Page 1 of 1

Incredibly Slow Performance on macOS 13.2

Posted: Mon Jan 30, 2023 4:48 am
by southerndoc
Description of problem or question:

When encoding H.265 (or any other format), I'm getting only 1-2 and sometimes <1 fps using a Mac Studio M1 Max with 64GB of memory. I can use VideoToolbox, but the quality is much worse.


HandBrake version (e.g., 1.0.0):

1.6.1


Operating system and version (e.g., Ubuntu 16.04 LTS, macOS 10.13 High Sierra, Windows 10 Creators Update):

macOS 13.2

Re: Incredibly Slow Performance on macOS 13.2

Posted: Mon Jan 30, 2023 8:39 am
by Ritsuka
Please post the activity logs of your encodes.

Re: Incredibly Slow Performance on macOS 13.2

Posted: Mon Jan 30, 2023 9:40 am
by mduell
Some of the encoders are indeed quite slow on Apple Silicon, like AV1.

Re: Incredibly Slow Performance on macOS 13.2

Posted: Mon Jan 30, 2023 2:09 pm
by southerndoc
I'll post after the next encode.

Out of curiosity, the VideoToolbox has an option for regular H.265 and H.265 10-bit. What is the bit of regular H.265? In other words, would H.265 10-bit offer higher quality? I set the CQ of VideoToolbox to 75 and it appears much higher quality than the default of 20 (?) I believe it is.

Re: Incredibly Slow Performance on macOS 13.2

Posted: Mon Jan 30, 2023 2:49 pm
by southerndoc
I was able to get better results by moving the encoder options to medium (it was on very slow before).

Is there a way to automatically select all subtitle/CC tracks and NOT have it default to "burned in" checked?

Re: Incredibly Slow Performance on macOS 13.2

Posted: Tue Jan 31, 2023 4:01 pm
by mduell
Default is 8 bit. Marginally better banding handling when it's a problem, incredibly marginally better compression efficiency maybe. The quality scales are different between the different encoders. Yes configure the subtitle defaults the way you want them, provide subs compatible with your choice of output container, and don't choose burned in.