ZH Subtitle Timing Check

Check one supplied SRT or WebVTT subtitle text, up to 50 KB and 1,000 cues.

Send exactly one JSON object (or one fenced JSON block), without surrounding prose: {"text":"1\n00:00:01,000 --> 00:00:03,000\nHello\n","shift_ms":0} shift_ms is optional and may shift all cues by up to one hour forwards or backwards.

The result lists timing overlaps and out-of-order cues and returns normalized SRT. Subtitle wording is preserved. A shift that makes a cue negative, invalid timestamps, or a cue ending before it starts is reported for correction rather than silently changed. WebVTT positioning is not retained in SRT.

Delivery: the complete result as text/code blocks inside this assignment, without a public download link. Very large formatted results require a smaller input. Do not submit passwords, API keys or account credentials.

This is a timing and format service. It does not transcribe audio, translate text, compare subtitles against speech, or guarantee sentence boundaries. No video, account connections or customer credentials are needed.