FILE="$1";             # File name

Image_Rows="$2";       # Number of lines
Image_Columns="$3";    # Number of columns
Image_Resolution="$4"; # Resolution of the final image

# Frame offset
Time_Shift="$5";       # Time shift
File_Suffix="$6";      # File suffix, i.e aaa.avi -> aaa_1.jpg aaa_2.jpg


#+++ In case of no arguments
if [ "$FILE" = "" ]
then
  echo 'What video file do you want to use?';
  echo 'Use <video-file> [Number of lines] [Number of columns] [Resolution of the final image] [Offset] [Suffix of the resulting image]';
  echo 'Suffix is a usual number. Resulting file <video-file>_<Number-suffix>.jpg';
  echo 'Resulting quality of the jpg-file - 100';
  exit 1;
fi

if [ "$Image_Rows" = "" ]
then
  Image_Rows="3"
fi

if [ "$Image_Columns" = "" ]
then
  Image_Columns="3"
fi

if [ "$Image_Resolution" = "" ]
then
  Image_Resolution="1024x768"
fi
if [ "$Image_Resolution" = "0" ]
then
  Image_Resolution="1024x768"
fi

if [ "$Time_Shift" = "" ]
then
  Time_Shift="0"
fi

if [ "$File_Suffix" != "" ]
then
  File_Suffix="_$File_Suffix";
fi
#--- In case of no arguments


FILENAME=${FILE%.*};

# Temporary value of INFO contain data about the video file
INFO=`mplayer -msglevel all=0 -identify -nosound -vc dummy -vo null "$1"`;

# Height of original video frame
HEIGHT=`expr "$INFO" : '.*HEIGHT=\([0-9]*\)'`;

# Width of the original video frame
WIDTH=`expr "$INFO" : '.*WIDTH=\([0-9]*\)'`;

# Number of frames
NUM=$(($Image_Rows*$Image_Columns));

# Time offset
LEN=$((`expr "$INFO" : '.*LENGTH=\([0-9]*\)'`/( $NUM +2)));

#+++ Picking up frames
for kadr in `seq 1 $NUM`
do
  echo "Processing frame $kadr ?? $NUM";
  mplayer -msglevel all=0 -nosound -vo jpeg:outdir=/tmp:quality=100 -frames 2 -ss `echo $Time_Shift+$kadr*$LEN|bc` "$1" > /dev/null;
  rm /tmp/00000001.jpg;
  mv /tmp/00000002.jpg /tmp/"$kadr.jpg";
done
#--- Picking up frames

#+++ Inserting frames
echo Inserting frames...;
Command="convert ";
for i in `seq 1 $Image_Rows`
do
  for j in `seq 1 $Image_Columns`
  do
    kadr=`echo "($i-1)*$Image_Columns+$j"|bc`;
    x_pos=$(( ($HEIGHT+10)*($i-1) ));
    y_pos=$(( ($WIDTH+10)*($j-1) ));
    Command="$Command -page +$y_pos+$x_pos /tmp/$kadr.jpg";

  done
done
Command="$Command -background white -mosaic -bordercolor white -border 10x10 -quality 100 /tmp/tmp0.jpg";
$Command;
#--- Inserting frames

# Changing size
convert /tmp/tmp0.jpg -auto-orient -thumbnail $Image_Resolution -quality 100 /tmp/tmp.jpg

#+++ Removing temporary files
for kadr in `seq 1 $NUM`
do
  rm /tmp/"$kadr.jpg";
done
rm /tmp/tmp0.jpg;
#--- Removing temporary files

mv /tmp/tmp.jpg "$FILENAME$File_Suffix.jpg"
echo All done! - The file is "$FILENAME$File_Suffix.jpg"