Repository: yt-dlp/yt-dlp
File: yt_dlp/extractor/arte.py (Python)

Code before:
        if not traverse_obj(config, ('data', 'attributes', 'rights')):
            # Eg: https://www.arte.tv/de/videos/097407-215-A/28-minuten
            # Eg: https://www.arte.tv/es/videos/104351-002-A/serviteur-du-peuple-1-23
            raise ExtractorError(
                'Video is not available in this language edition of Arte or broadcast rights expired', expected=True)

        formats, subtitles = [], {}
        potential_duplicates = []
        for stream in config['data']['attributes']['streams']:
            # official player contains code like `e.get("versions")[0].eStat.ml5`
            stream_version = stream['versions'][0]
            stream_version_code = stream_version['eStat']['ml5']

            lang_pref = -1
            m = self._VERSION_CODE_RE.match(stream_version_code)
            if m:
                lang_pref = int(''.join('01'[x] for x in (
                    m.group('vlang') == langauge_code,      # we prefer voice in the requested language
                    not m.group('audio_desc'),              # and not the audio description version
                    bool(m.group('original_voice')),        # but if voice is not in the requested language, at least choose the original voice
                    m.group('sub_lang') == langauge_code,   # if subtitles are present, we prefer them in the requested language
                    not m.group('has_sub'),                 # but we prefer no subtitles otherwise
                    not m.group('sdh_sub'),                 # and we prefer not the hard-of-hearing subtitles if there are subtitles
                )))

            short_label = traverse_obj(stream_version, "shortLabel", expected_type=str, default='?')
            if stream['protocol'].startswith('HLS'):
                fmts, subs = self._extract_m3u8_formats_and_subtitles(
                    stream['url'], video_id=video_id, ext='mp4', m3u8_id=stream_version_code, fatal=False)
                for fmt in fmts:
                    fmt.update({
                        'format_note': f'{stream_version.get("label", "unknown")} [{short_label}]',
                        'language_preference': lang_pref,
                    })
                if any(map(short_label.startswith, ('cc', 'OGsub'))):
                    potential_duplicates.extend(fmts)
                else:
                    formats.extend(fmts)
                self._merge_subtitles(subs, target=subtitles)

            elif stream['protocol'] in ('HTTPS', 'RTMP'):
                formats.append({
                    'format_id': f'{stream["protocol"]}-{stream_version_code}',
                    'url': stream['url'],
                    'format_note': f'{stream_version.get("label", "unknown")} [{short_label}]',
                    'language_preference': lang_pref,
                    # 'ext': 'mp4',  # XXX: may or may not be necessary, at least for HTTPS
                })

            else:
                self.report_warning(f'Skipping stream with unknown protocol {stream["protocol"]}')

Review comment (suggestion):
```suggestion
            short_label = traverse_obj(stream_version, 'shortLabel', expected_type=str, default='?')
```

Code after:
        if not traverse_obj(config, ('data', 'attributes', 'rights')):
            # Eg: https://www.arte.tv/de/videos/097407-215-A/28-minuten
            # Eg: https://www.arte.tv/es/videos/104351-002-A/serviteur-du-peuple-1-23
            raise ExtractorError(
                'Video is not available in this language edition of Arte or broadcast rights expired', expected=True)

        formats, subtitles = [], {}
        secondary_formats = []
        for stream in config['data']['attributes']['streams']:
            # official player contains code like `e.get("versions")[0].eStat.ml5`
            stream_version = stream['versions'][0]
            stream_version_code = stream_version['eStat']['ml5']

            lang_pref = -1
            m = self._VERSION_CODE_RE.match(stream_version_code)
            if m:
                lang_pref = int(''.join('01'[x] for x in (
                    m.group('vlang') == langauge_code,      # we prefer voice in the requested language
                    not m.group('audio_desc'),              # and not the audio description version
                    bool(m.group('original_voice')),        # but if voice is not in the requested language, at least choose the original voice
                    m.group('sub_lang') == langauge_code,   # if subtitles are present, we prefer them in the requested language
                    not m.group('has_sub'),                 # but we prefer no subtitles otherwise
                    not m.group('sdh_sub'),                 # and we prefer not the hard-of-hearing subtitles if there are subtitles
                )))

            short_label = traverse_obj(stream_version, 'shortLabel', expected_type=str, default='?')
            if stream['protocol'].startswith('HLS'):
                fmts, subs = self._extract_m3u8_formats_and_subtitles(
                    stream['url'], video_id=video_id, ext='mp4', m3u8_id=stream_version_code, fatal=False)
                for fmt in fmts:
                    fmt.update({
                        'format_note': f'{stream_version.get("label", "unknown")} [{short_label}]',
                        'language_preference': lang_pref,
                    })
                if any(map(short_label.startswith, ('cc', 'OGsub'))):
                    secondary_formats.extend(fmts)
                else:
                    formats.extend(fmts)
                self._merge_subtitles(subs, target=subtitles)

            elif stream['protocol'] in ('HTTPS', 'RTMP'):
                formats.append({
                    'format_id': f'{stream["protocol"]}-{stream_version_code}',
                    'url': stream['url'],
                    'format_note': f'{stream_version.get("label", "unknown")} [{short_label}]',
                    'language_preference': lang_pref,
                    # 'ext': 'mp4',  # XXX: may or may not be necessary, at least for HTTPS
                })

            else:
                self.report_warning(f'Skipping stream with unknown protocol {stream["protocol"]}')