[aagedal]

Summary

• Skip MXF essence via the partition index. The KLV walk used to visit every essence KLV (~10 per frame in frame-wrapped XAVC/XDCAM), issuing small reads across the whole file. It now uses the Random Index Pack (or the footer's PreviousPartition chain) to jump from a partition's first essence KLV to the next partition. Essence KLVs are no longer peeked, and the NRT/ARRI fallback scan is bounded to the header metadata. Files without a valid partition index keep the full walk.
  • 16 GB Sony FX9 XAVC clip: 7.5 s → 0.02 s on SSD. Large MXFs in iCloud Drive: 14–86 s → ~0.2 s.
  • Fixes Aagedal Media Converter camera-card imports where probes missed the 15 s deadline on slow cards and clips showed "No video metadata".
• Report the MXF display rectangle. XAVC 1080p stores 1920x1088 (macroblock padding). Using StoredHeight gave 1088 and a 136:135 SAR; it now matches ffprobe (1920x1080, 1:1).
• Bump to 3.0.3 (CLI version, README, CHANGELOG, checklist).

Testing

• Scripts/verify-release.sh 3.0.3 passes locally (1677 library tests, 50 CLI tests, archive build).
• New tests: RIP-based skip, footer-chain skip without RIP, invalid-RIP fallback, display vs stored rectangle.
• Metadata output is identical to 3.0.2 for 63 local MXF files (Sony XAVC/XDCAM card clips, FX6, Avid, DJI, Premiere transcodes), apart from the 1080 fix. All 41 video MXFs match ffprobe width/height/SAR.

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