thedod/rtl-subtitle

Right-to-left subtitles by adding the RLE character to each sentence. Doing this is required when integrating subtitles by video editors such as ffmpeg.

Right-to-left subtitles

This script solves the problem of formatting subtitles in right-to-left languages, making them compatible with video editing software like FFmpeg. By adding the RLE character at the beginning of each text line while preserving the timestamps, it ensures that the subtitles display correctly in the intended right-to-left direction when overlaid on video content. This formatting is crucial for maintaining the legibility and visual integrity of subtitles in languages that use a right-to-left writing system.

The UTF-16 encoding character 0x202B (RLE) (which stands for the "RIGHT-TO-LEFT EMBEDDING" control character) is only added to text-containing lines and not to timestamp lines in your SRT file.

Usage

Make sure to replace sample_subtitle.srt with the path to your input SRT file and output_subtitle.srt with the desired output file path. Then just run:

python rtl-subtitle.py

FFmpeg

Integrate right-to-left subtitles with ffmpeg if you want. Use this simple command:

ffmpeg -i "sample.mp4" -vf "subtitles='output_subtitle.srt'" "sample_output.mp4"

Or this more advanced command:

ffmpeg -i "sample.mp4" -vf "subtitles='output_subtitle.srt':force_style='FontName=vazir,Fontsize=30,PrimaryColour=&Hffffff&'" -ss 00:00:00 -to 00:00:20 -c:v libx264 -c:a aac -b:v 300k -b:a 48k -y "sample_output.mp4"

Sample

Before:

After RTL:

License

By https://twitter.com/NabiKAZ

MIT License

Donation

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