fix: Tighten invalid file detection

friendica-clean-database.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 interval=7
-limit=100000
+limit=1000
 
 echo "tmp_post_origin_deleted"
 tmp_post_origin_deleted_q="${limit}"

friendica-remove-invalid-photos.sh

@@ -51,7 +51,7 @@ do
 				echo "$id $avatar"
                                 sudo -u $user curl "$avatar" -s -o "$k_photo"
                                 #If the file is a valid picture (not empty, not text)
-                                if file "$k_photo" | grep -q -v -e "text" -e "Empty"
+                                if file "$k_photo" | grep -q -v -e "text" -e "empty" -e "symbolic link" -e "directory"
                                 then
                                         #Also fetch for thumb/micro and resize
                                         #As the photo is the largest version we have, we will use it as the base, and leave it last to convert

media-optimize-local.sh

@@ -24,13 +24,13 @@ find . -type f -iname "*.gif" -size +500k | (
     done;
     wait
 )
-#Specific compression for large GIF files
-find . -type f -iname "*.gif" -size +512000 | (
+#Specific compression for large GIF files: halving the frame rate
+find . -type f -size +500k -iname "*-320.gif" -or -iname "*-80.gif" -or -iname "*-48.gif" | (
     while read p
     do
         while [[ $(stat -c%s "${p}" || 0) -ge 512000 ]]
         do
-            frameamount=$(exiftool -b -FrameCount "${p}")
+            frameamount=$(( $(exiftool -b -FrameCount "${p}" || 1) - 1 ))
             nice -n 15 gifsicle "${p}" $(seq -f "#%g" 0 2 "${frameamount}") -O3 --lossy=80 --colors=255 -o "${p}"
         done
     done