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20th December 2008, 20:52 | #1 | Link |
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Join Date: Jun 2005
Posts: 3
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Need help with odd combing in seemingly telecined source
I'm currently working on backing up Vanishing Point (Retail NTSC) using x264, and am having some trouble.
In some scenes it looks telecined (standard 3p, 2i pattern), in others there are frames which are more combed than others, but all have residual combing (creating a pattern of 3 slightly combed frames, 2 full interlaced). However, I'm loathe to call it hybrid content as: A. It doesn't appear fully interlaced in any scenes, B. The film was made far before the advent of digital editing (effects, etc.) I've tried IVTC and the residual combing remains (as expected), and also tried straight up deinterlacing (Yadifmod + nnedi), which just seems wrong. DGIndex log: Code:
Stream Type: MPEG2 Program Profile: main@main Frame Size: 720x480 Display Size: 720x480 Aspect Ratio: 16:9 [3] Frame Rate: 29.970030 fps Video Type: Film Frame Type: Coding Type: Colorimetry: Frame Structure: Field Order: Coded Number: Playback Number: Frame Repeats: Field Repeats: VOB ID: 2 Cell ID: 3 Bitrate: Bitrate (Avg): Bitrate (Max): Audio Stream: 80: AC3 2/0 192 Audio Stream: 81: AC3 2/0 192 Audio Stream: 82: AC3 2/0 192 Audio Stream: 83: AC3 2/0 192 Audio Stream: 84: AC3 2/0 192 Timestamp: 0:09:22 Elapsed: 0:00:00 Remain: FINISH FPS: Info: Any ideas what the combing is? Thanks. Edit: Sorry for the double post. Last edited by morca007; 21st December 2008 at 00:24. |
20th December 2008, 23:56 | #2 | Link |
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Join Date: Jan 2002
Posts: 21,901
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Strangely, your sample is bitwise identical to the sample posted in this thread:
http://forum.doom9.org/showthread.ph...69#post1225169 So I guess I will just refer you there. |
21st December 2008, 00:37 | #3 | Link |
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Join Date: Jun 2005
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Thanks, seems I've got some reading (and testing) to do.
Edit: So, as far as I gather, the blended fields originated during a bad NTSC/PAL transfer. Is there anything I can do to fix this in avisynth? Using, say, telecide(blend=true) results in combing, and a soft picture. Deinterlacing and then using SRestore to bring it to 23.976fps kills details. Last edited by morca007; 21st December 2008 at 02:44. |
21st December 2008, 16:01 | #4 | Link | |
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Join Date: Oct 2001
Location: Hawaii
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Quote:
I had my best luck with: Yadif(Mode=1,Order=1) CDeblend() BlendBob() TDecimate() You can try another and slower bobber, but as long as field-blending is involved you'll never get it to the way it would have been had the DVD production company done it right in the first place. All those diagonal lines on the cars will always be aliased. |
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Tags |
combing, interlacing, telecine |
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