Question about addborders

[FuPP]

I get something that seems "strange" to me when using addborders; I get a brighter pixel line close to the border. It is even brighter using converttoyuy2() a the end of the script.

1/ Is this brighter line normal? 2/ Why do I get a different result using converttoyuy2() ?

Regards,
FuPP

Using avs 2.5 latest build (04/04)

My script :

LoadPlugin("C:\video\avsfilters\yv12\MPEG2Dec3.dll")
mpeg2source("F:\tests\vts_01.d2v",cpu=0,idct=2)
Crop(26,76,668,424)
BicubicResize(448,320,0,0.5)
AddBorders(16,128,16,128)
converttoyuy2()

See attachment for pictures...

[FuPP]

Anyone ? Shodan, maybe ?

FuPP.

[sh0dan]

Seems like one chroma line isn't being bitblitted properly, if it the bottom you are thinking of.

Edit: It was the top. ;)

[FuPP]

Originally posted by sh0dan
Seems like one chroma line isn't being bitblitted properly, if it the bottom you are thinking of.

Edit: It was the top. ;)

It is visible on the left too.

Regards,
FuPP

[FuPP]

Originally posted by sh0dan
Seems like one chroma line isn't being bitblitted properly

Sorry to ask you that Shodan, but after you posted that answer, I had understood it was a bug (these lines are present on all my encodes). Could you confirm and, if so, tell me if anything has been planned ?

In fact, I think that these line can probably (slightly ?) affect compressibility...

Thanks a lot

Regards,
FuPP

[sh0dan]

After I posted here, I put up a bug report (http://sourceforge.net/tracker/?atid=482673&group_id=57023&func=browse) to remind myself of checking this, when I got the time!

It seems like a bug, but I need to carefully check each calculation. If there is missing a chroma line, it should be fixed.

Thinking more of it - letterbox should probably always "round up", when doing chroma. Chroma values in no luma is after all less visible than one line of luma with no chroma.

(Sorry if the last part doesn't make any sense) ;)

[FuPP]

Originally posted by sh0dan
Thinking more of it - letterbox should probably always "round up", when doing chroma. Chroma values in no luma is after all less visible than one line of luma with no chroma.

It makes sense to me, except that I'm not speaking about Letterbox but Addborders ;)

Maybe the code is shared between both filters...

Thx Shodan,
FuPP.