Do I need to specify x264 tune presets and bitrate in both passes?

[orion44]

Hi,

I have a DVD which I want to backup with x264, in two-pass encoding mode.

Do I need to specify x264 tune presets and bitrate in both passes?

Should I use slow first pass, and does it increase picture quality?

Do slower presets increase picture quality or compression, or both?

Here is my batch script:

C:
CD C:\Program Files (x86)\x264
x264.exe --tune film -I 250 -i 25 -r 4 -B 700 -p 1 --stats D:\Project\Stats.log --direct auto -o D:\Project\Video.mkv D:\Project\AviSynthScript.avs
x264.exe --tune film -I 250 -i 25 -r 4 -B 700 -p 2 --stats D:\Project\Stats.log --direct auto -o D:\Project\Video.mkv D:\Project\AviSynthScript.avs

[SassBot]

Do I need to specify x264 presets in both passes?

Yes. How else do you expect it to know which settings you want to use?

Should I use slow first pass, and does it increase picture quality?

It does, but to such a small extent that you won't notice.

Do slower presets increase picture quality or compression, or both?

Increase compression giving you similar picture quality at smaller size.

[orion44]

Thanks!

I forgot to ask one more question. I know that when you encode a movie, it is recommended to use tune film.

But if I have a movie which has a grain that I want to preserve, do I use both tune film and tune grain at the same time,
or only tune grain?

[sneaker_ger]

Only grain.

[orion44]

Thanks.