[ard] Improve formats extraction (closes #28155)

youtube_dl/extractor/ard.py

@@ -284,20 +284,42 @@ class ARDIE(InfoExtractor):
 
         formats = []
         for a in video_node.findall('.//asset'):
+            file_name = xpath_text(a, './fileName', default=None)
+            if not file_name:
+                continue
+            format_type = a.attrib.get('type')
+            format_url = url_or_none(file_name)
+            if format_url:
+                ext = determine_ext(file_name)
+                if ext == 'm3u8':
+                    formats.extend(self._extract_m3u8_formats(
+                        format_url, display_id, 'mp4', entry_protocol='m3u8_native',
+                        m3u8_id=format_type or 'hls', fatal=False))
+                    continue
+                elif ext == 'f4m':
+                    formats.extend(self._extract_f4m_formats(
+                        update_url_query(format_url, {'hdcore': '3.7.0'}),
+                        display_id, f4m_id=format_type or 'hds', fatal=False))
+                    continue
             f = {
-                'format_id': a.attrib['type'],
-                'width': int_or_none(a.find('./frameWidth').text),
-                'height': int_or_none(a.find('./frameHeight').text),
-                'vbr': int_or_none(a.find('./bitrateVideo').text),
-                'abr': int_or_none(a.find('./bitrateAudio').text),
-                'vcodec': a.find('./codecVideo').text,
-                'tbr': int_or_none(a.find('./totalBitrate').text),
+                'format_id': format_type,
+                'width': int_or_none(xpath_text(a, './frameWidth')),
+                'height': int_or_none(xpath_text(a, './frameHeight')),
+                'vbr': int_or_none(xpath_text(a, './bitrateVideo')),
+                'abr': int_or_none(xpath_text(a, './bitrateAudio')),
+                'vcodec': xpath_text(a, './codecVideo'),
+                'tbr': int_or_none(xpath_text(a, './totalBitrate')),
             }
-            if a.find('./serverPrefix').text:
-                f['url'] = a.find('./serverPrefix').text
-                f['playpath'] = a.find('./fileName').text
+            server_prefix = xpath_text(a, './serverPrefix', default=None)
+            if server_prefix:
+                f.update({
+                    'url': server_prefix,
+                    'playpath': file_name,
+                })
             else:
-                f['url'] = a.find('./fileName').text
+                if not format_url:
+                    continue
+                f['url'] = format_url
             formats.append(f)
         self._sort_formats(formats)