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Christian PillsburyandClaude Opus 4.8
553061a30b
local-live.sh generates a sliding-window demuxed CMAF/fMP4 live stream with ffmpeg's HLS muxer (master + EXT-X-MEDIA audio group + fMP4 init/segments) to a temp dir, served with CORS and no caching — a no-creds local live source for the SPF engine and the hls.js/native sandbox pages. Documents the no-cache requirement (a positive max-age on a live playlist freezes the client's window — a server misconfiguration, not a player bug). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
57 lines
2.2 KiB
Bash
Executable File
57 lines
2.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Non-Mux local live HLS source — no Mux account or creds. ffmpeg generates a
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# test pattern + tone, and its HLS muxer writes demuxed CMAF/fMP4 (master +
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# audio group + fMP4 init/segments) to a temp dir, served with CORS and NO
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# caching. SPF plays it (also the hls.js / native sandbox pages).
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#
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# A live playlist MUST be served no-cache (http-server -c-1): otherwise reloads
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# return a stale media-sequence and the client's window never advances.
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#
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# Usage: ./local-live.sh [--port N] (default 8080). Ctrl-C to stop.
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# Then open, e.g.:
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# http://localhost:5173/spf-segment-loading/?src=http://localhost:8080/master.m3u8&muted=true&autoplay=true&preload=auto
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#
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# Requires: ffmpeg, npx (http-server).
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set -uo pipefail
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PORT=8080
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while [ $# -gt 0 ]; do
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case "$1" in
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--port) PORT="$2"; shift 2 ;;
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-h|--help) sed -n '2,13p' "$0" | sed 's/^# \{0,1\}//'; exit 0 ;;
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*) echo "unknown argument: $1" >&2; exit 1 ;;
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esac
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done
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OUT="${TMPDIR:-/tmp}/spf-local-live"
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rm -rf "$OUT"; mkdir -p "$OUT"
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SVR=""; FF=""
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cleanup() { kill "$SVR" "$FF" 2>/dev/null; exit 0; }
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trap cleanup INT TERM
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npx http-server "$OUT" -p "$PORT" --cors -c-1 -s & SVR=$!
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sleep 1
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echo "▶ live: http://localhost:$PORT/master.m3u8 (sliding-window, demuxed CMAF)"
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echo " sandbox: http://localhost:5173/spf-segment-loading/?src=http://localhost:$PORT/master.m3u8&muted=true&autoplay=true&preload=auto"
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echo " Ctrl-C to stop."
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# Demuxed via --var_stream_map (video variant + EXT-X-MEDIA audio group); fMP4
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# segments via -hls_segment_type fmp4; PDT for cross-track/reload timeline sync.
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ffmpeg -re \
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-f lavfi -i testsrc=size=1280x720:rate=30 \
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-f lavfi -i sine=frequency=440:sample_rate=48000 \
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-map 0:v -map 1:a \
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-c:v libx264 -preset veryfast -tune zerolatency -g 60 -keyint_min 60 -pix_fmt yuv420p \
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-c:a aac -b:a 128k -ar 48000 \
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-f hls -hls_time 2 -hls_list_size 6 \
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-hls_flags independent_segments+omit_endlist+program_date_time \
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-hls_segment_type fmp4 \
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-hls_fmp4_init_filename 'init_%v.mp4' \
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-hls_segment_filename "$OUT/seg_%v_%05d.m4s" \
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-master_pl_name master.m3u8 \
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-var_stream_map "v:0,agroup:aud,name:video a:0,agroup:aud,default:yes,name:audio" \
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"$OUT/stream_%v.m3u8" > "$OUT/ffmpeg.log" 2>&1 & FF=$!
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wait "$FF"
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