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+ | ====== MPGLen ====== | ||
+ | |||
+ | The MPEG file format has no index or length information embedded. This makes it impossible to know the playing time of the file. | ||
+ | |||
+ | This program will scan a MPEG file and count the number of GOPs and frames. When combined with another tool which reports framerate information, like mpginfo, the exact playing time can be calculated. | ||
+ | |||
+ | {{sw:mpglen.tar.gz}} | ||
+ | |||
+ | usage: mpglen [-a] [-c size] [-d] [-e] [-f] [-g] [-h] [-p] [-t] file [file] ... | ||
+ | -a show n total for all files processed as "Total #frames #GOPs\n". | ||
+ | -c size process file(s) in chunks of <size> Mb. (Default 4) | ||
+ | -d emit debugging messages on stderr. | ||
+ | -e easily parseable output "#frames #GOPs filename\n". | ||
+ | -f only print "#frames\n". | ||
+ | -g only print "#GOPs\n". | ||
+ | -p emit progress report as each chunk is processed. | ||
+ | -t terse output, only prints "#frames #GOPs\n". | ||
+ | -h show this usage message. | ||
+ | Setting -d as the first argument will show argument parsing, too. | ||
+ | If you use -s, the exit code will report success(0) or failure(-1) | ||
+ | Exit codes: 0=Success -1=Parse error -2=m[un]map error -3=Other | ||