no time specified with option -e

srttool [-v] [options] Modify srt subtitle files. -v Verbose -r Renumber all entries. -d <time> Shift all timestamps by <time> seconds -s Substitute filename after time stamps by its content -i <filename> Use filename for input (default) stdin -o <filename> Use filename for output (default stdout) -c <first[,last]> Write only entries from first to last (default=last entry) to output -a <hh:mm:ss,ms> Adjust all time stamps so that the first tag beginns at hh:mm:ss,ms -x <basename> Reverse -s operation: produce basename.srtx and basenameXXXX.txt files. -w Remove leading white space in text lines -e <seconds> 'Expand' the subtitle hour by <seconds> (valid values are -60.0<=x<=+60.0 seconds) Example: Adjust the subtitle timing by -2.3 seconds. srttool -d -2.3 -i subtitle.srt > new_subtitle.srt