from __future__ import unicode_literals
from .common import FileDownloader
+from .external import get_external_downloader
+from .f4m import F4mFD
from .hls import HlsFD
from .hls import NativeHlsFD
from .http import HttpFD
from .mplayer import MplayerFD
from .rtmp import RtmpFD
-from .f4m import F4mFD
from ..utils import (
determine_protocol,
protocol = determine_protocol(info_dict)
info_dict['protocol'] = protocol
+ external_downloader = params.get('external_downloader')
+ if external_downloader is not None:
+ ed = get_external_downloader(external_downloader)
+ if ed.supports(info_dict):
+ return ed
+
+ if protocol == 'm3u8' and params.get('hls_prefer_native'):
+ return NativeHlsFD
+
return PROTOCOL_MAP.get(protocol, HttpFD)