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  #1  
  03-18-2012, 07:18 PM
 
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Alright, so I finally got around to seriously filtering. I've been filtering my own tapes, but they don't require heavy filtering because 95% of them are well-cared for first gen. recordings, and most of the second-gen tapes are in fine condition. However, I did stumble upon a fairly nasty set of Denver the Last Dinosaur episodes from a multi-gen tape that some moron had transferred using a DVD-VCR combo and peddled it around. Needless to say, the quality is below awful, and so I gave it a shot. While there wasn't much I could do with virtualdub (or even access to the original tape), I tried my best to get rid of the noise, chroma bleeding, and audio hiss using a heavily modified version of the filter-chain lordsmurf posted in the "How to Restore Unfiltered VHS Rips" thread.

I'm pretty sure I bungled it, but, well, I'll let you people be the judge of that.


Attached Files
File Type: zip filter1.mov.zip (3.86 MB, 28 views)
File Type: zip filter2.mov.zip (5.35 MB, 20 views)
File Type: vcf denver.vcf (1.8 KB, 158 views)
File Type: mpg Original2.mpg (8.59 MB, 51 views)
File Type: mpg Original1.mpg (9.16 MB, 38 views)
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  #2  
  03-19-2012, 10:54 AM
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When I get a few moments, I'll look it over.

And if needed, I'll teach you how to un-bungle it.
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  #3  
  03-23-2012, 09:10 AM
 
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Thanks, man!

I'll get around to posting screen caps in a bit.

Original #1
http://img706.imageshack.us/img706/5548/original1b.png

Name:  original1b.jpg
Views: 387
Size:  35.5 KB

Filter #1
http://img854.imageshack.us/img854/6656/filter1.jpg

Name:  filter1.jpg
Views: 325
Size:  26.2 KB

Original #2
http://img52.imageshack.us/img52/4482/original2.png

Name:  original2.jpg
Views: 330
Size:  37.1 KB

Filter #2
http://img694.imageshack.us/img694/3989/filter2n.jpg

Name:  filter2n.jpg
Views: 921
Size:  28.7 KB

I believe I overdid the filtering process, but I'm a newbie. You fellas be the judge on that. The size of the bars on the side changes throughout the tape, so I only cropped a little from each side. Details were lost due to the hefty noise filtering (look for the floor tiles on #1), but to be fair, they were hardly there in the original. I did use a sharpening filter in an attempt to counteract the detail loss, though. I also shifted the chroma a bit to reduce the bleeding, but in some spots it moved the bleeding to other areas



Last edited by Uncle Chuck; 03-23-2012 at 09:25 AM.
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  #4  
  03-26-2012, 04:24 AM
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Be sure to attach images to threads -- don't use those "image hosting" services here.
More info: http://www.tvpreservation.com/forum/...ges-files.html

Yes, there's a good deal of quality loss because you've overdone it some.

Can you share which filters you've used? (And settings therein.)
- If Avisynth, share the .avs file.
- If VirtualDub, share the .vcf file. (I do see once attached in the first post. Same one for both clips?)

I actually think you've done some major interlacing damage, too.
And cropped instead of matte.

When one of my main video systems is open, I'll give this a whirl and share my method with you.
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  #5  
  03-26-2012, 03:25 PM
 
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I really do appreciate the feedback, LS. The .vcf should be in the first post.

Be prepared for a very long list, ladies and gents. I used the same filter chain for both clips, as they came from the same episode.
*FlaXen VHS (-7, -7)
*Field Bob (up/down)
*DotCrawl Comb Filter (Trellis correlation, Precise 4-way 7-tap w/ Saturation [MMX]
*Dynamic Noise Reduction MMX (18)
*Static Noise Reduction (18, interlaced)
*MSU Deblocking 2.2 (default settings)
*Null Transform (x1-2, Y2-10, X2-10)
*Sharpen (12)
*Chroma Noise Reduction (U-24.55 normal, V-25.45 wide)
*Resize (resize to 640x480)

I think my problem was trying to compensate for ALL the errors with just software (the off-the-charts chroma filtering, extreme noise reduction, etc.).

Also, stupid questions, but how do I avoid interlacing damage and how do I matte instead of crop? I can never get the deinterlacing part right when I'm exporting the .avi for computer viewing (for viewing on the TV, I always keep it interlaced).
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  #6  
  03-26-2012, 07:17 PM
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I have this whole series in super high quality.
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  #7  
  03-29-2012, 03:49 PM
 
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So, any tips? I'd like to know precisely what I'm doing wrong.
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