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Quick aspect ratio question

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jonathan young
Quick aspect ratio question
on Feb 28, 2013 at 3:06:06 am

I am taking a 1920x1080 video and compressing it to 640X360 the client wants the settings to be 16:9 anamorphic when I add this in compressor it turns it into 540X360 after it compresses it looks fine but has a green vertical bar (the height of the player) on the right side of the player..

what is wrong?
thanks for everyones help


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Rafael Amador
Re: Quick aspect ratio question
on Feb 28, 2013 at 3:08:22 am

Make sure that your 640x360 is SQUARED PIXELS.
rafael


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jonathan young
Re: Quick aspect ratio question
on Feb 28, 2013 at 5:33:35 am

Ok that worked but why when I choose the 720X480 (another final output that the client wants from the 1920X1080 master)if I use the square pixel option for aspect ratio the final video comes out looking more 4:3 but when I add the 16:9 anamorphic setting to the aspect ratio it comes out looking fine. but when I add the 16:9 anamorphic setting to the aspect ratio of the 640X360 I get the video that turns into 540X360 with the green vertical bar on the right hand side of the player?
What I am trying to say is why does the 720X480 have to have a 16:9 anamorphic pixel aspect ratio to come out correct but the 640X360 have to have the square pixel aspect ratio to come out correct.

Thanks


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Nick Meyers
Re: Quick aspect ratio question
on Feb 28, 2013 at 10:35:03 am

look at the numbers

640x360 is a 16/9 ratio

720x480 is 4/3, so needs non-squre pixels



nick


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Rafael Amador
Re: Quick aspect ratio question
on Feb 28, 2013 at 12:46:32 pm

[jonathan young] "What I am trying to say is why does the 720X480 have to have a 16:9 anamorphic pixel aspect ratio to come out correct but the 640X360 have to have the square pixel aspect ratio to come out correct."
720x480 is made of NTSC PIXELS.
If you check "Anamorphic", it will be 16x9.
If you don't check Anamorphic, it will be 4x3.

Think of the pixels as tiles.
NTSC pixels, NTSC Anamorphic pixels and Squared pixels, all have different shapes/proportions.
NTSC and NTSC Anamoprphic are rectangular. Squared are squared.

[jonathan young] "when I add the 16:9 anamorphic setting to the aspect ratio of the 640X360 I get the video that turns into 540X360 with the green vertical bar on the right hand side of the player?"
If you check Squared pixels as Anamorphic, you are distorting the pixels. They won't display Squared any more.
Squared pixels are just that "Squared". No option for Anamorphic.
rafael


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Dave LaRonde
Re: Quick aspect ratio question
on Feb 28, 2013 at 3:40:50 pm

I think the client may be using the terminology incorrectly, or you may be misinterpreting it.

640x360 is a 16x9 screen aspect ratio in SQUARE pixels. The little-tiny picture is precisely the same shape as a 1920x1080 HD picture.

It is NOT Anamorphic: Anamorphic implies that you want to stretch the picture horizontally to create a wider picture. How do you do that? You make the individual pixels wider. Such a picture would then be anamorphic.

Rather than toss around terms that neither of you seem to be familiar with, you can ask the client if the picture you deliver should be the same shape as an HD picture, the wider shape of a typical Hollywood Movie (1.85:1), or the REALLY wide shape of a classic Hollywood movie like Lawrence Of Arabia (2.35:1).

Dave LaRonde
Former Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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