Document -identify -frames 0

[jidanni@…]

On the man page, at -identify: add that one needs to also use
-frames 0 if one does not want to emit sound.

(At least ImageMagick's identify(1) command doesn't also go and show
you the image by default.)

[jidanni@…]

Also mention a how one can test if one has a valid mp3, etc. file, without having to listen to it.

E.g., I remeber one of *.mp3 that I downloaded did not complete before the modem hung up.
$ mplayer --validate *.mp3
yyy.mp3: truncated
Ah, thank goodness.

[diego@…]

(In reply to comment #1)

Also mention a how one can test if one has a valid mp3, etc. file, without
having to listen to it.

E.g., I remeber one of *.mp3 that I downloaded did not complete before the
modem hung up.
$ mplayer --validate *.mp3
yyy.mp3: truncated

--validate is not a valid MPlayer option.

Anyway, bug is fixed.