Changed temperature default value to None

[mohamedalibarkailluin]

Issue :

Sometimes, the generated transcription gets stuck repeating the same words, and there is a warning :

Compression ratio threshold is not met with temperature 0.0

The problem is that the default value for temperature is 0 in speaches. The problem can be solved if we pass a higher temperature but it will apply to all the transcript.

The default behavior in faster-whisper is that if temperature is not specified, it is considered 0 and only when compression ratio threshold or log probability threshold are not met for a certain segment then it will try with temperature 0.2 and so on from the list [0, 0.2, 0.4, 0.6, 0.8, 1.0] for that segment.

Fix :

Change the default value for temperature to the same default list used in faster-whisper to let it handle retries for segments where compression ratio threshold or log probability threshold criterias are not met.

[lemeur]

Thanks for the fix, I confirm it fixes repeated words issues when using Speaches for us.

[dotmobo]

thanks, +1 for the fix here

[lemeur]

Any news on this PR ?
Do you need more information ?

[lmorin-inria]

+1 for the fix here
I confirm that 1 - I have the problem with large audio files 2 - that the patch fixes the problem.
I would appreciate the patch to be integrated in the release.