audio-key: truncate at 5min + mojibake support

bin/mtag/audio-key.py

@@ -1,18 +1,52 @@
 #!/usr/bin/env python
 
+import os
 import sys
+import tempfile
+import subprocess as sp
 import keyfinder
 
+from copyparty.util import fsenc
+
 """
 dep: github/mixxxdj/libkeyfinder
 dep: pypi/keyfinder
 dep: ffmpeg
-
-note: cannot fsenc
 """
 
 
-try:
-    print(keyfinder.key(sys.argv[1]).camelot())
-except:
-    pass
+# tried trimming the first/last 5th, bad idea,
+# misdetects 9a law field (Sphere Caliber) as 10b,
+# obvious when mixing 9a ghostly parapara ship
+
+
+def det(tf):
+    # fmt: off
+    sp.check_call([
+        "ffmpeg",
+        "-nostdin",
+        "-hide_banner",
+        "-v", "fatal",
+        "-y", "-i", fsenc(sys.argv[1]),
+        "-t", "300",
+        "-sample_fmt", "s16",
+        tf
+    ])
+    # fmt: on
+
+    print(keyfinder.key(tf).camelot())
+
+
+def main():
+    with tempfile.NamedTemporaryFile(suffix=".flac", delete=False) as f:
+        f.write(b"h")
+        tf = f.name
+
+    try:
+        det(tf)
+    finally:
+        os.unlink(tf)
+
+
+if __name__ == "__main__":
+    main()