diff --git a/lib/mp4_generic.cpp b/lib/mp4_generic.cpp
index 878b9280..ab7b81db 100644
--- a/lib/mp4_generic.cpp
+++ b/lib/mp4_generic.cpp
@@ -2778,6 +2778,7 @@ namespace MP4 {
     setFrameCount(1);
     setCompressorName("");
     setDepth(0x0018);
+    setInt16(0xFFFF, 76);//must be -1
   }
 
   void VisualSampleEntry::setCodec(const char * newCodec) {
diff --git a/src/output/output_progressive_mp4.cpp b/src/output/output_progressive_mp4.cpp
index 56300994..a230a223 100644
--- a/src/output/output_progressive_mp4.cpp
+++ b/src/output/output_progressive_mp4.cpp
@@ -439,8 +439,8 @@ namespace Mist {
           }
           break;
         }
-        if (byteEnd > size - 1) {
-          byteEnd = size - 1;
+        if (byteEnd > size) {
+          byteEnd = size;
         }
       }else{
         byteEnd = size;