def _call_downloader(self, tmpfilename, info_dict):
url = info_dict['url']
ffpp = FFmpegPostProcessor(downloader=self)
+ if not ffpp.available:
+ self.report_error('m3u8 download detected but ffmpeg or avconv could not be found. Please install one.')
+ return False
ffpp.check_version()
args = [ffpp.executable, '-y']