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shifter3 - Simple Subtitle Shifter

shifter3 is a simple python3 script that allows you to modify a .srt file, shifting its content by any desired time. You only have to provide any number (representing seconds), and all subtitles will be shifted by it.

Usage

$ shifter3 <SHIFT_IN_SECONDS> <INPUT_FILE> [<OUTPUT_FILE>]

shifter3 accepts 2 or 3 arguments:

  • First argument: amount of time you want to shift the subtitles in the .srt file. It will be interpreted as seconds, and it can be a fractional number.
  • Second argument: your .srt input file. If no third argument is provided, shifter3 will overwrite your input file.
  • Third argument (OPTIONAL): your .srt ouput file. If this argument is provided, your input file will be left intact after the execution of this script.

Examples

Subtitles in mysubtitles.srt show up too soon, I want all of them to start (and finish) 0.25 seconds later:

$ shifter3 0.25 mysubtitles.srt

Subtitles in mysubtitles.srt show up too late, I want all of them to start (and finish) 0.25 seconds before:

$ shifter3 -0.25 mysubtitles.srt

Subtitles in mysubtitles.srt show up too late, I want all of them to start (and finish) 1 second before AND get the result in a new file named myNEWsubtitles.srt:

$ shifter3 -1 mysubtitles.srt myNEWsubtitles.srt

Installation

Note: This instructions are aimed at Unix-based systems like Linux (Ubuntu, Debian, OpenSuse...) or Mac OS X, but they may also work in Windows if you use a Linux sub-system.

  1. Install Python (version 3). If you already have installed python3 in your machine, go to step 2. For installing python3, go to the official Python website and follow the instructions.
  2. Clone the repository: $ git clone https://github.com/vpec/shifter3.git. Alternatively, you can download it as zip package and then uncompress it.
  3. Enter the directory: $ cd shifter3
  4. After the download, you might not have execution permissions on the script. To fix this, execute $ chmod u+x shifter3.
  5. If you want to use this script from any directory in your system, you can add the shifter3 directory path to the system 's path. This tutorial explains how to do it.
  6. Now you can execute shifter3. If you didn't follow step number 5, you will have to execute the script from its directory using $ ./shifter3 instead of $ shifter3