From 14c2f20bffb09452b427cb58d7c792e05f3ca792 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Thu, 1 Mar 2018 21:48:55 +0100
Subject: demux_lavf: don't mess up in streams with unknown size and init
 segment

The return value of stream_get_size() will be -1 if it fails. We
shouldn't mess up this value if a mp4 init segment is used.
---
 demux/demux_lavf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/demux/demux_lavf.c b/demux/demux_lavf.c
index 93117c975c..20cf6429a3 100644
--- a/demux/demux_lavf.c
+++ b/demux/demux_lavf.c
@@ -257,9 +257,10 @@ static int64_t mp_seek(void *opaque, int64_t pos, int whence)
              whence == SEEK_CUR ? "cur" :
              whence == SEEK_SET ? "set" : "size");
     if (whence == SEEK_END || whence == AVSEEK_SIZE) {
-        int64_t end = stream_get_size(stream) + priv->init_fragment.len;
+        int64_t end = stream_get_size(stream);
         if (end < 0)
             return -1;
+        end += priv->init_fragment.len;
         if (whence == AVSEEK_SIZE)
             return end;
         pos += end;
-- 
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