Add mp4ff verification and OUTPUT_DIR support

.env.example

@@ -1,4 +1,5 @@
 OQEE_USERNAME=your_username
 OQEE_PASSWORD=your_password
 API_KEY=your_api_key_here
-API_URL=https://example.com/get-cached-keys
+API_URL=https://example.com/get-cached-keys
+OUTPUT_DIR=./download

README.md

@@ -115,9 +115,9 @@ In order to decrypt DRM content, you will need to have a dumped CDM, after that
     - [x] Lib to install (pip + mp4ff + ffmpeg) 
     - [ ] Demo GIF
 - [ ] Lint code
-- [ ] Oqee widevine license implementation (.wvd) + mention README
+- [x] Oqee widevine license implementation (.wvd) + mention README
 - [x] Full implementation
-- [ ] Verify mp4ff installation
+- [x] Verify mp4ff installation
 - [x] CLI arguments implementation + documentation
 - [ ] French/English full translation
 - [ ] Better output system

main.py

@@ -13,7 +13,7 @@ from utils.input import (
 )
 from utils.oqee import OqeeClient
 from utils.downloader import get_keys
-from utils.utilities import verify_cmd, merge_segments, decrypt
+from utils.utilities import verify_cmd, merge_segments, decrypt, verify_mp4ff
 from utils.times import (
     convert_date_to_sec,
     convert_sec_to_ticks,
@@ -90,6 +90,7 @@ def parse_arguments():
 
 if __name__ == "__main__":
     args = parse_arguments()
+    verify_mp4ff()
 
     # Check if CLI mode
     cli_mode = any(
@@ -196,7 +197,7 @@ if __name__ == "__main__":
             title = title or f"{freebox_id}_{start_date.strftime('%Y%m%d_%H%M%S')}"
             keys = []
         
-        output_dir = args.output_dir if cli_mode else "./download"
+        output_dir = os.getenv("OUTPUT_DIR") or (args.output_dir if cli_mode else "./download")
 
         start_tick_user = int(convert_sec_to_ticks(convert_date_to_sec(start_date), TIMESCALE))
 

utils/utilities.py

@@ -2,6 +2,17 @@ import os
 import sys
 import logging
 import subprocess
+import shutil
+
+
+def verify_mp4ff():
+    """Verify if mp4ff-decrypt is installed and available in PATH."""
+    if shutil.which("mp4ff-decrypt") is None:
+        print("❌ Error: mp4ff-decrypt is not installed or not in PATH.")
+        print("Please install it using:")
+        print("go install github.com/Eyevinn/mp4ff/cmd/mp4ff-decrypt@latest")
+        sys.exit(1)
+    return True
 
 
 def verify_cmd(path: str) -> bool: