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Diagnostica Passo Dopo Passo

Rilevatore Blocco Fotocamera

When a camera will not show video, the cause is usually one of four different things — a browser permission block, an OS-level privacy block, a driver or hardware conflict, or a genuine physical lens cover — and each needs different guidance. This runs an actual sequence of checks and tells you which one you are dealing with, rather than guessing from a single symptom.

Fotocamera spenta

Controlli

Fasi della Diagnostica

  • 1. Stato del permesso del browser:Controllo in corso…

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  • 2. Test dello stream della fotocamera:In attesa

Clicca su "Esegui Diagnostica Completa" sopra per iniziare.

  • 3. Controllo del contenuto del fotogramma:In attesa

Viene eseguito dopo che il controllo dello stream ha successo.

Note

Cosa significa realmente ogni risultato

Permesso del browser negatoIl browser stesso sta bloccando l'accesso. Risolvibile dall'icona della fotocamera nella barra degli indirizzi o dalle impostazioni sulla privacy del browser stesso.
Blocco a livello di sistema operativo (il browser dice concesso, lo stream continua a fallire)The most commonly missed cause — an operating-system privacy toggle sitting behind an already-granted browser permission. Check your OS's camera privacy settings directly.
Nessun dispositivo trovatoHardware or driver issue — the browser cannot see any camera at all. Check cables, Device Manager, or whether the camera is disabled in the OS.
Impossibile avviare (in uso)Almost always another application already holds the camera open. Close other video apps and tabs first.
Attiva ma sembra copertaPermission and stream both succeeded, but the image itself is near-uniformly black — consistent with a physical lens cover or privacy shutter left closed.

What this cannot check

No web page — this one included — can see other browser tabs, other applications, or background system processes. That is a deliberate security boundary, not a limitation of this specific tool. If you need to know exactly which application currently holds your camera, that information only exists at the operating-system level: Windows' camera privacy settings and Task Manager, or macOS's camera indicator and Activity Monitor, both show this directly.

Riferimento di Benchmark

Codici di Errore Reali del Browser

Nome erroreDiagnosiRipara
NotAllowedError (perm. concesso)Blocco a livello di sistema operativoControlla le impostazioni sulla privacy della fotocamera del sistema operativo.
NotAllowedError (perm. non concesso)Permesso del browser negatoClicca sull'icona della fotocamera nella barra degli indirizzi.
NotFoundErrorNessun dispositivo trovatoControlla i cavi, Gestione dispositivi, o la disabilitazione a livello di sistema operativo.
NotReadableErrorFotocamera in uso altroveChiudi altre app/schede che usano la fotocamera.
OverconstrainedErrorIncompatibilità dei vincoli, non bloccataNot actually inaccessible — request different settings.

These are the real, standard error names getUserMedia reports — this tool reads yours directly rather than guessing.

Passo Dopo Passo

Come Eseguire la Diagnostica

  1. Clicca su "Esegui Diagnostica" — non serve alcuna configurazione.
  2. Rispondi alla richiesta di permesso se ne appare una.
  3. Read the three-step readout: permission state, stream attempt result, and a frame-content check for physical obstruction.
  4. Segui l'indicazione specifica mostrata per l'errore effettivamente rilevato, se presente.

Domande Comuni

Domande Frequenti

Un sito web può sapere se un'altra app sta spiando la mia fotocamera?
No, and any tool that claims to is not being straight with you. Browser security is specifically designed so a web page cannot see other tabs, other applications, or background processes — that isolation is a core protection, not a gap. This tool reports what a page genuinely can see: its own permission state and stream errors, plus a check of whether the live image looks physically obstructed.
My camera light is off but an app says it's in use — what's happening?
On the large majority of modern webcams, the indicator LED is wired directly to the camera's power rail specifically so software cannot disable it while hiding sensor activity. If the light is genuinely off, the sensor is almost certainly not capturing. Check your OS's own camera-usage indicator or Task Manager / Activity Monitor for which process actually has it open.
Cosa significa NotReadableError?
The camera was found but the operating system would not hand it over to the browser — almost always because another application already has it open. Close other video apps and browser tabs using the camera and try again.
Come controllo quale app sta usando la mia fotocamera su Windows o Mac?
Windows 10 and 11 show a camera-in-use indicator in the system tray, and Settings → Privacy → Camera lists recent app access. macOS shows an orange/green indicator light plus, in recent versions, a dot in the menu bar you can click to see which app is using the camera or microphone.
Perché dice "permesso concesso" ma la fotocamera continua a non avviarsi?
That specific contradiction — browser reports granted, stream still fails — is the clearest signature of an OS-level privacy block sitting behind an already-approved browser permission. It means something outside the browser, not the browser itself, is the actual blocker.