{ "schema_version": 3, "app": "jellyfin-ladder", "display_name": "Jellyfin transcode ladder", "upstream_repo": "https://github.com/jellyfin/jellyfin", "docs_url": "https://jellyfin.org/docs/general/installation/container/", "status": "ok", "summary": { "primary_service": "jellyfin", "app_version": "12.2", "app_version_pinned": true, "runs": 3, "publishable": true, "publishable_note": null, "idle_total_mem_mib": 267.26, "idle_total_cpu_pct": 1.68, "peak_total_mem_mib": 1204.22, "peak_is_under_load": true, "startup_seconds": 10.8, "startup_peak_total_mem_mib": 279.4, "settled": true, "settle_seconds_used": 121.2, "peak_max_mib": 1253.38, "sizing_peak_mib": 1253.38, "idle_mem_mib": { "median": 267.26, "min": 262.62, "max": 272.69, "values": [ 262.62, 267.26, 272.69 ] }, "idle_cpu_pct": { "median": 1.68, "min": 1.65, "max": 1.69, "values": [ 1.68, 1.65, 1.69 ] }, "peak_mem_mib": { "median": 1204.22, "min": 1175.55, "max": 1253.38, "values": [ 1175.55, 1204.22, 1253.38 ] }, "startup_peak_mem_mib": { "median": 279.4, "min": 276.9, "max": 281.7, "values": [ 276.9, 281.7, 279.4 ] }, "startup_s": { "median": 10.8, "min": 10.8, "max": 10.8, "values": [ 10.8, 10.8, 10.8 ] }, "settled_after_healthy_s": { "median": 124.8, "min": 124.7, "max": 126.8, "values": [ 126.8, 124.7, 124.8 ] }, "settled_runs": 3, "per_service": { "jellyfin": { "idle_mem_mib": { "median": 267.26, "min": 262.62, "max": 272.69, "values": [ 262.62, 267.26, 272.69 ] }, "peak_mem_mib": { "median": 1204.22, "min": 1175.55, "max": 1253.38, "values": [ 1175.55, 1204.22, 1253.38 ] } } }, "variance_flag": null, "representative_run": 2, "cpu_models": [ "INTEL(R) XEON(R) PLATINUM 8573C" ], "cpu_model_mismatch": false, "rule": "idle = median of the run idle means; peak = median of the run peaks (highest simultaneous total, under load when the app has a load step); peak_max_mib = highest run peak; sizing_peak_mib = highest over runs of max(run peak, run startup peak); variance_flag when max/min over runs is above 1.5 for idle or peak.", "ladder": { "levels": [ { "players": 1, "runs_measured": 3, "runs_skipped": 0, "runs_kept_up": 3, "verdict": "yes", "outcomes": [ "kept_up", "kept_up", "kept_up" ], "ffmpeg_speed_min_x": { "median": 3.12, "min": 3.05, "max": 3.14, "values": [ 3.14, 3.12, 3.05 ] }, "ffmpeg_speed_median_x": { "median": 3.12, "min": 3.05, "max": 3.14, "values": [ 3.14, 3.12, 3.05 ] }, "ffmpeg_speed_max_x": { "median": 3.12, "min": 3.05, "max": 3.14, "values": [ 3.14, 3.12, 3.05 ] }, "late_segments_total": { "median": 0, "min": 0, "max": 0, "values": [ 0, 0, 0 ] }, "max_lateness_s": { "median": 0.0, "min": 0.0, "max": 0.0, "values": [ 0.0, 0.0, 0.0 ] }, "stall_seconds_max": { "median": 0.0, "min": 0.0, "max": 0.0, "values": [ 0.0, 0.0, 0.0 ] }, "first_segment_s_max": { "median": 2.99, "min": 2.95, "max": 3.04, "values": [ 2.95, 2.99, 3.04 ] }, "stack_mem_mean_mib": { "median": 554.72, "min": 528.98, "max": 561.31, "values": [ 528.98, 561.31, 554.72 ] }, "stack_mem_max_mib": { "median": 566.3, "min": 541.9, "max": 571.9, "values": [ 541.9, 571.9, 566.3 ] }, "stack_cpu_mean_pct": { "median": 197.18, "min": 196.81, "max": 197.31, "values": [ 196.81, 197.31, 197.18 ] } }, { "players": 2, "runs_measured": 3, "runs_skipped": 0, "runs_kept_up": 3, "verdict": "yes", "outcomes": [ "kept_up", "kept_up", "kept_up" ], "ffmpeg_speed_min_x": { "median": 1.58, "min": 1.58, "max": 1.59, "values": [ 1.58, 1.59, 1.58 ] }, "ffmpeg_speed_median_x": { "median": 1.58, "min": 1.58, "max": 1.6, "values": [ 1.58, 1.6, 1.58 ] }, "ffmpeg_speed_max_x": { "median": 1.59, "min": 1.58, "max": 1.61, "values": [ 1.58, 1.61, 1.59 ] }, "late_segments_total": { "median": 0, "min": 0, "max": 0, "values": [ 0, 0, 0 ] }, "max_lateness_s": { "median": 0.0, "min": 0.0, "max": 0.0, "values": [ 0.0, 0.0, 0.0 ] }, "stall_seconds_max": { "median": 0.0, "min": 0.0, "max": 0.0, "values": [ 0.0, 0.0, 0.0 ] }, "first_segment_s_max": { "median": 5.57, "min": 4.87, "max": 5.58, "values": [ 4.87, 5.57, 5.58 ] }, "stack_mem_mean_mib": { "median": 795.5, "min": 774.03, "max": 803.84, "values": [ 774.03, 803.84, 795.5 ] }, "stack_mem_max_mib": { "median": 810.2, "min": 790.3, "max": 822.8, "values": [ 790.3, 822.8, 810.2 ] }, "stack_cpu_mean_pct": { "median": 197.53, "min": 197.39, "max": 197.59, "values": [ 197.39, 197.59, 197.53 ] } }, { "players": 3, "runs_measured": 3, "runs_skipped": 0, "runs_kept_up": 3, "verdict": "yes", "outcomes": [ "kept_up", "kept_up", "kept_up" ], "ffmpeg_speed_min_x": { "median": 1.03, "min": 1.03, "max": 1.04, "values": [ 1.03, 1.04, 1.03 ] }, "ffmpeg_speed_median_x": { "median": 1.06, "min": 1.03, "max": 1.06, "values": [ 1.03, 1.06, 1.06 ] }, "ffmpeg_speed_max_x": { "median": 1.06, "min": 1.04, "max": 1.07, "values": [ 1.04, 1.07, 1.06 ] }, "late_segments_total": { "median": 0, "min": 0, "max": 0, "values": [ 0, 0, 0 ] }, "max_lateness_s": { "median": 0.0, "min": 0.0, "max": 0.0, "values": [ 0.0, 0.0, 0.0 ] }, "stall_seconds_max": { "median": 0.0, "min": 0.0, "max": 0.0, "values": [ 0.0, 0.0, 0.0 ] }, "first_segment_s_max": { "median": 7.15, "min": 7.0, "max": 7.23, "values": [ 7.23, 7.15, 7.0 ] }, "stack_mem_mean_mib": { "median": 1021.36, "min": 971.91, "max": 1030.25, "values": [ 971.91, 1030.25, 1021.36 ] }, "stack_mem_max_mib": { "median": 1031.17, "min": 982.8, "max": 1039.36, "values": [ 982.8, 1039.36, 1031.17 ] }, "stack_cpu_mean_pct": { "median": 197.41, "min": 197.31, "max": 197.63, "values": [ 197.41, 197.31, 197.63 ] } }, { "players": 4, "runs_measured": 3, "runs_skipped": 0, "runs_kept_up": 0, "verdict": "no", "outcomes": [ "failed", "failed", "failed" ], "ffmpeg_speed_min_x": { "median": 0.78, "min": 0.76, "max": 0.78, "values": [ 0.78, 0.78, 0.76 ] }, "ffmpeg_speed_median_x": { "median": 0.78, "min": 0.77, "max": 0.79, "values": [ 0.78, 0.79, 0.77 ] }, "ffmpeg_speed_max_x": { "median": 0.79, "min": 0.78, "max": 0.82, "values": [ 0.79, 0.82, 0.78 ] }, "late_segments_total": { "median": 52, "min": 51, "max": 53, "values": [ 51, 52, 53 ] }, "max_lateness_s": { "median": 10.94, "min": 10.56, "max": 12.1, "values": [ 10.56, 10.94, 12.1 ] }, "stall_seconds_max": { "median": 10.94, "min": 10.56, "max": 12.1, "values": [ 10.56, 10.94, 12.1 ] }, "first_segment_s_max": { "median": 9.72, "min": 9.64, "max": 9.91, "values": [ 9.91, 9.64, 9.72 ] }, "stack_mem_mean_mib": { "median": 1193.74, "min": 1170.26, "max": 1243.95, "values": [ 1170.26, 1193.74, 1243.95 ] }, "stack_mem_max_mib": { "median": 1204.22, "min": 1175.55, "max": 1253.38, "values": [ 1175.55, 1204.22, 1253.38 ] }, "stack_cpu_mean_pct": { "median": 197.38, "min": 197.22, "max": 197.43, "values": [ 197.38, 197.22, 197.43 ] } }, { "players": 6, "runs_measured": 0, "runs_skipped": 3, "runs_kept_up": 0, "verdict": "not_run", "outcomes": [ "skipped", "skipped", "skipped" ], "ffmpeg_speed_min_x": null, "ffmpeg_speed_median_x": null, "ffmpeg_speed_max_x": null, "late_segments_total": null, "max_lateness_s": null, "stall_seconds_max": null, "first_segment_s_max": null, "stack_mem_mean_mib": null, "stack_mem_max_mib": null, "stack_cpu_mean_pct": null }, { "players": 8, "runs_measured": 0, "runs_skipped": 3, "runs_kept_up": 0, "verdict": "not_run", "outcomes": [ "skipped", "skipped", "skipped" ], "ffmpeg_speed_min_x": null, "ffmpeg_speed_median_x": null, "ffmpeg_speed_max_x": null, "late_segments_total": null, "max_lateness_s": null, "stall_seconds_max": null, "first_segment_s_max": null, "stack_mem_mean_mib": null, "stack_mem_max_mib": null, "stack_cpu_mean_pct": null } ], "max_players_kept_up": { "median": 3, "min": 3, "max": 3, "values": [ 3, 3, 3 ] }, "levels_requested": [ 1, 2, 3, 4, 6, 8 ], "hold_seconds": 60, "runs_with_ladder": 3, "stopped_early": [ { "run": 1, "after_players": 4, "reason": "4 players clearly failed (outcome failed); higher levels not run" }, { "run": 2, "after_players": 4, "reason": "4 players clearly failed (outcome failed); higher levels not run" }, { "run": 3, "after_players": 4, "reason": "4 players clearly failed (outcome failed); higher levels not run" } ], "definition": "A level kept up when every player received every segment it needed before its playhead reached it: no late segment on any player (lab/notes/jellyfin-2026-10-06.md, section 5; the same rule as the 2026-10-04 and 10-06 manual ladders). 'marginal' = some late segments but not a clear failure; 'failed' = at least half of the players were late on a quarter or more of their segments, or errored (the ladder stops there). Speeds are the speed= of the last ffmpeg progress line per player (an average since that ffmpeg started). Per level: verdict 'yes' = every measured run kept up, 'no' = none did, 'mixed' = some did. Figures are the median over the runs that measured the level; a level skipped in a run after a lower level failed is not counted for that run." } }, "run": { "started_at": "2026-10-11T07:54:42Z", "date": "2026-10-11", "harness_version": "3.0.0", "runs_requested": 3, "docker_host": null, "remote": false, "runs_completed": 3 }, "host": { "label": "github-actions ubuntu-latest (2 vCPU, 8 GB)", "ci": { "runs_on": "ubuntu-latest", "runner_environment": "github-hosted", "runner_os": "Linux", "runner_arch": "X64", "image_os": "ubuntu24", "image_version": "20261004.327.1" }, "cpu_model": "INTEL(R) XEON(R) PLATINUM 8573C", "cpu_model_note": null, "cores": 2, "mem_total_mib": 7937, "kernel": "6.17.0-1022-azure", "os": "Ubuntu 24.04.5 LTS", "arch": "x86_64", "oci_arch": "amd64", "docker_server_version": "28.0.4", "docker_client_version": "28.0.4", "compose_client_version": "2.38.2", "storage_driver": "overlay2", "containerd_image_store": false, "source": "docker info + throwaway container reading /proc/cpuinfo on the daemon host", "compose_note": "Compose runs on the client machine; Docker server fields are from the daemon host" }, "helper_images": { "curlimages/curl:latest": { "pulled_as": "curlimages/curl:latest", "digest": "curlimages/curl@sha256:58adaa4e8dca9c988bae2aba4ab3434a0bb2da16bbe3f92dec39ec7785166777" }, "python:3.12-slim": { "pulled_as": "python:3.12-slim", "digest": "python@sha256:a6e34c598f2467ed0e9a8d349809fcd8b5c603269512df273a0bb1784edc11b1" } }, "pull_seconds": 39.6, "finished_at": "2026-10-11T08:20:33Z", "elapsed_seconds": 1551.6, "services": { "jellyfin": { "image_ref": "jellyfin/jellyfin:12.2", "image_repo": "jellyfin/jellyfin", "image_tag": "12.2", "digest": "sha256:357724bf0ae27a672c7cbaa899db2d9abeb13dbd8657ccce750258a4c059d037", "digest_note": null, "version": "12.2", "version_source": "label:org.opencontainers.image.version", "version_pinned": true, "version_note": null, "resolved_tag": "12.2", "resolved_tag_note": null, "image_size": { "unpacked_mb": 1730.0, "unpacked_source": "docker image ls Size: unpacked image on the daemon host, rounded by docker to 3 significant figures", "compressed_mb": 754.0, "compressed_source": "sum of compressed layer sizes in the registry manifest for linux/amd64", "compressed_null_reason": null, "unit_note": "MB = 10^6 bytes. unpacked = disk used on the host; compressed = what is downloaded" }, "compose_image": "jellyfin/jellyfin:12.2", "compose_comment": "sha256:357724bf0ae27a672c7cbaa899db2d9abeb13dbd8657ccce750258a4c059d037 (version 12.2, from label:org.opencontainers.image.version)", "restart_count": 0, "oom_killed": false } }, "runs": [ { "run": 1, "started_at": "2026-10-11T07:55:27Z", "host": { "label": "github-actions ubuntu-latest (2 vCPU, 8 GB)", "ci": { "runs_on": "ubuntu-latest", "runner_environment": "github-hosted", "runner_os": "Linux", "runner_arch": "X64", "image_os": "ubuntu24", "image_version": "20261004.327.1" }, "cpu_model": "INTEL(R) XEON(R) PLATINUM 8573C", "cpu_model_note": null, "cores": 2, "mem_total_mib": 7937, "kernel": "6.17.0-1022-azure", "os": "Ubuntu 24.04.5 LTS", "arch": "x86_64", "oci_arch": "amd64", "docker_server_version": "28.0.4", "docker_client_version": "28.0.4", "compose_client_version": "2.38.2", "storage_driver": "overlay2", "containerd_image_store": false, "source": "docker info + throwaway container reading /proc/cpuinfo on the daemon host", "compose_note": "Compose runs on the client machine; Docker server fields are from the daemon host" }, "date": "2026-10-11", "startup": { "seconds": 10.8, "ok": true, "checks": [ { "type": "container", "ok": true, "ready_after_s": 10.8, "detail": "shb-jellyfin-ladder-jellyfin-1=running/healthy" } ], "up_command_seconds": 0.3, "definition": "wall clock from starting `docker compose up -d` until every health check passed; checks poll every 0.5 s from a throwaway container on the compose network, so resolution is about +/- 1 s" }, "versions": { "jellyfin": "12.2" }, "setup": [ { "exit_code": 0, "duration_s": 3.4, "reported": { "jellyfin_version": "12.2.0", "wizard_completed": true, "libraries": [ { "name": "Movies", "type": "movies", "paths": [ "/media/movies" ] } ] }, "output_tail": [ "GET /health -> HTTP 200 'Healthy'", "GET /System/Info/Public -> HTTP 200 version=12.2.0 wizard_completed=False local_address=http://172.18.0.2:8096", "POST /Startup/Configuration -> HTTP 204", "GET /Startup/User -> HTTP 200", "POST /Startup/User (create admin 'labadmin') -> HTTP 204", "POST /Startup/RemoteAccess -> HTTP 204", "POST /Startup/Complete -> HTTP 204", "GET /System/Info/Public -> wizard_completed=True", "POST /Users/AuthenticateByName -> HTTP 200 (token not printed)", "POST /Library/VirtualFolders (Movies -> /media/movies, no scan yet) -> HTTP 204", "libraries: [{\"name\": \"Movies\", \"type\": \"movies\", \"paths\": [\"/media/movies\"]}]" ], "description": "Complete the startup wizard through the documented Startup API (server name and language, the admin user, remote access, complete), log in, and add a library called Movies that points at /media/movies (no metadata fetchers for movies, so no lookups on the internet; no scan yet). This is the setup step of the jellyfin app, unchanged." } ], "idle": { "per_service": { "jellyfin": { "samples": 16, "mem_mean_mib": 262.62, "mem_max_mib": 266.8, "cpu_mean_pct": 1.68, "cpu_max_pct": 9.28 } }, "total": { "samples": 16, "dropped_for_total": 0, "mem_mean_mib": 262.62, "mem_max_mib": 266.8, "cpu_mean_pct": 1.68, "cpu_max_pct": 9.28 }, "window_seconds": 30.3, "series": [ { "t_offset_s": 0.0, "total_mem_mib": 260.2, "total_cpu_pct": 4.03 }, { "t_offset_s": 2.0, "total_mem_mib": 260.0, "total_cpu_pct": 0.09 }, { "t_offset_s": 4.0, "total_mem_mib": 260.0, "total_cpu_pct": 0.01 }, { "t_offset_s": 6.1, "total_mem_mib": 260.3, "total_cpu_pct": 0.02 }, { "t_offset_s": 8.1, "total_mem_mib": 260.3, "total_cpu_pct": 0.2 }, { "t_offset_s": 10.1, "total_mem_mib": 260.2, "total_cpu_pct": 6.74 }, { "t_offset_s": 12.1, "total_mem_mib": 260.2, "total_cpu_pct": 0.15 }, { "t_offset_s": 14.1, "total_mem_mib": 260.2, "total_cpu_pct": 0.01 }, { "t_offset_s": 16.2, "total_mem_mib": 260.6, "total_cpu_pct": 0.07 }, { "t_offset_s": 18.2, "total_mem_mib": 260.6, "total_cpu_pct": 0.04 }, { "t_offset_s": 20.2, "total_mem_mib": 266.3, "total_cpu_pct": 9.28 }, { "t_offset_s": 22.2, "total_mem_mib": 266.6, "total_cpu_pct": 0.11 }, { "t_offset_s": 24.2, "total_mem_mib": 266.4, "total_cpu_pct": 0.01 }, { "t_offset_s": 26.3, "total_mem_mib": 266.6, "total_cpu_pct": 0.02 }, { "t_offset_s": 28.3, "total_mem_mib": 266.6, "total_cpu_pct": 0.43 }, { "t_offset_s": 30.3, "total_mem_mib": 266.8, "total_cpu_pct": 5.73 } ] }, "settle": { "settled": true, "mode": "detected", "settle_seconds_used": 121.2, "settle_started_after_healthy_s": 5.6, "params": { "window_seconds": 60, "threshold_pct": 2.0, "threshold_min_mib": 10.0, "min_seconds": 120, "max_seconds": 600 }, "last_window": { "n": 30, "mean_mib": 261.83, "min_mib": 260.0, "max_mib": 265.2, "spread_mib": 5.2, "threshold_mib": 10.0 }, "rechecks": 0, "rule": "settled = over the last window_seconds the stack total varied (max - min) by less than max(threshold_pct of the window mean, threshold_min_mib); not before min_seconds, at the latest max_seconds, both counted from the end of the setup steps; the idle window must also be flat and agree with it. If max_seconds passes without settling, settled=false and the idle window is measured anyway." }, "startup_peak": { "per_service_mem_mib": { "jellyfin": 276.9 }, "total_mem_mib": 276.9, "samples": 63, "note": "highest value across docker stats samples (about one every 2-3 s) from healthy until the stack settled; shorter spikes between samples are not seen" }, "timeline": { "step_s": 10, "t0": "healthy", "offsets_s": [ 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160 ], "total_mem_mib": [ 259.8, 276.4, 268.8, 268.0, 265.2, 264.0, 264.1, 264.2, 262.6, 262.7, 260.3, 260.1, 260.3, 260.2, 262.9, 266.6 ], "per_service_mem_mib": { "jellyfin": [ 259.8, 276.4, 268.8, 268.0, 265.2, 264.0, 264.1, 264.2, 262.6, 262.7, 260.3, 260.1, 260.3, 260.2, 262.9, 266.6 ] } }, "load": { "per_service": { "jellyfin": { "samples": 166, "mem_mean_mib": 782.78, "mem_max_mib": 1175.55, "cpu_mean_pct": 167.41, "cpu_max_pct": 200.42 } }, "total": { "samples": 166, "dropped_for_total": 0, "mem_mean_mib": 782.78, "mem_max_mib": 1175.55, "cpu_mean_pct": 167.41, "cpu_max_pct": 200.42 }, "description": "One library scan, then a ladder of simultaneous software transcodes: 1, 2, 3, 4, 6 and 8 simulated players. Every player has its own device ID and plays the same 12-minute film, asking for a 1280x720, 4 Mb/s H.264 HLS stream that cannot direct play, so Jellyfin runs one ffmpeg per player with libx264 on the CPU (no hardware acceleration in the lab), and each player fetches the 3-second segments in real time for 60 seconds of playback. The 1080p H.264 source is synthetic: a test pattern with added noise at about 8 Mb/s, with AAC stereo audio that Jellyfin copies. ffmpeg runs without throttling (the default), so each job works as fast as the CPU allows. After each level the players stop their encodings, the script waits until Jellyfin reports no transcode and pauses 10 seconds. A level kept up when no player had a segment arrive after the moment its playhead needed it. For each level the result records the speed of every ffmpeg (from Jellyfin's transcode logs), the late segments and rebuffering of every player, the delay to the first segment and the memory and CPU of the stack. The ladder stops at the first level where at least half of the players are late on a quarter or more of their segments. No browser, no subtitles.", "duration_s": 330.6, "window": "from LAB_MARK load_start (or step start) until 2 s after the step ended", "reported_by_script": { "library_scan_seconds": 1.0, "library_scan_status": "Completed", "movies_in_library": 1, "ladder": { "item": "Long Test Feature", "levels_requested": [ 1, 2, 3, 4, 6, 8 ], "hold_seconds": 60, "pause_seconds": 10, "max_players_kept_up": 3, "stopped_early": { "after_players": 4, "reason": "4 players clearly failed (outcome failed); higher levels not run" }, "levels": [ { "players": 1, "skipped": false, "outcome": "kept_up", "kept_up": true, "clearly_failed": false, "start_offset_s": 3.3, "steady_start_offset_s": 7.6, "steady_end_offset_s": 67.6, "speed_min_x": 3.14, "speed_median_x": 3.14, "speed_max_x": 3.14, "steady_speed_min_x": 3.292, "steady_speed_median_x": 3.292, "ffmpeg_logs_found": 1, "late_segments_total": 0, "late_players": 0, "max_lateness_s": 0.0, "stall_events_total": 0, "stall_seconds_max": 0.0, "first_segment_s_median": 2.95, "first_segment_s_max": 2.95, "errors": [], "sessions_midway": { "transcoding_sessions": 0, "video_direct": 0, "video_codecs": [], "framerates": [] }, "transcode_reasons": [ "ContainerBitrateExceedsLimit" ], "players_detail": [ { "segments_fetched": 24, "playback_seconds": 60.1, "seconds_to_first_segment": 2.95, "error": null, "segments_after_start": 22, "late_segments": 0, "max_lateness_s": 0.0, "stall_events": 0, "stall_seconds": 0.0, "encoding_stop_http": 204 } ], "ffmpeg": [ { "last_speed_x": 3.14, "last_fps": 76.0, "media_time_s": 201.2, "elapsed_s": 64.0, "frames": 4845, "steady_speed_x": 3.292 } ], "transcodes_left_after_stop": 0, "stop_wait_s": 0.0 }, { "players": 2, "skipped": false, "outcome": "kept_up", "kept_up": true, "clearly_failed": false, "start_offset_s": 82.0, "steady_start_offset_s": 89.4, "steady_end_offset_s": 148.9, "speed_min_x": 1.58, "speed_median_x": 1.58, "speed_max_x": 1.58, "steady_speed_min_x": 1.637, 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"t_offset_s": 194.5, "total_mem_mib": 966.0, "total_cpu_pct": 195.0 }, { "t_offset_s": 196.5, "total_mem_mib": 965.6, "total_cpu_pct": 197.3 }, { "t_offset_s": 198.5, "total_mem_mib": 967.9, "total_cpu_pct": 198.35 }, { "t_offset_s": 200.5, "total_mem_mib": 971.1, "total_cpu_pct": 197.74 }, { "t_offset_s": 202.5, "total_mem_mib": 972.2, "total_cpu_pct": 197.66 }, { "t_offset_s": 204.5, "total_mem_mib": 971.7, "total_cpu_pct": 195.15 }, { "t_offset_s": 206.5, "total_mem_mib": 972.8, "total_cpu_pct": 198.19 }, { "t_offset_s": 208.5, "total_mem_mib": 982.8, "total_cpu_pct": 197.27 }, { "t_offset_s": 210.5, "total_mem_mib": 972.4, "total_cpu_pct": 199.5 }, { "t_offset_s": 212.5, "total_mem_mib": 972.9, "total_cpu_pct": 198.09 }, { "t_offset_s": 214.5, "total_mem_mib": 973.8, "total_cpu_pct": 191.95 }, { "t_offset_s": 216.5, "total_mem_mib": 973.4, "total_cpu_pct": 198.6 }, { "t_offset_s": 218.5, "total_mem_mib": 973.3, "total_cpu_pct": 199.78 }, { "t_offset_s": 220.5, "total_mem_mib": 973.2, "total_cpu_pct": 197.14 }, { "t_offset_s": 222.5, "total_mem_mib": 973.5, "total_cpu_pct": 198.68 }, { "t_offset_s": 224.5, "total_mem_mib": 973.0, "total_cpu_pct": 193.9 }, { "t_offset_s": 226.5, "total_mem_mib": 975.8, "total_cpu_pct": 198.74 }, { "t_offset_s": 228.5, "total_mem_mib": 977.3, "total_cpu_pct": 197.35 }, { "t_offset_s": 230.6, "total_mem_mib": 977.8, "total_cpu_pct": 196.3 }, { "t_offset_s": 232.6, "total_mem_mib": 977.2, "total_cpu_pct": 198.93 }, { "t_offset_s": 234.6, "total_mem_mib": 971.7, "total_cpu_pct": 194.22 }, { "t_offset_s": 236.6, "total_mem_mib": 349.1, "total_cpu_pct": 6.12 }, { "t_offset_s": 238.6, "total_mem_mib": 348.0, "total_cpu_pct": 0.02 }, { "t_offset_s": 240.6, "total_mem_mib": 348.7, "total_cpu_pct": 0.02 }, { "t_offset_s": 242.6, "total_mem_mib": 348.9, "total_cpu_pct": 0.01 }, { "t_offset_s": 244.6, "total_mem_mib": 348.8, "total_cpu_pct": 0.01 }, { "t_offset_s": 246.6, "total_mem_mib": 348.8, "total_cpu_pct": 4.16 }, { "t_offset_s": 248.6, "total_mem_mib": 348.6, "total_cpu_pct": 0.01 }, { "t_offset_s": 250.6, "total_mem_mib": 559.0, "total_cpu_pct": 180.86 }, { "t_offset_s": 252.6, "total_mem_mib": 1142.78, "total_cpu_pct": 198.17 }, { "t_offset_s": 254.6, "total_mem_mib": 1155.07, "total_cpu_pct": 195.32 }, { "t_offset_s": 256.6, "total_mem_mib": 1169.41, "total_cpu_pct": 197.39 }, { "t_offset_s": 258.6, "total_mem_mib": 1166.34, "total_cpu_pct": 198.27 }, { "t_offset_s": 260.6, "total_mem_mib": 1169.41, "total_cpu_pct": 198.73 }, { "t_offset_s": 262.6, "total_mem_mib": 1170.43, "total_cpu_pct": 195.63 }, { "t_offset_s": 264.7, "total_mem_mib": 1173.5, "total_cpu_pct": 194.71 }, { "t_offset_s": 266.7, "total_mem_mib": 1170.43, "total_cpu_pct": 198.12 }, { "t_offset_s": 268.7, "total_mem_mib": 1174.53, "total_cpu_pct": 196.85 }, { "t_offset_s": 270.7, "total_mem_mib": 1175.55, "total_cpu_pct": 198.41 }, { "t_offset_s": 272.7, "total_mem_mib": 1168.38, "total_cpu_pct": 198.78 }, { "t_offset_s": 274.7, "total_mem_mib": 1170.43, "total_cpu_pct": 195.29 }, { "t_offset_s": 276.7, "total_mem_mib": 1171.46, "total_cpu_pct": 199.92 }, { "t_offset_s": 278.7, "total_mem_mib": 1172.48, "total_cpu_pct": 196.91 }, { "t_offset_s": 280.7, "total_mem_mib": 1173.5, "total_cpu_pct": 199.8 }, { "t_offset_s": 282.7, "total_mem_mib": 1171.46, "total_cpu_pct": 198.86 }, { "t_offset_s": 284.7, "total_mem_mib": 1174.53, "total_cpu_pct": 192.41 }, { "t_offset_s": 286.7, "total_mem_mib": 1168.38, "total_cpu_pct": 198.37 }, { "t_offset_s": 288.7, "total_mem_mib": 1169.41, "total_cpu_pct": 198.86 }, { "t_offset_s": 290.7, "total_mem_mib": 1169.41, "total_cpu_pct": 195.61 }, { "t_offset_s": 292.7, "total_mem_mib": 1169.41, "total_cpu_pct": 199.27 }, { "t_offset_s": 294.7, "total_mem_mib": 1169.41, "total_cpu_pct": 197.37 }, { "t_offset_s": 296.7, "total_mem_mib": 1169.41, "total_cpu_pct": 198.36 }, { "t_offset_s": 298.7, "total_mem_mib": 1168.38, "total_cpu_pct": 198.28 }, { "t_offset_s": 300.7, "total_mem_mib": 1169.41, "total_cpu_pct": 194.47 }, { "t_offset_s": 302.8, "total_mem_mib": 1169.41, "total_cpu_pct": 197.78 }, { "t_offset_s": 304.8, "total_mem_mib": 1169.41, "total_cpu_pct": 197.28 }, { "t_offset_s": 306.8, "total_mem_mib": 1167.36, "total_cpu_pct": 198.28 }, { "t_offset_s": 308.8, "total_mem_mib": 1168.38, "total_cpu_pct": 199.33 }, { "t_offset_s": 310.8, "total_mem_mib": 1166.34, "total_cpu_pct": 194.33 }, { "t_offset_s": 312.8, "total_mem_mib": 1170.43, "total_cpu_pct": 196.86 }, { "t_offset_s": 314.8, "total_mem_mib": 1168.38, "total_cpu_pct": 198.18 }, { "t_offset_s": 316.8, "total_mem_mib": 1169.41, "total_cpu_pct": 199.31 }, { "t_offset_s": 318.8, "total_mem_mib": 1169.41, "total_cpu_pct": 197.15 }, { "t_offset_s": 320.8, "total_mem_mib": 1169.41, "total_cpu_pct": 194.9 }, { "t_offset_s": 322.8, "total_mem_mib": 1169.41, "total_cpu_pct": 198.92 }, { "t_offset_s": 324.8, "total_mem_mib": 950.9, "total_cpu_pct": 198.38 }, { "t_offset_s": 326.8, "total_mem_mib": 352.7, "total_cpu_pct": 9.07 }, { "t_offset_s": 328.8, "total_mem_mib": 352.0, "total_cpu_pct": 0.02 }, { "t_offset_s": 330.8, "total_mem_mib": 352.1, "total_cpu_pct": 0.01 } ], "series_start_offset_s": 1.4, "peak_note": "peak = highest value seen across docker stats samples (about one every 2-3 s); shorter spikes between samples are not seen" }, "container_end_state": { "jellyfin": { "restart_count": 0, "oom_killed": false } }, "teardown": { "done": true, "volumes_removed": true, "images_removed": false, "error": null }, "warnings": [], "finished_at": "2026-10-11T08:03:48Z", "elapsed_seconds": 501.3 }, { "run": 2, "started_at": "2026-10-11T08:03:48Z", "host": { "label": "github-actions ubuntu-latest (2 vCPU, 8 GB)", "ci": { "runs_on": "ubuntu-latest", "runner_environment": "github-hosted", "runner_os": "Linux", "runner_arch": "X64", "image_os": "ubuntu24", "image_version": "20261004.327.1" }, "cpu_model": "INTEL(R) XEON(R) PLATINUM 8573C", "cpu_model_note": null, "cores": 2, "mem_total_mib": 7937, "kernel": "6.17.0-1022-azure", "os": "Ubuntu 24.04.5 LTS", "arch": "x86_64", "oci_arch": "amd64", "docker_server_version": "28.0.4", "docker_client_version": "28.0.4", "compose_client_version": "2.38.2", "storage_driver": "overlay2", "containerd_image_store": false, "source": "docker info + throwaway container reading /proc/cpuinfo on the daemon host", "compose_note": "Compose runs on the client machine; Docker server fields are from the daemon host" }, "date": "2026-10-11", "startup": { "seconds": 10.8, "ok": true, "checks": [ { "type": "container", "ok": true, "ready_after_s": 10.8, "detail": "shb-jellyfin-ladder-jellyfin-1=running/healthy" } ], "up_command_seconds": 0.3, "definition": "wall clock from starting `docker compose up -d` until every health check passed; checks poll every 0.5 s from a throwaway container on the compose network, so resolution is about +/- 1 s" }, "versions": { "jellyfin": "12.2" }, "setup": [ { "exit_code": 0, "duration_s": 3.4, "reported": { "jellyfin_version": "12.2.0", "wizard_completed": true, "libraries": [ { "name": "Movies", "type": "movies", "paths": [ "/media/movies" ] } ] }, "output_tail": [ "GET /health -> HTTP 200 'Healthy'", "GET /System/Info/Public -> HTTP 200 version=12.2.0 wizard_completed=False local_address=http://172.18.0.2:8096", "POST /Startup/Configuration -> HTTP 204", "GET /Startup/User -> HTTP 200", "POST /Startup/User (create admin 'labadmin') -> HTTP 204", "POST /Startup/RemoteAccess -> HTTP 204", "POST /Startup/Complete -> HTTP 204", "GET /System/Info/Public -> wizard_completed=True", "POST /Users/AuthenticateByName -> HTTP 200 (token not printed)", "POST /Library/VirtualFolders (Movies -> /media/movies, no scan yet) -> HTTP 204", "libraries: [{\"name\": \"Movies\", \"type\": \"movies\", \"paths\": [\"/media/movies\"]}]" ], "description": "Complete the startup wizard through the documented Startup API (server name and language, the admin user, remote access, complete), log in, and add a library called Movies that points at /media/movies (no metadata fetchers for movies, so no lookups on the internet; no scan yet). This is the setup step of the jellyfin app, unchanged." } ], "idle": { "per_service": { "jellyfin": { "samples": 16, "mem_mean_mib": 267.26, "mem_max_mib": 269.4, "cpu_mean_pct": 1.65, "cpu_max_pct": 14.04 } }, "total": { "samples": 16, "dropped_for_total": 0, "mem_mean_mib": 267.26, "mem_max_mib": 269.4, "cpu_mean_pct": 1.65, "cpu_max_pct": 14.04 }, "window_seconds": 30.3, "series": [ { "t_offset_s": 0.0, "total_mem_mib": 266.4, "total_cpu_pct": 0.04 }, { "t_offset_s": 2.0, "total_mem_mib": 266.6, "total_cpu_pct": 4.84 }, { "t_offset_s": 4.0, "total_mem_mib": 266.6, "total_cpu_pct": 0.09 }, { "t_offset_s": 6.1, "total_mem_mib": 266.6, "total_cpu_pct": 0.01 }, { "t_offset_s": 8.1, "total_mem_mib": 266.1, "total_cpu_pct": 0.02 }, { "t_offset_s": 10.1, "total_mem_mib": 266.1, "total_cpu_pct": 0.23 }, { "t_offset_s": 12.1, "total_mem_mib": 266.4, "total_cpu_pct": 6.42 }, { "t_offset_s": 14.1, "total_mem_mib": 266.3, "total_cpu_pct": 0.13 }, { "t_offset_s": 16.2, "total_mem_mib": 266.1, "total_cpu_pct": 0.01 }, { "t_offset_s": 18.2, "total_mem_mib": 266.3, "total_cpu_pct": 0.02 }, { "t_offset_s": 20.2, "total_mem_mib": 266.3, "total_cpu_pct": 0.03 }, { "t_offset_s": 22.2, "total_mem_mib": 269.3, "total_cpu_pct": 14.04 }, { "t_offset_s": 24.2, "total_mem_mib": 269.3, "total_cpu_pct": 0.1 }, { "t_offset_s": 26.3, "total_mem_mib": 269.3, "total_cpu_pct": 0.01 }, { "t_offset_s": 28.3, "total_mem_mib": 269.4, "total_cpu_pct": 0.01 }, { "t_offset_s": 30.3, "total_mem_mib": 269.1, "total_cpu_pct": 0.41 } ] }, "settle": { "settled": true, "mode": "detected", "settle_seconds_used": 121.1, "settle_started_after_healthy_s": 3.6, "params": { "window_seconds": 60, "threshold_pct": 2.0, "threshold_min_mib": 10.0, "min_seconds": 120, "max_seconds": 600 }, "last_window": { "n": 30, "mean_mib": 269.07, "min_mib": 266.3, "max_mib": 276.0, "spread_mib": 9.7, "threshold_mib": 10.0 }, "rechecks": 0, "rule": "settled = over the last window_seconds the stack total varied (max - min) by less than max(threshold_pct of the window mean, threshold_min_mib); not before min_seconds, at the latest max_seconds, both counted from the end of the setup steps; the idle window must also be flat and agree with it. If max_seconds passes without settling, settled=false and the idle window is measured anyway." }, "startup_peak": { "per_service_mem_mib": { "jellyfin": 281.7 }, "total_mem_mib": 281.7, "samples": 62, "note": "highest value across docker stats samples (about one every 2-3 s) from healthy until the stack settled; shorter spikes between samples are not seen" }, "timeline": { "step_s": 10, "t0": "healthy", "offsets_s": [ 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160 ], "total_mem_mib": [ 269.1, 281.5, 281.1, 279.8, 276.7, 277.0, 275.3, 275.4, 269.7, 267.0, 266.5, 266.4, 266.5, 266.3, 267.5, 269.3 ], "per_service_mem_mib": { "jellyfin": [ 269.1, 281.5, 281.1, 279.8, 276.7, 277.0, 275.3, 275.4, 269.7, 267.0, 266.5, 266.4, 266.5, 266.3, 267.5, 269.3 ] } }, "load": { "per_service": { "jellyfin": { "samples": 167, "mem_mean_mib": 812.32, "mem_max_mib": 1204.22, "cpu_mean_pct": 167.51, "cpu_max_pct": 200.0 } }, "total": { "samples": 167, "dropped_for_total": 0, "mem_mean_mib": 812.32, "mem_max_mib": 1204.22, "cpu_mean_pct": 167.51, "cpu_max_pct": 200.0 }, "description": "One library scan, then a ladder of simultaneous software transcodes: 1, 2, 3, 4, 6 and 8 simulated players. Every player has its own device ID and plays the same 12-minute film, asking for a 1280x720, 4 Mb/s H.264 HLS stream that cannot direct play, so Jellyfin runs one ffmpeg per player with libx264 on the CPU (no hardware acceleration in the lab), and each player fetches the 3-second segments in real time for 60 seconds of playback. The 1080p H.264 source is synthetic: a test pattern with added noise at about 8 Mb/s, with AAC stereo audio that Jellyfin copies. ffmpeg runs without throttling (the default), so each job works as fast as the CPU allows. After each level the players stop their encodings, the script waits until Jellyfin reports no transcode and pauses 10 seconds. A level kept up when no player had a segment arrive after the moment its playhead needed it. For each level the result records the speed of every ffmpeg (from Jellyfin's transcode logs), the late segments and rebuffering of every player, the delay to the first segment and the memory and CPU of the stack. The ladder stops at the first level where at least half of the players are late on a quarter or more of their segments. No browser, no subtitles.", "duration_s": 332.5, "window": "from LAB_MARK load_start (or step start) until 2 s after the step ended", "reported_by_script": { "library_scan_seconds": 1.0, "library_scan_status": "Completed", "movies_in_library": 1, "ladder": { "item": "Long Test Feature", "levels_requested": [ 1, 2, 3, 4, 6, 8 ], "hold_seconds": 60, "pause_seconds": 10, "max_players_kept_up": 3, "stopped_early": { "after_players": 4, "reason": "4 players clearly failed (outcome failed); higher levels not run" }, "levels": [ { "players": 1, "skipped": false, "outcome": "kept_up", "kept_up": true, "clearly_failed": false, "start_offset_s": 3.3, "steady_start_offset_s": 7.5, "steady_end_offset_s": 67.6, "speed_min_x": 3.12, "speed_median_x": 3.12, "speed_max_x": 3.12, "steady_speed_min_x": 3.271, "steady_speed_median_x": 3.271, "ffmpeg_logs_found": 1, "late_segments_total": 0, "late_players": 0, "max_lateness_s": 0.0, "stall_events_total": 0, "stall_seconds_max": 0.0, "first_segment_s_median": 2.99, "first_segment_s_max": 2.99, "errors": [], "sessions_midway": { "transcoding_sessions": 1, "video_direct": 0, "video_codecs": [ "h264" ], "framerates": [ 72.0 ] }, "transcode_reasons": [ "ContainerBitrateExceedsLimit" ], "players_detail": [ { "segments_fetched": 24, "playback_seconds": 60.1, "seconds_to_first_segment": 2.99, "error": null, "segments_after_start": 22, "late_segments": 0, "max_lateness_s": 0.0, "stall_events": 0, "stall_seconds": 0.0, "encoding_stop_http": 204 } ], "ffmpeg": [ { "last_speed_x": 3.12, "last_fps": 75.0, "media_time_s": 199.8, "elapsed_s": 64.0, "frames": 4813, "steady_speed_x": 3.271 } ], "transcodes_left_after_stop": 0, "stop_wait_s": 0.0 }, { "players": 2, "skipped": false, "outcome": "kept_up", "kept_up": true, "clearly_failed": false, "start_offset_s": 82.0, "steady_start_offset_s": 89.9, "steady_end_offset_s": 148.5, "speed_min_x": 1.59, "speed_median_x": 1.6, "speed_max_x": 1.61, "steady_speed_min_x": 1.652, "steady_speed_median_x": 1.657, "ffmpeg_logs_found": 2, "late_segments_total": 0, "late_players": 0, "max_lateness_s": 0.0, "stall_events_total": 0, "stall_seconds_max": 0.0, "first_segment_s_median": 4.79, "first_segment_s_max": 5.57, "errors": [], "sessions_midway": { "transcoding_sessions": 2, "video_direct": 0, "video_codecs": [ "h264" ], "framerates": [ 37.0, 38.0 ] }, "transcode_reasons": [ "ContainerBitrateExceedsLimit" ], "players_detail": [ { "segments_fetched": 24, "playback_seconds": 60.1, "seconds_to_first_segment": 5.57, "error": null, "segments_after_start": 22, "late_segments": 0, "max_lateness_s": 0.0, "stall_events": 0, "stall_seconds": 0.0, "encoding_stop_http": 204 }, { "segments_fetched": 24, "playback_seconds": 60.2, "seconds_to_first_segment": 4.01, "error": null, "segments_after_start": 22, "late_segments": 0, "max_lateness_s": 0.0, "stall_events": 0, "stall_seconds": 0.0, "encoding_stop_http": 204 } ], "ffmpeg": [ { "last_speed_x": 1.59, "last_fps": 38.0, "media_time_s": 107.7, "elapsed_s": 67.6, "frames": 2599, "steady_speed_x": 1.662 }, { "last_speed_x": 1.61, "last_fps": 39.0, "media_time_s": 108.0, "elapsed_s": 67.0, "frames": 2599, "steady_speed_x": 1.652 } ], "transcodes_left_after_stop": 0, "stop_wait_s": 0.0 }, { "players": 3, "skipped": false, "outcome": "kept_up", "kept_up": true, "clearly_failed": false, "start_offset_s": 164.2, "steady_start_offset_s": 174.7, "steady_end_offset_s": 234.5, "speed_min_x": 1.04, "speed_median_x": 1.06, "speed_max_x": 1.07, "steady_speed_min_x": 1.074, "steady_speed_median_x": 1.114, "ffmpeg_logs_found": 3, "late_segments_total": 0, "late_players": 0, "max_lateness_s": 0.0, "stall_events_total": 0, "stall_seconds_max": 0.0, "first_segment_s_median": 6.64, "first_segment_s_max": 7.15, "errors": [], "sessions_midway": { "transcoding_sessions": 0, "video_direct": 0, "video_codecs": [], "framerates": [] }, "transcode_reasons": [ "ContainerBitrateExceedsLimit" ], "players_detail": [ { 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"media_time_s": 58.4, "elapsed_s": 74.6, "frames": 1410, "steady_speed_x": 0.792 }, { "last_speed_x": 0.787, "last_fps": 19.0, "media_time_s": 59.5, "elapsed_s": 75.6, "frames": 1434, "steady_speed_x": 0.844 }, { "last_speed_x": 0.781, "last_fps": 19.0, "media_time_s": 58.6, "elapsed_s": 74.9, "frames": 1410, "steady_speed_x": 0.803 }, { "last_speed_x": 0.821, "last_fps": 20.0, "media_time_s": 62.6, "elapsed_s": 76.2, "frames": 1512, "steady_speed_x": 0.89 } ] }, { "players": 6, "skipped": true, "reason": "4 players clearly failed (outcome failed); higher levels not run" }, { "players": 8, "skipped": true, "reason": "4 players clearly failed (outcome failed); higher levels not run" } ], "ffmpeg_command": "/usr/lib/jellyfin-ffmpeg/ffmpeg -analyzeduration 200M -probesize 1G -i file:\"/media/movies/Long Test Feature (2010)/Long Test Feature (2010).mp4\" -map_metadata -1 -map_chapters -1 -threads 0 -map 0:0 -map 0:1 -map -0:s -codec:v:0 libx264 -preset veryfast -crf 23 -maxrate 3872026 -bufsize 7744052 -profile:v:0 high -level 40 -x264opts:0 subme=0:me_range=16:rc_lookahead=10:me=hex:open_gop=0 -force_key_frames:0 \"expr:gte(t,n_forced*3)\" -sc_threshold:v:0 0 -vf \"setparams=color_primaries=bt709:color_trc=bt709:colorspace=bt709,scale=trunc(min(max(iw\\,ih*a)\\,min(1280\\,720*a))/2)*2:trunc(min(max(iw/a\\,ih)\\,min(1280/a\\,720))/2)*2,format=yuv420p\" -codec:a:0 copy -copyts -avoid_negative_ts disabled -max_muxing_queue_size 2048 -f hls -max_delay 5000000 -hls_time 3 -hls_segment_type mpegts -start_number 0 -hls_segment_filename \"/cache/transcodes/d27fff6126ab1980d3d1456fed6ac5b3%d.ts\" -hls_playlist_type vod -hls_list_size 0 -y \"/cache/transcodes/d27fff6126ab1980d3d1456fed6ac5b3.m3u8\"" } }, "output_tail": [ "ladder: levels [1, 2, 3, 4, 6, 8], 60 s of playback each, 10 s pause, keep-up = no late segment on any player", " 1 player(s): kept_up; ffmpeg speed 3.12-3.12x (1 log(s)); late segments 0 on 0 player(s), worst 0.0 s; stalls up to 0.0 s; first segment up to 2.99 s", " waited 0.0 s for the transcodes to end (0 still listed), pausing 10 s", " 2 player(s): kept_up; ffmpeg speed 1.59-1.61x (2 log(s)); late segments 0 on 0 player(s), worst 0.0 s; stalls up to 0.0 s; first segment up to 5.57 s", " waited 0.0 s for the transcodes to end (0 still listed), pausing 10 s", " 3 player(s): kept_up; ffmpeg speed 1.04-1.07x (3 log(s)); late segments 0 on 0 player(s), worst 0.0 s; stalls up to 0.0 s; first segment up to 7.15 s", " waited 0.0 s for the transcodes to end (0 still listed), pausing 10 s", " 4 player(s): failed; ffmpeg speed 0.781-0.821x (4 log(s)); late segments 52 on 4 player(s), worst 10.94 s; stalls up to 10.94 s; first segment up to 9.64 s", "max players that kept up: 3; stopped early: 4 players clearly failed (outcome failed); higher levels not run", " ffmpeg command: /usr/lib/jellyfin-ffmpeg/ffmpeg -analyzeduration 200M -probesize 1G -i file:\"/media/movies/Long Test Feature (2010)/Long Test Feature (2010).mp4\" -map_metadata -1 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"total_mem_mib": 360.6, "total_cpu_pct": 0.01 }, { "t_offset_s": 248.6, "total_mem_mib": 360.7, "total_cpu_pct": 3.89 }, { "t_offset_s": 250.6, "total_mem_mib": 362.1, "total_cpu_pct": 74.46 }, { "t_offset_s": 252.6, "total_mem_mib": 1093.63, "total_cpu_pct": 198.92 }, { "t_offset_s": 254.6, "total_mem_mib": 1169.41, "total_cpu_pct": 198.73 }, { "t_offset_s": 256.6, "total_mem_mib": 1178.62, "total_cpu_pct": 193.96 }, { "t_offset_s": 258.6, "total_mem_mib": 1181.7, "total_cpu_pct": 199.55 }, { "t_offset_s": 260.6, "total_mem_mib": 1184.77, "total_cpu_pct": 198.83 }, { "t_offset_s": 262.6, "total_mem_mib": 1186.82, "total_cpu_pct": 199.6 }, { "t_offset_s": 264.6, "total_mem_mib": 1196.03, "total_cpu_pct": 197.48 }, { "t_offset_s": 266.6, "total_mem_mib": 1188.86, "total_cpu_pct": 194.29 }, { "t_offset_s": 268.6, "total_mem_mib": 1190.91, "total_cpu_pct": 196.85 }, { "t_offset_s": 270.7, "total_mem_mib": 1192.96, "total_cpu_pct": 195.98 }, { "t_offset_s": 272.7, "total_mem_mib": 1184.77, "total_cpu_pct": 197.73 }, { "t_offset_s": 274.7, "total_mem_mib": 1185.79, "total_cpu_pct": 199.32 }, { "t_offset_s": 276.7, "total_mem_mib": 1187.84, "total_cpu_pct": 194.86 }, { "t_offset_s": 278.7, "total_mem_mib": 1186.82, "total_cpu_pct": 199.62 }, { "t_offset_s": 280.7, "total_mem_mib": 1189.89, "total_cpu_pct": 198.45 }, { "t_offset_s": 282.7, "total_mem_mib": 1191.94, "total_cpu_pct": 197.3 }, { "t_offset_s": 284.7, "total_mem_mib": 1191.94, "total_cpu_pct": 198.38 }, { "t_offset_s": 286.7, "total_mem_mib": 1204.22, "total_cpu_pct": 192.61 }, { "t_offset_s": 288.7, "total_mem_mib": 1193.98, "total_cpu_pct": 199.42 }, { "t_offset_s": 290.7, "total_mem_mib": 1189.89, "total_cpu_pct": 197.6 }, { "t_offset_s": 292.7, "total_mem_mib": 1201.15, "total_cpu_pct": 196.9 }, { "t_offset_s": 294.7, "total_mem_mib": 1192.96, "total_cpu_pct": 198.3 }, { "t_offset_s": 296.7, "total_mem_mib": 1192.96, "total_cpu_pct": 194.23 }, { "t_offset_s": 298.7, "total_mem_mib": 1193.98, "total_cpu_pct": 195.55 }, { "t_offset_s": 300.7, "total_mem_mib": 1192.96, "total_cpu_pct": 198.96 }, { "t_offset_s": 302.7, "total_mem_mib": 1193.98, "total_cpu_pct": 197.96 }, { "t_offset_s": 304.7, "total_mem_mib": 1191.94, "total_cpu_pct": 199.35 }, { "t_offset_s": 306.7, "total_mem_mib": 1192.96, "total_cpu_pct": 194.28 }, { "t_offset_s": 308.7, "total_mem_mib": 1195.01, "total_cpu_pct": 196.67 }, { "t_offset_s": 310.7, "total_mem_mib": 1192.96, "total_cpu_pct": 198.52 }, { "t_offset_s": 312.8, "total_mem_mib": 1195.01, "total_cpu_pct": 199.71 }, { "t_offset_s": 314.8, "total_mem_mib": 1204.22, "total_cpu_pct": 197.66 }, { "t_offset_s": 316.8, "total_mem_mib": 1198.08, "total_cpu_pct": 194.34 }, { "t_offset_s": 318.8, "total_mem_mib": 1198.08, "total_cpu_pct": 198.68 }, { "t_offset_s": 320.8, "total_mem_mib": 1202.18, "total_cpu_pct": 195.79 }, { "t_offset_s": 322.8, "total_mem_mib": 1198.08, "total_cpu_pct": 199.66 }, { "t_offset_s": 324.8, "total_mem_mib": 1199.1, "total_cpu_pct": 199.12 }, { "t_offset_s": 326.8, "total_mem_mib": 760.7, "total_cpu_pct": 191.46 }, { "t_offset_s": 328.8, "total_mem_mib": 363.7, "total_cpu_pct": 4.97 }, { "t_offset_s": 330.8, "total_mem_mib": 363.1, "total_cpu_pct": 0.02 }, { "t_offset_s": 332.8, "total_mem_mib": 363.2, "total_cpu_pct": 0.04 } ], "series_start_offset_s": 1.4, "peak_note": "peak = highest value seen across docker stats samples (about one every 2-3 s); shorter spikes between samples are not seen" }, "container_end_state": { "jellyfin": { "restart_count": 0, "oom_killed": false } }, "teardown": { "done": true, "volumes_removed": true, "images_removed": false, "error": null }, "warnings": [], "finished_at": "2026-10-11T08:12:10Z", "elapsed_seconds": 501.6 }, { "run": 3, "started_at": "2026-10-11T08:12:10Z", "host": { "label": "github-actions ubuntu-latest (2 vCPU, 8 GB)", "ci": { "runs_on": "ubuntu-latest", "runner_environment": "github-hosted", "runner_os": "Linux", "runner_arch": "X64", "image_os": "ubuntu24", "image_version": "20261004.327.1" }, "cpu_model": "INTEL(R) XEON(R) PLATINUM 8573C", "cpu_model_note": null, "cores": 2, "mem_total_mib": 7937, "kernel": "6.17.0-1022-azure", "os": "Ubuntu 24.04.5 LTS", "arch": "x86_64", "oci_arch": "amd64", "docker_server_version": "28.0.4", "docker_client_version": "28.0.4", "compose_client_version": "2.38.2", "storage_driver": "overlay2", "containerd_image_store": false, "source": "docker info + throwaway container reading /proc/cpuinfo on the daemon host", "compose_note": "Compose runs on the client machine; Docker server fields are from the daemon host" }, "date": "2026-10-11", "startup": { "seconds": 10.8, "ok": true, "checks": [ { "type": "container", "ok": true, "ready_after_s": 10.8, "detail": "shb-jellyfin-ladder-jellyfin-1=running/healthy" } ], "up_command_seconds": 0.3, "definition": "wall clock from starting `docker compose up -d` until every health check passed; checks poll every 0.5 s from a throwaway container on the compose network, so resolution is about +/- 1 s" }, "versions": { "jellyfin": "12.2" }, "setup": [ { "exit_code": 0, "duration_s": 3.4, "reported": { "jellyfin_version": "12.2.0", "wizard_completed": true, "libraries": [ { "name": "Movies", "type": "movies", "paths": [ "/media/movies" ] } ] }, "output_tail": [ "GET /health -> HTTP 200 'Healthy'", "GET /System/Info/Public -> HTTP 200 version=12.2.0 wizard_completed=False local_address=http://172.18.0.2:8096", "POST /Startup/Configuration -> HTTP 204", "GET /Startup/User -> HTTP 200", "POST /Startup/User (create admin 'labadmin') -> HTTP 204", "POST /Startup/RemoteAccess -> HTTP 204", "POST /Startup/Complete -> HTTP 204", "GET /System/Info/Public -> wizard_completed=True", "POST /Users/AuthenticateByName -> HTTP 200 (token not printed)", "POST /Library/VirtualFolders (Movies -> /media/movies, no scan yet) -> HTTP 204", "libraries: [{\"name\": \"Movies\", \"type\": \"movies\", \"paths\": [\"/media/movies\"]}]" ], "description": "Complete the startup wizard through the documented Startup API (server name and language, the admin user, remote access, complete), log in, and add a library called Movies that points at /media/movies (no metadata fetchers for movies, so no lookups on the internet; no scan yet). This is the setup step of the jellyfin app, unchanged." } ], "idle": { "per_service": { "jellyfin": { "samples": 16, "mem_mean_mib": 272.69, "mem_max_mib": 276.9, "cpu_mean_pct": 1.69, "cpu_max_pct": 14.52 } }, "total": { "samples": 16, "dropped_for_total": 0, "mem_mean_mib": 272.69, "mem_max_mib": 276.9, "cpu_mean_pct": 1.69, "cpu_max_pct": 14.52 }, "window_seconds": 30.3, "series": [ { "t_offset_s": 0.0, "total_mem_mib": 270.7, "total_cpu_pct": 0.03 }, { "t_offset_s": 2.0, "total_mem_mib": 271.0, "total_cpu_pct": 4.38 }, { "t_offset_s": 4.0, "total_mem_mib": 270.9, "total_cpu_pct": 0.1 }, { "t_offset_s": 6.1, "total_mem_mib": 270.9, "total_cpu_pct": 0.01 }, { "t_offset_s": 8.1, "total_mem_mib": 270.9, "total_cpu_pct": 0.02 }, { "t_offset_s": 10.1, "total_mem_mib": 270.7, "total_cpu_pct": 0.24 }, { "t_offset_s": 12.1, "total_mem_mib": 270.8, "total_cpu_pct": 6.88 }, { "t_offset_s": 14.1, "total_mem_mib": 270.7, "total_cpu_pct": 0.13 }, { "t_offset_s": 16.2, "total_mem_mib": 270.7, "total_cpu_pct": 0.01 }, { "t_offset_s": 18.2, "total_mem_mib": 270.9, "total_cpu_pct": 0.02 }, { "t_offset_s": 20.2, "total_mem_mib": 270.7, "total_cpu_pct": 0.05 }, { "t_offset_s": 22.2, "total_mem_mib": 276.9, "total_cpu_pct": 14.52 }, { "t_offset_s": 24.2, "total_mem_mib": 276.9, "total_cpu_pct": 0.12 }, { "t_offset_s": 26.3, "total_mem_mib": 276.9, "total_cpu_pct": 0.01 }, { "t_offset_s": 28.3, "total_mem_mib": 276.8, "total_cpu_pct": 0.02 }, { "t_offset_s": 30.3, "total_mem_mib": 276.6, "total_cpu_pct": 0.42 } ] }, "settle": { "settled": true, "mode": "detected", "settle_seconds_used": 121.2, "settle_started_after_healthy_s": 3.6, "params": { "window_seconds": 60, "threshold_pct": 2.0, "threshold_min_mib": 10.0, "min_seconds": 120, "max_seconds": 600 }, "last_window": { "n": 30, "mean_mib": 269.71, "min_mib": 266.8, "max_mib": 270.8, "spread_mib": 4.0, "threshold_mib": 10.0 }, "rechecks": 0, "rule": "settled = over the last window_seconds the stack total varied (max - min) by less than max(threshold_pct of the window mean, threshold_min_mib); not before min_seconds, at the latest max_seconds, both counted from the end of the setup steps; the idle window must also be flat and agree with it. If max_seconds passes without settling, settled=false and the idle window is measured anyway." }, "startup_peak": { "per_service_mem_mib": { "jellyfin": 279.4 }, "total_mem_mib": 279.4, "samples": 62, "note": "highest value across docker stats samples (about one every 2-3 s) from healthy until the stack settled; shorter spikes between samples are not seen" }, "timeline": { "step_s": 10, "t0": "healthy", "offsets_s": [ 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160 ], "total_mem_mib": [ 266.6, 279.2, 274.6, 272.7, 271.1, 268.9, 267.0, 268.8, 269.3, 270.4, 270.6, 269.9, 270.8, 270.8, 273.2, 276.8 ], "per_service_mem_mib": { "jellyfin": [ 266.6, 279.2, 274.6, 272.7, 271.1, 268.9, 267.0, 268.8, 269.3, 270.4, 270.6, 269.9, 270.8, 270.8, 273.2, 276.8 ] } }, "load": { "per_service": { "jellyfin": { "samples": 168, "mem_mean_mib": 819.3, "mem_max_mib": 1253.38, "cpu_mean_pct": 167.74, "cpu_max_pct": 200.68 } }, "total": { "samples": 168, "dropped_for_total": 0, "mem_mean_mib": 819.3, "mem_max_mib": 1253.38, "cpu_mean_pct": 167.74, "cpu_max_pct": 200.68 }, "description": "One library scan, then a ladder of simultaneous software transcodes: 1, 2, 3, 4, 6 and 8 simulated players. Every player has its own device ID and plays the same 12-minute film, asking for a 1280x720, 4 Mb/s H.264 HLS stream that cannot direct play, so Jellyfin runs one ffmpeg per player with libx264 on the CPU (no hardware acceleration in the lab), and each player fetches the 3-second segments in real time for 60 seconds of playback. The 1080p H.264 source is synthetic: a test pattern with added noise at about 8 Mb/s, with AAC stereo audio that Jellyfin copies. ffmpeg runs without throttling (the default), so each job works as fast as the CPU allows. After each level the players stop their encodings, the script waits until Jellyfin reports no transcode and pauses 10 seconds. A level kept up when no player had a segment arrive after the moment its playhead needed it. For each level the result records the speed of every ffmpeg (from Jellyfin's transcode logs), the late segments and rebuffering of every player, the delay to the first segment and the memory and CPU of the stack. The ladder stops at the first level where at least half of the players are late on a quarter or more of their segments. No browser, no subtitles.", "duration_s": 333.7, "window": "from LAB_MARK load_start (or step start) until 2 s after the step ended", "reported_by_script": { "library_scan_seconds": 1.0, "library_scan_status": "Completed", "movies_in_library": 1, "ladder": { "item": "Long Test Feature", "levels_requested": [ 1, 2, 3, 4, 6, 8 ], "hold_seconds": 60, "pause_seconds": 10, "max_players_kept_up": 3, "stopped_early": { "after_players": 4, "reason": "4 players clearly failed (outcome failed); higher levels not run" }, "levels": [ { "players": 1, "skipped": false, "outcome": "kept_up", "kept_up": true, "clearly_failed": false, "start_offset_s": 3.3, "steady_start_offset_s": 7.7, "steady_end_offset_s": 67.8, "speed_min_x": 3.05, "speed_median_x": 3.05, "speed_max_x": 3.05, "steady_speed_min_x": 3.215, "steady_speed_median_x": 3.215, "ffmpeg_logs_found": 1, "late_segments_total": 0, "late_players": 0, "max_lateness_s": 0.0, "stall_events_total": 0, "stall_seconds_max": 0.0, "first_segment_s_median": 3.04, "first_segment_s_max": 3.04, "errors": [], "sessions_midway": { "transcoding_sessions": 0, "video_direct": 0, "video_codecs": [], "framerates": [] }, "transcode_reasons": [ "ContainerBitrateExceedsLimit" ], "players_detail": [ { "segments_fetched": 24, "playback_seconds": 60.1, "seconds_to_first_segment": 3.04, "error": null, "segments_after_start": 22, "late_segments": 0, "max_lateness_s": 0.0, "stall_events": 0, "stall_seconds": 0.0, "encoding_stop_http": 204 } ], "ffmpeg": [ { "last_speed_x": 3.05, "last_fps": 73.0, "media_time_s": 194.9, "elapsed_s": 64.0, "frames": 4695, "steady_speed_x": 3.215 } ], "transcodes_left_after_stop": 0, "stop_wait_s": 0.0 }, { "players": 2, "skipped": false, "outcome": "kept_up", "kept_up": true, "clearly_failed": false, "start_offset_s": 82.1, "steady_start_offset_s": 90.0, "steady_end_offset_s": 148.7, "speed_min_x": 1.58, "speed_median_x": 1.585, "speed_max_x": 1.59, "steady_speed_min_x": 1.596, 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"media_time_s": 106.0, "elapsed_s": 66.9, "frames": 2549, "steady_speed_x": 1.596 }, { "last_speed_x": 1.59, "last_fps": 38.0, "media_time_s": 107.5, "elapsed_s": 67.6, "frames": 2599, "steady_speed_x": 1.685 } ], "transcodes_left_after_stop": 0, "stop_wait_s": 0.0 }, { "players": 3, "skipped": false, "outcome": "kept_up", "kept_up": true, "clearly_failed": false, "start_offset_s": 164.5, "steady_start_offset_s": 175.0, "steady_end_offset_s": 235.5, "speed_min_x": 1.03, "speed_median_x": 1.06, "speed_max_x": 1.06, "steady_speed_min_x": 1.051, "steady_speed_median_x": 1.104, "ffmpeg_logs_found": 3, "late_segments_total": 0, "late_players": 0, "max_lateness_s": 0.0, "stall_events_total": 0, "stall_seconds_max": 0.0, "first_segment_s_median": 6.91, "first_segment_s_max": 7.0, "errors": [], "sessions_midway": { "transcoding_sessions": 2, "video_direct": 0, "video_codecs": [ "h264" ], "framerates": [ 25.0, 25.0 ] }, "transcode_reasons": [ "ContainerBitrateExceedsLimit" ], "players_detail": 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"media_time_s": 58.4, "elapsed_s": 74.6, "frames": 1406, "steady_speed_x": 0.776 }, { "last_speed_x": 0.769, "last_fps": 19.0, "media_time_s": 58.8, "elapsed_s": 76.5, "frames": 1418, "steady_speed_x": 0.795 }, { "last_speed_x": 0.761, "last_fps": 18.0, "media_time_s": 58.4, "elapsed_s": 76.8, "frames": 1414, "steady_speed_x": 0.824 }, { "last_speed_x": 0.765, "last_fps": 18.0, "media_time_s": 58.7, "elapsed_s": 76.7, "frames": 1414, "steady_speed_x": 0.813 } ] }, { "players": 6, "skipped": true, "reason": "4 players clearly failed (outcome failed); higher levels not run" }, { "players": 8, "skipped": true, "reason": "4 players clearly failed (outcome failed); higher levels not run" } ], "ffmpeg_command": "/usr/lib/jellyfin-ffmpeg/ffmpeg -analyzeduration 200M -probesize 1G -i file:\"/media/movies/Long Test Feature (2010)/Long Test Feature (2010).mp4\" -map_metadata -1 -map_chapters -1 -threads 0 -map 0:0 -map 0:1 -map -0:s -codec:v:0 libx264 -preset veryfast -crf 23 -maxrate 3872026 -bufsize 7744052 -profile:v:0 high -level 40 -x264opts:0 subme=0:me_range=16:rc_lookahead=10:me=hex:open_gop=0 -force_key_frames:0 \"expr:gte(t,n_forced*3)\" -sc_threshold:v:0 0 -vf \"setparams=color_primaries=bt709:color_trc=bt709:colorspace=bt709,scale=trunc(min(max(iw\\,ih*a)\\,min(1280\\,720*a))/2)*2:trunc(min(max(iw/a\\,ih)\\,min(1280/a\\,720))/2)*2,format=yuv420p\" -codec:a:0 copy -copyts -avoid_negative_ts disabled -max_muxing_queue_size 2048 -f hls -max_delay 5000000 -hls_time 3 -hls_segment_type mpegts -start_number 0 -hls_segment_filename \"/cache/transcodes/cfb20e6398db477a12d3428924323d78%d.ts\" -hls_playlist_type vod -hls_list_size 0 -y \"/cache/transcodes/cfb20e6398db477a12d3428924323d78.m3u8\"" } }, "output_tail": [ "ladder: levels [1, 2, 3, 4, 6, 8], 60 s of playback each, 10 s pause, keep-up = no late segment on any player", " 1 player(s): kept_up; ffmpeg speed 3.05-3.05x (1 log(s)); late segments 0 on 0 player(s), worst 0.0 s; stalls up to 0.0 s; first segment up to 3.04 s", " waited 0.0 s for the transcodes to end (0 still listed), pausing 10 s", " 2 player(s): kept_up; ffmpeg speed 1.58-1.59x (2 log(s)); late segments 0 on 0 player(s), worst 0.0 s; stalls up to 0.0 s; first segment up to 5.58 s", " waited 0.0 s for the transcodes to end (0 still listed), pausing 10 s", " 3 player(s): kept_up; ffmpeg speed 1.03-1.06x (3 log(s)); late segments 0 on 0 player(s), worst 0.0 s; stalls up to 0.0 s; first segment up to 7.0 s", " waited 0.0 s for the transcodes to end (0 still listed), pausing 10 s", " 4 player(s): failed; ffmpeg speed 0.761-0.783x (4 log(s)); late segments 53 on 4 player(s), worst 12.1 s; stalls up to 12.1 s; first segment up to 9.72 s", "max players that kept up: 3; stopped early: 4 players clearly failed (outcome failed); higher levels not run", " ffmpeg command: /usr/lib/jellyfin-ffmpeg/ffmpeg -analyzeduration 200M -probesize 1G -i file:\"/media/movies/Long Test Feature (2010)/Long Test Feature (2010).mp4\" -map_metadata -1 -map_chapters -1 -threads 0 -map 0:0 -map 0:1 -map -0:s -codec:v:0 libx264 -preset veryfast -crf 23 -maxrate 3872026 -bufsize 7744052 -profile:v:0 high -level 40 -x264opts:0 subme=0:me_range=16:rc_lookahead=10:me=hex:open_gop=0 -force_key_frames:0 \"expr:gte(t,n_forced*3)\" -sc_threshold:v:0 0 -vf \"setparams=color_primaries=bt709:color_trc=bt709:colorspace=bt709,scale=trunc(min(max(iw\\,ih*a)\\,min(1280\\,720*a))/2)*2:trunc(min(max(iw/a\\,ih)\\,min(1280/a\\,720))/2)*2,format=yuv420p\" -codec:a:0 copy -copyts -avoid_negative_ts disabled -max_muxing_queue_size 2048 -f hls -max_delay 5000000 -hls_time 3 -hls_segment_type mpegts -start_number 0 -hls_segment_filename \"/cache/transcodes/cfb20e6398db477a12d3428924323d78%d.ts\" -hls_playlist_type vod -hls_list_size 0 -y \"/cache/transcodes/cfb20e6398db477a12d3428924323d78.m3u8\"" ], "series": [ { "t_offset_s": 0.0, "total_mem_mib": 293.4, "total_cpu_pct": 100.62 }, { "t_offset_s": 2.0, "total_mem_mib": 296.6, "total_cpu_pct": 85.84 }, { 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300.7, "total_mem_mib": 1252.35, "total_cpu_pct": 197.85 }, { "t_offset_s": 302.7, "total_mem_mib": 1253.38, "total_cpu_pct": 197.35 }, { "t_offset_s": 304.8, "total_mem_mib": 1250.3, "total_cpu_pct": 199.48 }, { "t_offset_s": 306.8, "total_mem_mib": 1250.3, "total_cpu_pct": 193.04 }, { "t_offset_s": 308.8, "total_mem_mib": 1249.28, "total_cpu_pct": 195.8 }, { "t_offset_s": 310.8, "total_mem_mib": 1250.3, "total_cpu_pct": 200.1 }, { "t_offset_s": 312.8, "total_mem_mib": 1245.18, "total_cpu_pct": 198.69 }, { "t_offset_s": 314.8, "total_mem_mib": 1246.21, "total_cpu_pct": 199.27 }, { "t_offset_s": 316.8, "total_mem_mib": 1242.11, "total_cpu_pct": 193.87 }, { "t_offset_s": 318.8, "total_mem_mib": 1241.09, "total_cpu_pct": 198.26 }, { "t_offset_s": 320.8, "total_mem_mib": 1243.14, "total_cpu_pct": 198.55 }, { "t_offset_s": 322.8, "total_mem_mib": 1244.16, "total_cpu_pct": 200.68 }, { "t_offset_s": 324.8, "total_mem_mib": 1252.35, "total_cpu_pct": 196.66 }, { "t_offset_s": 326.8, "total_mem_mib": 1025.02, "total_cpu_pct": 195.37 }, { "t_offset_s": 328.8, "total_mem_mib": 788.7, "total_cpu_pct": 197.72 }, { "t_offset_s": 330.8, "total_mem_mib": 356.5, "total_cpu_pct": 12.98 }, { "t_offset_s": 332.8, "total_mem_mib": 356.9, "total_cpu_pct": 4.13 }, { "t_offset_s": 334.8, "total_mem_mib": 356.7, "total_cpu_pct": 0.01 } ], "series_start_offset_s": 1.4, "peak_note": "peak = highest value seen across docker stats samples (about one every 2-3 s); shorter spikes between samples are not seen" }, "container_end_state": { "jellyfin": { "restart_count": 0, "oom_killed": false } }, "teardown": { "done": true, "volumes_removed": true, "images_removed": false, "error": null }, "warnings": [], "finished_at": "2026-10-11T08:20:33Z", "elapsed_seconds": 503.5 } ], "load_defined": true, "notes": [ "Host: a GitHub Actions runner (ubuntu-latest, 2 vCPU, 8 GB RAM; the CPU model varies between AMD EPYC generations, and each run records its own). The result is valid for that host only. There is no GPU or iGPU: hardware acceleration is not tested. Every transcode is software x264 inside the official jellyfin-ffmpeg.", "Keep-up rule, unchanged from the manual ladders of 2026-10-04 and 2026-10-06 (lab/notes/jellyfin-2026-10-04.md section 5, jellyfin-2026-10-06.md section 5): a player starts playing when its second segment has arrived; a later segment is late if it arrives after start + its playlist time; a level kept up when no player had a late segment. The speed per player is the speed= of the last progress line of each Jellyfin FFmpeg.Transcode log (an average since that ffmpeg started).", "Differences from the manual ladders: the library holds only the film that is played (the other 12 generated films are not needed and are not made), the encodings are ended with the API's DELETE /Videos/ActiveEncodings at the end of each level, the levels run one after another in one stack (the manual ladders ran on a stack that had already run a scan and transcodes), and a level 3 was added because two vCPUs are expected to hold about three streams. The stack is also being sampled by the harness (docker stats), as in the manual ladders.", "This app has no published result of its own yet. The headline Jellyfin figures stay with the jellyfin app.", "service jellyfin: bind mount /home/runner/work/claudeftw/claudeftw/lab/apps/jellyfin-ladder/media refers to a path on the daemon host; prefer named volumes so remote runs and `down -v` stay clean" ], "warnings": [], "files": { "compose": "jellyfin-ladder.compose.yaml", "env": null }, "definitions": { "memory": "cgroup working set as reported by `docker stats` (usage minus inactive file cache), MiB = 2^20 bytes", "cpu": "percent of ONE core as reported by `docker stats` (4 busy cores = 400)", "total": "stats over the sum of all containers at the same instant", "sample_interval": "docker stats --no-stream takes about 1-2 s per call, so samples are 2-3 s apart", "runs": "each run is a full fresh cycle (up, health, setup, settle, idle, load, down -v); the published figure is the median over the runs, shown with the min-max range; see summary.rule" } }