Skip to content

AlphaSub 1.5.1

Choose a tag to compare

View all tags
@cobaltfilms cobaltfilms released this 28 Jul 06:23
v1.5.1
ac70b97

AlphaSub 1.5.1 — Multi-reel DCP playback & reel authoring

A focused follow-up to 1.5.0: multi-reel DCPs now play their picture in real time, you can assemble or repair a composition's reel structure from loose MXF files, and the bundled ffmpeg is rebuilt without the X11/xcb/SDL autodetection that broke DCP extraction on 1.5.0.

Multi-reel DCP playback (Apple Silicon). The real-time Grok picture engine previously required a single reel — multi-reel DCPs loaded audio but no picture. DCPFrameSource now concatenates every reel's picture MXF into one timeline (per-reel content keys for encrypted packages), so multi-reel features play end to end without a transcode. Single-reel is the one-segment case of the same path.

DCP reel & asset editor (Pro). File ▸ Export ▸ DCP Authoring… ▸ Reels & Assets… (or Assemble Reels from MXFs… when no DCP is imported) opens a new sheet that builds or repairs a composition's reel graph without a source DCP folder:

  • Add reels from loose MXF track files — the bundled asdcp-info probes each file (essence kind, edit rate, duration, AssetUUID, encryption, language) and places the asset in its slot.
  • Edit an imported DCP's reel structure: swap an asset's file, split a reel at its midpoint, merge adjacent reels, reorder or remove reels. The source files on disk are never modified — the composition only records references.
  • Edits persist into the project, so a VF can be authored against an OV in a later session.

Bundled ffmpeg fix. The LGPL ffmpeg shipped in 1.5.0 pulled in libX11/libxcb/SDL2 via autodetection, which broke DCP audio extraction (and any ffmpeg invocation) on machines without X11. Rebuilt with --disable-xlib --disable-libxcb --disable-sdl2. MKV, MP4, MXF/DCP, WAV, HLS and all the encoders (ProRes, DNxHD, VideoToolbox H.264/HEVC, AAC, PCM) work without a Homebrew ffmpeg.

Also in 1.5.1

  • 41 new localized strings across fr/de/nl/es/pt/it for the reel editor.
  • New tests: MXFProbe (9, incl. end-to-end against the sample encrypted MXF), ReelEditor (18), ReelSegmentMap (5).

Requires macOS 14 or later. Apple Silicon recommended for real-time DCP playback; Intel Macs use the background viewing proxy (single-reel only).

Assets 4
Loading