cclohmar
6346d5fbe1
- /api/recordings no longer lists rec_*.part.mp4 files: FFmpeg has not written the moov atom yet, so they can never play. The in-progress segment was always the newest entry at the top of the list. - Record new segments with -movflags +faststart so the MP4 index is at the front. iOS/Safari otherwise tail-seeks the moov and stalls. - Add playsinline to the playback video for inline iOS playback. - Add scripts/remux-faststart.sh to convert the existing archive (dry-run by default, atomic, preserves mtime for retention).
133 lines
3.6 KiB
Bash
Executable file
133 lines
3.6 KiB
Bash
Executable file
#!/usr/bin/env bash
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# NextNVR — remux-faststart.sh
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#
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# Moves the MP4 index atom (moov) to the front of existing recordings so they
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# start immediately in browsers, especially Safari/iOS. New recordings already
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# use -movflags +faststart; this script fixes the archive recorded before that
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# change.
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#
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# Usage:
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# scripts/remux-faststart.sh [--apply] [recordings-path]
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#
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# Defaults to a dry run against /mnt/recordings. Writes are atomic (temp file
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# in the same directory + rename) and the original mtime is preserved so the
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# retention cleaner still sees the true recording age.
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#
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# Requirements: ffmpeg. python3 is optional — when present, files that already
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# have moov before mdat are skipped.
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set -euo pipefail
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APPLY=0
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ROOT="/mnt/recordings"
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usage() {
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cat <<'EOF'
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Usage: remux-faststart.sh [--apply] [recordings-path]
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--apply Actually rewrite files (default: dry run, report only)
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-h,--help Show this help
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Rewrites completed rec_*.mp4 files so their MP4 index (moov) is at the front.
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In-progress *.part.mp4 files are never touched.
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EOF
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}
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for arg in "$@"; do
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case "$arg" in
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--apply) APPLY=1 ;;
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-h|--help) usage; exit 0 ;;
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--*) echo "error: unknown option: $arg" >&2; usage >&2; exit 2 ;;
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*) ROOT="$arg" ;;
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esac
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done
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command -v ffmpeg >/dev/null 2>&1 || { echo "error: ffmpeg not found" >&2; exit 1; }
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[ -d "$ROOT" ] || { echo "error: not a directory: $ROOT" >&2; exit 1; }
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# Returns 0 when moov already precedes mdat (faststart), 1 when it does not,
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# 2 when the file cannot be parsed.
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moov_is_first() {
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python3 - "$1" <<'PY'
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import os
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import struct
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import sys
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path = sys.argv[1]
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size = os.path.getsize(path)
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off = 0
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order = []
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try:
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with open(path, "rb") as f:
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while off < size:
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f.seek(off)
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hdr = f.read(8)
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if len(hdr) < 8:
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break
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atom_size = struct.unpack(">I", hdr[:4])[0]
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atom_type = hdr[4:8].decode("latin1")
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if atom_size == 1:
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ext = f.read(8)
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if len(ext) < 8:
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break
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atom_size = struct.unpack(">Q", ext)[0]
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order.append(atom_type)
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if atom_size == 0:
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break
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off += atom_size
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except Exception:
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sys.exit(2)
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if "moov" not in order or "mdat" not in order:
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sys.exit(2)
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sys.exit(0 if order.index("moov") < order.index("mdat") else 1)
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PY
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}
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HAVE_PYTHON=0
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command -v python3 >/dev/null 2>&1 && HAVE_PYTHON=1
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total=0
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converted=0
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skipped=0
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failed=0
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echo "remux-faststart: root=$ROOT apply=$APPLY"
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while IFS= read -r -d '' file; do
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total=$((total + 1))
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if [ "$HAVE_PYTHON" -eq 1 ] && moov_is_first "$file"; then
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skipped=$((skipped + 1))
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continue
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fi
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if [ "$APPLY" -eq 0 ]; then
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echo "would remux: $file"
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converted=$((converted + 1))
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continue
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fi
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tmp="${file%.mp4}.faststart.tmp.mp4"
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if ffmpeg -nostdin -v error -y -i "$file" -c copy -movflags +faststart "$tmp" \
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&& touch -r "$file" "$tmp" \
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&& mv -f "$tmp" "$file"; then
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converted=$((converted + 1))
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echo "remuxed: $file"
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else
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failed=$((failed + 1))
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rm -f "$tmp"
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echo "FAILED: $file" >&2
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fi
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if [ $((converted % 100)) -eq 0 ] && [ "$converted" -gt 0 ]; then
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echo "--- progress: $converted processed ---"
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fi
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done < <(find "$ROOT" -type f -name 'rec_*.mp4' ! -name '*.part.mp4' -print0)
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echo
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echo "remux-faststart: scanned=$total remuxed=$converted skipped=$skipped failed=$failed"
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if [ "$APPLY" -eq 0 ] && [ "$converted" -gt 0 ]; then
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echo "dry run — re-run with --apply to rewrite the files above"
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fi
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