- if info_dict['extractor'] in ['youtube', 'ted'] and FFmpegMergerPP(self).available:
- req_format_list.append('bestvideo+bestaudio')
+ if (self.params.get('outtmpl', DEFAULT_OUTTMPL) != '-'
+ and info_dict['extractor'] in ['youtube', 'ted']):
+ merger = FFmpegMergerPP(self)
+ if merger.available and merger.can_merge():
+ req_format_list.append('bestvideo+bestaudio')