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Use two independent checks: supervise FFmpeg on the host to confirm the encoder is alive and making progress, then query YouTube’s Live Streaming API to confirm it is receiving the feed and report its health. Neither check alone proves that viewers are getting a healthy stream. Keep API failures and unknown health separate from confirmed stream failures so a monitoring hiccup does not trigger an unnecessary restart.
What a useful health check needs to detect
A 24/7 stream has at least two failure domains: the FFmpeg process and the path from FFmpeg to YouTube. A process can still exist while stalled or disconnected; conversely, an API request can fail even when FFmpeg is sending video. Monitor these as separate signals and expose distinct results rather than reducing everything to one green or red value.
- FFmpeg absent: the process has exited or cannot be found.
- FFmpeg stalled: the process exists but its output or media progress has not advanced within your chosen window.
- YouTube check unavailable: the API request failed, for example because of credentials, permissions, network trouble, or a temporary API error.
- YouTube feed inactive or in error: the stream resource reports that YouTube is not receiving data or reports an error.
- YouTube health bad or unknown: the health object reports configuration issues, or has no health data.
- Healthy signals: local progress is current, YouTube reports an active feed, and the health and broadcast states are consistent with the intended stream.
This division helps you choose the right response: restart a failed encoder, inspect ingest or configuration problems, or repair monitoring access without treating an API outage as a video outage.
Understand YouTube’s stream and broadcast signals
The incoming feed: liveStream
YouTube’s liveStream resource describes the feed sent to YouTube. Its status.streamStatus field reports the ingestion state. YouTube documents these values:
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active: YouTube is receiving data via the stream.created: the stream exists but has no valid CDN settings.error: an error condition exists.inactive: YouTube is not receiving the user’s stream.ready: the stream has valid CDN settings.
ready is not the same as active: it indicates valid settings, not that data is currently arriving.
Health and configuration issues
The same resource’s status.healthStatus.status field reports good, ok, bad, or noData. YouTube defines good as no issues at warning severity or worse, ok as no error-severity issues, and bad as at least one error-severity issue. noData means YouTube’s backend has no health-status information; treat it as unknown, not as healthy.
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Do not alert only on the summary label. Preserve configurationIssues[], including each issue’s type, severity, reason, and description, so an operator can see what needs attention. The object also includes lastUpdateTimeSeconds, a UNIX timestamp in seconds. Compare it with the current time and classify an old update as stale or unknown. The API documentation specifies the timestamp but no universal freshness threshold, so set one for your deployment.
The viewer-facing event: liveBroadcast
A liveBroadcast represents the event viewers see, not the incoming feed itself. Its lifecycle includes created, ready, liveStarting, live, complete, revoked, testStarting, and testing. The broadcast resource documentation describes these states. A broadcast can therefore be in a different state from the underlying stream; interpret both according to whether your channel is meant to be testing or live.
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YouTube requires the bound stream to have streamStatus=active before the broadcast can transition to testing or live. The transition method changes broadcast state and requires authorization. A monitor that only needs to report health should read status and alert, not change broadcast state automatically.
Build the local FFmpeg monitor
Run process supervision on the machine that launches FFmpeg, using its service manager or an equivalent watchdog. Capture the process exit status and logs, and track a progress signal tied to the actual FFmpeg invocation and media pipeline. Merely finding an FFmpeg process is insufficient: it might be blocked, disconnected, or producing unusable output.
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- Record process identity. Track the supervised service or process instance that runs the intended stream, rather than matching an overly broad process name that could belong to another FFmpeg job.
- Capture exit and restart events. Log when the process starts, exits, and is restarted, including its exit status and relevant FFmpeg log output.
- Track recent progress. Use an observable progress signal from the running invocation or media pipeline, then mark the local check stalled when that signal stops advancing for a deployment-specific interval.
- Report separate local states. Emit at least “absent,” “present but no recent progress,” and “progressing.” Do not label a progressing process as a healthy YouTube stream until the API check agrees.
The exact progress mechanism depends on how FFmpeg is launched, the host’s service manager, and the output path. The official YouTube API documentation does not prescribe an FFmpeg command, shell script, supervisor, or local progress threshold; validate implementation details against your host and FFmpeg build.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Query YouTube without confusing unknown with failure
Use authorized API access for the channel’s live resources. The broadcast list method can return the status part, filter by broadcastStatus (including active, all, completed, and upcoming), and use mine=true for the authenticated owner’s broadcasts. The method lists youtube.readonly as an accepted scope. The stream and broadcast resources answer different questions, so retrieve and inspect the relevant stream status as well as the broadcast state.
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- Authenticate for the channel. Ensure the account and authorization scope can read the intended live resources. A request error is a monitoring failure state, not proof the stream has stopped.
- Identify the intended stream and broadcast. Do not treat an unrelated active or upcoming broadcast as evidence about the 24/7 stream you mean to monitor.
- Read status fields. Preserve
streamStatus,healthStatus.status,lastUpdateTimeSeconds, configuration issues, and the relevant broadcast lifecycle state. - Apply explicit freshness and persistence rules. Decide how old a health update may be and how long a reported condition must persist before alerting. The API defines the fields, not your operational thresholds.
- Return structured output. Show stream state, health state, update age, issue details, broadcast state, and API-check result separately, with a timestamp for the check.
The list method documents permission and eligibility errors, including insufficient live permissions and live streaming not being enabled. Surface such errors as “API check failed” with the returned diagnostic; do not turn them into a claim that the stream is inactive.
Combine the checks into an alert and recovery policy
Keep detection and remediation separate. A local process exit is a reasonable condition for a service manager to restart FFmpeg, subject to a bounded retry policy. An API-reported inactive or error stream calls for examining FFmpeg logs and ingest connectivity. A bad health status should include the individual issue and severity. A noData result, stale health update, or failed API request should be reported as unknown or unavailable, not healthy.
Before enabling automatic recovery, define these choices for your stream. YouTube does not prescribe restart intervals, attempt limits, polling cadence, alert thresholds, or escalation rules.
- Failure condition: specify which local and YouTube states count as confirmed failure, and which mean unknown.
- Persistence window: require a condition to persist long enough to avoid reacting to a transient observation, while staying within your acceptable downtime.
- Restart policy: set a retry interval or backoff and a maximum number of restarts within a defined period to prevent a restart loop.
- Escalation: decide when to notify an operator, what information the alert includes, and when repeated failures require a human response.
- Audit trail: retain check results, API errors, issue details, process exits, and restart events so an operator can distinguish cause from symptom.
Do not restart FFmpeg just because one API request failed. Credential expiry, authorization problems, temporary API errors, network faults, and an actual ingest failure need different handling. The monitoring result should make that distinction visible.
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