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After Effects large projection

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Syed Iqbal
After Effects large projection
on Jun 17, 2016 at 11:08:36 pm

Guys, can this be attainable in After Effects in terms of comp size. Also what do we understand from "we would blend projectors to have 2597 pixels" in client's below requirement.

Quote
We would be looking to create something on a 5m tall by 12m wide screen. Projection would be 1080 pixels high and we would blend projectors to have 2597 pixels.
Unquote

Please assist on this. Your help would be much appreciated.

Syed


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Kalle Kannisto
Re: After Effects large projection
on Jun 18, 2016 at 6:56:19 am

Up to 8K (8192 pixels wide) is quite attainable providing your video card is up to it.

Blending projectors sounds like they will have three 1080 projectors with some overlap for a total of 2597 pixels -- that would be my guess.


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Syed Iqbal
Re: After Effects large projection
on Jun 18, 2016 at 8:06:55 am

Thanks Kalle that's what I wanted to know before even accepting the job interview. So my spec are not so hi-fi and below is some info so that you can make a rough guess if this could handle such a project or not.

Core i7 processor
16 GB ram
Nvidia Qaudro FX 1800 graphics card

Do you think it can handle it?


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Kalle Kannisto
Re: After Effects large projection
on Jun 19, 2016 at 5:50:09 am

I think the best way to find out if your video card can handle it is to make a comp that size and throw in a bunch of layers add some effects of similar kind that you expect to have in the video into it, render it out and see.


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Syed Iqbal
Re: After Effects large projection
on Jun 19, 2016 at 7:09:39 am

Kalle and Thomas Leong, I really appreciate your help. Thanks a lot and I will definitely give it a try. I have learned quite a few things on this topic with your help.


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James Paulley
Re: After Effects large projection
on Apr 17, 2018 at 6:00:20 pm

I thought AE didn't rely on the GPU very much at all? Can you give some recommended specs for a GPU?


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Thomas Leong
Re: After Effects large projection
on Jun 18, 2016 at 9:04:35 am

The way I see it, you would create a comp of 2597x1080, and output from this 3-4 files for them as follows -

1. For the first file, in Render Queue, crop the left by 677 pixels to get an output of 1920x1080 (1920+677=2597)
2. For the second file, in Render Queue, crop the right by 677 pixels to get 1920x1080.
3. Output also a full comp resolution file (2597x1080) in case their playback pc and software can do the above left/right split itself (eg. Dataton Watchout)
4. Additional option is to output a reduced resolution file without changing the screen ratio of 2.4:1 as a representation/sample of your full res file. Some software may use this as a 'proxy' of what goes to the big screen, eg. 1728x720 which maintains the screen ratio of 2.4:1.

Outputting 1 & 2 above is easy with H264, MPEG2 or other codecs since 1920x1080 is standard.
Outputting the full comp of 2597x1080 may be a problem since 2597 is not easily divisible by 4 or 16 without a remainder, as required for most codecs. You can try HAP as .mov file, in particular HAPQ at say Quality setting of 0 https://github.com/vidvox/hap-qt-codec/releases/

The maths, based on the assumption the native resolution of each output (projector) is 1920x1080 -
1. Two projectors each at 1920x1080 are required to achieve a total of 2597x1080 blended.
2. The blend is 65% or 1243 pixels, calculated as follows :
Total width of screen in pixels = (Projector Width x Number of Projectors) - Required Blend between 2 projectors
i.e. 2597 = (1920 x 2) - 1243
3. Therefore, required Comp crop left or right is 1920-1243=677 pixels.

Hope that explains it!
Thomas Leong



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Syed Iqbal
Re: After Effects large projection
on Jun 19, 2016 at 7:12:25 am

Boss, may be I will get back to you one more time seeking your help. I hope you won't mind :)


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Steve Bentley
Re: After Effects large projection
on Apr 17, 2018 at 6:14:22 pm

Its going to really depend on what the media player/playback is. Some can only handle an HD file, some can handle a 4k file. Some look after the overlap for you and some use the projectors to overlap. Some can handle huge pixel files and look after the split and overlap.
Usually the first question is can the multiple media players sync, or do they have a multi head out on their video cards. that usually determines whether you have to split up the files or the system will carve up a single larger file.
As much as we're used to generating 20k pixel wide content, I'd say about half the time (much to our disappointment) the client opts for a single HD output and just splits it and blows it up among the projectors.



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