Hi, using FF Works, GUI for FFMPeg on Mac.
Having been trying out AV1 movie compression and am impressed with compression rate (using SVT-AV1) compared to the HEVC I was used working with.
But I'd like to understand the three different settings available for AV1 conversions :
-
Quality Mode
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Constant quality factor mode (CRF 20 as baseline)
-
Bitrate mode
Basically I'm converting 1920x1080 H264 recordings.
In quality mode, it doesn't matter how high i put the quality (50-100%), I'm always getting the same output size. Why ?
Upping 2. even a bit (from 20 to 23) I'm getting about a 20% increase in size but no noticeable quality difference.
In bitrate mode, going from standard high quality (199906.56 Kb/s) to very high quality (29859,84) gives me an error.
Can anyone help me wrapping my head around this ?