<p>FFV1's specification defines several versions of FFV1, currently version 0, 1, and 3. Versions 3 and higher of FFV1 require storage of a "ConfigurationRecord" to initialize the decoding. This ConfigurationRecord is defined in the FFV1 specification draft at <a href="https://datatracker.ietf.org/doc/draft-niedermayer-cellar-ffv1/" class="uri">https://datatracker.ietf.org/doc/draft-niedermayer-cellar-ffv1/</a>. The ConfigurationRecord extends the sample description box ("moov", "trak", "mdia", "minf", "stbl", "stsd") with a "glbl" box which contains the ConfigurationRecord bitstream.</p>
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