What is best quality settings (speed not important)

[eagleftw023]

Hi! I’m using faster-whisper-xxl.exe and I want maximum transcription/subtitle quality (I don’t care about speed).

This is my current command:

$env:CUDA_VISIBLE_DEVICES="0"
chcp 65001 > $null

$purfExe="faster-whisper-xxl.exe"

& $purfExe -d cuda
-l en -m large-v2
--compute_type float16 --beam_size 7
--best_of 1 --temperature 0
--temperature_increment_on_fallback 0.2 --output_format srt
--standard --batched --batch_size 6
--beep_off -o=source
"D:\Videos\myvideo.mp4"

For best accuracy, should I switch to -m large-v3 (if supported) and/or --compute_type float32?

What are the recommended values for --beam_size, --best_of, --temperature, and --temperature_increment_on_fallback when optimizing for quality?

Are there any other flags (e.g., VAD options, punctuation/diarization options, etc.) that improve subtitle quality in this build?

Does --batched affect accuracy, or only speed/VRAM?

Environment (if useful):

OS: Windows
rtx 4070

Device: CUDA GPU (can provide GPU model/VRAM if needed)

Output: .srt

Thanks!

[Purfview]

The best is whatever works best for you. IMO, these are generally the best:

Current public version:
...exe "my.mp4" -l en -m large-v2 -ct float16 --vad_method pyannote_v3 --standard

Current Pro version:
...exe "my.mp4" -l en -m large-v2 -ct float16 --vad_method pyannote_v3 --standard --ff_vocal_extract mb-roformer --realign

[kempej01-prog]

Purfview,

I am assuming that these are the best settings when you have a Nvidia gpu. I have a AMD gpu. In your opinion, what would be the best settings for CPU-only?

[Purfview]

In your opinion, what would be the best settings for CPU-only?

Same, just remove "-ct float16".

[kempej01-prog]

Thanks. I will give that a try.

So far I have to say that the Pro version is well worth the money.

I am very impressed!

[4-Dimethylamino-78-dihydroxyflavone]

Purfview, I'm curious about your general optimal diarization settings too? Any additional plans for the cutting edge of speaker identification? Your work deserves all the praise possible, folding advanced everything into executables is game changing. Thank you.

[Purfview]

Purfview, I'm curious about your general optimal diarization settings too?

I don't know, as I don't use diarization