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How do I split an mp4 into 4 .mp4sub files?
I am currently trying to find a way to play a 4k HD video, and apparently the device requires the full resolution mp4 to be cut into 4 quarters (top left/top right/bottom left/bottom right) and somehow saved so the first one is a ‘master’ mp4 of sorts, with the other 3 files having a .mp4sub extension on them.
I have looked all over and can’t find a solution to this. Any help would be greatly appreciated!
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3 Replies
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I haven’t heard of this before — what is the playback device?
Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog – What I’m thinking when my workstation’s thinking
Creative Cow Forum Host: Live & Stage Events -
First time I’d heard of it as well – this is about all I could find. Looks as if it’s being used as a clever way to turn 4 HD quadrants into “4K”:
https://en.wikipedia.org/wiki/2160p
Joe Bourke
Owner/Creative Director
Bourke Media
http://www.bourkemedia.com -
[Joseph W. Bourke] “First time I’d heard of it as well – this is about all I could find. Looks as if it’s being used as a clever way to turn 4 HD quadrants into “4K”:”
I’ve delivered UHD before, but I’ve not heard of the .mp4sub delivery format. I’m guessing it’s a player-specific workflow, and I’m curious what the actual playback system is.
Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog – What I’m thinking when my workstation’s thinking
Creative Cow Forum Host: Live & Stage Events
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