What subtitle file editor for '.srt' files supports synchronization? [closed]

VLC also lets you add (or subtract) subtitle delay so you can sync them up while viewing. Ctrl-H and Ctrl-J shift the delay by 50ms in either direction.

SRT files are basic text files, so once you've found an offset that looks right in VLC, use perl or sed (or your favorite scripting language) to add that offset to all the timecodes in the file.

(Or try the aforementioned subtitle editor programs if you're not up for the challenge of off-the-cuff timecode math.)

I strictly recommend Subtitle Edit.

Features:

Visually sync/adjust a subtitle (start/end position and speed).

Create/add subtitle lines

Translation helper (for manual translation)

Convert between SubRib, MicroDVD, Substation Alpha, SAMI, and more

Import VobSub sub/idx binary subtitles (code is ripped from Subtitle Creator by Erik Vullings/Manusse)

Can read and write UTF-8 and other unicode files (besides ANSI)

Show texts earlier/later

Merge/split

Adjust display time

Fix common errors wizard

Remove text for hear impaired

Renumbering

Swedish to danish translation built-in (via Multi Translator Online)

Google translation built-in

Spell checking via Open Office dictionaries/NHunspell (many dictionaries available)

Effects: Typewriter and karoake

Can open subtitles embedded inside matroska files

History/undo manager