How to Add Subtitles To Mp4 with FFmpeg

This guide covers everything you need to know about add subtitles to mp4 using FFmpeg.

Basic Command

ffmpeg -i input.mp4 [parameters] output.mp4

Common Parameters

• -i - Input file
• -c:v - Video codec
• -c:a - Audio codec
• -crf - Quality (lower = better)
• -preset - Encoding speed

Examples

Example 1

ffmpeg -i video.mp4 -c:v libx264 -crf 23 output.mp4

Example 2

ffmpeg -i video.mp4 -c copy output.mp4

Tips

1. Use -c copy for fastest processing
2. Adjust CRF for quality/size balance
3. Use -preset fast for quicker encoding

Conclusion

Master add subtitles to mp4 with these commands and you'll be a pro in no time!