adds duration parsing, changes default --to and --from datetimes to tomorrow from today

mt_clockwheel.py

@@ -4,14 +4,15 @@ from glob import glob
 import json
 from listdict import ListDict
 import os
+import subprocess
 
 # globals
 mediadir = "/var/lib/ffplayout/tv-media"
 playlistdir = "/var/lib/ffplayout/playlists"
 channel = "newellijaytelevision"
 verbose = False
-from_date = datetime.date.today()
+from_date = datetime.date.today() + datetime.timedelta(days=1) # tomorrow by default
-to_date = datetime.date.today()
+to_date = datetime.date.today() + datetime.timedelta(days=1)   # tomorrow by default
 playlist_duration = 6 * 60 * 60 # six hours, in seconds
 mediadirs = ListDict()
 
@@ -127,14 +128,30 @@ def get_playlist_entry(get_commercial):
 
     this_file = media_files.choose_random_item() if media_files.length() > 0 else ""
     if this_file == "":
-        return "", 0 # get out of this oopsie situation and try again
+        if verbose:
+            print('cannot select file from empty folder')
+        return {}, 0 # get out of this oopsie situation and try again
 
-    # TODO: ffprobe file for duration
+    if verbose:
+        print('selected file: ' + this_file)
+
+    # probe file for details
+    metadata = json.loads(json.dumps(probe(this_file), sort_keys=True, indent=4))
+
+    if verbose:
+        print('file metadata: ', metadata)
+        print('format: ', metadata['format'])
+
+    duration = int(float(metadata['format']['duration_secs'])) if "duration_secs" in metadata['format'].keys() else int(float(metadata["format"]["duration"])) if "duration" in metadata['format'].keys() else 0
+    if duration == 0:
+        if verbose:
+            print('cannot parse duration of ' + this_file)
+        return {}, 0 # cannot parse duration, so skip this file
 
     entry = {
         "in": 0,
-        "out": 300,
+        "out": duration,
-        "duration": 300,
+        "duration": duration,
         "source": this_file
     }
 
@@ -145,6 +162,23 @@ def get_playlist_entry(get_commercial):
 
     return entry, length
 
+def probe(file):
+    cmd = ['ffprobe', '-v', 'quiet', '-print_format', 'json', '-show_format', '-show_streams', f"{file}"]
+    p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    out, err = p.communicate()
+    if len(out) > 0:
+        result = json.loads(out)
+    else:
+        result = {}
+    if err:
+        print("===err===")
+        print(err)
+
+    if verbose:
+        print('ffprobe result: ', result)
+
+    return result
+
 # generator function to yield single dates from a date range
 def daterange(start_date, end_date):
     for n in range(int((end_date - start_date).days) + 1): # adding 1 to make the range inclusive