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feat(tracks): download and mux stereoscopic 3D (MV-HEVC) video to MP4

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Mark 3D from REQ-VIDEO-LAYOUT, DV profile 20 codecs or an lhvC box; mux with MP4Box, decrypt with mp4decrypt, skip FFmpeg repack, sample cut and hybrid; add {3d} and env MP4Box.
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imSp4rky
2026-11-12 04:47:18 -07:00
parent a28c99b811
commit e29a523907
31 changed files with 513 additions and 67 deletions
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docs/dev/service-architecture.md
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@@ -454,6 +454,7 @@ Two DV mechanisms sit on top of the track model. **DV fixup** re-exposes DV sign
HLS and DASH streams that carry a valid DV RPU but advertise plain HEVC, with DV only in the
supplemental codecs (`dv_compatible_bitstream`). `--list` shows such a track as `HDR10+DV` or `HDR10P+DV`.
A service sets `hdr10_base` on a DV track that has an HDR10 base layer (DV profile 8.1), and `--list` shows it as `DV+HDR10`.
The HLS and DASH parsers set `stereo` on a stereoscopic 3D (MV-HEVC) track: an HLS `REQ-VIDEO-LAYOUT` that names `CH-STEREO`, or a DV profile 20 codec. `--list` shows it as `3D`.
**Hybrid** processing (`Video.Range.HYBRID`) selects an HDR10(+) base and a DV donor,
extracts the RPU with `dovi_tool`, and injects it onto the base layer, to make a single
track that carries both HDR10 metadata and the DV RPU. Both are automatic once the