume Returns the track's sound volume.

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