NAME

       recoverjpeg - recover jpeg pictures from a filesystem image

SYNOPSIS

       recoverjpeg [options] device

DESCRIPTION

       Recoverjpeg tries to identify jpeg pictures from a filesystem image. To achieve this goal,
       it scans the filesystem image and looks for a jpeg structure at  blocks  starting  at  512
       bytes boundaries.

       Salvaged  jpeg pictures are stored by default under the name imageXXXXX.jpg where XXXXX is
       a five digit number starting at zero. If there are more than 100,000  recovered  pictures,
       recoverjpeg  will  start  using  six  figures  numbers and more as soon as needed, but the
       100,000 first ones will use a five figures number. Options -f and  -i  can  override  this
       behaviour.

OPTIONS

       -h     Display an help message.

       -b blocksize
              Set  the  size  of  blocks  in  bytes. On most file systems, setting it to 512 (the
              default) will work fine as any large file will be stored on 512  bytes  boundaries.
              Setting it to 1 maximize the chances of finding very small files if the filesystems
              aggregates them (UFS for example) at the expense of a much longer running time.

       -d formatstring
              Set the directory format string (printf-style, default: use the current directory).
              When  used, 0 will be used for the 100 first images, 1 for the 100 next images, and
              so on. The goal of this option is to circumvent the directory size limit imposed by
              some file systems.

       -f formatstring
              Set  the  file  name format string (printf-style, default: "image%05d.jpg").  It is
              used with the image index as an integer argument.

       -i integerindex
              Set the initial index value for image numbering (default: 0).

       -m maxsize
              Maximum size of extract jpeg files. If a file would be  larger  than  that,  it  is
              discarded. The default is 6 MiB.

       -q     Be quiet and do not display anything.

       -r readsize
              Set  the  readsize  in  bytes. By default, this is 128 MiB.  Using a large readsize
              reduces the number of system calls but consumes  more  memory.  The  readsize  will
              automatically  be  adjusted  to  be  a multiple of the system page size. It must be
              greater than the maxsize parameter.

       -s cutoffsize
              Set the cutoff size in bytes. Files smaller than that will be ignored.

       -v     Be verbose and describes the process of jpeg identification. By  default,  if  this
              flag  is  not  used,  recoverjpeg will print a progress bar showing how much it has
              analyzed already and how many jpeg pictures have been recovered.

       -V     Display program version and exit.

       All the sizes may be suffixed by a k, m or g letter to  indicate  KiB,  MiB  or  GiB.  For
       example, 6m correspond to 6 MiB (6291456 bytes).

EXAMPLES

       Recover as many pictures as possible from the memory card located in /dev/sdc:

         recoverjpeg /dev/sdc

       Do the same thing but ignore files smaller than one megabyte:

         recoverjpeg -s 1m /dev/sdc

       Recover  as  many pictures as possible from a crashed ReiserFS file system (which does not
       necessarily store pictures at block boundaries) in /dev/sdb1:

         recoverjpeg -b 1 /dev/sdb1

       Do the same thing in a memory constrained environment where no more than 16MB of  RAM  can
       be used for the operation:

         recoverjpeg -b 1 -r 16m /dev/sdb1

AUTHOR

       Recoverjpeg has been written by Samuel Tardieu <sam@rfc1149.net>.

       If  recoverjpeg  saves  your  day  and  you  liked it, you are welcome to send me the best
       rescued ones by email (please send only 800x600 versions of the pictures) and authorize me
       to put them online (indicate which contact information you want me to use for credits).

COPYRIGHT

       Copyright  (c)  2004-2012  Samuel Tardieu <sam@rfc1149.net> This is free software; see the
       source for copying conditions. There is NO  warranty;  not  even  for  MERCHANTABILITY  or
       FITNESS FOR A PARTICULAR PURPOSE.

SEE ALSO

       recovermov(1), sort-pictures(1)

KNOWN BUGS

       Recoverjpeg  does  not  include  a complete jpeg parser. You may need to use sort-pictures
       afterwards to identify bogus pictures. Some pictures may be corrupted but have  a  correct
       structure;  in  this  case,  the image may be garbled. There is no automated way to detect
       those pictures with a 100% success rate.