Go Back    Forum > Digital Video > Video Project Help > Restore, Filter, Improve Quality

LinkBack Thread Tools
05-31-2012, 07:23 PM
Belmont Belmont is offline
Free Member
Join Date: Mar 2012
Posts: 43
Thanked 3 Times in 2 Posts
Well, I was messing around with deinterlacing last night (a very dangerous thing, I know ), and I may have stumbled upon something. Using a Yadif mode and "keep bottom field" option, I managed to get rid of a static burst (from tape damage or temp. tracking error, I'm not sure) while keeping the picture mostly intact. There is still a distortion and a hue error, but the main point is that the picture remains visible and there is little static. I'm not sure how well this works on tracking errors, though.

There were two in this scene with similar errors. One was damage to the master broadcast tape (or interruption of broadcast. These did come from DirecTV SD satellite feeds recorded onto VHS), and the other was genuine tape damage. Once again, I'm using the SWAT Kats tapes (they've become my guinea pigs for rest. techniques. They have all sorts of minor, fixable errors, and they're literally right there on my hard disk), but I'd imagine this would work for any source with the same error. While deinterlacing is pretty bad for exporting to disk, inserting the frame into the video with a non-linear editor and exporting as interlaced. I'd imagine overall it'd have a bad effect on the video, but I haven't tried this yet.

Anyway, once you have the field with the least damage singled out, you can use photoshop to hide it with masking and color correction.

I'm sure I'm just repeated basically what y'all know already, but whatever I personally think this is pretty damn cool.

Attached Images
File Type: png rest2.png (345.1 KB, 5 downloads)
File Type: png RestFrame.png (361.5 KB, 4 downloads)
File Type: png DeintSettingsFor1FieldErrors.png (25.1 KB, 4 downloads)
File Type: jpg MasterTapeDamage.jpg (56.2 KB, 5 downloads)
File Type: jpg Before&After.jpg (40.8 KB, 10 downloads)
File Type: jpg Screen shot 2012-05-31 at 8.21.42 PM.jpg (43.3 KB, 3 downloads)
Reply With Quote
Someday, 12:01 PM
admin's Avatar
Ads / Sponsors
Join Date: ∞
Posts: 42
Thanks: ∞
Thanked 42 Times in 42 Posts
06-03-2012, 01:40 AM
admin's Avatar
admin admin is offline
Site Staff | Web Development
Join Date: Jul 2003
Posts: 4,330
Thanked 653 Times in 457 Posts
For something like this, you'd be better off dropping the field -- odd or even. Not Yadif or any other advanced deinterlacer. The damage caused by the deinterlacing (known as "aliasing") could be repaired by an anti-alias filter, using Avisynth, such as Santiag() or AAA(). With cartoons, the damage is more noticeable, but I find it also easier to repair. AA'ing live-action video isn't always as well processed as animation.

This can also resolve visual vertical jitter, under the right circumstances.

- Did this site help you? Then upgrade to Premium Member and show your support!
- Also: Like Us on Facebook for special DVD/Blu-ray news and deals!
Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
How to remove audio static/buzz and hiss? lordsmurf Restore, Filter, Improve Quality 6 02-11-2022 03:51 PM
Field Dominance / Field Order (Top or Bottom) deter Encode, Convert for discs 1 12-18-2011 10:35 PM
Software filters in a nutshell, denoising and deinterlacing VHS video captures guokamoli Project Planning, Workflows 8 06-17-2011 08:08 PM
How to remove black bar from top/bottom of video (widesceen in fullscreen) bdreza Edit Video, Audio 14 01-08-2011 03:21 AM
How to remove timecode from digital video? lounisproduction Restore, Filter, Improve Quality 2 08-20-2010 10:38 AM

Thread Tools

All times are GMT -5. The time now is 10:11 AM