video - ffmpeg: add subtitles to mp4 with out creating a new file

Question

ffmpeg -i infile.mp4 -i infile.srt -c copy -c:s mov_text outfile.mp4

adds subtitles to mp4 video but it creates a new file instead just adding few blocks of data to existing file.

Is there a way to modify existing video instead of creating a new one?

subler does it great with in a second, so should ffmpeg.

Answer 1

FFmpeg does not do in-place editing.