The standard file format for user-created subtitles is , commonly known as an .srt file . An SRT file is a simple text document that contains numbered subtitle entries, each with a start and end timestamp and the text to be displayed on screen.
ffmpeg -i cawd764engsub.mkv -vf "subtitles=cawd764engsub.mkv" -c:v libx264 -preset slow -crf 20 -c:a aac -b:a 160k -movflags +faststart output_hardsub.mp4 cawd764engsub convert025654 min
Are you trying to watch this on a , a mobile device , or a Smart TV ? The standard file format for user-created subtitles is