ffmpeg:subtitles:add_subtitles_from_a_srt_file
Table of Contents
ffmpeg - Subtitles - Add subtitles from a SRT file
Adding Soft Subtitles
ffmpeg -i input.mp4 -i subtitle.srt -c copy -c:s mov_text -metadata:s:s:0 language=eng output.mp4 ffmpeg -i input.mp4 -i subtitle.srt -c copy -c:s srt -metadata:s:s:0 language=eng output.mkv
NOTE: Different syntax is used for MP4 and MKV.
- -c copy specifies that the video is not to be re-encoded.
- -c:s mov_text sets the SRT file to MOV_TEXT format.
- -c:s srt sets the SRT file to SRT format for MKV.
- -metadata:s:s:0 means to set the metadata for Stream:Subtitle:Number of stream, starting with 0.
- language=eng sets the subtitle language to English.
- The value for this option uses the ISO 639 language code which consists of 3 letters for every language.
Adding Hard Subtitles
ffmpeg -i input.mp4 -vf subtitles=subtitle.srt output.mp4
NOTE: The subtitles will be added to the video using the default font styles.
- -vf is an alias for -filter:v.
- subtitles=subtitle.srt is the name of the filter followed by the name of the SRT subtitle file.
Adding Soft Subtitles with additional formatting
Use a SRT subtitle file and change the size of the font by putting ASS style format KEY=VALUE pairs separated by a comma.
ffmpeg -i input.mp4 -vf subtitles=sub.srt:force_style='FontName=DejaVu Serif,FontSize=24' -vcodec libx264 -acodec copy -q:v 0 -q:a 0 output.mp4
NOTE: This will put the subtitles with DejaVu font and size 24 while keeps the quality of the video.
References
ffmpeg/subtitles/add_subtitles_from_a_srt_file.txt · Last modified: 2024/12/30 22:10 by peter