Adobe Photoshop CC 2014 v.14.xx - Manual (Page 738)

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Ignore
Straight-Unmatted
Premultiplied-Matte
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
Interpret video footage
You can specify how Photoshop CS6 or Photoshop Extended CS5 interprets the alpha channel and frame rate of the video you’ve opened or
imported.
1. In the Animation (Photoshop Extended CS5), Timeline (CS6), 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
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 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.
Ignores the alpha channel in the video.
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.
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.
Item with premultiplied channels (top) appears with a black halo when interpreted as Straight-Unmatted (lower-left). When interpreted as
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