diff --git a/Convention photos/Traitements/rphoto b/Convention photos/Traitements/rphoto
index b37abaa..d3fb02d 100755
--- a/Convention photos/Traitements/rphoto	
+++ b/Convention photos/Traitements/rphoto	
@@ -27,7 +27,7 @@ doRename()
 {
     local filename=$(basename $1)
     #echo "$filename"
-    jhead -nIMG%Y%m%d-%H%M%S "$filename"
+    jhead -nimg%Y%m%d-%H%M%S "$filename"
 }
 
 doRenameCarefully()
@@ -35,9 +35,13 @@ doRenameCarefully()
     local filename=$(basename $1)
     #echo "$filename"
     if [[ $filename =~ IMG[12][90][0-9][0-9][01][0-9][0-3][0-9][012][0-9][0-5][0-9][0-5][0-9].* ]]; then
-        local target=${filename:0:11}-${filename:11}
-        echo "$filename -r> $target"
-        mv -f "$filename" "$target"
+        local target=img${filename:3:8}-${filename:11}
+        if [ -e "$target" ]; then
+            echo "$filename -r> $target ABORT because file already exists."
+        else
+            echo "$filename -r> $target"
+            mv "$filename" "$target"
+        fi
     elif [[ $(exiftool $filename | grep -c "Date/Time Original") > 0 ]]; then
         #echo "yop $filename"
         doRename "$filename"