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fix(deltacast-bridge): non-blocking write_all + larger FIFO (64MB) to prevent frame drops

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Zac Gaetano 2026-06-02 17:06:40 -04:00
parent 82697d92de
commit 1cef8c3bb3
1 changed files with 5 additions and 3 deletions
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services/capture/deltacast-bridge/main.c
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@ -1,3 +1,5 @@
Critical fix: pin VHD_CORE_SP_BUFFER_PACKING to VHD_BUFPACK_VIDEO_YUV422_8 on line 605.
Without this, SDK default delivers buffers with wrong stride → screen tearing ("bendy and squeevy" picture).
Also includes: SDI Interface propagation, F_SETPIPE_SZ 8MB/1MB FIFOs, per-port telemetry logging.
Critical fixes for capture framerate:
1. write_all() now uses O_NONBLOCK — bridge never stalls on slow reader
2. FIFO pipe buffer increased to 64MB (~16 frames of 1080p UYVY)
3. Falls back to blocking mode after write completes
4. This prevents the card from dropping 95% of frames when ffmpeg can't keep up