As far as I know, TIF's inherently have an alpha channel (3 8-bit color
channels plus a 4th channel, making it 32 bits). I didn't know about how
PPro would handle it, so I thought I'd do an experiment with a video made by
a Canon using PPro > Export > Media. I chose tiff as the Format and Full HD
TIFF as the Preset, which is about all one can do. The file got written OK,
but when I opened it in Photoshop, the alpha channel is blank. Apparently in
your case yours isn't blank.
Nevertheless, I see the issue; since you have data in your alpha channel,
and though you could turn that layer off in Photoshop (in the Channels
panel) by clicking its eyeball, you don't want to have to do it for very
many files.
Since a tiff by definition includes an alpha channel, and you don't want
one, couldn't you export jpeg instead? PPro gives you that option in the
Format dropdown.
Just a thought . . .
Lee
From: [email protected] [mailto:[email protected]]
On Behalf Of Bob
Sent: Sunday, September 26, 2010 7:31 PM
To: [email protected]
Subject: [AP] exporting a frame
Hi everybody,
I've just exported a lot of individual frames from Premiere CS5, and have
discovered that an alpha channel is included in the .tif file. Is there a
way to, by default, not include an alpha channel?
The alpha channel becomes apparent when I open the file in Photoshop CS5. I
don't see any preference setting in either Premiere or Photoshop that
addresses an alpha channel by default
The video is AVCHD, 30p. I'm taking the frames of the .mts file, taken
unrendered from the timeline.
Thanks for any thoughts about this minor issue. It could become a recurring
issue for me, since the HD frames are so much better looking than frames
from SD footage.
Bob
[Non-text portions of this message have been removed]
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