How to desqueeze anamorphic video with custom aspect ratio?

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Eugenia Loli

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How to desqueeze anamorphic video with custom aspect ratio?

PostTue Aug 04, 2020 2:33 am

I have 1.33x anamorphic footage. I would like to desqueeze it by 1.30x instead, in order to make it appear slightly more vertically stretched. How do I do that? The Clip Attributes dialog doesn't let me use custom aspect ratios.
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Peter Cave

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Re: How to desqueeze anamorphic video with custom aspect rat

PostTue Aug 04, 2020 6:38 am

The only thing I can come up with is to create a timeline from all your source clips and use the inspector to create the aspect required on the first clip and then copy and paste the attributes to the rest of the clips. You can then select all clips on the timeline and drag to a new bin. Now you can use this new bin of clips to edit with and the attributes will be preserved. I like this workflow because all inspector attributes including OFX effects are carried with the new clip instance when you drag the clip from the timeline to the new bin!
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Jim Simon

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Re: How to desqueeze anamorphic video with custom aspect rat

PostTue Aug 04, 2020 3:36 pm

My idea is to use the normal desqueeze and achieve the desired result with an effect. (Change zoom for only one dimension.)
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olivier ferrand

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Re: How to desqueeze anamorphic video with custom aspect rat

PostWed Dec 30, 2020 8:57 pm

we need more presets regarding aspect ratios:

i'm in a situation where neither 1.8:1 nor 2:1 look right: i believe 1.9:1 would hit the right spot, as an example. i have much more flexibility using avid mc 2020.12...

please...
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Jim Simon

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Re: How to desqueeze anamorphic video with custom aspect rat

PostThu Dec 31, 2020 2:42 pm

There is a dedicated forum for Feature Requests, Oliver.

viewforum.php?f=33

Best practice is to search first, to see if someone already asked. If not, post one idea per thread with a very brief description of the idea in the thread's title.
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Re: How to desqueeze anamorphic video with custom aspect rat

PostThu Dec 31, 2020 4:26 pm

It depends on your use case. If you want to do this for a couple of clips already in your "normal" timeline, Jim's idea of de-linking X from Y scale and scaling Y is fast and lets you choose the amount of stretch as a percentage, live in the viewer. If you'll be using a bin of clips this way, mixing them with other "normal" clips then Peter's suggestion gives you a lot of flexibility.

If you want an entire timeline to look this way and all of your clips are the same you could create a timeline with a custom resolution with a greater Y height, and select that clips should be scaled to the four corners. (I believe you can only do this at timeline creation.) This will distort every clip, and you can then crop the timeline down to your standard resolution. This won't give you the flexibility to pan-n-scan each clip to control the part that shows, though: everything will be centered and cropped.
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Howard Roll

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Re: How to desqueeze anamorphic video with custom aspect rat

PostThu Dec 31, 2020 4:56 pm

Multi select the clips to change then access the Inspector from within the Media page, no need for additional timelines or bins. The prior comments pre-date R17 and this feature.

Good Luck

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wfolta

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Re: How to desqueeze anamorphic video with custom aspect rat

PostThu Dec 31, 2020 7:02 pm

Though to be honest, she doesn't indicate that she's using v17, which is still in beta.

As you point out, v17's Inspector in in the Media page is so simple that it's as easy to apply to one clip as to dozens.
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Re: How to desqueeze anamorphic video with custom aspect rat

PostThu Dec 31, 2020 7:27 pm

thanks everyone for your comments and advices, sounds very good.
still on 16 here, but i will upgrade as soon as the beta stage is over...

happy new year!!!
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Re: How to desqueeze anamorphic video with custom aspect rat

PostThu Dec 31, 2020 7:30 pm

Going all the way back to the OP, to get a 1.3x desqueeze, the Y axis should be set to 0.76923 (=1/1.3).
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Re: How to desqueeze anamorphic video with custom aspect rat

PostThu Dec 31, 2020 9:12 pm

olivier ferrand wrote:thanks everyone for your comments and advices, sounds very good.
still on 16 here, but i will upgrade as soon as the beta stage is over...

happy new year!!!


I don't think this is Feature request, it can be done already.

The most important issue is where do you want to do the scale.

If (like I suspect) you want to do it in the media page, there is a way that we use here that will leave all the other edit/input preset untouched.

1) get a clip you like by itself in teh timeline
2) go to the color page
3) input sizing
4) do the scale you wish
5) —> in the drop down menu in the input sizing (the three dot menu) there is an option called [Save a New Preset] —> save and close
6) apply that preset in teh clip attribute in the media page.


Say HURRAY!!!!

(The save preset has a little bug, if it does not work the first time, try again...)
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olivier ferrand

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Re: How to desqueeze anamorphic video with custom aspect rat

PostFri Jan 01, 2021 7:43 pm

hi walter,

i tried your recipe in the media page, and it works very well, batch processing included.
thank you very much! :)
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Re: How to desqueeze anamorphic video with custom aspect rat

PostFri Jan 01, 2021 9:32 pm

olivier ferrand wrote:hi walter,

i tried your recipe in the media page, and it works very well, batch processing included.
thank you very much! :)


You're welcome, we use it times to times..
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Re: How to desqueeze anamorphic video with custom aspect rat

PostFri Jan 01, 2021 11:19 pm

rick.lang wrote:Going all the way back to the OP, to get a 1.3x desqueeze, the Y axis should be set to 0.76923 (=1/1.3).


There is actually a 1.3x anamorphic desqueeze option under Pixel Aspect Ratio in Clip Attributes which saves the hassle of doing the manual math
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waltervolpatto

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Re: How to desqueeze anamorphic video with custom aspect rat

PostFri Jan 01, 2021 11:50 pm

RikshaDriver wrote:
rick.lang wrote:Going all the way back to the OP, to get a 1.3x desqueeze, the Y axis should be set to 0.76923 (=1/1.3).


There is actually a 1.3x anamorphic desqueeze option under Pixel Aspect Ratio in Clip Attributes which saves the hassle of doing the manual math


The OP need a different value
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Re: How to desqueeze anamorphic video with custom aspect rat

PostSat Jan 02, 2021 12:00 am

Yep. They were desqueezing 1.33x and wanted 1.3x instead.

The PAR setting in Resolve is in fact 1.3x and not 1.33x - I've actually tested and confirmed this.
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Re: How to desqueeze anamorphic video with custom aspect rat

PostSat Jan 02, 2021 4:40 am

RikshaDriver wrote:Yep. They were desqueezing 1.33x and wanted 1.3x instead.

The PAR setting in Resolve is in fact 1.3x and not 1.33x - I've actually tested and confirmed this.



I love the specs of your signature!!! I'm surprised you can run NT on a 386....
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Re: How to desqueeze anamorphic video with custom aspect rat

PostSat Jan 02, 2021 9:53 am

:) It's a tongue in cheek to elicit chuckles from anyone tech-savvy and over 30.

i386 is/was the Bare minimum to run NT 3.1 :)

Fun fact, the 386 processors were still in production up until '07
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Re: How to desqueeze anamorphic video with custom aspect rat

PostSat Jan 02, 2021 1:30 pm

RikshaDriver wrote:Yep. They were desqueezing 1.33x and wanted 1.3x instead.

The PAR setting in Resolve is in fact 1.3x and not 1.33x - I've actually tested and confirmed this.
True. I never went this route because I use the SLR Magic 1.33x-65 Anamorphot. That adapter requires a different squeeze factor for Near objects versus Normal distance objects. For Near objects the desqueeze is only about 1.22x (zoom Y axis about 0.82x) gradually increasing desqueeze until once you’re objects are about 5’ away then the squeeze is 1.33x. So for closeup shots I select the zoom value that looks correct.

I assumed actual anamorphic lenses don’t have this variable squeeze as they would correct for that. Would be good if anyone could confirm that anamorphic lenses use a constant squeeze regardless of focal distances.
Rick Lang

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