FORUMS: list search recent posts

Large raster mp4s?

COW Forums : Live & Stage Events

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
Alec Miller
Large raster mp4s?
on Sep 9, 2013 at 5:54:26 pm

I'm doing some video work for a games expo and I have created content for two 2x3 2160x5760 video walls. The client asked for all the files to be in a h.264 mp4 format. However I can't seem to export out of AE or Media Encoder at those sizes, I always get an error.
I found a 4K preset that works for my 4K footage but what can I do about the video walls?

They are short clips, about 10s-15s each and will be played off of Dell T3600s equipped with dual Nvidia Quadro K5000 cards treating the 6 screens as one 2160x5760 super screen.

Is it even possible to do a h.264 format or should I tell them that's a no go and use something more accommodating to larger raster sizes?

Also if anyone can suggest a good bit rate to encode at I would appreciate it. Those Dells should be able to handle a lot but I don't have a specific number in mind.

My specs:
Mac Pro
2x2.4 GHz Quad Core Intel Xeon
20 GB 1066 Mhz DDR 3 Ram
ATI Radeon HD 5770


Return to posts index

Alec Miller
Re: Large raster mp4s?
on Sep 9, 2013 at 6:44:42 pm

Think I answered my own question with some snooping: http://en.wikipedia.org/wiki/H.264/MPEG-4_AVC#Levels
(The answer is h264 has a max size of 4,096 x 2304 incase someone stumbles on this.)


Return to posts index

Thomas Leong
Re: Large raster mp4s?
on Sep 9, 2013 at 7:39:10 pm

These references may provide some answers -
http://forums.adobe.com/thread/707230

http://en.wikipedia.org/wiki/H.264#Levels

or google for 'h264 limits'.

Think 2160x5760 is beyond the limits of h264 (particularly the vertical resolution). Your best bet may be to provide pre-split files, and use a media player that can play them back in sync. This would also ease the decoding of the videos by the Dell (if i'm not worng, initial decoding is handled by the cpu before passing over to the gpu).

Another alternative may be to scale down the rendered resolution, and let the player scale the file up to fit the 2x3.

good luck,
Thomas Leong



Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2017 CreativeCOW.net All Rights Reserved
[TOP]