Add Subtitles to Videos2017-12-30
Subtitles can be added to videos without modifying the video data itself. This allows to enable the subtitles in the video player on demand.
Create a subtitle file in srt or ass format
This example shows a srt file
1 00:00:02,440 --> 00:00:05,375 line A1 line B1 2 00:00:05,476 --> 00:00:08,501 next line
Embed Subtitles in Video
In order too keep the video as is the streams are copied to the output file. For the subtitles a separate data stream is added which contains the subtitle information. Adding subtitles to MPEG4 video from a srt file
Adding subtitles to MKV video from a srt fileffmpeg -i <videoInputFile.mp4> -f srt -i <subtitles.srt> -map 0:v -map 0:a -c copy -map 1 -c:s mov_text <videoOutputFile.mp4>
For specific cases ffmpeg supports a lot more subtitle options. When using vlc for playing MKV videos make sure it contains libmatroska support, otherwise the subtitles will not be shown.ffmpeg -i <videoInputFile.mkv> -f srt -i <subtitles.srt> -map 0:v -map 0:a -c copy -map 1 -c:s srt <videoOutputFile.mkv>
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