st377-1 0.3.0

SMPTE ST 377-1:2019 Material Exchange Format (MXF) file format — KLV framing, Partition Pack, Primer Pack, local-set structural metadata (Preface/Identification/ContentStorage/EssenceContainerData), OP1a structural metadata (Material/Source Package, Tracks, Sequence, SourceClip, TimecodeComponent, FillerComponent), Random Index Pack. no_std.