Public bug reported:

The option "-q" and "-Qm" should both suppress error messages.

Both do not prevent the message "No Exif data found in the file", which 
is shown on stderr when there are no such data:

$ exiv2 -Qm pr test.jpg
File name       : test.jpg
File size       : 241565 Bytes
MIME type       : image/jpeg
Image size      : 2338 x 1654
test.jpg: No Exif data found in the file

(Same result for "exiv2 -q pr test.jpg")

Option "-q" is described as "Silence  warnings  and  error messages from the 
Exiv2 library...". 
Even though it's not obvious whether the message above is strictly from the 
library or from 
the "exiv2" tool using the library, the description makes me expect the message 
would be suppressed.
Option "-Qm" is setting the log level (of the tool, I suppose) to "mute" - 
which should clearly 
suppress the message. 
Also, the description notes "-Qm is equivalent to -q" - implying that "-q" 
should also mute.

** Affects: exiv2 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1398251

Title:
  Options "-q" and "-Qm" not making quiet

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