X-Git-Url: http://git.cielonegro.org/gitweb.cgi?a=blobdiff_plain;f=youtube_dl%2Fdownloader%2Fexternal.py;h=41e37261d034bbb61dc1932fd08283952e4bee25;hb=7097bffba6769302d9aef7e839baf4c6f30de066;hp=138f353efcde9481ac2b04d01973522cbaedf756;hpb=8bdc149441a86e01c56946090087c005a525260e;p=youtube-dl.git

diff --git a/youtube_dl/downloader/external.py b/youtube_dl/downloader/external.py
index 138f353ef..41e37261d 100644
--- a/youtube_dl/downloader/external.py
+++ b/youtube_dl/downloader/external.py
@@ -199,6 +199,15 @@ class FFmpegFD(ExternalFD):
 
         args = [ffpp.executable, '-y']
 
+        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']
+
         args += self._configuration_args()
 
         # start_time = info_dict.get('start_time') or 0