+ seekable = info_dict.get('_seekable')
+ if seekable is not None:
+ # setting -seekable prevents ffmpeg from guessing if the server
+ # supports seeking(by adding the header `Range: bytes=0-`), which
+ # can cause problems in some cases
+ # https://github.com/rg3/youtube-dl/issues/11800#issuecomment-275037127
+ # http://trac.ffmpeg.org/ticket/6125#comment:10
+ args += ['-seekable', '1' if seekable else '0']
+