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Media-Server-Setup/bin/normalize-sweep.sh
Brandyn / Techy 704bc8c4d3 Logging framework: logfmt events in our scripts, container labels + rotated json-file logs, Caddy JSON access logs; LOGGING.md 
Store-agnostic: journald + Docker logs are the only taps any collector (Alloy/Loki, VictoriaLogs, Netdata) needs.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
2026-11-01 19:53:05 -06:00

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#!/bin/bash
# Normalize every finished original so editors always get the same kind of file:
# MP4 · H.264 8-bit 4:2:0 · constant frame rate · AAC audio · index up front · ≤2560x1440 · ≤60 fps
# - compliant files: untouched
# - fragmented/unindexed MP4 (MediaMTX output) with good codecs: lossless remux, replaced in place
# - anything else (HEVC, 10-bit, VFR, MKV, >1440p, >60fps): full-res re-encode -> name.mp4,
# raw source kept in a hidden .src/ subfolder next to it (Jellyfin/copyparty hide dot-dirs)
# - streams/<user>/<Title>/.live/<ts>.mp4 (MediaMTX writes here, hidden from Jellyfin/copyparty while live):
# when finished -> the timecode overscan band (if the streamer had it on) is decoded and then CROPPED OFF in a
# re-encode (libx264, frame timing preserved, audio copied) so the published file is the game image + audio +
# a tmcd timecode track, nothing else; streams without the band are remuxed losslessly. Published as flat
# MP4 streams/<user>/<Title>__<ts>.mp4 (one file per recording directly
# in the streamer's folder: Jellyfin would merge several files inside one title folder into ONE episode
# with "versions"), the .live source deleted, the empty title folder removed.
# - Syncthing folders (marker dir .stfolder in the folder root, receive-only): compliant files are left
# alone (zero copies); a non-compliant file is converted to name.mp4 (name.h264.mp4 if the raw is
# already .mp4), the raw's name is appended to .stlocal (an #include'd ignore list) so Syncthing
# drops it without flagging or re-pulling, then the raw is deleted. One copy on the server.
# - failure: name.normalize-failed.log is written and the file is skipped until that log is deleted
# Idempotent; safe every few minutes.
set -uo pipefail
ROOT="${MEDIA_ROOT:-/srv/media}"
MINS_IDLE=3
# Gap filling for STREAMS: re-encode to constant frame rate (duplicating frames across dropped-frame holes) when
# the total missing time is >= this many ms. 0 = never (default; a 3 h re-encode is ~6 h of CPU on the E-2136).
# Set via systemd Environment=FILL_GAPS_MS=... ; viewers already see held frames either way.
FILL_GAPS_MS="${FILL_GAPS_MS:-0}"
# Band removal re-encodes every stream that carried the timecode band. The raw (with band) is deleted after a
# successful encode; KEEP_RAW_STREAMS=1 keeps it in the hidden .src/ instead (doubles disk per night).
KEEP_RAW_STREAMS="${KEEP_RAW_STREAMS:-0}"
# Encoder threads for every re-encode (clips and streams). 2 leaves the box responsive for Jellyfin/live viewers;
# conversions take longer. systemd Environment=ENCODE_THREADS=... to change.
ENCODE_THREADS="${ENCODE_THREADS:-2}"
MAX_W=2560; MAX_H=1440; MAX_FPS=60
exec 9>"${LOCK_FILE:-/run/lock/normalize-sweep.lock}"
flock -n 9 || exit 0
# logfmt (LOGGING.md): vglog <level> event=<verb> key=value ... values with spaces must arrive pre-quoted
vglog() { local lvl="$1"; shift; printf 'ts=%s level=%s component=sweep %s\n' "$(date -Is)" "$lvl" "$*"; }
log() { vglog info "msg=\"$*\""; }
dur() { ffprobe -v error -show_entries format=duration -of csv=p=0 "$1" 2>/dev/null | cut -d. -f1; }
# --- probe: prints "verdict reason" where verdict ∈ ok|remux|encode|skip ----------------------
probe() {
local f="$1" ext="${1##*.}"
local json; json=$(ffprobe -v error -show_entries stream=codec_type,codec_name,pix_fmt,width,height,r_frame_rate,avg_frame_rate -of json "$f" 2>/dev/null) || { echo "skip unreadable"; return; }
local vcodec pix w h rfr afr acodecs
vcodec=$(jq -r '[.streams[]|select(.codec_type=="video")][0].codec_name // "none"' <<<"$json")
pix=$(jq -r '[.streams[]|select(.codec_type=="video")][0].pix_fmt // ""' <<<"$json")
w=$(jq -r '[.streams[]|select(.codec_type=="video")][0].width // 0' <<<"$json")
h=$(jq -r '[.streams[]|select(.codec_type=="video")][0].height // 0' <<<"$json")
rfr=$(jq -r '[.streams[]|select(.codec_type=="video")][0].r_frame_rate // "0/1"' <<<"$json")
afr=$(jq -r '[.streams[]|select(.codec_type=="video")][0].avg_frame_rate // "0/1"' <<<"$json")
acodecs=$(jq -r '[.streams[]|select(.codec_type=="audio")|.codec_name]|unique|join(",")' <<<"$json")
[[ $vcodec == none ]] && { echo "skip no-video"; return; }
local fps; fps=$(awk -F/ '{ if ($2>0) printf "%.3f", $1/$2; else print 0 }' <<<"$afr")
local reasons=()
[[ $vcodec == h264 ]] || reasons+=("codec=$vcodec")
[[ $pix == yuv420p ]] || reasons+=("pix=$pix")
(( w <= MAX_W && h <= MAX_H )) || reasons+=("size=${w}x${h}")
awk "BEGIN{exit !($fps > $MAX_FPS + 0.01)}" && reasons+=("fps=$fps")
[[ -z $acodecs || $acodecs == aac ]] || reasons+=("audio=$acodecs")
[[ ${ext,,} == mp4 ]] || reasons+=("container=$ext")
if (( ${#reasons[@]} )); then echo "encode ${reasons[*]}"; return; fi
# codecs fine. Fragmented MP4 (MediaMTX output) -> lossless remux. ffprobe's frame-rate figures are
# meaningless on fragmented files, so the VFR check only runs on flat files (i.e. after the remux).
local head; head=$(head -c 2097152 "$f" | grep -aob -m3 -E 'moov|mdat|moof' | tr '\n' ' ')
if grep -q moof <<<"$head"; then echo "remux fragmented"; return; fi
# real VFR test: do the gaps between the first ~400 frames vary? (dts is monotonic even with B-frames)
# portable awk (Debian's mawk has no asort): deltas -> sort -n -> median + spread
local vfr; vfr=$(ffprobe -v error -select_streams v:0 -show_entries packet=dts_time -of csv=p=0 -read_intervals '%+#400' "$f" 2>/dev/null |
awk 'NF && $1!="N/A" { if (p!="") print $1-p; p=$1 }' | sort -n |
awk '{ d[n++]=$1 }
END { if (n<20) { print "cfr"; exit }
med=d[int(n/2)]; if (med<=0) { print "cfr"; exit }
bad=0; for(i=0;i<n;i++){ x=d[i]-med; if(x<0)x=-x; if (x > med*0.25) bad++ }
print (bad > n*0.02) ? "vfr" : "cfr" }')
# streams: gaps from dropped frames are legitimate and re-encoding a 3 h file is hours of CPU — never VFR-encode
# them (the timecode sidecar lists the gaps instead). Clips (short, often genuinely VFR) still get CFR.
if [[ $vfr == vfr && $f != "$ROOT/streams/"* ]]; then echo "encode vfr"; return; fi
local moov mdat; moov=$(grep -o '[0-9]*:moov' <<<"$head" | cut -d: -f1 | head -1); mdat=$(grep -o '[0-9]*:mdat' <<<"$head" | cut -d: -f1 | head -1)
if [[ -z $moov || ( -n $mdat && $mdat -lt $moov ) ]]; then echo "remux index-last"; return; fi
echo "ok"
}
find "$ROOT/streams" "$ROOT/clips" -type f \
\( -iname '*.mp4' -o -iname '*.mkv' -o -iname '*.mov' -o -iname '*.ts' -o -iname '*.m4v' -o -iname '*.webm' \) \
! -path '*/.src/*' ! -path '*/.stfolder/*' ! -path '*/.stversions/*' ! -name '*.part' -mmin +"$MINS_IDLE" -print0 2>/dev/null |
while IFS= read -r -d '' src; do
base="${src%.*}"; ext="${src##*.}"
live=0; stream=""
if [[ $(basename "$(dirname "$src")") == .live ]]; then
live=1
titledir="$(dirname "$(dirname "$src")")" # streams/<user>/<Title>
stream="$(basename "$(dirname "$titledir")")/$(basename "$titledir")" # user/Title, the log correlation key
base="$(dirname "$titledir")/$(basename "$titledir")__$(basename "${src%.*}")" # streams/<user>/<Title>__<ts>
fi
synced=0; stroot=""
d="$(dirname "$src")"
while [[ $d == "$ROOT"/* ]]; do # find the Syncthing folder root, if any
if [[ -d "$d/.stfolder" ]]; then synced=1; stroot="$d"; break; fi
d="$(dirname "$d")"
done
[[ -e "$base.normalize-failed.log" ]] && continue
fuser -s "$src" 2>/dev/null && continue # still being written
[[ -e "$src" ]] || continue # dumped meanwhile
read -r verdict reason <<<"$(probe "$src")"
if (( live )); then
[[ $verdict == skip ]] && continue
[[ $verdict == ok ]] && verdict=remux # must leave .live/ either way
out="$base.mp4"; [[ -e "$out" ]] && { vglog info "event=skip reason=exists file=\"$out\" src=\"$src\""; continue; }
else
case "$verdict" in ok|skip) continue ;; esac
out="$base.mp4"
fi
if (( synced )); then
[[ $verdict == remux ]] && continue # synced + only an index issue: not worth touching
[[ ${ext,,} == mp4 ]] && out="$base.h264.mp4" # raw is already name.mp4: don't collide
[[ -e "$out" ]] && continue
fi
tmp="$out.part"
vglog info "event=verdict verdict=$verdict file=\"$src\" reason=\"$reason\" stream=\"$stream\""
tcargs=(); tcjson=""; band=0; deband=0
if (( live )); then
# timecode: decode the overscan strip (server clock) or fall back to the server arrival time in the filename
stem="$(basename "${src%.*}")"
arrival_ms=$(python3 - "$stem" <<'PYEOF'
import re, sys
from datetime import datetime
from zoneinfo import ZoneInfo
m = re.search(r"(\d{4})-(\d{2})-(\d{2})_(\d{2})-(\d{2})-(\d{2})(?:-(\d{1,6}))?", sys.argv[1])
if not m: sys.exit(0)
y, mo, d, h, mi, s, us = m.groups()
us = int((us or "0").ljust(6, "0"))
t = datetime(int(y), int(mo), int(d), int(h), int(mi), int(s), us, tzinfo=ZoneInfo("America/New_York"))
print(int(t.timestamp() * 1000))
PYEOF
)
eval "$(python3 /usr/local/bin/vgstrip.py plan "$src" "${arrival_ms:-}" 2>/dev/null || true)"
if [[ -n ${TC_TIMECODE:-} ]]; then
tcargs=(-timecode "$TC_TIMECODE" -metadata "creation_time=$TC_CREATION" -write_tmcd 1)
tcjson="${TC_JSON:-}"
vglog info "event=timecode file=\"$src\" stream=\"$stream\" source=$TC_SOURCE timecode=\"$TC_TIMECODE\""
fi
# the band has done its job once decoded: remove it from the picture (re-encode with a crop)
if [[ ${TC_SOURCE:-} == strip && ${TC_BAND:-0} -gt 0 ]]; then
band=$TC_BAND; deband=1; verdict=encode; reason="remove ${band}px timecode band"
vglog info "event=deband file=\"$src\" stream=\"$stream\" band_rows=$band"
fi
# opt-in gap filling: switch this stream from remux to a CFR re-encode when the holes add up to enough
if (( FILL_GAPS_MS > 0 )) && [[ $verdict == remux && -n $tcjson ]]; then
missing=$(python3 -c 'import json,sys; d=json.loads(sys.argv[1]); print(d.get("gaps",{}).get("total_missing_ms",0))' "$tcjson" 2>/dev/null || echo 0)
if (( missing >= FILL_GAPS_MS )); then
verdict=encode; reason="fill-gaps ${missing}ms"; vglog info "event=fill_gaps file=\"$src\" stream=\"$stream\" missing_ms=$missing"
fi
fi
fi
if [[ $verdict == remux ]]; then
nice -n 15 ionice -c 3 ffmpeg -nostdin -hide_banner -loglevel error -y -i "$src" \
-map 0 -c copy "${tcargs[@]}" -movflags +faststart -f mp4 "$tmp"
else
# scale down into the cap (never up), keep aspect, even dimensions; cap fps; CFR; all audio -> AAC
vf="scale='min(iw,$MAX_W)':'min(ih,$MAX_H)':force_original_aspect_ratio=decrease:force_divisible_by=2"
(( deband )) && vf="crop=iw:ih-${band}:0:0,$vf" # drop the band rows first (band is even, so sizes stay even)
fpsargs=(); fpsnow=$(awk -F/ '{ if ($2>0) printf "%.3f", $1/$2; else print 0 }' <<<"$(ffprobe -v error -select_streams v:0 -show_entries stream=avg_frame_rate -of csv=p=0 "$src")")
awk "BEGIN{exit !($fpsnow > $MAX_FPS + 0.01)}" && fpsargs=(-r "$MAX_FPS")
# streams keep their exact frame timing (gaps stay gaps unless FILL_GAPS_MS asked for CFR) and their AAC audio as-is
fpsmode=cfr; aargs=(-c:a aac -b:a 160k)
if (( live )) && [[ $reason != fill-gaps* ]]; then fpsmode=passthrough; fi
if (( live )) && [[ $reason != *audio=* ]]; then aargs=(-c:a copy); fi
nice -n 15 ionice -c 3 ffmpeg -nostdin -hide_banner -loglevel error -y -i "$src" \
-map 0:v:0 -map '0:a?' \
-c:v libx264 -preset veryfast -crf 18 -maxrate 30M -bufsize 60M -pix_fmt yuv420p -profile:v high -threads "$ENCODE_THREADS" \
-vf "$vf" -fps_mode "$fpsmode" "${fpsargs[@]}" \
"${aargs[@]}" \
"${tcargs[@]}" -movflags +faststart -f mp4 "$tmp"
fi
rc=$?
d1=$(dur "$src"); d2=$(dur "$tmp")
if (( rc == 0 )) && [[ -n $d1 && -n $d2 ]] && (( d2 >= d1 - 2 && d2 <= d1 + 2 )); then
if (( live )); then
mv -f "$tmp" "$out"; chown 1000:1000 "$out" 2>/dev/null
if [[ -n $tcjson ]]; then # sidecar: exact capture time (read by the Jellyfin plugin) + drift samples
printf '%s\n' "$tcjson" > "${out%.*}.json"; chown 1000:1000 "${out%.*}.json" 2>/dev/null
fi
if [[ $verdict == encode ]] && (( ! deband || KEEP_RAW_STREAMS )); then # gap-filled re-encode (or asked to): keep the raw in the hidden .src/
srcdir="$(dirname "$out")/.src"; mkdir -p "$srcdir"; chown 1000:1000 "$srcdir" 2>/dev/null
mv -f "$src" "$srcdir/$(basename "$out" .mp4).raw.mp4"
else
rm -f "$src" # band removal: the cropped file IS the recording; raw-with-band is not kept
fi
rmdir "$(dirname "$src")" "$titledir" 2>/dev/null || true # drop .live and the empty title folder
vglog info "event=published file=\"$out\" stream=\"$stream\" verdict=$verdict"; continue
elif (( synced )); then
rel_src="${src#"$stroot"/}"; rel_out="${out#"$stroot"/}"
{ echo "/$rel_out"; echo "/$rel_src"; } >> "$stroot/.stlocal" # ignore our output and the raw
chown 1000:1000 "$stroot/.stlocal" 2>/dev/null
sleep 2 # let Syncthing re-read ignores before the delete
mv -f "$tmp" "$out"
rm -f "$src" # raw stays on the gamer's PC; one copy here
elif [[ $verdict == remux ]]; then
mv -f "$tmp" "$src" # lossless: replace in place
else
srcdir="$(dirname "$src")/.src"; mkdir -p "$srcdir"; chown 1000:1000 "$srcdir" 2>/dev/null
mv -f "$src" "$srcdir/$(basename "$src")" # keep raw source, hidden from editors/Jellyfin
mv -f "$tmp" "$out"
fi
chown 1000:1000 "$out" 2>/dev/null
vglog info "event=done file=\"$out\" verdict=$verdict"
else
rm -f "$tmp"
{ echo "$(date '+%F %T') $verdict failed rc=$rc src_dur=${d1:-?} out_dur=${d2:-?} ($reason)"; } > "$base.normalize-failed.log"
vglog error "event=failed file=\"$src\" stream=\"$stream\" verdict=$verdict rc=$rc log=\"$base.normalize-failed.log\"" >&2
fi
done
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