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weird lines after letterboxing

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James Hark
weird lines after letterboxing
on Nov 29, 2015 at 8:23:48 pm

Hey again. So I letterboxed my footage. For some reason in this video I'm getting weird lines on the top and bottom of the letterbox. like a distortion of the image. Anyone know what this is?







heres the video uploaded and unlisted on youtube.


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John Rofrano
Re: weird lines after letterboxing
on Nov 29, 2015 at 8:35:28 pm

I don't see any distortion. How did you letterbox it? You should just change the project dimensions to the aspect ration you want and let YouTube letterbox it for you.

~jr

http://www.johnrofrano.com
http://www.vasst.com



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James Hark
Re: weird lines after letterboxing
on Nov 29, 2015 at 8:52:22 pm

oh please tell me what the dimensions would be I have been trying to figure out how to letterbox my videos properally for a while :(

I use hitfilm cinestyle and turn everything off except letterbox and i reposition with the plugin.

And the distortion is one very thin line that runs at the top of the letter box and at the bottom of the letterbox.


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John Rofrano
Re: weird lines after letterboxing
on Nov 30, 2015 at 12:06:36 am

[James Hark] "oh please tell me what the dimensions would be I have been trying to figure out how to letterbox my videos properally for a while :("
It's actually very simple math. What cinema aspect ratio do you want to use: 1.85:1? 2.39:1? What is your source footage? 1080 HD?

~jr

http://www.johnrofrano.com
http://www.vasst.com



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James Hark
Re: weird lines after letterboxing
on Nov 30, 2015 at 12:44:38 am

source footage is 1080 hd yes. i want 2.35:1 letter box. and maybe you can check my other forum i posted i got quite frustrated earlier with hitfilm and vegas :(


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John Rofrano
Re: weird lines after letterboxing
on Nov 30, 2015 at 1:06:39 pm

[James Hark] "source footage is 1080 hd yes. i want 2.35:1 letter box."
OK, so here is how the math works: 2.35:1 means that the images has a width 2.35 x wider than the height which is 1. Since your image will never be wider than 1920 you need to solve the equation for height by dividing your width by 2.35:

1920 / 2.35 = 817.02127659574468

That means the height needs to be 817.02 but there's a problem. Most codecs can only encode dimensions in multiples of 8 and 817 doesn't divide y 8 evenly (102.1275) but 816 does (816 / 8 = 102).

So you need to set your project width and height to 1920 x 816 with a Pixel Aspect Ratio of 1.0 to get a cinema aspect of 2.35:1. You might want save that as a template for future projects.

Now you can render to 1920 x 1080 and the process of rendering will letterbox your video the right way.
[James Hark] "and maybe you can check my other forum i posted i got quite frustrated earlier with hitfilm and vegas "
I don't use HitFilm so I'm sorry but I can't help you there. :(

~jr

http://www.johnrofrano.com
http://www.vasst.com



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