Using mplayer to determine length of audio/video file

Question

The following works very nicely to determine the length of various audio/video files:

mplayer -identify file.ogg 2>/dev/null | grep ID_LENGTH

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Answer 1

There's another FF-way in addition to @codelogic's method, which doesn't exit with an error:

ffprobe 

and look for the duration entry.

Or grep for it directly in the error stream:

ffprobe  2> >(grep Duration)