YV12 cropping question (Not in FAQ)

[Daijoubu]

The source is 720x480
Why does this:

Crop(8,106,-6,-102) or Crop(8,106,706,272)
LanczosResize(640,278)

Miss 2 pixels on the right border?

While this works:

Crop(8,106,-6,-102)
LanczosResize(640,272)

And this:
LanczosResize(640,278,8,106,706,272)

Took me some times to figure out how to fix it but I still don't understand why it's happening...Avisynth gurus? :D

Edit: Uploaded image didn't work, here's it:

http://ptprophecy.com/daij/avisynth.jpg

[Kintaro]

cant reproduce that problem here, works fine.
that height=278 was a typo I suppose? why would you use a non mod4 height anyways... sure you didnt use a -4 crop in the same manner? :p

one of the best musicvid's ever btw :)

[Daijoubu]

No no, the AR of this is 4:3

(Original) 720x480 -> 720x540
(Cropped) 706x272 -> 706x306 (272 * (540 / 480))

306 / 706 = 0.4334
640 * 0.4334 = 277.4

640x278 is pretty close :p

How do you know it's Sakura Drops? :D
What's wrong with height non mod4?

Docs says In width mod-2, height mod-2 (progressive)/mod-4 (interlaced)

DGIndex reports interlaced NTSC 29.97 MPEG2 but I don't see any combing effects and all the deinterlacers did more harm than good on the video quality

[IanB]

Daijoubu,

What are you viewing the output of the script with? Many apps, like VirtualDub*, use either DivX or Xvid codecs to convert YV12 to RGB for display and both get it wrong (differently).

For viewing/testing append a ConvertToRGB() to the end of your script, this will provide an accurate display of your script output.

IanB

[Daijoubu]

Using VDubMod

DGIndex+DGDecode's MPEG2Source followed by the lines I posted

[Wilbert]

Did you see it also when


For viewing/testing append a ConvertToRGB() to the end of your script, this will provide an accurate display of your script output.

Btw, what avs version do you use?

[Daijoubu]

Just tried with ConvertToRGB(), same thing
The 2 pixels on the right border are missing