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feat(agent): send full transcoder diagnostic in register payload (0.9.12)

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Daemon now runs engine.DetectHWAccelDiagnostic at startup (instead of the
lighter DetectHWAccel) and ships the full picture — ffmpeg version,
resolved binary path, HW encoders compiled in, device files / drivers
detected — up to the server in the RegisterRequest payload.

Why: the most common cause of slow first-play is a software-only ffmpeg
build. Surfacing the diagnostic in the web AgentsTab "Diagnose
transcoder" modal lets a user see *why* their backend landed on libx264
(e.g. brew's default formula ships without --enable-nvenc, or the
container is missing /dev/nvidia0) without SSHing in to run `unarr
probe-hwaccel` manually.

Also emits a single `[transcode]` startup log line summarising the same
data — convenient for `journalctl --user -u unarr | grep transcode`.

Bounded by a 10 s context so a hung ffmpeg binary can't stall daemon
startup forever.
This commit is contained in:
Deivid Soto 2026-05-27 12:48:40 +02:00
parent 287685427a
commit eb109f70ac
5 changed files with 59 additions and 3 deletions
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18
internal/cmd/daemon.go
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@ -143,7 +143,19 @@ func runDaemonStart() error {
// is what the web side uses to decide whether the user should pre-empt
// transcoding by downloading a smaller version (4K source on a software
// libx264-only host is the canonical case where pre-download wins).
hwAccelPick := engine.DetectHWAccel(context.Background(), cfg.Library.FFmpegPath)
//
// Use the full diagnostic (encoders + devices + ffmpeg version) instead
// of just the picked backend — the extra fields ride along in the
// register payload so the web "Diagnose transcoder" modal can show *why*
// libx264 was selected on a host with a GPU (e.g. brew's ffmpeg without
// --enable-nvenc). 10 s ceiling so a hung ffmpeg binary can't stall
// startup forever.
ffmpegResolved, _ := mediainfo.ResolveFFmpeg(cfg.Library.FFmpegPath)
probeCtx, probeCancel := context.WithTimeout(context.Background(), 10*time.Second)
hwDiag := engine.DetectHWAccelDiagnostic(probeCtx, ffmpegResolved)
probeCancel()
log.Println(hwDiag.LogLine())
hwAccelPick := hwDiag.Pick
maxTranscodeHeight := 1080
if hwAccelPick != engine.HWAccelNone {
maxTranscodeHeight = 2160
@ -162,6 +174,10 @@ func runDaemonStart() error {
ScanPaths: library.ResolveScanPaths(cfg.Download.Dir, cfg.Organize.MoviesDir, cfg.Organize.TVShowsDir, cfg.Library.ScanPath),
HWAccel: string(hwAccelPick),
MaxTranscodeHeight: maxTranscodeHeight,
FFmpegVersion: hwDiag.FFmpegVersion,
FFmpegPath: hwDiag.FFmpegPath,
HWEncoders: hwDiag.Encoders,
HWDevices: hwDiag.Devices,
AutoUpgrade: cfg.Daemon.AutoUpgradeEnabled(),
}