What does the -1 quality when using ffmpeg profile with x265 encoder really mean quality wise compared to the regular x265 scale?
VEGAX265
All 3 comments
I think it means the default quality. Maybe it is 28. If you do an encode you can know by comparing...
But you shouldn't use FFMPEG x265 because you have in staxrip direct x265 which is better, at all levels!
ghost
on 22 Mar 2021
Quality is used for multiple settings, depending on the selection above. So maybe there is one parameter that takes -1. Using it with x265 in quality mode, -crf -1 could cause an error.
Dendraspis
on 22 Mar 2021
No : when you select -1 it DOES NOT set -crf -1
It simply doesn't set the switch -crf
So the default quality is used, and the default, in x265 is 28.
@VEGAX265 please this is common sense, when -1 is set, look at the command line below, in your screenshot, and watch how there is not switch for any quality setting. This means the encoder will use the default. For x265, the default is 28.
ghost
on 22 Mar 2021
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Most helpful comment
No : when you select -1 it DOES NOT set
-crf -1It simply doesn't set the switch -crf
So the default quality is used, and the default, in x265 is 28.
@VEGAX265 please this is common sense, when -1 is set, look at the command line below, in your screenshot, and watch how there is not switch for any quality setting. This means the encoder will use the default. For x265, the default is 28.