• Adobe After Effects

  After Effects crash when “color depth” switched to 16 bit

  Posted by Philippe Brunot on February 15, 2014 at 8:57 pm

  Hi Guys,

  AE imports my QT Ref correctly, but when I try to switch the composition settings from 8 bit per channel to 16 bit per channel, AE systematically crashes… (The AE picture preview turns black, and then AE crashes)

  Note: the QT Ref is an AVID export.

  The reason I’m trying to switch color depth is because I want to create a DCP. I am trying to do so via OpenDCP, but this tutorial requires that the color depth be 16 bit:
  https://dannylaceyfilm.blogspot.co.uk/2012/06/getting-to-grips-with-making-digital.html

  I hope someone can help me 🙂

  Philippe Brunot replied 12 years, 7 months ago 4 Members · 8 Replies
• 8 Replies

• 

  Roland R. kahlenberg

  February 16, 2014 at 3:30 am

  Try using an actual QT movie instead of a QT Ref.

  HTH
  RoRK
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• 

  Terrence Meiczinger

  February 16, 2014 at 4:14 am

  You don’t need to convert to 16-bit. OpenDCP will accept 8-bit.
• 

  Philippe Brunot

  February 16, 2014 at 5:56 pm

  I’ve tried using an actual QT movie (Avid DNxHD codec) instead of a QT Reference and the problem stays the same: AE crashes when I try to switch to 16bpc…

  I understand OpenDCP accepts 8-bit, but I want to upscale my film size from 1920×1080 to 3996×2160(4K) and loose as little quality as possible in process.
• 

  Terrence Meiczinger

  February 16, 2014 at 8:23 pm

  Is your source 16-bit or 8-bit? If it’s 8-bit, then leave it at 8-bit. If your material is 2K, it’s most likely going to look better shown at 2K rather than an upscale to 4K. It will also be smaller and faster to render.
• 

  Todd Kopriva

  February 19, 2014 at 12:12 am

  Would you be willing to send us a small example file that causes this crash?

  You can send a bug report with attachments to aebugs (at) adobe [dot] com.

  ———————————————————————————————————
  Todd Kopriva, Adobe Systems Incorporated
  After Effects quality engineering
  After Effects team blog
  ———————————————————————————————————
• 

  Philippe Brunot

  February 19, 2014 at 8:57 pm

  Thank you Terrence, so I will leave my footage at 8bit and only upscale my frame size from 1920×1080 to 2K (1998×1080).

  As a result, I will be making a DCP with the following specs:
  – 8 bits of color per channel
  – 2K (1998×1080)
  – 25fps
• 

  Terrence Meiczinger

  February 20, 2014 at 5:21 pm

  You don’t have to change your image aspect either, you can keep it at 1920×1080 and it will show fine using the flat mode. You’ll end up with 39 pixels of black on both sides which most people wont even notice. Just another option.
• 

  Philippe Brunot

  February 21, 2014 at 8:47 pm

  OK great, I’ll leave it at 1920×1080 as suggested.

  Thanks again for your insights.

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