Auto Zones Options

[Razorholt]

Hi all -

I'm using 2pass mode because I care about the final size. Now, I'm currently setting up zones in order to adjust the encoding. Depending on frames complexity I give more or less bitrates - i.e. black pictures will get 10%, medium size frames will get 60% to 70%, etc... I do the whole job visually.

It's a very painful job, as you can imagine, but I wonder if that can be done automatically. Would it be "risky" to adjust birates based on frames size/complexity in 2pass mode?

Just to be more precised I think it would be better to adjust series of frames instead of single ones.

Maybe this is what CRF does - I don't know - but I would like to keep using 2pass and get the job done faster :)

Thanks for your input.

- Dan


P.S: Can avisynth do the job?

[Ranguvar]

2-pass and CRF both take what you're doing into account by themselves :)

[Razorholt]

yes, but I would like to somehow "adjust" it

[Razorholt]

Does zones option with WEIGHT work for anybody?

[Dark Shikari]

This is exactly what x264 already does; you can adjust the strength of its current effect by changing AQ strength and qcomp.

Trying to second-guess x264 just results in worse encoding.

[Razorholt]

Oh, I see. So the more I increase qcomp the more I compress the video? Is it overal compression of specific type of frames or what? I already tried and adjusted AQ Strength but I found the default settings to be optimal (for me).

[Dark Shikari]

Oh, I see. So the more I increase qcomp the more I compress the video? Is it overal compression of specific type of frames or what? I already tried and adjusted AQ Strength but I found the default settings to be optimal (for me).AQ strength naturally weights qcomp upwards (because they do, in part, the same thing). However, lower qcomp == fewer bits towards complex frames and more bits towards simpler frames.

[Razorholt]

Got it! Thanks DS.

- Dan