• Adobe After Effects

  Does Aftereffects have problems with simple DV-Codec (with link to examples)

  Posted by __peter__ on April 16, 2006 at 4:31 pm

  Hello again 🙂

  I had this problem so many times (in AE 6.5 and asked before here) but this time I want to know 🙂

  When I import DV-Clips from Premiere into Aftereffects I sometimes notice “interlacing-like” artifacts on fast motions in the picture.

  After my search for the reason I would meanwhile say:
  Aftereffects is shifting Luma and Chroma channels somehow.

  It looks like a interlacing problem, but I am no longer sure if it really is.

  I use EXACTLY the same dv-clip in Premiere and Aftereffects and it looks fine in Premiere and bad in Aftereffects. When I then export that clip from premiere as a uncompressed AVI it’s also fine in Aftereffects. So what strange thing is that again ?!?

  I uploaded some sample pictures to make it more clear:

  https://www.perix.de/cc/ae-dv-problem.html

  What is this and what to to about it ?

  Thanks for any idea !

  Peter 🙂

  __peter__ replied 20 years, 1 month ago 2 Members · 6 Replies
• 6 Replies

• 

  Mike Smith

  April 16, 2006 at 4:54 pm

  I haven’t seen interlacing-like problems with DV in AE. DV in PAL is lower field first, of course … Not sure why you would de-interlace in Photoshop.
• 

  __peter__

  April 16, 2006 at 5:01 pm

  Thanks for Your reply 🙂

  I normally don’t interlace in photoshop. It’s just to make the samplepictures a littel easier to view. The footage is extreme fast panning and you don’t see the problem areas that good when not deinterlaced.

  I tried all combinations of field-order. No difference. And again: Everything is fine with a uncompressed AVI from Premiere.

  Some more ideas someone, please ?

  Peter 🙂
• 

  __peter__

  April 17, 2006 at 9:48 pm

  Thanks for Your reply.

  But I am 100% aware of fields. And of course I usually interpret the footage, but I wanted the picture as “untouched” as possible to show here. The artifacts are even more than one line of pixels. Somehow its seems to be the chroma channel (which has lower resolution in dv) ALONE is wrong. So anyway, field interpretation is not the solution.

  Any more ideas ?

  Thanks

  Peter
• 

  __peter__

  April 18, 2006 at 3:37 pm

  No, nothing. I did the footage only for this posting, to make the problem clear. So there is strictly nothing done to it, that could have bad influence to the result.

  Just shot – captured and (as explained why) deinterlaced in Photoshop.

  Thanks for Your help so far.

  But still I have no idea where these artifacts come from …

  Thanks for any further help!

  Peter
• 

  __peter__

  April 18, 2006 at 6:44 pm

  This could be something …

  But maybe I didn’t make it clear in my first posting:

  I DO use the same clip in Premiere and Aftereffects. And that’s where the problem starts.

  When I export an avi from Premiere as Uncompressed AVI it then ALSO works in Aftereffects.

  So if I’ve got you right: Premiere is converting it to RGB as it was recorded in YUV.

  So the big question is: Am I the only one that records dv clips and wants to use them in AE ? I guess not 🙂
  So there is:
  a) something I have to change while capturing
  b) thousands of people have the same problem and do not notice it. I hope for a) 🙂

  This clip was recorded via firewire with the standard premiere capture dialog. I don’t know where to change something about what color-range to capture with.

  And the other thing: Isn’t YUV just a limitation in range of RGB ?

  So my most important thing would be: How to capture right.

  Any ideas ?

  Thanks again !!!

  Peter
• 

  __peter__

  April 18, 2006 at 7:44 pm

  Thanks for Your help.
  At least I have new ideas to experiment with 🙂

  Thanks again!

  Peter

Reply to this Discussion! Login or Sign Up