mirror of
git://f0xx.org/ac/ac-ms-media-transcode
synced 2026-07-29 02:58:05 +03:00
5ca8a9f539
Encode-once/fanout scripts, HLS output, and single overloadable env source. Commits assets/pirate_drift.png as default watermark for cluster runs. Co-authored-by: Cursor <cursoragent@cursor.com>
99 lines
2.2 KiB
Bash
99 lines
2.2 KiB
Bash
#!/usr/bin/env bash
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# Shared bootstrap: ROOT, env defaults, encoding presets, pipe helpers.
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set -euo pipefail
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ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
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export ROOT
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# shellcheck disable=SC1091
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source "${ROOT}/lib/logging.sh"
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# shellcheck disable=SC1091
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source "${ROOT}/lib/env.sh"
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apply_encoding_preset() {
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case "${OUTPUT_PRESET}" in
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720p)
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WIDTH=1280
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HEIGHT=720
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FASTNESS=veryfast
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BV=2500k
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BUFSIZE=5000k
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;;
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1080p|*)
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WIDTH=1920
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HEIGHT=1080
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FASTNESS=faster
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BV=5000k
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BUFSIZE=10000k
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;;
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esac
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export WIDTH HEIGHT FASTNESS BV BUFSIZE
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RES="${WIDTH}x${HEIGHT}"
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PROFILE=high
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KEYFRAMES_INTL="${FPS}"
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GOP_INTL=$((KEYFRAMES_INTL * 2))
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PIX_FMT="-pix_fmt yuv420p"
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PRESET="-preset ${FASTNESS} -tune zerolatency -profile:v ${PROFILE} ${PIX_FMT} -x264-params keyint=${KEYFRAMES_INTL}:min-keyint=${KEYFRAMES_INTL} -g ${GOP_INTL} -flags +global_header"
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BITRATE="-b:v ${BV} -maxrate ${BV} -minrate ${BV}"
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VCODEC="-c:v libx264"
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ACODEC="-c:a aac -b:a 128k"
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export RES PROFILE PRESET BITRATE VCODEC ACODEC
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}
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apply_encoding_preset
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FFMPEG_TS_FLAGS=(
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-fflags +genpts+igndts
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-avoid_negative_ts make_zero
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-sn
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-movflags +faststart
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)
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read_rate_flag() {
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if [[ "${NEAR_REALTIME}" == "1" ]]; then
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RE_FLAG=(-re)
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else
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RE_FLAG=()
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fi
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}
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ensure_storage() {
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mkdir -p "${STORAGE_DIR}" "${RUN_DIR}"
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}
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ensure_pipe() {
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if [[ ! -p "${PIPE_PATH}" ]]; then
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mkfifo "${PIPE_PATH}"
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if command -v perl >/dev/null 2>&1; then
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perl -MFcntl -e 'fcntl(STDIN, 1031, shift) or die $!' "${PIPE_FIFO_SIZE}" <> "${PIPE_PATH}" || true
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fi
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fi
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exec 7<> "${PIPE_PATH}"
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}
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remove_pipe() {
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exec 7>&- 7<&- 2>/dev/null || true
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rm -f "${PIPE_PATH}" 2>/dev/null || true
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}
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next_record_path() {
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local counter=0 name
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ensure_storage
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while true; do
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name="$(printf "video%04d.%s" "${counter}" "${RECORD_FORMAT}")"
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if [[ ! -f "${STORAGE_DIR}/${name}" ]]; then
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echo "${STORAGE_DIR}/${name}"
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return
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fi
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counter=$((counter + 1))
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done
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}
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require_cmd() {
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command -v "$1" >/dev/null 2>&1 || die "required command not found: $1"
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}
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require_logo() {
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[[ -f "${LOGO_PATH}" ]] || die "logo not found at ${LOGO_PATH} (expected ${ROOT}/assets/pirate_drift.png)"
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}
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