Posted: 11/1/2011 1:18 AM
Post subject: TASBlend issue
Quote
Brandon
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Editor, Player (191)
Joined: 11/21/2010
Posts: 914
Location: Tennessee
See this video and watch at around 13:19. It takes a 2-on-2-off effect and blends it in the worst way possible: it's blurry AND the effect is removed. Is this normal?
All the best, Brandon Evans
Posted: 11/1/2011 9:24 PM
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FractalFusion
Editor, Expert player (2073)
Joined: 6/15/2005
Posts: 3282
Glitchy TAS of 2013 Gameboy TAS of 2013 PSX TASer of 2010 
...|1 |0 |0 |1 |1 |0 |0 |1 |1 |0 |0 |1 |...
...|66|33|33|66|66|33|33|66|66|33|33|66|...
...| 66  | 66  | 66  | 66  | 66  | 66  |...
1 is image A, 0 is image B. We take 66% of the first frame and 33% of the second (note the alignment above). The result is that 66% of the resulting image is image A over all these frames. Unfortunately, this is normal up to 50% probability.
Posted: 11/2/2011 12:20 AM
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Brandon
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Editor, Player (191)
Joined: 11/21/2010
Posts: 914
Location: Tennessee
FractalFusion wrote:
...|1 |0 |0 |1 |1 |0 |0 |1 |1 |0 |0 |1 |...
...|66|33|33|66|66|33|33|66|66|33|33|66|...
...| 66  | 66  | 66  | 66  | 66  | 66  |...
1 is image A, 0 is image B. We take 66% of the first frame and 33% of the second (note the alignment above). The result is that 66% of the resulting image is image A over all these frames. Unfortunately, this is normal up to 50% probability.
Sadly, 2 of the 3 Bionic Commando encodes I did yesterday had this problem. Is there any workaround for this? Surely there's a way to catch these instances and prevent the issue from occurring.
All the best, Brandon Evans
Posted: 11/2/2011 12:23 AM
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Dacicus
Editor, Player (69)
Joined: 6/22/2005
Posts: 1050
Just don't blend those parts of the movie...
Current Projects: TAS: Wizards & Warriors III.
Posted: 11/2/2011 12:33 AM
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Brandon
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Editor, Player (191)
Joined: 11/21/2010
Posts: 914
Location: Tennessee
Dacicus wrote:
Just don't blend those parts of the movie...
That's the non-lazy answer. In all seriousness, I figure that there's way to tweak the algorithm from preventing these cases from happening. I should be more conscious of when / where I'm blending, but that doesn't mean the algorithm can't be better.
All the best, Brandon Evans
Posted: 11/2/2011 12:37 AM
Quote
Lex
Joined: 6/25/2007
Posts: 732
Location: Vancouver, British Columbia, Canada
There were superior alternatives posted in the other thread. Why not ditch TASblend and use one of those?
Posted: 11/2/2011 1:40 AM
Quote
nanogyth
Player (66)
Joined: 4/21/2011
Posts: 232
Brandon wrote:
In all seriousness, I figure that there's way to tweak the algorithm from preventing these cases from happening.
There are MANY ways to tweak the algorithm, but no one solution will give best results for all scenes on all sources.
Posted: 11/12/2011 8:56 PM
Post subject: Re: TASBlend issue
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creaothceann
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Editor
Joined: 4/7/2005
Posts: 1874
Location: Germany
Brandon wrote:
2-on-2-off effect
Sounds ideal for frame-dropping: 
AVISource("video.avi")

drop = ChangeFPS(FrameRate / 2)
TASBlend

Replace(  500,   999, drop)
Replace( 2000,  2999, drop)
Replace(70000, 71999, drop)
...
(functions)