| http://www.w3.org/ns/prov#value | - The VCL NAL units contain the data that represents the values of the samples in the video pictures 12 and are, therefore, necessary for decoding, and the non-VCL NAL units contain any associated additional information such as parameter sets, i.e. important header data that can apply to a large number of VCL NAL units, and supplemental enhancement information, such as timing information and other s
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