The demuxer does not support CRC32 elements

[lu-zero]

here the broken vp9 sample.

Libav and mkvtoolnix have no problems in parsing it.

• Support CRC-32 on top level elements
• Implement a proper CRC handling

[lu-zero]

Problem investigated, the current demuxer does not know anything about CRC32 elements.

[lu-zero]

Now we can parse the files but we aren't checking the crc.

[FreezyLemon]

Since #108, CRC elements are read and verified for every master element. What's missing now is the "proper" CRC handling:

If a Master Element contains a CRC-32 Element that doesn't validate, then the EBML Reader MAY ignore all contained data except for Descendant Elements that contain their own valid CRC-32 Element.

<CONTACT>
    <CRC-32>c119a69b</CRC-32><!-- does not validate -->
    <NAME>
        <CRC-32>1f59ee2b</CRC-32><!-- does not validate -->
        <FIRST-NAME>invalid data</FIRST-NAME>
        <LAST-NAME>invalid data</LAST-NAME>
    </NAME>
    <ADDRESS>
        <CRC-32>df941cc9</CRC-32><!-- validates -->
        <STREET>valid data</STREET>
        <CITY>valid data</CITY>
    </ADDRESS>
</CONTACT>

In this case, the ADDRESS Element validates, so it MAY be used even though the rest of the CONTACT Element is invalid.

[Luni-4]

Modified @lu-zero list with @FreezyLemon update