From b1a11191fdda06f737ce6d9b25e21fbcc6bb16d1 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Sat, 6 Jan 2018 17:52:57 +0100
Subject: demux_null: mark as seekable

No reason not to, and enables some strange constructions with
--external-file (although the result is not too smooth for certain
reasons).
---
 demux/demux_null.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/demux/demux_null.c b/demux/demux_null.c
index 1d4f4df794..0ce3ac4af6 100644
--- a/demux/demux_null.c
+++ b/demux/demux_null.c
@@ -24,6 +24,7 @@ static int try_open_file(struct demuxer *demux, enum demux_check check)
     if (!bstr_startswith0(bstr0(demux->filename), "null://") &&
         check != DEMUX_CHECK_REQUEST)
         return -1;
+    demux->seekable = true;
     return 0;
 }
 
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