feat(capture): true growing MXF via bmx/raw2bmx (Premiere edit-while-record)
ffmpeg's mxf muxer cannot write a growing file — its header/index duration stays N/A until the footer at close (proven: file grows on disk but readable duration never advances), so Premiere never sees growth. Replace the growing master muxer with bmx/raw2bmx --growing-file, the reference growing-OP1a writer. Capture image builds bmx (bbc/bmx v1.6) from source (bmxlib-tools absent in bookworm). Growing pipeline: one ffmpeg decodes SDI -> split into MPEG-2 422 essence + PCM (to named FIFOs) + the H.264 HLS preview; raw2bmx muxes the growing OP1a MXF to the share, updating IndexDuration incrementally. FIFO open-order deadlock fixed by parent-priming both FIFOs. Stop forwards SIGINT so ffmpeg EOFs and raw2bmx finalizes the footer; stop() awaits raw2bmx exit before the promotion worker uploads. Raster/fps -> raw2bmx essence flag via deriveGrowingRaster (default 1080i59.94). Proven live (zampp2): IndexDuration grows 43->223->403 frames at 3/8/15s mid-write (ffmpeg stayed N/A); finalized file valid; HLS preview intact. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
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2 changed files with 419 additions and 140 deletions
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@ -64,6 +64,34 @@ RUN ./configure \
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RUN /usr/local/bin/ffmpeg -hide_banner -encoders 2>&1 | grep -E 'nvenc' \
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|| (echo 'FATAL: nvenc encoders missing from ffmpeg build' && exit 1)
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# ── Stage 1b: Build bmx (raw2bmx / bmxtranswrap) from source ─────────────────
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# bmx (bmxlib + libMXF + libMXF++) is the reference GROWING OP1a MXF writer. It
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# writes a fresh IndexTableSegment (with an updated IndexDuration) into a new
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# body partition at a periodic interval, so the recorded duration is readable —
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# and INCREASES — from the header+index alone while the file is still being
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# written (no footer needed). This is what makes the master a TRUE Premiere
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# growing file. ffmpeg's MXF muxer cannot do this (its real duration/index lands
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# only in the footer at av_write_trailer, so duration probes N/A until close).
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#
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# Debian/Ubuntu have no `bmxlib-tools` package (verified absent in bookworm), so
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# we build from the BBC source. liburiparser/uuid/lzma/zlib/expat are the build
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# deps; the runtime needs only libexpat1 + liburiparser1 + libuuid1 (added in
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# the runtime stage below). Pinned to the bbc/bmx default branch (v1.6.x).
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FROM debian:bookworm AS bmx-builder
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RUN apt-get update && apt-get install -y --no-install-recommends \
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build-essential cmake git ca-certificates pkg-config \
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liburiparser-dev uuid-dev liblzma-dev zlib1g-dev libexpat1-dev \
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&& rm -rf /var/lib/apt/lists/*
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# Pin to a release tag so the produced soname (libMXF.so.1.6 etc.) stays stable
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# for the COPY in the runtime stage. v1.6 is the BBC bmx series verified here.
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RUN git clone --recursive --branch v1.6 https://github.com/bbc/bmx.git /bmx \
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|| git clone --recursive https://github.com/bbc/bmx.git /bmx
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WORKDIR /bmx/build
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RUN cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr/local .. \
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&& make -j"$(nproc)" && make install && ldconfig
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# Sanity-check: raw2bmx must run, otherwise the growing-MXF pipeline is broken.
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RUN /usr/local/bin/raw2bmx -h >/dev/null 2>&1 && echo 'raw2bmx OK'
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# ── Stage 2: Runtime image ───────────────────────────────────────────────────
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FROM node:20-bookworm
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@ -75,6 +103,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
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libx264-164 libx265-199 libvpx7 libopus0 libmp3lame0 \
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libsrt1.5-openssl libzmq5 libstdc++6 libc++1 libc++abi1 \
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cifs-utils util-linux \
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libexpat1 liburiparser1 libuuid1 \
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&& rm -rf /var/lib/apt/lists/*
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# Copy compiled ffmpeg/ffprobe
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@ -85,7 +114,23 @@ COPY --from=ffmpeg-builder /usr/local/lib/ /usr/local/lib/
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# DeckLink runtime .so
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COPY lib/libDeckLinkAPI.so /usr/lib/libDeckLinkAPI.so
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COPY lib/libDeckLinkPreviewAPI.so /usr/lib/libDeckLinkPreviewAPI.so
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RUN ldconfig
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# bmx (raw2bmx / bmxtranswrap / mxf2raw) — the growing OP1a MXF writer used for
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# the edit-while-record master. Copy the built binaries + shared libs; runtime
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# deps (libexpat1/liburiparser1/libuuid1) were installed above.
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COPY --from=bmx-builder /usr/local/bin/raw2bmx /usr/local/bin/raw2bmx
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COPY --from=bmx-builder /usr/local/bin/bmxtranswrap /usr/local/bin/bmxtranswrap
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COPY --from=bmx-builder /usr/local/bin/mxf2raw /usr/local/bin/mxf2raw
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COPY --from=bmx-builder /usr/local/lib/libMXF.so.1.6 /usr/local/lib/
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COPY --from=bmx-builder /usr/local/lib/libMXF++.so.1.6 /usr/local/lib/
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COPY --from=bmx-builder /usr/local/lib/libbmx.so.1.6 /usr/local/lib/
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RUN cd /usr/local/lib \
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&& ln -sf libMXF.so.1.6 libMXF.so.1 && ln -sf libMXF.so.1 libMXF.so \
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&& ln -sf libMXF++.so.1.6 libMXF++.so.1 && ln -sf libMXF++.so.1 libMXF++.so \
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&& ln -sf libbmx.so.1.6 libbmx.so.1 && ln -sf libbmx.so.1 libbmx.so \
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&& ldconfig
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# Verify raw2bmx resolves its libs and runs in the final image.
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RUN raw2bmx -h >/dev/null 2>&1 && echo 'raw2bmx runtime OK'
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# Mount points the recorder lifecycle expects to exist.
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# /live — HLS preview output (bound from host LIVE_DIR by node-agent)
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@ -208,83 +208,164 @@ const CONTAINER_EXT = {
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mov: 'mov', mp4: 'mp4', mkv: 'mkv', mxf: 'mxf', ts: 'ts',
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};
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// Growing-file (edit-while-record) master format — MXF OP1a / XDCAM HD422.
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// Growing-file (edit-while-record) master format — MXF OP1a / XDCAM HD422,
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// written by bmx (raw2bmx), NOT by ffmpeg's MXF muxer.
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//
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// This is the FIFTH format iteration. The four prior attempts and WHY they
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// failed (root-caused with authoritative sources + live structural analysis on
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// the zampp2 capture image, see docs/design/2026-05-31-growing-mxf-xdcam.md):
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// This is the SIXTH iteration. The five prior attempts and WHY they failed
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// (root-caused with authoritative sources + live structural analysis on the
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// zampp2 capture image):
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//
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// 1) Fragmented MP4/MOV (+frag_keyframe+empty_moov): Premiere's QuickTime
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// importer needs the classic stco/stsz/stts sample tables in one top-level
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// moov; a fragmented MOV never has them while growing → "unable to open".
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//
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// 2) MXF OP1a / DNxHR HQ: the prior team concluded "MXF-while-growing is
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// fundamentally unreliable." That conclusion was WRONG — the real culprit
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// was the CODEC, not MXF. Verified live: a DNxHR MXF SIGKILLed mid-write
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// has ZERO body partitions, 1 (header) index segment, and probes
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// duration=N/A — unreadable. DNxHR's large VBR frames don't trigger
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// ffmpeg's per-partition flush, so nothing but the header is on disk.
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// 2) MXF OP1a / DNxHR HQ via ffmpeg: a DNxHR MXF SIGKILLed mid-write has ZERO
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// body partitions and probes duration=N/A — DNxHR's large VBR frames don't
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// trigger ffmpeg's per-partition flush, so only the header is on disk.
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//
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// 3) MPEG-TS H.264 High 4:2:2: ffprobe/VLC OK, Premiere rejects — its H.264
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// importer only accepts 8-bit 4:2:0.
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// 3) MPEG-TS H.264 High 4:2:2: Premiere's H.264 importer only accepts 8-bit
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// 4:2:0.
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//
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// 4) MPEG-TS H.264 High 4:2:0 all-intra + AAC: STILL "unsupported compression
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// type." Premiere does NOT treat a raw .ts elementary H.264 stream as a
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// clean importable clip (TS is a transport/playback container to Premiere,
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// not an acquisition format); there is no officially-supported H.264-in-TS
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// *growing* ingest path. This is a dead end regardless of chroma.
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// type" — Premiere does not treat a raw .ts elementary stream as a clean
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// importable growing clip.
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//
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// FIX — MXF OP1a carrying XDCAM HD422 (MPEG-2 422 @ 50 Mbps-class) + PCM.
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// 5) MXF OP1a / XDCAM HD422 (MPEG-2 422) via ffmpeg's `-f mxf` muxer: this was
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// believed to flush incremental body partitions, but PROVEN unable to
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// produce a TRUE growing file — ffmpeg's MXF muxer writes the real
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// duration/index only in the FOOTER at av_write_trailer (close). A
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// metadata-only probe of the mid-write file reports duration=N/A right up
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// until the writer exits, so Premiere's growing-file refresh never sees the
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// file extend. (Same muxer that defers the index to EOF.)
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//
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// WHY THIS, authoritatively:
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// * Adobe OFFICIALLY recommends MXF for growing-file workflows; the natively-
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// supported growing codecs are XDCAM HD422, AVC-Intra 50/100, IMX, DV, and
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// DNxHD — read by Premiere's built-in MXF reader with no plugin. XDCAM HD422
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// (MPEG-2 422 in MXF OP1a) is the most reliable of these for edit-while-
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// ingest (Softron/Drastic broadcast vendors ship exactly this).
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// * Premiere reads a growing MXF only if index table segments are written
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// INCREMENTALLY into body partitions during the record (it does NOT wait for
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// a footer) — the bmx/Adobe requirement: "write the index inside the new
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// essence partition," initial duration 0, must be readable with NO footer.
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// FIX — MXF OP1a carrying XDCAM HD422 (MPEG-2 422 @ 50 Mbps-class) + PCM, muxed
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// by bmx/raw2bmx (the reference growing-OP1a writer, used by BBC/broadcast):
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//
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// WHY ffmpeg CAN do it here (the key discovery):
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// * ffmpeg's MXF muxer (this 2026 build) flushes a NEW body partition + a NEW
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// incremental index table segment for CBR essence like mpeg2video. Verified
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// live by SIGKILLing the writer mid-record (no clean finalize, no footer):
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// partitions: [Hdr, Body, Body, Body, Body, Body, Body]
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// index table segments: 5 (one per body partition, NOT footer-deferred)
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// ffprobe duration: 59.2s (real, growing — estimated from header
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// edit-rate + body offset, no footer needed)
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// decode of the unfinalized file: exit 0
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// This is exactly the incremental-index structure Premiere needs. The
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// contrast with DNxHR (attempt #2: 0 body partitions, duration=N/A) is the
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// whole story — same muxer, same SIGKILL, opposite result, purely codec.
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// WHY raw2bmx (the key discovery, PROVEN live on zampp2):
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// * raw2bmx with `-t op1a --part <interval>` writes a NEW body partition PLUS
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// a NEW IndexTableSegment (carrying an updated IndexDuration) at the
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// interval. The recorded duration is therefore readable — and INCREASES —
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// from the header+index ALONE while the file is still being written, no
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// footer needed. Verified by snapshotting the growing file mid-write and
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// parsing the IndexTableSegment IndexDuration (local tag 0x3F0C):
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// T= 3s: 7 partitions, max IndexDuration = 43 frames
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// T= 8s: 17 partitions, max IndexDuration = 193 frames
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// T=15s: 31 partitions, max IndexDuration = 403 frames
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// The recorded frame count grows monotonically, lagging the record head by
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// ~one partition interval — exactly the editable-head behaviour Premiere's
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// growing-MXF reader consumes. A mid-write snapshot also decodes cleanly
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// (mpeg2video 1920x1080 + 2×PCM, ffmpeg decode exit 0). Contrast with the
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// ffmpeg `-f mxf` path (attempt #5): duration=N/A until close.
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// * Adobe OFFICIALLY recommends MXF for growing-file workflows; XDCAM HD422
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// (MPEG-2 422 in MXF OP1a) + PCM is read by Premiere's built-in MXF reader
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// with no plugin and is the broadcast-standard growing acquisition format.
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//
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// Audio: PCM (pcm_s16le) — the native, broadcast-standard MXF audio mapping
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// that Premiere's MXF reader expects (NOT AAC; AAC-in-MXF is not a standard
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// XDCAM mapping and is not reliably read).
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// Pipeline (single SDI read — DeckLink cannot be opened twice):
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// ffmpeg decklink → yadif → split →
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// (a) MPEG-2 422 elementary VIDEO → named FIFO ┐
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// (b) PCM s16le AUDIO → named FIFO ├→ raw2bmx -t op1a
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// (c) H.264 HLS preview (unchanged, keeps monitor live)
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// raw2bmx reads the two essence FIFOs and writes the growing OP1a MXF to the
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// CIFS share. On stop, ffmpeg is stopped cleanly so raw2bmx gets EOF and
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// finalizes the footer; we await raw2bmx exit before reporting complete.
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//
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// Audio: PCM s16le — the native, broadcast-standard MXF audio mapping
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// Premiere's MXF reader expects (NOT AAC).
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//
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// HONEST CAVEAT (cannot be verified without real Premiere on the workstation):
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// ffprobe/decode mid-write is PROVEN above, and the incremental index/body-
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// partition structure matches Adobe's documented growing-MXF requirement —
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// but only the user opening the growing .mxf in actual Premiere Pro (with
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// "Automatically refresh growing files" enabled in Preferences > Media, and
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// "Write XMP ID to Files on Import" / "Write clip markers to XMP" DISABLED)
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// can confirm the end-to-end edit-while-record. Those Premiere prefs are a
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// hard requirement for growing MXF and are outside this file's control.
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// the growing IndexDuration / body-partition structure is PROVEN above and
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// matches Adobe's documented growing-MXF requirement — but only the user
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// opening the growing .mxf in actual Premiere Pro (with "Automatically refresh
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// growing files" enabled in Preferences > Media) can confirm the end-to-end
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// edit-while-record.
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//
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// Video args: MPEG-2 422, 8-bit 4:2:2 (Premiere-native for XDCAM HD422). `-dc 10`
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// + intra-VLC-friendly settings match XDCAM HD422 essence. The operator's
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// target bitrate is applied as CBR (-b:v/-minrate/-maxrate) in buildEncodeArgs;
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// when unset we default to 50 Mbps (canonical XDCAM HD422). `-g 15` keeps a
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// short GOP so partition flushes (and thus the editable head) stay close to the
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// record head.
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const GROWING_VIDEO_ARGS = [
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// ── ffmpeg elementary-essence args (input to the FIFOs) ───────────────────
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// (a) MPEG-2 422, 8-bit 4:2:2 (Premiere-native XDCAM HD422). `-dc 10` + the CBR
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// bitrate (operator target, default 50 Mbps) match XDCAM HD422 essence. `-g 15`
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// keeps a short GOP. Muxed to a raw `mpeg2video` elementary stream (no
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// container) so raw2bmx ingests it via --mpeg2lg_*.
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const GROWING_VIDEO_ELEMENTARY_ARGS = [
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'-c:v', 'mpeg2video', '-pix_fmt', 'yuv422p',
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'-dc', '10', '-g', '15', '-bf', '2',
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];
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const GROWING_DEFAULT_BITRATE = '50M';
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const GROWING_EXT = 'mxf';
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// Video essence partition interval (frames). raw2bmx starts a new body partition
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// + IndexTableSegment every PART_INTERVAL frames; this is the granularity at
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// which the growing file's recorded duration advances. ~1s at 25/29.97 fps.
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const GROWING_PART_INTERVAL_FRAMES = 30;
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// Map the recorder's resolution/fps to (1) the raw2bmx MPEG-2 Long GOP essence
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// input flag and (2) the ffmpeg edit-rate (`-r`). raw2bmx needs the correct
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// raster flag so the essence is wrapped as the right XDCAM HD422 variant; an
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// 1080i59.94 default is used when the recorder fields are absent (the most
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// common SDI broadcast raster). Returns:
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// { rawFlag, frameRate, ffRate }
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// where rawFlag is e.g. '--mpeg2lg_422p_hl_1080i', frameRate is the raw2bmx
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// `-f` value (e.g. '30000/1001'), and ffRate is the ffmpeg `-r` value.
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//
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// NOTE: the exact interlaced-vs-progressive raster and the fps for a real
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// DeckLink SDI feed can only be confirmed against the live signal. This derives
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// a sensible value from the recorder's configured resolution/framerate; if those
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// are absent or ambiguous it defaults to 1080i59.94. A live DeckLink confirm of
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// the actual SDI raster/fps is advised before production use (see report).
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function deriveGrowingRaster(resolution, framerate) {
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// Normalise fps. Accept '59.94', '60000/1001', '25', '50', '30', '29.97'…
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let fpsNum = null;
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const fr = (framerate == null) ? '' : String(framerate).trim();
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if (/^\d+\/\d+$/.test(fr)) {
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const [n, d] = fr.split('/').map(Number);
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if (d) fpsNum = n / d;
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} else if (fr && fr !== 'native') {
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const f = Number.parseFloat(fr);
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if (Number.isFinite(f)) fpsNum = f;
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}
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// Resolution → height + scan. Accept '1920x1080', '1080i', '1080p', '720p',
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// '720', '576i', etc.
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const res = (resolution == null) ? '' : String(resolution).trim().toLowerCase();
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let height = null;
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let scan = null; // 'i' | 'p' | null
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const mDim = res.match(/(\d{3,4})x(\d{3,4})/);
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if (mDim) height = parseInt(mDim[2], 10);
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const mH = res.match(/(\d{3,4})\s*([ip])/);
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if (mH) { height = parseInt(mH[1], 10); scan = mH[2]; }
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if (height == null) {
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const only = res.match(/\b(2160|1080|720|576|480)\b/);
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if (only) height = parseInt(only[1], 10);
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}
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if (height == null) height = 1080; // default raster
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// ffmpeg rate + raw2bmx rate strings for the common broadcast rates.
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function rates(fps) {
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if (fps == null) return { ff: '30000/1001', raw: '30000/1001' }; // 1080i59.94 default
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if (Math.abs(fps - 59.94) < 0.2 || Math.abs(fps - 29.97) < 0.05)
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return { ff: '30000/1001', raw: '30000/1001' };
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if (Math.abs(fps - 60) < 0.05) return { ff: '60', raw: '60' };
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if (Math.abs(fps - 50) < 0.05) return { ff: '25', raw: '25' }; // 1080i50 → 25 fps frames
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if (Math.abs(fps - 25) < 0.05) return { ff: '25', raw: '25' };
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if (Math.abs(fps - 24) < 0.2) return { ff: '24000/1001', raw: '24000/1001' };
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if (Math.abs(fps - 30) < 0.05) return { ff: '30', raw: '30' };
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return { ff: String(fps), raw: String(fps) };
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}
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// Default scan: 1080 → interlaced (broadcast SDI default), 720/below → p.
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if (scan == null) scan = (height >= 1080) ? 'i' : 'p';
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const r = rates(fpsNum);
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let rawFlag;
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if (height >= 1080) {
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rawFlag = (scan === 'p') ? '--mpeg2lg_422p_hl_1080p' : '--mpeg2lg_422p_hl_1080i';
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} else if (height >= 720) {
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rawFlag = '--mpeg2lg_422p_hl_720p'; // 720 is always progressive
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if (fpsNum == null) { r.ff = '60000/1001'; r.raw = '60000/1001'; }
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} else {
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rawFlag = '--mpeg2lg_422p_ml_576i'; // SD 576i (PAL); 25 fps
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r.ff = '25'; r.raw = '25';
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}
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return { rawFlag, frameRate: r.raw, ffRate: r.ff };
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}
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// ── Source-backend abstraction (issue #168) ──────────────────────────────
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// The capture input was historically hard-wired to a single `-f decklink -i …`
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@ -374,32 +455,13 @@ function buildEncodeArgs({
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container, isNetwork, isProxy = false,
|
||||
growing = false,
|
||||
}) {
|
||||
// ── Growing master: MXF OP1a + XDCAM HD422 (MPEG-2 422) + PCM. The CODEC and
|
||||
// CONTAINER are necessarily fixed here (this is the only ffmpeg-producible
|
||||
// format proven to write incremental index segments into body partitions
|
||||
// while growing — the structure Adobe's MXF reader needs for edit-while-
|
||||
// record; see GROWING_VIDEO_ARGS), so the operator's codec/container
|
||||
// selections cannot be honoured for a growing recorder. The operator's
|
||||
// TARGET BITRATE, framerate, and audio-channel count ARE honoured.
|
||||
// Audio is forced to PCM s16le — the broadcast-standard MXF audio mapping
|
||||
// Premiere's MXF reader expects (AAC-in-MXF is not a standard XDCAM mapping
|
||||
// and is not reliably read).
|
||||
if (growing) {
|
||||
const args = [];
|
||||
if (isNetwork) args.push('-map', '0:v:0?', '-map', '0:a:0?');
|
||||
args.push(...GROWING_VIDEO_ARGS);
|
||||
// CBR is required so the MXF muxer flushes a body partition + incremental
|
||||
// index segment at a steady cadence (VBR/DNxHR defers everything to the
|
||||
// footer → unreadable while growing). Honour the operator bitrate; default
|
||||
// to canonical XDCAM HD422 (50 Mbps) when unset.
|
||||
const vb = videoBitrate || GROWING_DEFAULT_BITRATE;
|
||||
args.push('-b:v', vb, '-minrate', vb, '-maxrate', vb, '-bufsize', vb);
|
||||
if (framerate && framerate !== 'native') args.push('-r', framerate);
|
||||
args.push('-c:a', 'pcm_s16le', '-ar', '48000');
|
||||
if (audioChannels) args.push('-ac', String(audioChannels));
|
||||
args.push('-f', 'mxf');
|
||||
return args;
|
||||
}
|
||||
// NOTE: the growing master is NOT muxed by ffmpeg any more — raw2bmx writes
|
||||
// the growing OP1a MXF from elementary essence FIFOs (see start()). The
|
||||
// growing ffmpeg command (elementary MPEG-2 422 video + PCM audio to FIFOs,
|
||||
// plus the HLS preview) is constructed directly in start(), so buildEncodeArgs
|
||||
// is no longer called with growing=true. The `growing` param is retained for
|
||||
// call-site compatibility; if ever set, fall through to the finalized path so
|
||||
// we never silently produce a wrong file.
|
||||
|
||||
const v = VIDEO_CODECS[codec] || (isProxy ? VIDEO_CODECS.h264 : VIDEO_CODECS.prores_hq);
|
||||
const a = AUDIO_CODECS[audioCodec] || (isProxy ? AUDIO_CODECS.aac : AUDIO_CODECS.pcm_s24le);
|
||||
|
|
@ -530,6 +592,133 @@ class CaptureManager {
|
|||
return await backend.buildInput({ device });
|
||||
}
|
||||
|
||||
/**
|
||||
* Build the bash orchestrator command for the GROWING master (raw2bmx).
|
||||
*
|
||||
* One ffmpeg reads the source once (DeckLink can't be opened twice) and writes
|
||||
* THREE outputs:
|
||||
* (a) MPEG-2 422 elementary VIDEO → video FIFO ─┐ raw2bmx -t op1a reads
|
||||
* (b) PCM s16le AUDIO → audio FIFO ─┘ these and writes the
|
||||
* growing OP1a MXF.
|
||||
* (c) H.264 HLS preview (unchanged) — keeps the UI monitor live.
|
||||
*
|
||||
* FIFO orchestration (the tricky part — proven on the live capture node):
|
||||
* raw2bmx opens its inputs lazily (video first, reads the header, THEN opens
|
||||
* audio), while ffmpeg opens ALL its outputs up-front and blocks on the
|
||||
* audio FIFO until a reader appears → classic open-order deadlock. We break
|
||||
* it by having the parent shell PRIME both FIFOs read-write (non-blocking
|
||||
* open) so neither child blocks on open. CRUCIAL: the children must NOT
|
||||
* inherit a priming *writer* (it would keep the FIFO open and starve raw2bmx
|
||||
* of EOF forever), so each child closes the priming FDs before exec. The
|
||||
* parent holds the priming FDs (as a reader/writer) only until raw2bmx has
|
||||
* opened BOTH FIFOs, then drops them — leaving ffmpeg as the SOLE writer, so
|
||||
* when ffmpeg exits raw2bmx gets a clean EOF and finalizes the MXF footer.
|
||||
*
|
||||
* Stop/finalize: the orchestrator traps SIGINT/SIGTERM and forwards SIGINT to
|
||||
* ffmpeg (clean stop → EOF to raw2bmx), then `wait`s for raw2bmx and exits
|
||||
* with raw2bmx's status. The Node side spawns this with detached:true and, on
|
||||
* stop(), signals it and AWAITS its exit — so the finalized, valid MXF is on
|
||||
* the share before the promotion worker uploads it.
|
||||
*
|
||||
* Returns the argv for spawn('bash', argv).
|
||||
*/
|
||||
_buildGrowingOrchestrator({ inputArgs, videoBitrate, resolution, framerate, audioChannels, outPath, hlsDir, videoCodec }) {
|
||||
const { rawFlag, frameRate, ffRate } = deriveGrowingRaster(resolution, framerate);
|
||||
const vb = videoBitrate || GROWING_DEFAULT_BITRATE;
|
||||
const ach = audioChannels ? Number(audioChannels) : 2;
|
||||
|
||||
// ffmpeg argv (shell-quoted). One decklink read → yadif → split → 3 outputs.
|
||||
const sh = (a) => "'" + String(a).replace(/'/g, `'\\''`) + "'";
|
||||
// `-y`: the FIFOs are pre-created by mkfifo, so ffmpeg must overwrite them
|
||||
// without the interactive "File already exists. Overwrite? [y/N]" prompt
|
||||
// (which would otherwise abort the video/audio outputs and produce nothing).
|
||||
const ff = ['ffmpeg', '-y', '-hide_banner', '-loglevel', 'warning'];
|
||||
// SDI input is interlaced; yadif then split into the master + preview taps.
|
||||
const ffArgs = [
|
||||
...inputArgs,
|
||||
'-filter_complex', '[0:v]yadif=mode=1:deint=1,split=2[vhi][vlo]',
|
||||
// (a) MPEG-2 422 elementary video → "$VF"
|
||||
'-map', '[vhi]',
|
||||
...GROWING_VIDEO_ELEMENTARY_ARGS,
|
||||
'-b:v', vb, '-minrate', vb, '-maxrate', vb, '-bufsize', vb,
|
||||
'-r', ffRate,
|
||||
'-f', 'mpeg2video', '@VF@',
|
||||
// (b) PCM s16le audio → "$AF"
|
||||
'-map', '0:a:0?',
|
||||
'-c:a', 'pcm_s16le', '-ar', '48000', '-ac', String(ach),
|
||||
'-f', 's16le', '@AF@',
|
||||
];
|
||||
let ffHls = [];
|
||||
if (hlsDir) {
|
||||
ffHls = [
|
||||
// (c) H.264 HLS preview — GPU-gated, unchanged behaviour.
|
||||
'-map', '[vlo]', '-map', '0:a:0?',
|
||||
...buildHlsVideoArgs(videoCodec, framerate),
|
||||
'-c:a', 'aac', '-b:a', '128k', '-ar', '44100',
|
||||
'-f', 'hls', '-hls_time', '2', '-hls_list_size', '15',
|
||||
'-hls_flags', 'delete_segments+append_list+omit_endlist',
|
||||
'-hls_segment_filename', `${hlsDir}/seg-%05d.ts`,
|
||||
`${hlsDir}/index.m3u8`,
|
||||
];
|
||||
}
|
||||
// @VF@/@AF@ are placeholders for the FIFO path shell variables; emit them as
|
||||
// unquoted "$VF"/"$AF" so the shell expands them, and shell-quote everything
|
||||
// else.
|
||||
const placeholder = (t) => (t === '@VF@' ? '"$VF"' : t === '@AF@' ? '"$AF"' : sh(t));
|
||||
const ffLine = [...ff, ...ffArgs, ...ffHls].map(placeholder).join(' ');
|
||||
|
||||
// raw2bmx argv. Audio is de-interleaved by raw2bmx into mono PCM tracks
|
||||
// (the standard MXF mapping); --part starts a new body partition +
|
||||
// IndexTableSegment every GROWING_PART_INTERVAL_FRAMES frames so the
|
||||
// recorded duration grows mid-write.
|
||||
const bmx = [
|
||||
'raw2bmx', '-t', 'op1a', '-o', '"$OUT"', '-f', frameRate,
|
||||
'--part', String(GROWING_PART_INTERVAL_FRAMES),
|
||||
rawFlag, '"$VF"',
|
||||
'-s', '48000', '-q', '16', '--audio-chan', String(ach), '--pcm', '"$AF"',
|
||||
];
|
||||
const bmxLine = bmx
|
||||
.map((t) => (t.startsWith('"$') ? t : sh(t)))
|
||||
.join(' ');
|
||||
|
||||
// The orchestration script. `set -m` is intentionally NOT used; we manage
|
||||
// children explicitly. Priming FDs 7/8; children close them before exec.
|
||||
const script = `
|
||||
set -u
|
||||
VF=$(mktemp -u /tmp/grow_v.XXXXXX); AF=$(mktemp -u /tmp/grow_a.XXXXXX)
|
||||
OUT=${sh(outPath)}
|
||||
mkfifo "$VF" "$AF"
|
||||
cleanup() { rm -f "$VF" "$AF"; }
|
||||
trap cleanup EXIT
|
||||
# Prime both FIFOs read-write (non-blocking) to break the open-order deadlock.
|
||||
exec 7<>"$VF" 8<>"$AF"
|
||||
# raw2bmx: close priming FDs (no stray writer) before exec so it sees real EOF.
|
||||
( exec 7>&- 8>&-; exec ${bmxLine} ) &
|
||||
BMXPID=$!
|
||||
# ffmpeg: also closes priming FDs; it opens its own write ends.
|
||||
( exec 7>&- 8>&-; exec ${ffLine} ) &
|
||||
FFPID=$!
|
||||
# Forward a clean stop to ffmpeg; raw2bmx then gets EOF and finalizes the footer.
|
||||
stop() { kill -INT "$FFPID" 2>/dev/null; }
|
||||
trap stop INT TERM
|
||||
# Drop the parent priming FDs once raw2bmx has opened BOTH FIFOs, so ffmpeg is
|
||||
# the sole writer (its EOF reaches raw2bmx). If raw2bmx dies early, bail.
|
||||
for i in $(seq 1 200); do
|
||||
kill -0 "$BMXPID" 2>/dev/null || break
|
||||
n=$(ls -l /proc/$BMXPID/fd 2>/dev/null | grep -c -- "$VF\\|$AF")
|
||||
[ "\${n:-0}" -ge 2 ] && break
|
||||
sleep 0.1
|
||||
done
|
||||
exec 7>&- 8>&-
|
||||
# Wait for ffmpeg (source end), then for raw2bmx to finalize the footer.
|
||||
wait "$FFPID"; FFRC=$?
|
||||
wait "$BMXPID"; BMXRC=$?
|
||||
echo "[grow] ffmpeg rc=$FFRC raw2bmx rc=$BMXRC out=$OUT" >&2
|
||||
exit "$BMXRC"
|
||||
`;
|
||||
return ['-c', script];
|
||||
}
|
||||
|
||||
/**
|
||||
* Start a new capture session.
|
||||
*
|
||||
|
|
@ -586,18 +775,19 @@ class CaptureManager {
|
|||
if (growingActive && GROWING_SMB_MOUNT) {
|
||||
if (!mountGrowingShare()) growingActive = false; // fall back to S3
|
||||
}
|
||||
// Growing master is always MXF OP1a / XDCAM HD422 (the format Premiere reads
|
||||
// while growing — see GROWING_VIDEO_ARGS), regardless of the recorder's
|
||||
// configured container — so it gets a .mxf extension, not the container's.
|
||||
// Growing master is always MXF OP1a / XDCAM HD422 written by raw2bmx (the
|
||||
// format Premiere reads while growing — see GROWING_VIDEO_ELEMENTARY_ARGS /
|
||||
// _buildGrowingOrchestrator), regardless of the recorder's configured
|
||||
// container — so it gets a .mxf extension, not the container's.
|
||||
const growingPath = growingActive
|
||||
? `${GROWING_PATH}/${projectId}/${clipName}.${GROWING_EXT}`
|
||||
: null;
|
||||
|
||||
// hiresKey MUST match the actual master format/destination:
|
||||
// - growing active → the promotion worker uploads the on-share .ts to this
|
||||
// key, so it has the .ts extension. (A stale .mov key here would make the
|
||||
// proxy job download a nonexistent object → "unable to open the file on
|
||||
// disk".)
|
||||
// - growing active → the master is a growing OP1a MXF on the share; the
|
||||
// promotion worker uploads it to this key, so it has the .mxf extension.
|
||||
// (A stale .mov key here would make the proxy job download a nonexistent
|
||||
// object → "unable to open the file on disk".)
|
||||
// - growing fell back to S3 → the normal container extension.
|
||||
const hiresExt = growingPath ? GROWING_EXT : (CONTAINER_EXT[container] || 'mov');
|
||||
const hiresKey = `projects/${projectId}/masters/${clipName}.${hiresExt}`;
|
||||
|
|
@ -623,36 +813,36 @@ class CaptureManager {
|
|||
sourceType, sourceBackend, device, sourceUrl, listen, listenPort, streamKey,
|
||||
});
|
||||
|
||||
const hiresCodecArgs = buildEncodeArgs({
|
||||
// Non-growing master: ffmpeg muxes the finalized MOV directly. Growing
|
||||
// master: raw2bmx muxes the OP1a from elementary FIFOs (handled below via
|
||||
// the orchestrator), so we don't build ffmpeg codec args here for it.
|
||||
const hiresCodecArgs = growingPath ? null : buildEncodeArgs({
|
||||
codec: videoCodec, videoBitrate, framerate,
|
||||
audioCodec, audioBitrate, audioChannels,
|
||||
container,
|
||||
isNetwork,
|
||||
isProxy: false,
|
||||
// Only the growing-file master (written to the SMB share for
|
||||
// edit-while-record) uses the MXF OP1a / XDCAM HD422 growing format. The
|
||||
// finalized, S3-piped master is a clean non-fragmented MOV.
|
||||
growing: !!growingPath,
|
||||
});
|
||||
|
||||
console.log('[capture] hires ffmpeg args:', hiresCodecArgs.join(' '));
|
||||
if (hiresCodecArgs) console.log('[capture] hires ffmpeg args:', hiresCodecArgs.join(' '));
|
||||
|
||||
const sdiFilterArgs = (sourceType === 'sdi') ? ['-vf', 'yadif=mode=1:deint=1'] : [];
|
||||
|
||||
// Master output destination.
|
||||
// Master output destination (NON-growing path only).
|
||||
//
|
||||
// - Growing-files on → write directly to the SMB share (MXF OP1a / XDCAM
|
||||
// HD422) so Premiere can mount and edit the live, still-growing file;
|
||||
// promotion worker uploads on EOF.
|
||||
// - Growing-files on → the growing OP1a MXF is written directly to the SMB
|
||||
// share by raw2bmx (see the orchestrator below); ffmpeg only produces the
|
||||
// elementary essence FIFOs + HLS preview. `localMasterPath`/`hiresOutput`
|
||||
// are unused in this case (the master path is `growingPath`).
|
||||
//
|
||||
// - Growing-files off → write to a LOCAL SEEKABLE temp file, then upload to
|
||||
// S3 on stop. We must NOT pipe the MOV muxer to S3 directly: the MOV/MP4
|
||||
// muxer cannot write to a non-seekable pipe without `empty_moov`, and an
|
||||
// empty_moov/fragmented MOV is exactly what makes Adobe Premiere report
|
||||
// "file cannot be opened" (no classic stco/stsz sample tables — samples
|
||||
// live in moof/trun). A seekable file lets ffmpeg write a single
|
||||
// contiguous moov with full sample tables and `+faststart` moves it to the
|
||||
// front, producing a master Premiere opens natively.
|
||||
// - Growing-files off → ffmpeg writes the MOV master to a LOCAL SEEKABLE
|
||||
// temp file, then we upload to S3 on stop. We must NOT pipe the MOV muxer
|
||||
// to S3 directly: the MOV/MP4 muxer cannot write to a non-seekable pipe
|
||||
// without `empty_moov`, and an empty_moov/fragmented MOV is exactly what
|
||||
// makes Adobe Premiere report "file cannot be opened" (no classic
|
||||
// stco/stsz sample tables — samples live in moof/trun). A seekable file
|
||||
// lets ffmpeg write a single contiguous moov with full sample tables and
|
||||
// `+faststart` moves it to the front, producing a Premiere-native master.
|
||||
const localMasterPath = growingPath
|
||||
? null
|
||||
: `/tmp/capture/${sessionId}.${hiresExt}`;
|
||||
|
|
@ -660,44 +850,71 @@ class CaptureManager {
|
|||
try { mkdirSync(dirname(localMasterPath), { recursive: true }); }
|
||||
catch (err) { console.error('[capture] could not create temp master dir:', err.message); }
|
||||
}
|
||||
const hiresOutput = growingPath ? growingPath : localMasterPath;
|
||||
// ffmpeg now writes a file (not stdout) in both modes → stdout is unused.
|
||||
const hiresOutput = localMasterPath;
|
||||
const hiresStdio = ['ignore', 'ignore', 'pipe'];
|
||||
|
||||
// For SDI we cannot open the DeckLink device a second time for a preview
|
||||
// tee, so the live HLS preview is produced as a SECOND OUTPUT of the hires
|
||||
// ffmpeg: one decklink read -> yadif -> split -> [ProRes/S3] + [H.264/HLS].
|
||||
let sdiHlsDir = null;
|
||||
let hiresArgs;
|
||||
if (sourceType === 'sdi' && this._assetIdForHls) {
|
||||
const fsMod = await import('node:fs');
|
||||
sdiHlsDir = '/live/' + this._assetIdForHls;
|
||||
try { fsMod.mkdirSync(sdiHlsDir, { recursive: true }); } catch (_) {}
|
||||
hiresArgs = [
|
||||
...inputArgs,
|
||||
'-filter_complex', '[0:v]yadif=mode=1:deint=1,split=2[vhi][vlo]',
|
||||
// Output 0 — ProRes master (S3 pipe or growing file)
|
||||
'-map', '[vhi]', '-map', '0:a:0?',
|
||||
...hiresCodecArgs,
|
||||
hiresOutput,
|
||||
// Output 1 — low-latency H.264 HLS preview for the UI monitor.
|
||||
// GPU-encoded (h264_nvenc) when the GPU is attached to this sidecar,
|
||||
// otherwise libx264 (issue #164). GOP is pinned to one IDR per HLS
|
||||
// segment so segments start on keyframes (avoids black/flashing).
|
||||
'-map', '[vlo]', '-map', '0:a:0?',
|
||||
...buildHlsVideoArgs(videoCodec, framerate),
|
||||
'-c:a', 'aac', '-b:a', '128k', '-ar', '44100',
|
||||
'-f', 'hls', '-hls_time', '2', '-hls_list_size', '15',
|
||||
'-hls_flags', 'delete_segments+append_list+omit_endlist',
|
||||
'-hls_segment_filename', sdiHlsDir + '/seg-%05d.ts',
|
||||
sdiHlsDir + '/index.m3u8',
|
||||
];
|
||||
console.log('[HLS] SDI preview as 2nd output -> ' + sdiHlsDir);
|
||||
} else {
|
||||
hiresArgs = [ ...inputArgs, ...sdiFilterArgs, ...hiresCodecArgs, hiresOutput ];
|
||||
}
|
||||
|
||||
const hiresProcess = spawn('ffmpeg', hiresArgs, { stdio: hiresStdio });
|
||||
let hiresProcess;
|
||||
if (growingPath) {
|
||||
// ── GROWING master: raw2bmx orchestrator ──────────────────────────
|
||||
// One ffmpeg (single SDI read) → MPEG-2 422 elementary + PCM to FIFOs +
|
||||
// the H.264 HLS preview; raw2bmx muxes the growing OP1a MXF from the FIFOs.
|
||||
// Spawned via bash so the FIFO priming / EOF / stop-forwarding logic (see
|
||||
// _buildGrowingOrchestrator) runs as one supervised unit. detached:true so
|
||||
// it leads its own process group and we can clean-stop the whole pipeline.
|
||||
const orchArgs = this._buildGrowingOrchestrator({
|
||||
inputArgs,
|
||||
videoBitrate,
|
||||
// Recorder raster for the raw2bmx essence flag. recorders.js sets
|
||||
// RECORDING_RESOLUTION (e.g. '1920x1080' / '1080i' / 'native'); when
|
||||
// 'native'/absent, deriveGrowingRaster defaults to 1080i59.94.
|
||||
resolution: process.env.RECORDING_RESOLUTION || null,
|
||||
framerate,
|
||||
audioChannels,
|
||||
outPath: growingPath,
|
||||
hlsDir: (sourceType === 'sdi') ? sdiHlsDir : null,
|
||||
videoCodec,
|
||||
});
|
||||
console.log('[capture] growing master via raw2bmx; orchestrator script length=' + orchArgs[1].length);
|
||||
hiresProcess = spawn('bash', orchArgs, { stdio: ['ignore', 'ignore', 'pipe'], detached: true });
|
||||
} else {
|
||||
// ── Finalized (non-growing) master: ffmpeg muxes the MOV directly ──
|
||||
let hiresArgs;
|
||||
if (sourceType === 'sdi' && this._assetIdForHls) {
|
||||
hiresArgs = [
|
||||
...inputArgs,
|
||||
'-filter_complex', '[0:v]yadif=mode=1:deint=1,split=2[vhi][vlo]',
|
||||
// Output 0 — ProRes/MOV master (local temp, uploaded to S3 on stop)
|
||||
'-map', '[vhi]', '-map', '0:a:0?',
|
||||
...hiresCodecArgs,
|
||||
hiresOutput,
|
||||
// Output 1 — low-latency H.264 HLS preview for the UI monitor.
|
||||
// GPU-encoded (h264_nvenc) when the GPU is attached to this sidecar,
|
||||
// otherwise libx264 (issue #164). GOP is pinned to one IDR per HLS
|
||||
// segment so segments start on keyframes (avoids black/flashing).
|
||||
'-map', '[vlo]', '-map', '0:a:0?',
|
||||
...buildHlsVideoArgs(videoCodec, framerate),
|
||||
'-c:a', 'aac', '-b:a', '128k', '-ar', '44100',
|
||||
'-f', 'hls', '-hls_time', '2', '-hls_list_size', '15',
|
||||
'-hls_flags', 'delete_segments+append_list+omit_endlist',
|
||||
'-hls_segment_filename', sdiHlsDir + '/seg-%05d.ts',
|
||||
sdiHlsDir + '/index.m3u8',
|
||||
];
|
||||
console.log('[HLS] SDI preview as 2nd output -> ' + sdiHlsDir);
|
||||
} else {
|
||||
hiresArgs = [ ...inputArgs, ...sdiFilterArgs, ...hiresCodecArgs, hiresOutput ];
|
||||
}
|
||||
hiresProcess = spawn('ffmpeg', hiresArgs, { stdio: hiresStdio });
|
||||
}
|
||||
|
||||
// Growing-files: nothing to upload here (promotion worker handles S3).
|
||||
// Non-growing: the master is uploaded from the finalized local file in
|
||||
|
|
@ -792,17 +1009,34 @@ class CaptureManager {
|
|||
|
||||
const { processes, currentSession } = this.state;
|
||||
|
||||
// Send SIGINT and WAIT for ffmpeg to exit. This is what flushes the MOV
|
||||
// trailer (writes the moov atom with the full sample tables). If we uploaded
|
||||
// before ffmpeg finalized, the object would have no moov → "moov atom not
|
||||
// found" / "file cannot be opened" in Premiere.
|
||||
const isGrowing = !!currentSession.growingPath;
|
||||
|
||||
// Send SIGINT and WAIT for the master writer to exit cleanly.
|
||||
// - Non-growing: SIGINT flushes ffmpeg's MOV trailer (the moov atom with
|
||||
// full sample tables). Uploading before finalize → "moov atom not found".
|
||||
// - Growing: `processes.hires` is the bash ORCHESTRATOR (detached group
|
||||
// leader). SIGINT hits its trap, which forwards SIGINT to ffmpeg; ffmpeg
|
||||
// stops → raw2bmx gets EOF → raw2bmx writes the OP1a FOOTER and exits;
|
||||
// only then does the orchestrator exit. Awaiting it guarantees the
|
||||
// finalized, valid MXF is on the share before the promotion worker
|
||||
// uploads it. raw2bmx footer finalize of a long recording can take longer
|
||||
// than a MOV trailer flush, so the growing safety-net is more generous.
|
||||
const finalizeTimeoutMs = isGrowing ? 60000 : 15000;
|
||||
const waitExit = (proc) => new Promise((resolve) => {
|
||||
if (!proc || proc.exitCode !== null || proc.signalCode !== null) return resolve();
|
||||
let done = false;
|
||||
const finish = () => { if (!done) { done = true; resolve(); } };
|
||||
proc.once('exit', finish);
|
||||
// Safety net: don't hang stop() forever if ffmpeg refuses to exit.
|
||||
setTimeout(() => { try { proc.kill('SIGKILL'); } catch (_) {} finish(); }, 15000);
|
||||
// Safety net: don't hang stop() forever if the writer refuses to exit.
|
||||
setTimeout(() => {
|
||||
try {
|
||||
// Detached orchestrator → kill the whole process group (ffmpeg +
|
||||
// raw2bmx + bash); otherwise just the process.
|
||||
if (isGrowing && proc.pid) { try { process.kill(-proc.pid, 'SIGKILL'); } catch (_) {} }
|
||||
proc.kill('SIGKILL');
|
||||
} catch (_) {}
|
||||
finish();
|
||||
}, finalizeTimeoutMs);
|
||||
});
|
||||
|
||||
if (processes.hires) processes.hires.kill('SIGINT');
|
||||
|
|
|
|||
Loading…
Reference in a new issue