A simple script for processing screenshots taken with a PS3. Images are cropped (custom for me, edit it to fit your needs), files are renamed and modification dates are retained in a correct sequence.

ps3shot.sh

#!/bin/bash

# This simple script processes screenshots taken with a PS3 and does multiple things:
# - Crops the image to a preferred size (this depends on the game used, remove if desired, or adjust as needed.)
# - Renames all images by sequence, sorted by modification date (dates are copied to the new files)

# Prepare a file list, sorted by modification date.
rm FILELIST 2>/dev/null
ls -tdr1 *.png > FILELIST; 

# Initialize necessary variables.
LIST=`cat FILELIST`
SEQ=1

while read file;
do
   # Track the current modified date
   MDATE=`stat -c '%y' "$file"`

   echo "$file" -> "${SEQ}.png"

   # Then apply the desired operations and apply the modified date onto the new file.
   # If everything works without errors, remove the old file.
   convert "$file" -crop 1217x653+32+18 ${SEQ}.png && touch -d "${MDATE}" ${SEQ}.png && rm "$file"

   # Proceed to the next file and count up on the sequence.
   SEQ=$(( $SEQ + 1 ))
done <FILELIST

# Clean up the temporary file list.
rm FILELIST 2>/dev/null