"Lock Position" for Channels and Alpha Channels

Sometimes, because of being too quick or sloppy, I accidentally move an alpha channel I'm working on. It would be nice if we had a "lock position" option like there is for Layers.

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    We've just now upgraded from Leopard to Snow Leopard and are having a problem with Apple ProRes 4444 and alpha channels in Motion 4.  A clip with an alpha which keyed perfectly before the upgrade, now will not key.  If I convert the clip to the Animation codec, it keys perfectly.  If I export the Motion project as a ProRes 4444 self contained movie, it will key when brought into FCP 7 but if I import the project into FCP 7, it will show the key in the viewer but not the canvas.  Has anyone seen this or have any suggestions on how to correct this?  Is it a bug? 
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  • No Method of Batch Export for Clips with Alpha Channels?

    Good morning,
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    Thanks, Andy, "Batch Export" eventually did the trick!
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  • Aperture, photoshop layers and Alpha channels - notes

    In examining Aperture 2.0 to see if I could use it instead of Adobe bridge in my workflow (which makes intense use of Photoshop) I found that Aperture (and, apparently, OS X) cannot properly display a preview for a .psd file with either layers or an alpha channel. In some cases, the preview image is simply an error message, in others the alpha channel is displayed as black. These problems make Aperture a non-starter for me.
    Searching this forum for information, solutions, and/or workarounds, I found some references, but nothing of high value. (Sorry, posters.) Started my own investigation, and discovered some things that might lead to a reasonable workaround. My notes are here:
    http://homepage.mac.com/bbarlow641/webinfonotebook/
    too long, I think, to put into a forum post. Sorry to link out to somewhere else, but if you're interested, it's worth a click. (Or the linked page may not have "high value" either. But it helped me to think through the problem.)
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    bbarlow641 wrote:
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    • Aperture automatically refreshes the saved file.
    This way I end up with just this one extra file. The whole procedure would be a bit simpler using referenced files instead of storing them in the library.
    My settings in PS do have the "Maximize Compatibility" option set (in the notebooked example, it's set to "ask", normally it's set to "always"). I'm using CS2. Maybe this setting works in CS3 to create the composite? I've heard several people here say that same thing, but it definitely doesn't do it for me...
    For me this works, and as far as I remember also worked in CS2; do you see a difference in file size between files saved both ways? How does Preview.app display the file saved with "Maximize Compatibility"?
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    Might something like a hot folder with an automator scripts attached to it be a possible workaround?
    Message was edited by: Bernhard Barkow

  • Issue (aka bug):  File compatibility and alpha channels

    When I enable file compatibility mode on photoshop (so that previews and thumbnails show up), the thumbnail and preview will be wrong when there's an alpha channel in the channel palette. Specifically, the thumbnail will be masked by the top-most alpha channel in the channel palette. Consequently, there is sort of a work-around--if you create a plain white alpha channel and make sure it's the top-most alpha channel in the palette, then the preview and thumbnail come out fine. Luckily, this requires negligible extra memory.
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    Bart

    Yes, everything in Bridge works great. However, the search function in Bridge is SLOW and a bit flaky (same problem on the Windows side as well) so I like to use spotlight instead for searching. Additionally, I like to use iPhoto to create collections of images that will contain photoshop files as well as others.
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  • Drop Zones: Video and Alpha Channels

    Is it possible to create a drop zone where the asset is a video clip that contains transparency by way of an alpha channel such that portions of the video allow for the background image to show through?
    I am familiar with setting up drop zones and custom shapes and I have used static images with transparency, but I've never done the same with video.
    I am away from my system right now or I could test this myself. Thanks in advance for the help!

    hi
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    Hello --
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    Thanks, but something is not working.
    Going back to your original post, when I do Cmd-J, then set transparency to "Straight Alpha," the movie background immediately changes from black to white. So far so good. But if I export that movie as MOV (Animation, no compression, millions of colors+), then bring it back in, and confirm with Cmd-J, the transparency setting is gone. Am I missing something?

  • Cinema 4D in AE and alpha channel

    So I used C4D to render out a logo animation.  I used openEXR format and made sure I checked the box for alpha channel.  When I bring it over to AE, it's just the standard black background and I can't figure out how to get stuff to show up behind it.  (I was trying to play with some Particular stuff.) 
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    Chase Chick wrote:
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    I don't know C4D, but maybe the picture viewer doesn't hold an alpha channel. Is there another option to render to a file directly?
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    When I open an image in Photoshop using 'Open with External Editor', and add an alpha channel, when I save it back to Aperture the alpha mask shows on top of the image, whether or not it is made visible in Photoshop. Furthermore, the thumbnail shows the mask as white and the image shows the mask as black.
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    Search the discussions on a couple of these terms -- there was a thread or two a couple of months ago.
    It turns out (I can't remember who pointe this out! sorry!) that if you put a completely blank alpha channel at the top of the stack of them (that is, under the R, G and B channels in the Channels palette), then save, the image shows up OK.

  • Exporting Targa Sequence and Alpha Channel

    I have a couple of targa sequence containing graphics that I need to export. One has an opaque arrow which rolls out over the film underneath. The second has solid text which will be laid over the arrow as it animates. I have run the image sequences in Quicktime, the arrow sequence comes out as a block of black and the solid text comes out against a black background instead of an alpha channel and I can't seem to manipulate them. I have FCP 6 which i thought had Quick Time Pro to handle alpha channels. What am I doing wrong, can anyone help?

    hi,
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