From 4da3291157ce38b0baa41c16782be94da6ec2b0a Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Tue, 19 Aug 2014 20:29:38 +0200
Subject: [PATCH] decoder/ffmpeg: check InputStream::KnownSize()

---
 src/decoder/plugins/FfmpegDecoderPlugin.cxx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/decoder/plugins/FfmpegDecoderPlugin.cxx b/src/decoder/plugins/FfmpegDecoderPlugin.cxx
index 097ec919f..40dd627b5 100644
--- a/src/decoder/plugins/FfmpegDecoderPlugin.cxx
+++ b/src/decoder/plugins/FfmpegDecoderPlugin.cxx
@@ -135,6 +135,9 @@ mpd_ffmpeg_stream_seek(void *opaque, int64_t pos, int whence)
 		break;
 
 	case AVSEEK_SIZE:
+		if (!stream->input.KnownSize())
+			return -1;
+
 		return stream->input.GetSize();
 
 	default: