[FFmpeg-user] h.265 crf values corresponding with h.264

Ferdi Scholten ferdi at sttc-nlp.nl
Wed Dec 15 19:39:41 EET 2021

On 15-12-2021 18:18, Cecil Westerhof via ffmpeg-user wrote:
> When looking at:
>      https://trac.ffmpeg.org/wiki/Encode/H.265
> with h.265 the value 28 should correspond with the value 23 with
> h.264.
> Is there a (rough) table for the other values?
Well, no not really

Those figures are generic. In reality there are many things that can 
affect both quality and size.
The kind of video used as a source, the amount of visual detail, the 
preset used or other settings all have a big impact either on size or 
quality of the encode.

So what is your goal, would you want high quality, small file sizes or 
fast encoding speed? All these things you need to trade off to get to 
your optimum encoding settings. Do some trial runs with small samples to 
find out what suits your needs.

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