High End Systems DL.3 Defining a Media File Segment

CHAPTER 7
Graphic Functions: Defining Content
DL.3 Digital Light User Manual 63
Defining a Media File Segment
You can define any portion of a video media file to play using the In Frame and Out Frame
parameters. By default, the In Frame is the beginning of the media file and the Out Frame is the
end of the file. Media files can have different lengths.
In Frame and Out Frame Parameters
You can select any segment of a media file for playback by assigning an In Frame value as a
start point and an Out Frame as an end point.
Note: DMX parameter values for these parameters do not correspond to a
particular “frame”. They are defined as a percentage of the movie length.
This makes it possible to create segments with an Out Frame preceding
the In Frame and simplifies playback synchronization between media files.
The In Frame parameter corresponds to a 16-bit DMX value equal to a starting point for the
playback segment of the selected file. The Out Frame parameter corresponds to a 16-bit DMX
value equal to an end point for the playback segment of the selected media file.
Assigning the In Frame and Out Frame parameters to default DMX values will playback the
entire movie file. Choosing other settings are useful when you want to:
• begin or end a media file at any point other than the default
• start or stop on a specific image
• you need to shorten the media file to a specific length
In Frame Default DMX Value: 0 = The beginning of a media file is the playback start point.
Out Frame Default DMX Value: 65535 = The end of a media file is the playback endpoint.
As you move from 0 to 100% of the In Frame value range, you can select the beginning of a
media file segment as a percentage of the file length. Moving from 0 to 100% of the Out Frame
value range selects the end of a media file segment as a percentage of the file length.
Segment Selection Examples
You can create a segment anywhere between
the beginning and the end of a media file.
The In Frame does not have to precede the
Out Frame.
To skip a segment in the center of a media
file, set the In Frame to a point following the
Out Frame. The file will play from the In
Frame to the end and then start at the begin-
ning of the file and play to the Out Frame.
When you create a segment in this way, you
may notice a jump as playback skips from the
end of the file to the beginning.
File
Start File
End
In Frame
25%
In Frame
75%
Out Frame
75%
Out Frame
25%
Example 2
Example 1
File
Start File
End