Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.

 

Go Back   Doom9's Forum > Search Forums

Showing results 1 to 9 of 9
Search took 0.01 seconds.
Search: Posts Made By: Gavino
Forum: Newbies 30th November 2012, 11:46
Replies: 43
Views: 68,196
Posted By Gavino
@zee944: Strange how the mind works - while...

@zee944: Strange how the mind works - while thinking about something else, a relatively simple solution to your problem occurred to me...

You can use these customised wrapper functions for Crop...
Forum: Newbies 28th November 2012, 14:59
Replies: 43
Views: 68,196
Posted By Gavino
I might be able to come up with something that...

I might be able to come up with something that could help you, but before I spend more time thinking about it, are you really sure your images are so precise that you need to crop by 105 instead of...
Forum: Newbies 27th November 2012, 23:38
Replies: 43
Views: 68,196
Posted By Gavino
If it's any consolation, I don't think it's very...

If it's any consolation, I don't think it's very 'obvious'.
I had to sit down with pencil and paper and trace out where the individual chroma pixels went at each stage of the process, getting quite...
Forum: Newbies 27th November 2012, 19:32
Replies: 43
Views: 68,196
Posted By Gavino
Not exactly. The purpose of the...

Not exactly.

The purpose of the supersampling is to end up adding borders with an odd number of pixels (here 105 and 99, matching the earlier Crop). This works for the luma, thus restoring the...
Forum: Newbies 18th May 2012, 11:47
Replies: 43
Views: 68,196
Posted By Gavino
Evidence? Does VirtualDub even support YV24?

Evidence?

Does VirtualDub even support YV24?
Forum: Newbies 16th May 2012, 17:54
Replies: 43
Views: 68,196
Posted By Gavino
What do you mean by that? Which case(s) are you...

What do you mean by that?
Which case(s) are you talking about?
Certainly, conversion from RGB to YV24 (like any RGB-YUV conversion) is subject to rounding errors within 8-bit accuracy.
Forum: Newbies 9th May 2012, 11:31
Replies: 43
Views: 68,196
Posted By Gavino
The interlaced equivalent of my code in post#19...

The interlaced equivalent of my code in post#19 is:
ConvertToYV24(interlaced=true, chromaresample="point")
MergeChroma(PointResize(width, height, 0, 2))
ConvertToRGB32()
... # filtering in RGB32...
Forum: Newbies 23rd April 2012, 10:16
Replies: 43
Views: 68,196
Posted By Gavino
Since YV12<->RGB32 goes via YV24, this also gives...

Since YV12<->RGB32 goes via YV24, this also gives rise to an effective chroma shift as I described above. To avoid this, do the conversion explicitly to YV24 and shift the chroma back before the...
Forum: Newbies 22nd April 2012, 21:53
Replies: 43
Views: 68,196
Posted By Gavino
Agreed it can be lossless with the appropriate...

Agreed it can be lossless with the appropriate algorithm, but it's debatable whether Avisynth's behaviour is incorrect (rather than simply not appropriate for this purpose).

It is consistent with...
Showing results 1 to 9 of 9

 
Forum Jump

All times are GMT +1. The time now is 11:52.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.