Video Splitter via Subtitles Timestamps

These scripts split the original video into chunks accordnig to subtitles timestamps.

Under the hood script uses ffmpeg so you will need to have that installed. Sound in 5.1 format squashes to the stereo by using the ffmpeg commands.

Requirements

1. FFmpeg for manipulating with video file.
   • See FFmpeg installation guide for details.
2. Python 3 for running the scripts.
3. srt library to parse the .srt file with subtitles.
   • Install it with pip install srt.

Hardsub

You can optionally burn the subtitles into the video with the following ffmpeg command:

• ffmpeg -i cutted.avi -vcodec libx264 -vf subtitles=cutted.srt:force_style='Fontsize=26' -y output.avi

Use the force_style attribute to adjust the subtitles appearance. Also see the Subtitles filter documentation and this How to burn subtitles into video guide.

Splitting video

As an input you should have the video and the correctly synchronized subtitles in .srt format. Please, check that before proceeding.

Prepare the config

• python .\srt2csv.py -i input\Terminator.srt -o terminator_config.csv

This makes the config file which looks something like this:

start_time	end_time	rename_to	content
...	...	...	...
00:05:53,697	00:05:55,231	video15.mpg	You clothes.
00:05:55,299	00:05:56,933	video16.mpg	Give them to me.
00:05:57,001	00:05:58,301	video17.mpg	Now.
...	...	...	...

You should inspect the config and leave only lines you want to extract from the input video.

Split by subtitles

Using the config you can split the video now.

• python .\ffmpeg-split.py -f terminator.avi -m terminator_config.csv -v libx264

This splits terminator.avi into chunks using the H.264 encoder. In case of troubles you can omit -v parameter to use the original encoder or choose different supported by ffmpeg encoder (see the list in the ffmpeg documentation).

Output

The resulted video will be placed in the output/video folder.

Useful ffmpeg commands

• To cut the 10 seconds after the first minute
  • ffmpeg -i input.mkv -vcodec libx264 -ss 00:01:00 -t 00:00:10 cutted_10s.mkv
• To cut the video between two timestamps
  • ffmpeg -i input.mkv -vcodec libx264 -ss 00:02:00 -to 00:02:30 cutted_30s.mkv
• To rescale the video
  • ffmpeg -i input.avi -vf scale=1200:-1 output.avi