Claude
4814c9e158
Previously sunrise-audio-capture.sh recorded the entire capture window (70+ minutes) and daily_sunrise_video.sh sought to the right position with a complex offset calculation. Now: record floor(TARGET/2) seconds before sunrise and ceil(TARGET/2) after — odd second goes to post-sunrise. The file is exactly SUNRISE_TARGET_SECS long and already centred, so no offset is needed when mixing. AUDIO_PRE_BUFFER_MIN removed — it was part of the old whole-window scheme and is no longer meaningful. https://claude.ai/code/session_01C4jbd3waXG3eKZYbGUjLUQ
86 lines
3.1 KiB
Bash
Executable File
86 lines
3.1 KiB
Bash
Executable File
#!/bin/bash
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# sunrise-audio-capture.sh — record exactly SUNRISE_TARGET_SECS of audio
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# centred on the actual sunrise moment, so daily_sunrise_video.sh can mix in
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# real ambient sound (birds, rain, wind) at natural speed.
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#
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# Triggered at 03:00 by sky-cam-audio-capture.timer; waits internally until
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# the right moment before recording. Exits immediately if AUDIO_ENABLED≠true.
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#
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# Recording window: floor(TARGET/2) seconds before sunrise,
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# ceil(TARGET/2) seconds after (odd second goes to post).
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#
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# Output: BASE_DIR/<cam>/YYYY-MM-DD/sunrise-audio.m4a
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# Deleted automatically by daily_sunrise_video.sh after mixing.
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set -euo pipefail
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SCRIPT_DIR="$(dirname "$(realpath "$0")")"
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source "$SCRIPT_DIR/sky-cam.conf"
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export TZ="$TIMEZONE"
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CAM="${1:-$SUNRISE_CAM}"
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if [ "${AUDIO_ENABLED:-false}" != "true" ]; then
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echo "AUDIO_ENABLED is not true — skipping."
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exit 0
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fi
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rtsp_var="CAM_RTSP_${CAM}"
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RTSP_URL="${!rtsp_var:-}"
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if [ -z "$RTSP_URL" ]; then
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echo "ERROR: CAM_RTSP_${CAM} not set in sky-cam.conf"
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exit 1
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fi
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# ── Sunrise time ──────────────────────────────────────────────────────────────
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sunrise_time=$(python3 "$SCRIPT_DIR/sunrise.py")
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if [ -z "$sunrise_time" ]; then
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"$SCRIPT_DIR/notify.sh" "FAILED: audio capture — no sunrise time" \
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"sunrise.py returned nothing — check internet/location config" || true
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exit 1
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fi
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sunrise_time_local=$(TZ="$TIMEZONE" date -d "$sunrise_time" +"%H:%M:%S")
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echo "Sunrise (local): $sunrise_time_local"
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# ── Calculate recording window centred on sunrise ─────────────────────────────
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time_to_seconds() { IFS=':' read -r h m s <<< "$1"; echo $((10#$h*3600 + 10#$m*60 + 10#$s)); }
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sunrise_sec=$(time_to_seconds "$sunrise_time_local")
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half_pre=$(( SUNRISE_TARGET_SECS / 2 )) # floor — pre-sunrise portion
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half_post=$(( SUNRISE_TARGET_SECS - half_pre )) # ceil — post-sunrise gets odd second
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record_start_sec=$(( sunrise_sec - half_pre ))
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record_dur_sec=$SUNRISE_TARGET_SECS
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echo "Audio window: ${half_pre}s before → ${half_post}s after sunrise (${record_dur_sec}s total)"
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midnight=$(date -d "today 00:00:00" +%s)
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now_day_sec=$(( $(date +%s) - midnight ))
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wait_sec=$(( record_start_sec - now_day_sec ))
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if [ "$wait_sec" -gt 0 ]; then
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echo "Waiting ${wait_sec}s until audio window ($(date -d "@$(( midnight + record_start_sec ))" '+%H:%M:%S'))..."
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sleep "$wait_sec"
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fi
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today=$(date +%Y-%m-%d)
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dir="$BASE_DIR/$CAM/$today"
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mkdir -p "$dir"
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output="$dir/sunrise-audio.m4a"
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echo "Recording ${record_dur_sec}s of audio → $output"
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if ! ffmpeg -loglevel warning \
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-rtsp_transport tcp \
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-i "$RTSP_URL" \
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-t "$record_dur_sec" \
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-vn \
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-acodec aac -b:a "${CAPTURE_AUDIO_BITRATE:-96k}" \
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-y "$output"; then
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"$SCRIPT_DIR/notify.sh" "FAILED: audio capture $today" \
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"ffmpeg audio recording failed — sunrise video will have no audio" || true
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exit 1
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fi
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size=$(du -h "$output" | cut -f1)
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echo "Audio capture complete: $output (${record_dur_sec}s, $size)"
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