Root cause: MXF OP1a writes its index/duration only in the footer partition
on finalize, so a growing MXF has no footer and VLC/Premiere/ffmpeg-strict
refuse it ("Unable to open file on disk"). Separately the proxy job pointed
at a .mov S3 key that never existed (promotion worker watched a local empty
disk, not the SMB share), so stop -> instant proxy failure.
Fix: growing master is now MPEG-TS (H.264 high422 all-intra + AAC), which is
readable from the first PAT/PMT while still growing (verified mid-write decode).
hiresKey derives from the actual produced extension. Capture skips finalize for
growing recorders (leaves asset live for promotion). Promotion worker CIFS-
mounts the same growing_smb share before scanning; worker image gets cifs-utils
and worker-p4 runs privileged (local /growing bind removed). /live-path uses .ts.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Zac Gaetano
8a958046ef