exiftool(1p) _MG_4757.JPG -thumbnailimage -b | exiftool(1p) -comment="@CiberPoliES, ¿Te pagas un café?" - | exiftool(1p) _MG_4757.JPG -thumbnailimage'<=-'
Read and write meta information in files
-t (-tab)
     Output a tab-delimited list of description/values (useful for database import).  May be combined
     with -s to print tag names instead of descriptions, or -S to print tag values only, tab-delimited on
     a single line.  The -t option may also be used to add tag table information to the -X option output.
-h (-htmlFormat)
     Use HTML table formatting for output.  Implies the -E option.  The formatting options -D, -H, -g,
     -G, -l and -s may be used in combination with -h to influence the HTML format.
-u (-unknown)
     Extract values of unknown tags.  Add another -u to also extract unknown information from binary data
     blocks.  This option applies to tags with numerical tag ID's, and causes tag names like
     "Exif_0xc5d9" to be generated for unknown information.  It has no effect on information types which
     have human-readable tag ID's (such as XMP), since unknown tags are extracted automatically from
     these formats.
-m (-ignoreMinorErrors)
     Ignore minor errors and warnings.  This enables writing to files with minor errors and disables some
     validation checks which could result in minor warnings.  Generally, minor errors/warnings indicate a
     problem which usually won't result in loss of metadata if ignored.  However, there are exceptions,
     so ExifTool leaves it up to you to make the final decision.
-b (-binary)
     Output requested data in binary format without tag names or descriptions.  This option is mainly
     used for extracting embedded images or other binary data, but it may also be useful for some text
     strings since control characters (such as newlines) are not replaced by '.' as they are in the
     default output.  Also valid in combination with the "-X" option.
-n (--printConv)
     Read and write values as numbers instead of words.  By default, extracted values are converted to a
     more human-readable format for printing, but the -n option disables this print conversion for all
     tags.  For example:
  -a          (-duplicates)        Allow duplicate tags to be extracted
  -e          (--composite)        Do not calculate composite tags
  -ee         (-extractEmbedded)   Extract information from embedded files
  -ext EXT    (-extension)         Process files with specified extension
  -F[OFFSET]  (-fixBase)           Fix the base for maker notes offsets
  -fast[NUM]                       Increase speed for slow devices
  -fileOrder [-]TAG                Set file processing order
  -i DIR      (-ignore)            Ignore specified directory name
  -if EXPR                         Conditionally process files
  -m          (-ignoreMinorErrors) Ignore minor errors and warnings
  -o OUTFILE  (-out)               Set output file or directory name
  -overwrite_original              Overwrite original by renaming tmp file
  -overwrite_original_in_place     Overwrite original by copying tmp file
  -P          (-preserve)          Preserve date/time of original file
  -password PASSWD                 Password for processing protected files
  -q          (-quiet)             Quiet processing
  -r          (-recurse)           Recursively process subdirectories
  -scanForXMP                      Brute force XMP scan
  -u          (-unknown)           Extract unknown tags
  -U          (-unknown2)          Extract unknown binary tags too
  -z          (-zip)               Read/write compressed information

Special features
-i DIR (-ignore)
     Ignore specified directory name.  Use multiple -i options to ignore more than one directory name.  A
     special DIR value of "SYMLINKS" (case sensitive) may be specified to ignore symbolic links when the
     -r option is used.
-l (-long)
     Use long 2-line Canon-style output format.  Adds a description and unconverted value to the XML
     output when -X is used.
-e (--composite)
     Extract existing tags only -- don't calculate composite tags.
    A  pipeline is a sequence of one or more commands separated by one of the control operators | or |&.  The
    format for a pipeline is:

           [time [-p]] [ ! ] command [ [||&] command2 ... ]

    The standard output of command is connected  via  a  pipe  to  the  standard  input  of  command2.   This
    connection  is performed before any redirections specified by the command (see REDIRECTION below).  If |&
    is used, the standard error of command is connected to command2's standard input through the pipe; it  is
    shorthand  for  2>&1  |.   This  implicit  redirection  of  the  standard  error  is  performed after any
    redirections specified by the command.

    The return status of a pipeline is the exit status of the last command, unless  the  pipefail  option  is
    enabled.   If  pipefail  is  enabled,  the  pipeline's return status is the value of the last (rightmost)
    command to exit with a non-zero status, or zero if all commands exit successfully.  If the reserved  word
    !   precedes  a  pipeline, the exit status of that pipeline is the logical negation of the exit status as
    described above.  The shell waits for all commands in the pipeline to terminate before returning a value.

    If the time reserved word precedes a pipeline, the elapsed as well as user and system  time  consumed  by
    its execution are reported when the pipeline terminates.  The -p option changes the output format to that
    specified by POSIX.  When the shell is in posix mode, it does not recognize time as a  reserved  word  if
    the  next  token begins with a `-'.  The TIMEFORMAT variable may be set to a format string that specifies
    how the timing information should be displayed; see the description of TIMEFORMAT under  Shell  Variables

    When the shell is in posix mode, time may be followed by a newline.  In this case, the shell displays the
    total user and system time consumed by the shell and its children.  The TIMEFORMAT variable may  be  used
    to specify the format of the time information.

    Each command in a pipeline is executed as a separate process (i.e., in a subshell).
-c FMT (-coordFormat)
     Set the print format for GPS coordinates.  FMT uses the same syntax as the "printf" format string.
     The specifiers correspond to degrees, minutes and seconds in that order, but minutes and seconds are
     optional.  For example, the following table gives the output for the same coordinate using various

                 FMT                  Output
         -------------------    ------------------
         "%d deg %d' %.2f"\"    54 deg 59' 22.80"  (default for reading)
         "%d %d %.8f"           54 59 22.80000000  (default for copying)
         "%d deg %.4f min"      54 deg 59.3800 min
         "%.6f degrees"         54.989667 degrees


     1) To avoid loss of precision, the default coordinate format is different when copying tags using
     the -tagsFromFile option.

     2) This print formatting may be disabled with the -n option to extract coordinates as signed decimal
source manpages: exiftoolexiftoolexiftool