Token-level timestamps reset at breakpoints when multi-threading

[lreardon]

My invocation of the command is as follows:

$PROJECT_ROOT/build/bin/whisper-cli -m $PROJECT_ROOT/models/ggml-$model_name.bin -f audio/$audio_name/preprocessed.wav -ojf -of outputs/$audio_name.transcribed -p X

-ojf outputs to json "full" (i.e. with more data).
X is the number of threads to use for transcription.

When X > 1, then at the file breakpoints, the token-level timestamps reset to 0. However, the phrase-level timestamps remain accurate.

A sample output is attached, where X = 4:
lin-alg-lect.transcribed.json