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Choose "Max Render Quality" when downconverting from 4K to 1080p?

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Duke Sweden
Choose "Max Render Quality" when downconverting from 4K to 1080p?
on Nov 21, 2016 at 10:49:02 pm

I just read a comment from Jon Doughtie on another thread where he told someone if they're converting a video from 1080p to SD they should choose Max Render Quality. Should I use that when rendering my 4K video as 1080p? Or does it make a difference? Not burning to disc, just uploading to youtube.


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Tero Ahlfors
Re: Choose "Max Render Quality" when downconverting from 4K to 1080p?
on Nov 22, 2016 at 4:56:34 am

It gives you the best scaling quality. If that's important to you/you have the time for the render time increase then use it.


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Duke Sweden
Re: Choose "Max Render Quality" when downconverting from 4K to 1080p?
on Nov 22, 2016 at 1:05:07 pm

OK, by scaling I know I'm scaling the entire image down by going from 4K to 1080p but what about on my green screen stuff, where I'm using 1920x1080 backgrounds and then scaling my green screen characters down to size. Not as important?


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Tero Ahlfors
Re: Choose "Max Render Quality" when downconverting from 4K to 1080p?
on Nov 22, 2016 at 1:23:25 pm

[Duke Sweden] "Not as important?"

I'll just slap this here again: If that's important to you/you have the time for the render time increase then use it.

If you're not seeing any difference then you probably don't need it and your final exports will be faster.


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Alan Lloyd
Re: Choose "Max Render Quality" when downconverting from 4K to 1080p?
on Nov 22, 2016 at 6:11:20 pm

The oversampling will probably give you somewhat cleaner edges.

I'd at least try an experiment with greenscreen removal at the full size then reducing to 1080 for compositing - just a hunch, I don't have anything like that in front of me at the moment.


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Jon Doughtie
Re: Choose "Max Render Quality" when downconverting from 4K to 1080p?
on Nov 25, 2016 at 6:59:32 am

Hi there Duke. Ultimately the answer is - it depends.

On some material you may observe a noticeable difference, and not so much in the case of other materials.

I will sometimes render some short chunks (10 seconds, something like that) both ways and compare.

System:
Dell Precision T7600 (x2)
Win 7 64-bit
32GB RAM
Adobe CC 2015.02 (as of 6/2016)
256GB SSD system drive
4 internal media drives RAID 5
Typically cutting short form from HD MP4 and P2 MXF.


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Duke Sweden
Re: Choose "Max Render Quality" when downconverting from 4K to 1080p?
on Nov 25, 2016 at 3:46:17 pm

Thanks, guys. With what I do, and where it ends up (youtube) I guess I really don't need the extra rendering time.


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