With ffmpeg, use the below command to calculate maximum timestamps ffmpeg -i INPUT -map 0:v -map 0:a -enc_time_base -1 -c copy -f null - Note the time= va

With ffmpeg, use the below command to calculate maximum timestamps ffmpeg -i INPUT -map 0:v -map 0:a -enc_time_base -1 -c copy -f null - Note the time= value at the end of the process.