Interpreting video footage (photoshop extended), Interpret video footage (photoshop extended), For more information, see – Adobe Photoshop CS4 User Manual
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USING PHOTOSHOP CS4
Video and animation
Last updated 1/10/2010
Replace footage in a video layer (Photoshop Extended)
Photoshop Extended tries to maintain the link between the video layer and source file even if you move or rename the
source. If the link breaks for some reason, an alert icon
appears on the layer in the Layers panel. To relink the video
layer to the source file, use the Replace Footage command. This command can also replace the video or image sequence
frames in a video layer with frames from a different video or image sequence source.
1
In the Animation or Layers panel, select the video layer that you want to relink to the source file or to replace the
content.
2
Choose Layer
> Video Layers > Replace Footage.
3
In the Open dialog box, select a video or image sequence file, and then click Open.
Interpreting video footage (Photoshop Extended)
Interpret video footage (Photoshop Extended)
You can specify how Photoshop Extended interprets the alpha channel and frame rate of the video you’ve opened or
imported.
1
In the Animation or Layers panel, select the video layer that you want to interpret.
2
Choose Layer
> Video Layers > Interpret Footage.
3
In the Interpret Footage dialog box, do any of the following:
•
To specify how the alpha channel in the video layer is interpreted, select an Alpha Channel option. The footage
must have an alpha channel for this option to be available. If Premultiplied-Matte is selected, you can specify the
matte color with which the channels are premultiplied.
•
To specify the number of video frames played per second, enter a Frame Rate.
•
To color-manage the frames or images in a video layer, choose a profile from the Color Profile menu.
Alpha channel interpretation in video and image sequences (Photoshop
Extended)
Video and image sequences with alpha channels can be straight or premultiplied. If you’re working with video or
image sequences containing alpha channels, it’s important to specify how Photoshop Extended interprets the alpha
channel to get the results you expect. When premultiplied video or images are in a document with certain background
colors, it’s possible to get undesirable ghosting or halos. You can specify a matte color so the semi-transparent pixels
blend (multiply) with the background without producing halos.
Ignore
Ignores the alpha channel in the video.
Straight-Unmatted
Interprets the alpha channel as straight alpha transparency. If the application you used to create
the video doesn’t premultiply the color channels, select this option.
Premultiplied-Matte
Uses the alpha channel to determine how much of the matte color to mix with the color channels.
If necessary, click the color swatch in the Interpret Footage dialog box to specify the matte color.