From eeb975f5cda31aff3deb8cb4925ea0bf3e897236 Mon Sep 17 00:00:00 2001
From: Nicolas George <george@nsup.org>
Date: Sat, 2 Nov 2013 16:23:26 +0100
Subject: [PATCH] lavf/wavenc: check for a single stream.

Fix trac ticket #3110.
---
 libavformat/wavenc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavformat/wavenc.c b/libavformat/wavenc.c
index fea38cf326..0067dfef29 100644
--- a/libavformat/wavenc.c
+++ b/libavformat/wavenc.c
@@ -116,6 +116,11 @@ static int wav_write_header(AVFormatContext *s)
     AVIOContext *pb = s->pb;
     int64_t fmt;
 
+    if (s->nb_streams != 1) {
+        av_log(s, AV_LOG_ERROR, "WAVE files have exactly one stream\n");
+        return AVERROR(EINVAL);
+    }
+
     if (wav->rf64 == RF64_ALWAYS) {
         ffio_wfourcc(pb, "RF64");
         avio_wl32(pb, -1); /* RF64 chunk size: use size in ds64 */