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Posted on Apple Discussion and was referred here for Blackmagic Interlacing Concern
My video is totally distorted and I don’t know what to do. A production house used Blackmagic to import the beta footage onto our harddrives. I downloaded blackmagic onto my computer.
The image has an interlacing problem- and not just because i am watching it on the computer monitor- because i have printed to dvd and the interlacing issue is still very much apparent when i watch it on a NTSC monitor. The image looks great (color,detail), except for when there is movement, and the movement is staggard/blurred/choppy… whatever- all of the above! I really am not sure how to solve this problem?
Within Final Cut 5, I cannot solve the distortion issue- hense I cannot export an appropriate video- so believe that somewhere in the mess of my settings in FCP- something terrible is being overlooked.
I have a sequence set at:
Frame size 720 x 486
Aspect Ratio: CCIR NTSC (40:27)… (The only other CCIR options to choose from are CCIR 601 NTSC Sq. (4:3), or PAL…)
Pixel Aspect Ratio: NTSC – CCIR 601/ DV (40:27)
Field Dominance: Lower (Even)
29.97
QUickTime Video Compressor: Blackmagic – Quality set for high
Video Processing Motion Filtering quality: BestI have a clip with item properties set at:
Frame size 720 x 486
Pixel Aspect Ratio: NTSC – CCIR 601
Field Dominance: Lower (Even)
Video Rate: 29.97 fps
Compressor: Uncompressed 8-bit 4:2:2
Data Rate: 20.3 MB/secI tried the sequence setting compressor as uncompressed 8-bit 4:2:2 before as well and was getting the same distortion issue.
When I export a quicktime movie i choose format- qtmovie with compression at blackmagic 8 bit.
when i use compressor and convert it to an mpeg4 the footage has issues. (The compressor will also not allow me to change the geometry setting to a “720×480 mpeg2 file” as you had said, and is locked in as 720X480 (and i am not sure how to go about changing that).)What should I set my sequence setting to, and how should i export so that i may finally get this footage to DVD. PLEASE PLEASE HELP.
Much appreciated. -
5 Replies
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Check out my response in the FCP forum.
Adam Duplay
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I guess
lower field = ODD -
Would u guys link to these other posts.
I have had the same problem and I think it’s a bug in Compressor 3.01. There are 6 extra lines in D1 footage for DVD MPEG purposes, so encoders have to take an EVEN number of lines off the top and bottom so that the field order does not change. If Compressor takes 3 off the top, 3 off the bottom, then the field order gets reversed.
My workaround has been to use BitVice on the Mac or Procoder on my PC.
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When it comes to reversing of fields, there is great freeware program Restream. It’s for PC. It can also change various flags of the mpeg stream.
Cheers,
Uku -
I have had a problem like this before and thought it was a field issue but it wasn’t……… and this could be your solution. The Blackmagic uncompressed codec is 720 x 486. You are converting it to 720 s 480 for dv and dvd. Quicktime Pro and all mpeg compressors seem to squeeze the picture and reinterlace the entire picture. YOU MUST CROP 6 LINES OFF OF THE PICTURE BEFORE YOU COMPRESS IT. You can do this in most conversion programs such as Mainconcepts,Anystream, Cleaner etc …and Compressor on the Mac. Take 2 lines off the top and 4 lines off the bottom. This totally eliminated any frame jitter and interlacing artifacts I was having going to dvd. Even when converting to Pal from Ntsc or Pal to NTSC. Now my final product is flawless…Ken
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