Fix bugs, Add error messages

ripper/transfer_ripped.py

@@ -3,13 +3,21 @@
 import os
 import subprocess
 
-DESTINATION_FOLDER = "transcoder/raw"  # pi@192.168.xxx:/home/pi/transcoder/raw
+DESTINATION_FOLDER = (
+    "../transcoder/raw"  # pi@192.168.xxx:/home/pi/dvd_rip/transcoder/raw
+)
 RIPPED_DIR = "ripped"
 
 
 def main():
     chdir_to_script_dir()
 
+    if not os.path.exists(DESTINATION_FOLDER):
+        print(
+            f"Destination folder '{DESTINATION_FOLDER}' does not exist. Please run transcoder script to generate it"
+        )
+        exit(1)
+
     for dvd_type in ("movie", "series"):
         for dvd in list_ripped_dvds(dvd_type):
             print(f"Transferring {dvd_type}: {dvd}")