Thanks, buddy!
  so then, this is a known file:

JumpJiveAnWail.mp3: Audio file with ID3 version 2.4.0, contains: MPEG ADTS,
layer III, v1,  32 kbps, 44.1 kHz, Stereo

  MPEG tells mpeg. Does 'layer III', or 'ID3' tell me it is an 'mp3'?
:-)~MIKE~(-:


On Tue, Aug 21, 2012 at 7:15 AM, sean ritzler <sean.a.ritzler@gmail.com>wrote:

> You can do do `file /path/to/file` to see what it really is. file's man
> page is pretty useful as well.
>
> On Tue, Aug 21, 2012 at 12:24 AM, Michael Havens <bmike1@gmail.com> wrote:
>
>> well, I figured out that with youtube-dl you need to know the format of
>> the video to extract the audio (I suppose that means it actually is for
>> ffmpeg). How does one figure out the format of the original file if it
>> isn't listed in the file extension?
>> :-)~MIKE~(-:
>>
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