Subtitle Shift MCP tool
MCP
findutils:subtitle_shift Shift every cue in a SubRip (.srt) or WebVTT (.vtt) caption file by one fixed offset, so a track that runs early or late lines up with the audio again. A positive offset delays the captions (they appear later); a negative one advances them. The output keeps the input format, cue text, order and WebVTT cue settings. A cue whose start would go below zero is held at zero and counted; a cue that would end before zero is dropped and counted. Timing only: nothing is stretched, translated or edited.
Arguments
application/json-
input
string required
Caption file contents, either SubRip or WebVTT.
-
offset_ms
integer required
Milliseconds to add to every timestamp. Positive shows captions later, negative earlier. 1500 means one and a half seconds later.
Example arguments
Verified{
"input": "1\n00:00:10,000 --> 00:00:12,000\nTen seconds in.\n",
"offset_ms": 1500
}