FFMpeg

add Timestamp to Video
ffmpeg -i <video_in>.mp4 \ 
	-vf "drawtext = fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSerif.ttf: text = '%{pts:gmtime:0:%M\\\\:%S}':\x=80: y=125: fontsize=48: fontcolor=white@1.0: box=1: boxcolor=black@1.0" \
 	<video_out>.mp4

convert all files of type in directory
for i in *.ts; do ffmpeg -i "${i}" -c:v libx264 -c:a copy -c:s mov_text "${i%%.*}.mp4"; done

Find video Codec of Video
ffprobe -select_streams v0 -show_entries "format:stream" \
 -of json -v quiet \
 -i ./path/to/videofile.extension \
 | grep -w "format_name" | cut -d "\"" -f4
 
 mpegts