From a2d19baaa3996bc63edc042230074fb84a2433a1 Mon Sep 17 00:00:00 2001
From: chenshijun <csj_sky@126.com>
Date: 星期二, 03 十二月 2019 19:57:03 +0800
Subject: [PATCH] 修改bug

---
 libcffmpeg.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/libcffmpeg.c b/libcffmpeg.c
index 616c046..cbdc727 100644
--- a/libcffmpeg.c
+++ b/libcffmpeg.c
@@ -82,7 +82,10 @@
 char * wrap_fn_get_gb28181_pic(void *lib, const char *rtspUrl, int *retDataLen){
     if (!fn_get_gb28181_pic){
         fn_get_gb28181_pic = (lib_cffmpeg_get_gb28181_pic)dlsym(lib, "c_ffmpeg_get_gb28181_pic");
-        if(!fn_get_gb28181_pic) return;
+        if(!fn_get_gb28181_pic) {
+            *retDataLen = 0;
+            return NULL;
+        }
     }
     return fn_get_gb28181_pic(rtspUrl, retDataLen);
 }

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