Command line app to show movie running time

"Most commandline encoding tools can provide this information. Tack on some shell scripting to trim the output to just the line including duration.

Tack on some more to process that line into your desired ""xxx min"" output. Exactly what you need for that depends on which tool you'd be using. (See the mplayer example for a suggestion.) Once you've got that, you can create a shell script or alias to run that command with running_time.

FFMpeg:

ffmpeg -i foo.avi
ffmpeg -i foo.avi 2>&1 | grep Duration

Mplayer/Mencoder (ID_LENGTH is in seconds):

mplayer -vo null -ao null -identify -frames 0 foo.avi
mplayer -vo null -ao null -identify -frames 0 foo.avi | grep ID_LENGTH

# ugly, but outputs ""xx mins""
mplayer -identify -ao null -vo null -frames 0 foo.avi | grep ^ID_LENGTH= | cut -d = -f 2 | perl -lne 'print sprintf(""%d mins"", $_/60)'

Transcode (with tcprobe tool):

tcprobe -i foo.avi
tcprobe -i foo.avi | grep duration"