textsub: a bug?

[Sigmatador]

well if i use a script like this:
Avisource("raw.avi").textsub("mysub.ssa")
here's a screenshot:
http://sigmatador.free.fr/Test/1.png

It's difficult to notice, but you can see a "squarre" around the subtitle, specially on the red colours.

If i put many textsub in the script to increase the problem i get this:
http://sigmatador.free.fr/Test/2.png

well this time it's easily noticiable ^^

oki when you normally use textsub it's hard to see it (but in fullscreen and specilly on red colors it's not that hard) but i wonder if its possile to correct this bug ^^ since i know it, my eyes can't avoid it ;)

[mf]

You mean chroma subsampling artifacts (http://forum.doom9.org/showthread.php?s=&threadid=38304&highlight=red+dark+orange) ? It's part of YV12. ConvertToRGB32() solves it, but only for watching, cause when you encode to XviD/DivX it'll convert to YV12 again and you'll get the blocks again :D.

[Zarxrax]

No, He's talking about that gray box that encompasses the subtitles. That does seem really weird, and it could possibly be having an adverse effect on the compressability.

[mf]

Originally posted by Zarxrax
No, He's talking about that gray box that encompasses the subtitles. That does seem really weird, and it could possibly be having an adverse effect on the compressability.
Hmmm. I saw the grey box, but I thought it was intended or something.

[K-Dash]

It seems like Alpha Leveled Opaque Box was added by mistake. That is anoying, what vsfilter ver are u using anyway?

[Sigmatador]

"It seems like Alpha Leveled Opaque Box was added by mistake."
right, i could be this.

i got this problem with every version of vsfilter, i asked some fansubber to test it, and they got the same problem.

just put many textsub("file.ssa") in your script, this will add the wrong alpha box and increase the problem, so you can see it.
But i'm sure, with only one textsub(), on the red colour with fullscreen it's really anoying.

i hope it's easy to fix ^^


edit:
"just put many textsub("file.ssa")"
i mean that:
Avisource("raw.avi").textsub("mysub.ssa").textsub("mysub.ssa").textsub("mysub.ssa").textsub("mysub.ssa").textsub("mysub.ssa").textsub("mysub.ssa") etc.. ^^

[mf]

Actually it looks like textsub is taking the small rectangle where to put the subs, and converts it to RGB and back.

[Wilbert]

I hope that Gabest is reading this :) If not you should contact him ...

[Sigmatador]

Originally posted by Wilbert
I hope that Gabest is reading this :) If not you should contact him ...

i did this a month ago, so i guess gabest doesn't read his pm, so i post it here with the hope that this time he will read it ^^

[Le Furet]

Your sub says "Tout le monde a l'air bien de s'amuser".

That's not french. The right sentence is :

"Tout le monde a l'air de bien s'amuser".

Master Capello :D

[d'Oursse]

:D :D Hopefully, you are also here to correct our mistakes ;) :D
don't forget to mp me your articles :)

[Sigmatador]

LOL, this *bug* is old and has been corrected a long time ago :D


gabest where are you ???

[mf]

Originally posted by Sigmatador
gabest where are you ???
Could you test it in RGB colorspace?

[Sigmatador]

Originally posted by mf
Could you test it in RGB colorspace?

already done, same problem :(

i'll test from vdub

[mf]

Originally posted by Sigmatador
already done, same problem :(

i'll test from vdub
Hm, so it doesn't have to do with YV12->RGB->YV12 conversion. Strange.

[Sigmatador]

bug with vdubmod too :-(

does someone have gabest phone? :D

[Kurtnoise]

Heya !!

Originally posted by Sigmatador
does someone have gabest phone? :D

I don't have Gabest phone number, but just another idea : thank him for his great player in MPC thread and slip this problem too.....;)


PS: French touch powaaaa !!!

[Manao]

Already done :D

[Sigmatador]

LOL this thread turn into a frog invasion

anyway, about the alpha channel opaque box (used for shadow i guess), is it hopeless ?

[JediNight]

Usually don't dig up old threads, but figured this was the best way to find out if this bug has been fixed at all? Was told not to use VSFilter on my current project bc of it, but if its fixed I'd like to save the 30% encoding speed for not converting colorspace.

[Zarxrax]

I personally don't think it's a big deal. I've been using this filter forever, and never noticed it. No one that watches my encodes has ever pointed it out to me either. For that matter, maybe the bug *is* fixed, which is the reason I don't notice it... who knows.