This command will not work with a mp4 with embedded subtitles, so extract it first or google for one.

To extract SRT from MP4:

ffmpeg -i movie.mp4 subtitle.srt

If you have embedded SRT you also need a seperate file with just video and audio. To strip the srt streams, leaving the just video and audio you want.

Example:

ffmpeg -i movie.mp4 -map 0:0 -vcodec copy -map 0:1 -acodec copy movienosubs.mp4

So lets assume you now have

subtitle.srt
movienosubs.mp4

The FFMPEG command would be this: (Note this only copies the first audio stream, you may need to mess around with mapping streams if you wan't to get more complicated, but you get the idea)

ffmpeg -i movienosubs.mp4 -i subtitle.srt -c:v copy -c:a copy -c:s copy movieFINAL.mkv

This command will not work with a mp4 with embedded subtitles & extracting subtitles from an Mp4 will result in MOV_TEXT style subtitle file, which is not what you want. Basically, google for an SRT, test it out and then we are ready to go.

If you have embedded SRT you also need a seperate file with just video and audio. To strip the srt streams, leaving the just video and audio you want.

Example:

ffmpeg -i movie.mp4 -map 0:0 -vcodec copy -map 0:1 -acodec copy movienosubs.mp4

So lets assume you now have

subtitle.srt
movienosubs.mp4

The FFMPEG command would be this: (Note this only copies the first audio stream, you may need to mess around with mapping streams if you wan't to get more complicated, but you get the idea)

ffmpeg -i movienosubs.mp4 -i subtitle.srt -c:v copy -c:a copy -c:s copy movieFINAL.mkv

This command will not work with an embedded subtitles, so extract it first or google for one.

To extract SRT from MP4:

ffmpeg -i movie.mp4 subtitle.srt

If you have embedded SRT you also need a seperate file with just video and audio. To strip the srt streams, leaving the just video and audio you want.

Example:

ffmpeg -i movie.mp4 -map 0:0 -vcodec copy -map 0:1 -acodec copy movienosubs.mp4

So lets assume you now have

subtitle.srt
movienosubs.mp4

The FFMPEG command would be this: (Note this only copies the first audio stream, you may need to mess around with mapping streams if you wan't to get more complicated, but you get the idea)

ffmpeg -i movienosubs.mp4 -i subtitle.srt -c:v copy -c:a copy -c:s copy movieFINAL.mkv

This command will not work with a mp4 with embedded subtitles, so extract it first or google for one.

To extract SRT from MP4:

ffmpeg -i movie.mp4 subtitle.srt

If you have embedded SRT you also need a seperate file with just video and audio. To strip the srt streams, leaving the just video and audio you want.

Example:

ffmpeg -i movie.mp4 -map 0:0 -vcodec copy -map 0:1 -acodec copy movienosubs.mp4

So lets assume you now have

subtitle.srt
movienosubs.mp4

The FFMPEG command would be this: (Note this only copies the first audio stream, you may need to mess around with mapping streams if you wan't to get more complicated, but you get the idea)

ffmpeg -i movienosubs.mp4 -i subtitle.srt -c:v copy -c:a copy -c:s copy movieFINAL.mkv