Reduces first-segment latency on cache MISS so the player doesn't sit on
"preparando sesión". Three independent levers:
1. ProbeFile memoised by (path, mtime, size) for 30 min — second play of
the same source skips ffprobe (1-3 s on 50+ GB MKVs).
2. HLS encoder presets biased for latency over quality:
- libx264 default veryfast → superfast (~15-20% faster, marginal
quality loss at 5-25 Mbps target bitrates).
- NVENC: -preset p4 -tune hq → -preset p3 -tune ll. First-segment
~0.8 s on RTX-class GPUs (was ~1.5 s).
- QSV: -preset medium → -preset veryfast (keeps look_ahead=0).
- VideoToolbox: adds -realtime 1 (was unset). Bitrate args still
drive rate control; -q:v dropped to avoid the silent conflict
where ffmpeg ignored it under -b:v.
3. Per-session log surfaces encoder + accel + preset so "first-start
was slow" complaints can be triaged from the journal alone.
Diagnostic helpers (DetectHWAccelDiagnostic + HWAccelDiagnostic) added
for future wiring into daemon startup / agent register; users today can
already inspect via `unarr probe-hwaccel`.
Web: AgentsTab profile page now shows the agent's chosen encoder
(amber if software libx264, green if HW) plus the transcode-resolution
cap. Hidden for pre-0.9.9 agents that haven't reported hwAccel.
Gives the daemon a public HTTPS hostname (`https://<random>.trycloudflare.com`)
so the in-browser player on torrentclaw.com plays cross-network without
Tailscale or port forwarding — the mixed-content block that was breaking
HTTPS-page → HTTP-daemon fetches is gone. Bytes proxy through CloudFlare,
never through TorrentClaw infra (preserves the aggregator legal posture).
New surface:
• `internal/funnel/` package: subprocess wrapper + auto-download for
cloudflared. Linux amd64/arm64/armhf/386 fetched from GitHub releases
on first run, validated by ELF magic + size sanity, O_EXCL partial
write so concurrent daemons don't clobber each other.
• `unarr funnel on/off/status` cobra command (sibling of `unarr vpn`).
• Daemon supervisor goroutine keeps cloudflared up across crashes + CF's
~6h Quick Tunnel rotation. Exponential backoff (2 s → 5 min). On exit
the reported URL is cleared so the web stops handing out a dead host.
• Wire: agent registers/syncs a FunnelURL field; web prefers it over
Tailscale/LAN for in-browser playback (HlsStreamPlayer + Stremio
addon).
Default ON for fresh installs (NAS/Docker get it without terminal-in);
existing configs that pre-date the feature stay off until the operator
opts in with `unarr funnel on`.
Docker image now bundles cloudflared (built per TARGETARCH via buildx).
Also fixed: libx264 'frame MB size > level limit' on anamorphic >16:9
sources. The level we hint to libx264 was derived from height alone,
which busted on 720p cinemascope (1728×720 = 4860 MBs > level 3.1's
3600). Bumped each tier: 720p → 4.0, 1080p → 4.1.
Version: 0.9.4 → 0.9.5.
Three related fixes around 4K-source transcoding that left the web
player stuck on "preparing session" with no useful diagnostics:
1. Dynamic -level:v derived from output height (hls.go, transcoder.go).
The previous fixed "4.0" silently rejected anything taller than 1080p
inside libx264 — "frame MB size > level limit", "DPB size > level
limit" — and emitted unplayable segments. Helper H264LevelForHeight()
now picks 4.0 / 5.0 / 5.1 / 6.0 from the actual encode height.
2. New `unarr probe-hwaccel` diagnostic command. Lists the HW encoders
compiled into ffmpeg, the device files / drivers present, and the
backend the daemon would actually pick today. Surfaces the canonical
gotcha: a host with an RTX 3090 + nvidia-smi but a Homebrew ffmpeg
built without --enable-nvenc still falls back to libx264 software.
3. Register payload now includes hwAccel + maxTranscodeHeight so the web
side can suggest a smaller alternate quality before the user even
tries to play a 4K source on a software-only host. Software-only =
1080p cap, any HW backend = 2160p cap.
