MP4v2 v2.1.3

Changes since the MP4v2 v2.1.2 release:

• Cache previously determined sample file offset to address a performance issue when dealing with huge chunks.
• Fixed illegal array index when MP4Track::IsSyncSample() is called with an stss count of 0 (thanks @thales-nascimento).
• Fixed possible division by zero in mp4trackdump (thanks @10cksYiqiyinHangzhouTechnology).
  • https://nvd.nist.gov/vuln/detail/CVE-2023-1450
• Fixed possible division by zero in MP4Track::GetSampleFileOffset() (thanks @RichTrouble).
  • https://nvd.nist.gov/vuln/detail/CVE-2023-1451
• Fixed possible division by zero in MP4Track::ToMovieDuration().
• Fixed possible division by zero in MP4RtpHintTrack::WriteHint().
• Fixed possible heap buffer overflow in MP4GetVideoProfileLevel() (thanks @z1r00 and @byteboon).
  • https://nvd.nist.gov/vuln/detail/CVE-2023-29584