| What exactly does "Use Maximum Render Quality" do?
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 | What exactly does "Use Maximum Render Quality" do?
by Nick Haffie-Emslie on Jan 26, 2012 at 2:45:04 pm |
Please excuse the cross-post (posted earlier in Media Encoder forum), but I wasn't sure which place was more appropriate.
Having trouble tracking down the precise function of "Use Maximum Render Quality" - Adobe docs only say:
When this option is selected, Adobe Media Encoder renders the sequence with the greatest quality of motion. This option slows rendering substantially, and requires much available RAM. This option is not recommended for systems having the minimum RAM required.
"greatest quality of motion"?
I've heard people talk about it improving scaling (something which I've found Apple Compressor does much more smoothly than AME). Does it switch the scaling mode from nearest neighbour / point sample to bilinear or bicubic or something?
I've also heard talk of better de-interlacing.
Is it independent of the export codec? i.e., Do its actions take place before encoding (like de-interlacing and scaling would), or does it change the encoding approach of certain codecs?
Does it act on Premiere Sequences at all, for example improving subpixel transformations or something like that?
Any insight would be appreciated.
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• | | | |  | Re: What exactly does "Use Maximum Render Quality" do?
by Chris Borjis on Jan 26, 2012 at 5:14:38 pm |
I've only heard that it improves quality when scaling HD to SD for example.
In my experience AME does a better job than compressor on its highest quality setting.
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• | | | |  | Re: What exactly does "Use Maximum Render Quality" do?
by Angelo Lorenzo on Jan 26, 2012 at 11:21:13 pm |
I'll agree with Chris. It's a higher quality algorithm for rescaling and, possibly, frame blending if you're adjusting framerates.
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• | | | |  | Re: What exactly does "Use Maximum Render Quality" do?
by Gabriel Sanchez on Jan 27, 2012 at 12:11:17 am |
The Maximum Render Quality mode will maximize the quality of motion in rendered clips and sequences. So when you select this option, the video will often render moving objects more sharply. Maximum Render Quality also maintains sharp detail when scaling from large formats to smaller formats, or from high-definition to standard-definition formats. For the highest quality exports you should always use the Maximum Render Quality mode.
http://www.studio1productions.com/Articles/PremiereCS5.htm
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• | | | |  | Re: What exactly does "Use Maximum Render Quality" do?
by Guilherme Maranhão on Feb 20, 2012 at 3:09:42 pm |
Hi,
I have a mac Os 10.7.2 and exported my sequence without "Use Maximum Render Quality" and I liked the result.
My sequence setting is AVCHD 1960x1080p. The video exported format chosen was H.264 (mp4) with 30fps, which generated a 24.5 Gb file.
My video is divided between still images and videos and its duration is 1h45m.
The estimated time to export using "Maximum Render Quality" is 30 hours!!
For this format (H.264) and on mac 10.7.2, do you think I will have any real gain with the "Use Maximum Render Quality"?
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• | | | | | Re: What exactly does "Use Maximum Render Quality" do?
by Nick Haffie-Emslie on Jan 27, 2012 at 4:05:21 pm |
Thanks guys.
Chris - Good point. I should say Compressor scales better than Media Encoder on default settings; when Maximum Render Quality is on in Media Encoder, they seem pretty comparable.
Angelo - Based on my tests, I haven't been able to detect any differences with in-betweening frames during speed/framerate changes (not yet anyway). It doesn't, for example, appear to use the pixel flow algorithm that After Effects uses on its highest setting (where you're not blending frames based on opacity, but actually trying to analyze and map where objects in the frame are moving).
Gabriel - I'm still a little confused by what a "moving object" is here. Are we talking about titles and/or other things in Premiere that the software knows is an object? You mentioned it renders them "more sharply" - how does this relate to motion blur? Does it only come into play when changing the frame rate?
Not trying to be nitpicky, just trying to get a sense of exactly what's happening. I don't want to waste the significant additional render time in situations where it doesn't add anything (e.g. if I'm scaling but not time remapping; if I'm not scaling or time remapping but simply transcoding; etc.)
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• | | | | | Re: What exactly does "Use Maximum Render Quality" do?
by Chris Borjis on Jan 27, 2012 at 5:18:58 pm |
[Nick Haffie-Emslie] "Chris - Good point. I should say Compressor scales better than Media Encoder on default settings; when Maximum Render Quality is on in Media Encoder, they seem pretty comparable."
It's true compressor can do a good job. Where AME does better in particular is very challenging
HD to SD down res. In particular a 720P video with hard angles (roof lines or a pyramid) in
compressor you will see some sort of aliasing, with AME it's smooth.
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• | | | | | Re: What exactly does "Use Maximum Render Quality" do?
by Nick Haffie-Emslie on Jan 29, 2012 at 9:22:25 pm |
Thanks Karl - that's a great article!
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• | | | | | Re: What exactly does "Use Maximum Render Quality" do?
by Chris Borjis on Jan 30, 2012 at 5:33:19 pm |
thanks for the article Karl.
I was just thinking the other day how awesomely more fast media encoder
would be if it supported CUDA.
A video that takes 45 min to encode could be done in roughly 8 min if it was CUDA accelerated.
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