perf(jellyfin): skip per-folder user data in folder tree listings
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edde746
@@ -1,143 +0,0 @@
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#!/usr/bin/env bash
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# Generates MKV test assets that prove (or disprove) frame-perfect ASS rendering:
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# the video has a per-frame counter burned in (top) and the MKV carries an ASS
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# track flipping the same counter (bottom) on exactly the same frame boundaries.
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# Any captured frame showing video number N with subtitle number != N is a sync
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# failure.
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#
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# Outputs (in scripts/framesync/):
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# framesync-2397.mkv 23.976 fps, plain per-frame counter events
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# framesync-60.mkv 60 fps variant
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# framesync-stress.mkv 23.976 fps + heavy animated typesetting (blur/scale/
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# rotation re-rendered every frame) to stress libass
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#
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# The burn-in uses, in order of preference: ffmpeg drawtext, ffmpeg subtitles
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# filter, or mpv's encoding mode (mpv always bundles libass) — all three
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# evaluate the counter at each frame's exact PTS, so the burned reference is
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# frame-exact by construction.
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#
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# Verification procedure (Android, ExoPlayer path):
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# 1. Play the file with the ASS track selected (SDR content and the
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# ASS-tunneling block mean the layers are screen-recordable).
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# 2. adb shell screenrecord /sdcard/sync.mp4 (record ~30 s, pull it)
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# 3. Step through frames (e.g. ffmpeg -i sync.mp4 frames/%05d.png, or mpv with
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# '.' frame-step): top (video) and bottom (player-rendered ASS) counters
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# must match on EVERY captured frame. Desktop mpv is the reference player.
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# 4. Cross-check at the compositor: while playing,
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# adb shell dumpsys SurfaceFlinger --latency
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# lists per-layer (desired, actual) present times for the video SurfaceView
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# and the ASS overlay layer — matched content must share vsync timestamps.
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# 5. Cheap regression: the in-app stats overlay should show subLateSwaps ≈ 0,
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# subOverflows == 0, subMinLeadMs ≥ 0 and a >95% subSpecHits ratio.
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set -euo pipefail
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cd "$(dirname "${BASH_SOURCE[0]}")"
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mkdir -p framesync
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cd framesync
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DURATION_S=${DURATION_S:-60}
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# drawtext resolves the family via fontconfig; override with FONT if needed.
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FONT=${FONT:-Sans}
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have_filter() { ffmpeg -hide_banner -filters 2>/dev/null | grep -q " $1 "; }
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# Emits an ASS file with one Dialogue event per frame. Frame i starts at
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# i*den/num seconds; timestamps are floored to ASS centisecond precision, which
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# is safe because the floor error (<10 ms) is smaller than any frame interval
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# generated here (16.7 / 41.7 ms) — an event can never leak onto the previous
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# frame. burn=1 emits the top-aligned white reference style (for burn-in),
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# burn=0 the bottom-aligned yellow player style; heavy=1 adds per-frame
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# animated blur/scale/rotation events.
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gen_ass() { # $1=fps_num $2=fps_den $3=frames $4=burn(0/1) $5=heavy(0/1) $6=outfile
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awk -v num="$1" -v den="$2" -v frames="$3" -v burn="$4" -v heavy="$5" '
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function ts(cs, h, m, s) {
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h = int(cs / 360000); cs -= h * 360000
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m = int(cs / 6000); cs -= m * 6000
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s = int(cs / 100); cs -= s * 100
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return sprintf("%d:%02d:%02d.%02d", h, m, s, cs)
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}
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BEGIN {
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print "[Script Info]"
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print "ScriptType: v4.00+"
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print "PlayResX: 1280"
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print "PlayResY: 720"
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print ""
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print "[V4+ Styles]"
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print "Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding"
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if (burn)
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print "Style: Counter,Arial,150,&H00FFFFFF,&H000000FF,&H00000000,&H00000000,-1,0,0,0,100,100,0,0,1,5,0,8,10,10,30,1"
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else
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print "Style: Counter,Arial,150,&H0000FFFF,&H000000FF,&H00000000,&H00000000,-1,0,0,0,100,100,0,0,1,5,0,2,10,10,30,1"
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print "Style: Stress,Arial,80,&H40FF8800,&H000000FF,&H00000000,&H00000000,-1,0,0,0,100,100,0,0,1,2,0,5,10,10,10,1"
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print ""
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print "[Events]"
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print "Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text"
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for (i = 0; i < frames; i++) {
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start = int(i * den * 100 / num)
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end = int((i + 1) * den * 100 / num)
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if (end <= start) end = start + 1
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printf "Dialogue: 0,%s,%s,Counter,,0,0,0,,%d\n", ts(start), ts(end), i
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if (heavy) {
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# Re-emitted every frame with a frame-dependent rotation/blur so libass
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# reports changed content and re-rasterizes large blurred glyphs —
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# approximates typesetting storms (the measured 100-400 ms frames).
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printf "Dialogue: 1,%s,%s,Stress,,0,0,0,,{\\an5\\pos(640,260)\\blur12\\fscx320\\fscy320\\frz%d}#\n", ts(start), ts(end), (i * 7) % 360
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printf "Dialogue: 1,%s,%s,Stress,,0,0,0,,{\\an5\\pos(640,500)\\blur18\\fscx500\\fscy220\\frz%d\\alpha&H80&}@\n", ts(start), ts(end), 359 - (i * 11) % 360
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}
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}
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}
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' /dev/null > "$6"
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}
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# Produces the reference video: gray frames with the frame counter burned in at
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# the top. Tries drawtext, then the subtitles filter, then mpv encoding.
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gen_video() { # $1=rate $2=burn_ass $3=outfile
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if have_filter drawtext; then
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ffmpeg -y -v error -f lavfi -i "color=c=0x202020:s=1280x720:r=$1" \
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-vf "drawtext=font='${FONT}':text='%{n}':fontsize=150:fontcolor=white:borderw=5:bordercolor=black:x=(w-text_w)/2:y=30" \
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-t "$DURATION_S" -c:v libx264 -preset veryfast -crf 18 -pix_fmt yuv420p "$3"
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elif have_filter subtitles; then
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ffmpeg -y -v error -f lavfi -i "color=c=0x202020:s=1280x720:r=$1" \
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-vf "subtitles=$2" \
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-t "$DURATION_S" -c:v libx264 -preset veryfast -crf 18 -pix_fmt yuv420p "$3"
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elif command -v mpv > /dev/null; then
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ffmpeg -y -v error -f lavfi -i "color=c=0x202020:s=1280x720:r=$1" \
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-t "$DURATION_S" -c:v libx264 -preset veryfast -crf 18 -pix_fmt yuv420p blank.mp4
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mpv blank.mp4 --sub-files="$2" --vf=sub --no-audio \
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--o="$3" --of=mp4 --ovc=libx264 --ovcopts=preset=veryfast,crf=18 \
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--msg-level=all=error
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rm -f blank.mp4
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else
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echo "error: need ffmpeg with drawtext or subtitles filter, or mpv (for the burn-in)" >&2
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exit 1
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fi
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}
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# Muxes the burned video + silent audio + the player-rendered ASS track.
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mux() { # $1=video $2=ass $3=outfile
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ffmpeg -y -v error -i "$1" -f lavfi -i "anullsrc=r=48000:cl=stereo" -i "$2" \
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-map 0:v -map 1:a -map 2 -c:v copy -c:a aac -b:a 64k -c:s copy -shortest \
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-metadata:s:s:0 language=eng -disposition:s:0 default "$3"
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}
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frames_2397=$(awk -v d="$DURATION_S" 'BEGIN { print int(d * 24000 / 1001) }')
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frames_60=$(awk -v d="$DURATION_S" 'BEGIN { print d * 60 }')
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echo "Generating ${DURATION_S}s assets..."
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gen_ass 24000 1001 "$frames_2397" 1 0 burn-2397.ass
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gen_ass 60 1 "$frames_60" 1 0 burn-60.ass
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gen_ass 24000 1001 "$frames_2397" 0 0 counter-2397.ass
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gen_ass 60 1 "$frames_60" 0 0 counter-60.ass
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gen_ass 24000 1001 "$frames_2397" 0 1 counter-stress.ass
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gen_video "24000/1001" burn-2397.ass video-2397.mp4
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gen_video "60" burn-60.ass video-60.mp4
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mux video-2397.mp4 counter-2397.ass framesync-2397.mkv
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mux video-60.mp4 counter-60.ass framesync-60.mkv
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mux video-2397.mp4 counter-stress.ass framesync-stress.mkv
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rm -f video-2397.mp4 video-60.mp4 burn-2397.ass burn-60.ass
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echo "Done:"
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ls -la framesync-*.mkv
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echo
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echo "Reference check: open framesync-2397.mkv in mpv, frame-step with '.' —"
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echo "top (video) and bottom (subtitle) counters must match on every frame."
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echo "Then repeat in Plezy on-device and screenrecord (see header comments)."
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