[HELP] which x264 profile to use in my situation?

[ssdde]

a MP4 file is about 9.5GB, without any subtitle, i only want to encode ASS subtitle embed into video, keep the highest quality as i can, and make it the same filesize 9.5GB,

so i choose x264 2-pass encoding mode, and which profile to use is best?

 
Baseline Profile、Main Profile、High Profile,  i heard about that baseline is less compression, High Profile is the most compression, so if i want best quality, is it best to choose baseline profile?

[Selur]

Profiles restrict the features that can be used during compression.
You probably want to choose "High"-profile, read https://en.wikipedia.org/wiki/Advanced_V...g#Profiles to get a better understanding of what the profiles are indented for and what features they allow.

Cu Selur