How to download a YouTube video with Chinese and English subtitles, and merge both Chinese and English subtitles into the video to create a video with embedded bilingual subtitles.
The same applies to other languages.
yt-dlp --write-subs --write-auto-subs --sub-format SRT --sub-langs "en,en-orig,zh-Hans" --write-thumbnail --write-description https://www.youtube.com/xxxxx
# or:
yt-dlp --write-subs --write-auto-subs --sub-format srt --convert-subs "srt" --sub-langs "en,en-orig,zh-Hans" --write-thumbnail --write-description "https://www.youtube.com/watch?v=ZA9K0JMrbWg"
python merge_subtitle.py <srt_file1> <srt_file2> merged_subtitles.srtThe output file content is like this:
1
00:00:00,000 --> 00:00:02,430
自计算机开始以来，编码
Coding has been the bread and butter for
2
00:00:02,430 --> 00:00:04,290
一直是开发人员的必需品。
developers since the dawn of computing.
Thus you can get a video file with embedded subtitles in two languages.
ffmpeg -i input_video.mp4 -vf "subtitles=merged_subtitles.srt" -c:a copy output_video.mp4
$ pip install -r requirements.txt
# install ffmpeg on mac:
$ brew install ffmpeg
# for Ubuntu/Debian, install by apt:
$ sudo apt-get install ffmpeg
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