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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?
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Nathaniel Reichman Producer/Re-recording Mixer - New York Nathaniel Reichman | IMDB | LinkedIn |
#2
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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 |
#3
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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.
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#4
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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.
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Nathaniel Reichman Producer/Re-recording Mixer - New York Nathaniel Reichman | IMDB | LinkedIn |
#5
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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! |
#6
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Re: Video Format: Encoded Size vs. Display Size?
Quote:
Unless you are projecting super-big 36 is plenty for sound work.
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PTHDn 2024.3 (OSX13.6.5), 8x8x8, MacPro 14,8, AJA LHi, SYNC HD, all genlocked via AJA GEN10, 64GB RAM, Xilica Neutrino, Meyersound Acheron |
#7
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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
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__________________ PT Ultimate 2023.12, MacStudio M1 Ultra 64GB RAM OSX 13.1, Avid MTRX Studio, Avid S1/Dock + VideoSync 5, MacMini 3.2GHz i7 64GB RAM OSX 10.13.1 |
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