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Search: Posts Made By: poisondeathray
Forum: Newbies 23rd April 2012, 16:43
Replies: 43
Views: 68,195
Posted By poisondeathray
No, it's slightly worse - I would do the...

No, it's slightly worse - I would do the conversion back in avisynth . Of course you can just as easily test it yourself. (There is even a sample video above with thin red text) . Whether or not the...
Forum: Newbies 22nd April 2012, 20:19
Replies: 43
Views: 68,195
Posted By poisondeathray
But Natt was referring specifically to Y'CbCr...

But Natt was referring specifically to Y'CbCr conversions (YV12<=>YV24), not RGB<=>Y'CbCr conversions like the OP was referring to.

Y'CbCr <=> RGB conversions are lossy for other reasons beside...
Forum: Newbies 21st April 2012, 17:57
Replies: 43
Views: 68,195
Posted By poisondeathray
There was some discusion here about whether or...

There was some discusion here about whether or not "PointResize" in avisynth was true nearest neighbor
http://forum.doom9.org/showthread.php?p=1569907

On a practical level, this loss occurs, even...
Forum: Newbies 21st April 2012, 17:32
Replies: 43
Views: 68,195
Posted By poisondeathray
Well I did test these before (and the other...

Well I did test these before (and the other sampling methods), and for a YV12 source it should be:

ConvertToRGB32(chromaresample="point")
ConvertToYV12(chromaresample="point")

(and back to RGB...
Forum: Newbies 21st April 2012, 17:17
Replies: 43
Views: 68,195
Posted By poisondeathray
But you claimed it could be done without...

But you claimed it could be done without blurriness, so I'm interested in the how to do it (with any program)?
Forum: Newbies 21st April 2012, 17:10
Replies: 43
Views: 68,195
Posted By poisondeathray
Are you using ConvertToRGB(matrix="Rec601",...

Are you using ConvertToRGB(matrix="Rec601", interlaced=false, chromaresample="point") , (and back to YV12 using same thing) ?
or using some other chroma resampling method?

If you have time, here...
Forum: Newbies 21st April 2012, 16:53
Replies: 43
Views: 68,195
Posted By poisondeathray
Yes, there is still loss Have you ever tried...

Yes, there is still loss

Have you ever tried redoing a DVD menu or titles in an RGB program like photoshop, AE, video editors, ... etc? . It deteriorates noticably, edges becomes blurry, even...
Forum: Newbies 21st April 2012, 15:51
Replies: 43
Views: 68,195
Posted By poisondeathray
Yes, visibile quality loss Whether or not...

Yes, visibile quality loss

Whether or not you see it depends on many factors including the viewer and the type of content

Deterioration is more visible on things like graphics (like titles),...
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