Video Format: Encoded Size vs. Display Size?
 

I have a video from a client:

DNxHD
bit rate 100 Mbit/s
interlaced
encoded size 1440 x 1080
display size 1920 x 1080

It doesn't perform well. A little choppy, AVE reads 160% CPU usage. Converted the video with Media Encoder to one of my DNx presets to this:

DNxHD
bit rate 147 Mbit/s
progressive
encoded size 1920 x 1080
display size 1920 x 1080

And now AVE is using 80% CPU. I've run into this "encoded size" issue before. What's happening? Or is it the interlacing that's causing the AVE problem?

Re: Video Format: Encoded Size vs. Display Size?
 

To my simplistic understanding the issue is the scaling required to display the pixels correctly.
The 1920 by 1080 has a 1 to 1 pixel sizing - no display scaling.
The 1440 by 1080 has a 1 to 1.2x pixel sizing -intense display processing.

Andrew

Re: Video Format: Encoded Size vs. Display Size?
 

You're 100% right, except for the pixel aspect ratio, which is 1.33 and not 1.2. :D

Re: Video Format: Encoded Size vs. Display Size?
 

After some more testing, I found that I could run AVE all day at 40% CPU usage by going 1280 x 720p. For most programs, that looks good enough in a medium-sized post room. Size matters, scaling matters. Not sure about interlacing. I'll save that test for next time.

Re: Video Format: Encoded Size vs. Display Size?
 

1440 * 1080 is anamorphic HD from HDV, DVCProHD Format etc., its older and only sometimes used today. It was for a better backward compatibility to SD 16:9 anamorphic.
Yes, you must only change the 1440 to 1920 picel output on the new encoding and all is fine!

Re: Video Format: Encoded Size vs. Display Size?
 

Sound like you are transcoding to an extreme DNxHD bitrate. Try DNxHD36. (1920x1080 @ 36Mbit/s) very light CPU usage and looks just fine for sound work.

Unless you are projecting super-big 36 is plenty for sound work.

Re: Video Format: Encoded Size vs. Display Size?
 

+1 on Frank's suggestion.

DNxHD36 works perfectly fine and is often what picture post use for their offline cut if using Media Composer. On the current job I just get a same as source output.

Ayush