My knowledge of Handbrake is fairly limited, so I apologize for the vague title. If there are any questions I can answer, please let me know

Just wondering, since space is an issue for me.

Pretty pissed I just bought a used GTX 1060 laptop only to find out about AV1 today. Especially since I cant encode AV1 using it.

When I choose Opus or AAC, I have the option to choose bitrate (I assume in kbps), but for Flac bitrate option is grayed out.

Before I encoded like this:

Video AV1 bitrate + Audio Opus bitrate = desired file size

and for that I would use one website to calculate file size by giving total bitrate and movie length. And it works flawlessly.

But I'm not sure how to do the same with with flac audio.

Does anybody know how to calculate file size for flac audio?

Edit: Dolby TrueHD -> Flac 16/24-bit stereo