I'm searching for a command line tool that can shift the timing of a subtitle file (*.srt, *.ass).
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Eighteen years ago I had written a perl script to do this on .sub and .srt files. If you are competent in perl you can modify it for .ass files too: kadifeli.com/fedon/hint.php?perl_stconv– FedKadCommented Sep 8, 2020 at 12:30
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2Ubuntu Software has GUI applications that make shifting the timing of subtitles much easier to do.– karelCommented Sep 8, 2020 at 17:16
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3 Answers
Using ffmpeg this command do the job !
ffmpeg -itsoffset 2 -i subtitles.srt -c copy subtitles_delayed.srt
You can try:
Subsync.
Subsync is a command line tool to syncronize srt subtitles.
You can use it to fix subtitles with both constant and variable time shift.
https://github.com/spion/subsync
Ffsubsync
Language-agnostic automatic synchronization of subtitles with video,
so that subtitles are aligned to the correct starting point within the video.
You can try srt-stf (srt subtitles time fixer):
A simple tool written in Python: netharuM / srt-subtitle-time-fix
srt-stf --file <input_track>.srt --time 00:00:28,500 -o <output>.srt
This command will slow the subtitle by 28.5 seconds. And if you want the subtitles to appear sooner simply add the '-n' flag
srt-stf --file <input_track>.srt --time 00:00:28,500 -n -o <output>.srt
