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https://github.com/legop3/MultiRoombaRover.git
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49 lines
1.5 KiB
Bash
49 lines
1.5 KiB
Bash
#!/usr/bin/env bash
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# Rover Snapshot Writer Hook
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# Purpose: Runs under mediaMTX runOnReady to keep per-rover JPEG snapshots updated on disk.
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# Scope: Writes only rover video path snapshots and ignores audio/forward/room paths.
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set -euo pipefail
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PATH_NAME="${MTX_PATH:-}"
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# Node resolves and supplies SERVER_DATA_DIR when it starts MediaMTX, and
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# MediaMTX carries that environment into this runOnReady hook. Requiring that
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# single root prevents the writer from silently recreating the former /var/lib
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# snapshot store while the readers are looking inside the mounted data folder.
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if [[ -z "${SERVER_DATA_DIR:-}" ]]; then
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echo "SERVER_DATA_DIR is required for rover snapshot output" >&2
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exit 1
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fi
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SNAP_DIR="${SERVER_DATA_DIR}/rover-snapshots"
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# Ignore non-rover-video paths.
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case "$PATH_NAME" in
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""|*-audio|*-fwd|room/*)
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exit 0
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;;
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esac
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mkdir -p "$SNAP_DIR"
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FILTER="fps=1"
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QUALITY="6"
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case "$PATH_NAME" in
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ptz-camera)
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# PTZ snapshots are shown to non-operators specifically to avoid sending the
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# full live video stream. The PTZ publisher is full-resolution 16:9 video,
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# so resize the JPEGs at the snapshot writer boundary before Node ever reads
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# and fans them out over Socket.IO.
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FILTER="fps=1,scale=480:-2"
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QUALITY="10"
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;;
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esac
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exec ffmpeg -hide_banner -loglevel warning -nostdin -y \
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-i "srt://127.0.0.1:9000?streamid=read:${PATH_NAME}" \
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-an \
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-vf "$FILTER" \
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-q:v "$QUALITY" \
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-update 1 \
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"${SNAP_DIR}/${PATH_NAME}.jpg"
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