diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
index b07c086aa2..351e7f684a 100644
--- a/fftools/ffmpeg.c
+++ b/fftools/ffmpeg.c
@@ -443,8 +443,9 @@ static int read_key(void)
         }
         //Read it
         if(nchars != 0) {
-            read(0, &ch, 1);
-            return ch;
+            if (read(0, &ch, 1) == 1)
+                return ch;
+            return 0;
         }else{
             return -1;
         }