avoid transcode-all to overwrite existing files

diff --git a/transcode-all b/transcode-all
index 66f6ca6..5a8c3b5 100755 (executable)
--- a/transcode-all
+++ b/transcode-all
@@ -39,6 +39,11 @@ for filename in $(find "$in_path" -name "*.$in_ext"); do
         new_filename=$(dirname "$filename")/$(basename "$filename" ."$in_ext")"$out_suffix"."$out_format"
     fi
 
+    if [ -e $new_filename ]; then
+        echo "$0: $new_filename already exists" >&2
+        continue
+    fi
+
     case "$out_format" in
         "avi" )
             $FFMPEG -i "$filename" -f avi -acodec libmp3lame -ab $ABITRATE -ar 44100 -ac 2 -vcodec libx264 -vpre normal -b "$bitrate" -r 25 -s $resolution -threads 0 "$new_filename"