Can someone tell me, what does Addborder do, how does it work? Or can you point me to a readme or something

//Wolfi

Avisynth manual that is on you disc, in the directory of avisynth2.52 (folder named "Docs", simple no ?

Or There

Addborder adds black borders and letterbox cuts them of, have I understand it right?

//Wolfi

No, you make a mistake :

Addborders adds borders around the picture, making the size of the picture to change (if you have a 320*240 picture and add a 8 pixels border of all four side - Addborders(8,8,8,8 ) - you will have a picture of 336*256)

Letterbox puts borders onto the picture, without changing the size of the picture (if you have a 320*240 picture and add a 8 pixels border of all four side - Letterbox(8,8,8,8 ) - you will still have a picture of 320*240)

So why do you wanna add borders around the picture to make the resolution bigger? Won't that lower the CQ and than the quality?

//Wolfi

good question.


yeah...why

You're making the actual "FILM PIXELS" area smaller. Not larger

-kwag

now is worse for me!

Phil wrote:
"Addborders adds borders around the picture,
making the size of the picture to change ..."

wolfi ask:
"So why do you wanna add borders around the
picture to make the resolution bigger? "

Kwag answer:
"You're making the actual "FILM PIXELS" area smaller. Not larger "


then i misunderstand everything!

now i need help.

Take a big breath Jorel and relax. Everything is under control

We NEVER resize a picture to 352*240 picture and add a 8 pixel border. We first do a picture of 336*224 pixels (by resizing) and THEN add the border in order to obtain the valid resolution for VCD 352*240.

Of course, that is the same thing whatever the res you use, I just give you an example.

352*240 is the picture size and 336*224 is the film area

You do this everyday is you use Moviestacker and you never notice this ?
[/code]

oh yes Phil,
and i use addborders....i did like"blind flight",
now i "see" how it works!

thanks!

If I've understand it all right... addborder deletes for example 8 pixels of the film area, and the 8 pixels film area who deletes compensates with 8 pixels blackboarders on each side (Addborders(8,8,8,8 ) ) , am I right

So why do you do this, why add 8 pixels black borders? Is it because you wont see those 8 pixels anyway when you look at the telvision?

//Wolfi

No That is Letterbox that does that !
That's what I wanted to say by "onto" the picture for letterbox (vs "around" for addborder). Perhaps my english is too poor to make you understand the difference. Kwag help me please

Yes it is ! That what is called the "TV overscan" : TV sets are setted to "eat" a part of the image on every side. So its useless to put image there and a black border will take less place to encode.

No Dialhot I think your english is great, better then mine at least I'm not done with learning english in school, 15 years old so I have a few years of english infront of me to learn...so sometimes I dont understand "hard" sentences clearerly right

And now to the point...so you can say both letterbox and addborders saves quality

//Wolfi

Yes they do !

In fact I use Letterbox only in one case : when the source size matches exactly the destination size I want. In this case, using Addborders will ask for a resizing (because, as you understood I hope, Addborders changes the size of the picture) and I prefer to avoid it.