Grass Valley iTX Desktop v.2.6 - Manual (Page 312)

Preparing media items for playout
The duration changes automatically when you move either the in-point or the out-point.
The out-point moves when you change the duration.
Change aspect-ratio properties for a video clip
The Property Editor displays details of the source format and active region for a video clip.
• The source format is the aspect ratio of the video frame; this may be 4:3 or 16:9.
• The active region describes how the video image is inset into the video frame and takes
account of any horizontal or vertical bars. For example, a 4:3 frame may contain a 16:9
letterboxed image.
These two properties together form an AFD (Active Format Description) code that iTX can
transmit in the output video signal. The code is used by digital television receivers to display
the video content in the best way.
The Property Editor displays a symbol to represent the AFD code:
1. To change the source format by itself, select an aspect ratio in the Source Format box.
2. To change the active region by itself, select an image arrangement in the Active Region
box.
3. To change both properties by selecting an AFD symbol, do the following.
• Click the AFD symbol to display the Source Formats and Active Regions dialog.
• Select the AFD symbol for a particular combination of source format and active region.
• Click OK to close the dialog.
Change the field playout order
iTX displays the alternate fields of interlaced video files in a particular (default) order during
playout.
In some files, the field order may be different to the default playout order; iTX then has to
display the fields in the reverse order. You identify these files by selecting the Reverse Field
Order flag.
1.
Select the Reverse Field Order check box for any file encoded with fields in reverse order;
ensure the check box is cleared for files with fields in the normal order.
March 2015 iTX Desktop: Operator Manual 292