From 73f13dfc4259317a3c1e658cbfa86d517ef14478 Mon Sep 17 00:00:00 2001
From: "wenjie.zhao" <zhaowenjie@cyou-inc.com>
Date: Thu, 12 Mar 2015 23:39:44 +0800
Subject: [PATCH] fix hls muxer Segmentation fault.

---
 trunk/src/app/srs_app_hls.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/trunk/src/app/srs_app_hls.cpp b/trunk/src/app/srs_app_hls.cpp
index 8cf8dc74c..7328bc4c9 100644
--- a/trunk/src/app/srs_app_hls.cpp
+++ b/trunk/src/app/srs_app_hls.cpp
@@ -731,6 +731,10 @@ int SrsHlsCache::write_audio(SrsAvcAacCodec* codec, SrsHlsMuxer* muxer, int64_t
         }
     }
 
+    if (!cache->audio) {
+        return ret;
+    }
+
     // TODO: config it.
     // in ms, audio delay to flush the audios.
     int64_t audio_delay = SRS_CONF_DEFAULT_AAC_DELAY;