Overview
IEC TS 62871-2:2019 - "Professional video storage products - Tape-less camera recorder using MXF file format - Encoding guidelines - Part 2: Mapping MPEG-2 and AVC Streams into MXF" - provides implementation guidance for embedding MPEG-2 and AVC (H.264) video streams into the Material eXchange Format (MXF) used by professional tape-less camera recorders. The Technical Specification focuses on ensuring interoperable MXF files for recording, playback, editing and content management across broadcast and production workflows.
Key Topics
- Mapping MPEG-2 and AVC into MXF: Guidance follows SMPTE mapping practices to wrap MPEG-2 (ISO/IEC 13818-2) and AVC/H.264 (ISO/IEC 14496-10) streams into MXF containers so that professional recorders produce consistent, interoperable files.
- KLV wrapping and frame wrapping: Use of KLV (Key-Length-Value) wrapping and frame wrapping methods (per SMPTE ST 336 and related SMPTE ST 381-x) to enable AU-level (access unit) retrieval and frame-based access for editing and playback.
- Operational Patterns: Examples include MXF OP-1a and OP-1b usages for single-file and multi-essence mapping; considerations for OP-Atom are referenced in IEC TS 62871-1.
- Recommended constraints: Implementation constraints intended for tape-less camera recorders and MXF-supporting equipment/software, covering topics such as edit unit sizing, index table segmenting, codec constraints, and segment sizes for reliable indexing and random access.
- AVC-specific considerations: Placement and management of parameter sets (SPS/PPS), multi-slice encoding behavior, NAL unit occurrence conditions and how these affect stream mapping and MXF essence descriptors.
- Metadata and essence descriptors: Copying important video signalling (frame size, frame/field rate, pixel aspect) from the video stream into MXF descriptors to preserve playback and editing semantics.
Applications and Who Uses It
- Camera manufacturers: Implement MXF recording logic that wraps MPEG-2 and AVC streams reliably for broadcast use.
- Broadcast engineers & system integrators: Ensure equipment interoperability across ingest, playout and archive systems.
- NLE and MAM developers: Support MXF files produced by tape-less recorders for accurate frame extraction, indexing and metadata handling.
- Post-production & archiving workflows: Enable predictable editing, automated QC and long-term storage compatibility.
Related Standards
- SMPTE ST 377-1 (MXF file format)
- SMPTE ST 381-2 (Mapping MPEG Streams into MXF)
- SMPTE ST 381-3 (Mapping AVC Streams into MXF)
- ISO/IEC 13818-2 (MPEG-2 video)
- ISO/IEC 14496-10 (AVC/H.264)
- IEC TS 62871-1 and IEC TR 62712 (related MXF and tape-less recorder guidance)
This specification is essential for anyone designing or integrating file-based camera recording systems, MXF-capable equipment, or media asset management tools that require consistent, interoperable MXF files with MPEG-2 or AVC video.