[FFmpeg-user] FFmpeg and libx264 presets and Constant Rate Factor (CRF)
shaker.doc at gmail.com
Sat Aug 7 12:23:35 EEST 2021
> On 7 Aug 2021, at 10:12, Bill Crockett <wsc4 at optusnet.com.au> wrote:
> First of all, I am not doing 2 pass encoding. I am using the CRF option.
> They say for constant quality encoding, you will save bitrate by choosing a slower preset. A slower preset will provide better compression.
> medium – default preset
> I do not care about compression or files size. But I do care about quality.
> If I choose a CRF of 20, and I use the "veryslow" preset, the quality will still be the same if I choose a CRF of 20 and use the "superfast" preset?
Yes. I think It will be the same by the documentation.
> The same with this. If I choose a CRF of 10, and I use the "veryslow" preset, the quality will still be the same if I choose a CRF of 10 and use the "superfast" preset?
> Is this correct about the quality please?
More information about the ffmpeg-user