CRF Encoding mystery

You're partially right but you misunderstood what I said. In CRF I don't know the average bitrate beforehand, only afterwards :) which is futile should the movie be 5 MB longer than the BDR which means I have to reencode it again (another lost day).

CRF is nice because to an extent it takes away the guessing from picking an appropriate bitrate for your source. Run some test encodes and find a quality value that is transparent to your eyes, then use it. :) It's also nice because it only takes one pass, with the downside of not knowing the final output size.

Thanks for the replies guys. The thing I want to know is, is CRF 20 some good value? will it automatically give the quality for the action movies and higher bitrates and also lower bitrates for the drama type movies?

hello_hello, Thanks for the reply mate. I shall try encoding more on the CRF20 then. yes I tried a 1080p to a 720p.

I don't get it. If moving parts don't seem to have a high enough quality, why not just raise the overall bitrate/quality now anyway? Do you use "--tune animation" when encoding? Not that I have the slightest idea whether it'd have an effect on the amount of compression used for still vs moving objects as I rarely encode animation.