Video Wall Project

[Patrick-Hoppe]

I am working on a video project for an orchestra in which I play.  I am taking 48 different video files and arranging them into a 1920x1080 grid.  It is about 7 min 30 sec video and I am not having any trouble with the cropping, scaling, or syncing.  My concern arises when I attempt to render.  The first time I tried to render this project in Davinci Resolve it took nearly 48 hours and crashed at 98%.  After creating a comparable composition using Adobe After Effects (because it was much easier to scale and arrange 48 video files easily in AE than Premiere Pro), I imported the Composition into Premier Pro and began the render.  Currently it has been running for about an hour and a half and the estimated time has increased from 6 hours to 42 hours and its still climbing.  My hardware is not exactly a video editing station but should I expect these render times for my MSI GS65 Stealth with an i-7 9750h, RTX 2060, and 32 gigs of 2666 RAM?  I have verified that my hardware settings in Premier Pro and After Effects should support GPU accelerated rendering but looking at task manager seems to indicate that the render I am trying to accomplish does not take advantage of this.  After all, there are no effects and it is simply a 8x6 grid of 240x180 px cropped video files.  My only real educated guess on why the render is taking so long is that there are many different encodings across the 48 video files that are being "combined".  I am really just curios for some opinions more educated than mine as to why the render is taking so long, if this is normal for my hardware, and if there are some steps I can add to my project workflow to decrease this render time.

[theonly500]

What you are running into is a harddrive limitation. You are streaming 48 FHD Clips from your harddrive to your CPU each frame.

 

This will result in almost the same rendertime in Premiere/Resolve/Finalcut/whatever. There is simply no major algorithm to reduce the amount of Data read per frame.
I did something like this a couple of weeks back and ran into the same Problem.

 

If you take a look at your CPU/GPU usage it should be way down. (That is if you havn't added any colorgrading/effects to your footage).

 

I would suggest to either move the footage to a faster drive. That will decrease the render time a lot. If you are reading from a Harddisk, make sure, that you don't write to it as well. That will absolutely tank rendering times, if you are running at the drives limit of reads.

 

Or to prerender the individual files to the size you need them to and then arrange them.

Sure, when you render the Files twice you will loose some quality, but since the final resolution of a single video is 240x180 px you can probably live with that.

[Patrick-Hoppe]

3 hours ago, theonly500 said:

What you are running into is a harddrive limitation. You are streaming 48 FHD Clips from your harddrive to your CPU each frame.

 

This will result in almost the same rendertime in Premiere/Resolve/Finalcut/whatever. There is simply no major algorithm to reduce the amount of Data read per frame.
I did something like this a couple of weeks back and ran into the same Problem.

 

If you take a look at your CPU/GPU usage it should be way down. (That is if you havn't added any colorgrading/effects to your footage).

 

I would suggest to either move the footage to a faster drive. That will decrease the render time a lot. If you are reading from a Harddisk, make sure, that you don't write to it as well. That will absolutely tank rendering times, if you are running at the drives limit of reads.

 

Or to prerender the individual files to the size you need them to and then arrange them.

Sure, when you render the Files twice you will loose some quality, but since the final resolution of a single video is 240x180 px you can probably live with that.

That sounds about right. Thanks for the two cents!