QMedia Movie preview, poster, and pict commands |

### QM_SetPreviewTime

QM_SetPreviewTime(movieRef; previewStart; previewDuration):error
| movieRef | Longint | Movie reference
| previewStart | Longint | Preview start point
| previewDuration | Longint | Preview duration
| error | Longint | Error result

Sets the preview time of a movie.

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 previewStart specifies the starting point of the movie's preview.

Parameter previewDuration specifies the duration of the movie's preview.

Both previewStart and previewDuration must be expressed in the movie's time scale.

Example

``Set the preview of movie $movieRef to the first 5 seconds` `` `C_LONGINT($timeScale)` `$error:=QM_GetTimeScale ($movieRef;$timeScale)` `` `C_LONGINT($previewStart;$previewDuration)` `$previewStart:=0` `$previewDuration:=$timeScale*5` `` `$error:=QM_SetPreviewTime ($movieRef;$previewStart;$previewDuration)` ``

Related commands

QM_GetPreviewTime | Returns the movie's preview time.
QM_SetTrackUsage | Specifies the track's usage in the movie.
QM_GetTrackUsage | Returns the track's usage in the movie.

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