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Activity Forums Avid Media Composer HD alpha out of AE into Symphony Nitris

  • HD alpha out of AE into Symphony Nitris

    Posted by Mark on September 12, 2007 at 2:43 pm

    Our graphics dep’t has created opens for upcoming season of HD hockey…. they have been rendered out in QT none.

    I tried importing using DNXHD220, but import times were brutal. Importing in 1:1 is half the time.

    My question, what format could they render to so that I can fast import. Most movies do have alpha channel, so DNXHD is out of the question. 1:1 doesn’t seem to offer alpha. Packed Codec renders, but if I invert the alpha then I lose the fill in Symphony.

    I need help…..these import times are killing me.

    Thanks.

    Mark

    Mark replied 18 years, 11 months ago 2 Members · 3 Replies
  • 3 Replies
  • Michael Hancock

    September 12, 2007 at 3:04 pm

    1:1 should support an alpha. I’m not sure why it isn’t. Have you tried Use Existing then Invert Existing for your alpha interpretation?

    For faster imports, about the only way you’ll get a fast import is to have them render to the Avid DNxHD 220 codec. As you know, however, it doesn’t support alpha channels.

    So…

    If your graphics department can/will, have them render the movie, then render the alpha (matte). Import both into your Avid, cut your fill in, alpha on a video track above it, collapse them together and drop a Matte Key effect on top (don’t Alt+Drop it, just drop it on top). If you want, open your effect editor and hold Alt+Drag (or Alt+Ctrl+Drag–not in front of the system right now) the effect icon to your bin. It will save your Matte Key effect with source, thereby giving you a clip of your animation with alpha that you load into your source monitor.

    This will take more render time on their end, but you’ll have fast import for both the matte and fill, then you just have to take a few seconds to combine them in your Avid and save the effect with source. If they’ll work with you on this, that’s how I’d go.

    Otherwise, you’re going to be stuck with longer import times. I can’t think of another way around it.

    Good luck, and let us know what you do.

    Michael.

  • Mark

    September 12, 2007 at 3:07 pm

    Thanks Michael…

    I had mentionned the idea of double rendering on their part….but that was not met favourably….. I guess i will be taking more coffee breaks for the longer renders.

    Thanks anyway

    Mark

  • Mark

    September 12, 2007 at 3:11 pm

    PS…

    I couldn’t find the alpha option for 1:1 in After Effects….it would appear that it does support alpha within the Avid app, but I can`t access it inside AE.

    Also, I just read your prfile….you are a promo guy…me too. I edit tons of promos, also had my hand in a good number of Promax awards over the past few years.

    Thanks for your help….I am still getting used to this system, but am enjoying it !-

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