include chapters in avinfo

ox/file.py

@@ -206,6 +206,7 @@ def ffprobe(filename):
     p = subprocess.Popen([
         cmd('ffprobe'),
         '-show_format',
+        '-show_chapters',
         '-show_streams',
         '-print_format',
         'json',
@@ -238,6 +239,16 @@ def ffprobe(filename):
         info['audio'] = []
         info['video'] = []
         info['metadata'] = ffinfo['format'].get('tags', {})
+        chapters = ffinfo.get('chapters', [])
+        if chapters:
+            info['chapters'] = [
+                {
+                    'in': float(chapter['start_time']),
+                    'out': float(chapter['end_time']),
+                    'value': chapter.get('tags', {}).get('title')
+                }
+                for chapter in chapters if chapter.get('tags', {}).get('title')
+            ]
         for s in ffinfo['streams']:
             tags = s.pop('tags', {})
             language = None