MSE: Recognize "unknown duration" in ISOBMFF mvhd version 0, duration max uint32 case

media/formats/mp4/box_definitions.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_FORMATS_MP4_BOX_DEFINITIONS_H_
 #define MEDIA_FORMATS_MP4_BOX_DEFINITIONS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 130 matching lines @@
   DECLARE_BOX_METHODS(ProtectionSchemeInfo);
 
   OriginalFormat format;
   SchemeType type;
   SchemeInfo info;
 };
 
 struct MEDIA_EXPORT MovieHeader : Box {
   DECLARE_BOX_METHODS(MovieHeader);
 
+  uint8_t version;
   uint64_t creation_time;
   uint64_t modification_time;
   uint32_t timescale;
   uint64_t duration;
   int32_t rate;
   int16_t volume;
   uint32_t next_track_id;
 };
 
 struct MEDIA_EXPORT TrackHeader : Box {
@@ skipping 316 matching lines @@
   std::vector<TrackFragment> tracks;
   std::vector<ProtectionSystemSpecificHeader> pssh;
 };
 
 #undef DECLARE_BOX
 
 }  // namespace mp4
 }  // namespace media
 
 #endif  // MEDIA_FORMATS_MP4_BOX_DEFINITIONS_H_