Correct size and crop

[tominator]

Hi
I have movies in different ARs (1,78:1 2,35:1 and so on).

Correct height for 1,78:1 with 640width would be 360. My problem is that I still get small lines of letterboxing which I do not want there.

At the moment I crop the lines out but still resize to 640x360 which gives me a few pixels adjustment of from the correct AR.

Should I instead be resizing to the size I am cropping? (Say 638x356 or whatever it might be)

[Susana]

do you have a 4:3 or 16:9 screen?

* a 4:3 has an aspect ratio 1.33:1, so you'll see black bars (1.77>1.33).
* a 16:9 has an aspect ratio 1.78:1, and it should fill completely the screen.

Image aspect ratio of movies often aren't 4:3 nor 16:9, hence blacks bars are necessary. You can crop part of the image (pan&scan), but this is not a good idea.

[tominator]

I use both 16x9 and 4x3.

But if I dont crop it and the black bars show up on the left and right side the movie will look like it doesnt scale out completly which I dont want.

[tominator]

and one more thing..

sometimes certain movies have half black lines and other disturbance at the top and bottom of screen.

If I dont crop this, what do I do to get rid of it?

[CWR03]

sometimes certain movies have half black lines and other disturbance at the top and bottom of screen.

If I dont crop this, what do I do to get rid of it?
Another of "these..."

If the aspect is higher than 1.78:1, you have three choices:
Crop the left and right sides of the video until you're left with a 16:9 source;
Stretch the video horizontally so the characters appear tall and thin;
Live with it.

Edit: This is your 6th thread on the subject of cropping and/or resizing.

[Susana]

Imagine a square (the screen).

Imagine a rectangle of same width as that square. (the intended image aspect ratio of the movie).

Move the rectangle inside the square. The area outside the rectangle but inside the square will be the black bars (not a disturbance but a geometric necessity).

You can crop the rectangle, removing part of its left and right side, up to convert it in a square that fill completly the screen, but this way you lose part of the image. :o

Same analogy for a widescreen tv and aspect ratios > 1.78:1.

[tominator]

Another of "these..."

If the aspect is higher than 1.78:1, you have three choices:
Crop the left and right sides of the video until you're left with a 16:9 source;
Stretch the video horizontally so the characters appear tall and thin;
Live with it.

Edit: This is your 6th thread on the subject of cropping and/or resizing.

But if its only a few pixels the taller and thinner part wont be noticeable, right? And therefore my best option.. wouldnt you say?

[KoD]

The possible options have been presented. Now, do whatever you find suits you best.

Stop begging for a "yes, you're right, how could we not think like that before you mentioned it?" moment.

[tominator]

Sorry. Didnt mean to do that at all.

I just thought that there was a standard I should be adapting to.

[CWR03]

But if its only a few pixels the taller and thinner part wont be noticeable, right? And therefore my best option.. wouldnt you say?
If these files are for your own viewing, then whether or not the slight aspect error is noticeable is entirely dependent on your perception.

[tominator]

They are for public viewing.

[CWR03]

Then ask the "public" for whom you will be "displaying" these files.