One word produced by :word_timestamps.
Times are absolute seconds within the input audio. probability is the
minimum per-token acoustic probability across the tokens that make up
this word (matching faster-whisper's per-word confidence reduction);
filter at e.g. probability < 0.3 to flag low-confidence words.
Scripts without spaces between words (zh, ja, th, lo, my,
yue) split per token instead, as OpenAI whisper does: each text is
one or more whole characters, and trailing punctuation such as 。 or
、 joins the word before it.