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Fix timestamps and strip extraneous whitespace in WebVTT output (#219)

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* Use two-digit hours in WebVTT timestamps

Per the WebVTT specification [0]:

> A WebVTT timestamp consists of the following components, in the given
> order:
>
> 1. Optionally (required if hours is non-zero):
>   1. Two or more ASCII digits, representing the hours as a base ten
>      integer.
>   2. A U+003A COLON character (:)

YouTube won’t accept timestamps containing single-digit hours.

[0] https://www.w3.org/TR/webvtt1/#webvtt-timestamp

* Strip segment text in WebVTT output

We already do this for plain text and SubRip output, so we should do it
for WebVTT too.
This commit is contained in:
Tom Stuart 2022-10-03 22:51:07 +01:00 committed by GitHub
parent 0b1ba3d46e
commit 02b74308ff
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1 changed files with 2 additions and 2 deletions
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4
whisper/utils.py
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@ -40,7 +40,7 @@ def format_timestamp(seconds: float, always_include_hours: bool = False, decimal
seconds = milliseconds // 1_000
milliseconds -= seconds * 1_000
hours_marker = f"{hours}:" if always_include_hours or hours > 0 else ""
hours_marker = f"{hours:02d}:" if always_include_hours or hours > 0 else ""
return f"{hours_marker}{minutes:02d}:{seconds:02d}{decimal_marker}{milliseconds:03d}"
@ -54,7 +54,7 @@ def write_vtt(transcript: Iterator[dict], file: TextIO):
for segment in transcript:
print(
f"{format_timestamp(segment['start'])} --> {format_timestamp(segment['end'])}\n"
f"{segment['text'].replace('-->', '->')}\n",
f"{segment['text'].strip().replace('-->', '->')}\n",
file=file,
flush=True,
)