1. 24 Jan, 2014 1 commit
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  4. 14 Dec, 2013 1 commit
    • Matej's avatar
      h264parser: not all startcodes should have 3-byte 0 prefix · 6af387cd
      Matej authored
      The parser assumes that every time there is a 0 before the startcode,
      it is part of the startcode. But that's not true.
      
      From the specification
      
      Byte stream NAL unit syntax
      zero_byte is a single byte equal to 0x00.
        When any of the following conditions are fulfilled, the zero_byte syntax
        element shall be present.
        – the nal_unit_type within the nal_unit( ) is equal to 7 (sequence parameter
          set) or 8 (picture parameter set)
        – the byte stream NAL unit syntax structure contains the first NAL unit of an
          access unit in decoding order, as specified by subclause 7.4.1.2.3.
      
      The problem with doing this for all startcodes is that a trailing zero can mess
      up timestamps. The trailing zero gets prepended to the startcode, which will
      carry the PTS and DTS of previous buffer.
      
      https://bugzilla.gnome.org/show_bug.cgi?id=664443
      6af387cd
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    • René Stadler's avatar
      h264parser: fix access to uninitialized memory · fd4eb2e2
      René Stadler authored
      When vui->timing_info_present is 0, vui->fixed_frame_rate_flag and others
      cannot be accessed since they have not been set.
      
      It was also possible that sps->fps_{num,den} end up initialized here.
      fd4eb2e2