Fixing blank recordings, no camera, or no mic audio
Diagnose and fix a recording with no screen content, a missing camera feed, or missing microphone audio.
Updated 2026-07-23 · AutoCast v3.0 · macOS 14+
Who this is for
Anyone whose AutoCast recording came out blank, silent, or missing the camera overlay.
Before you start
Know which symptom you’re seeing — the fix differs depending on whether it’s the screen, the camera, or the microphone that’s missing:
Recording plays back as a blank or black screen.
Camera overlay never appears, or the preview was blank before you even hit record.
Video plays back with no microphone audio.
Steps
Blank or black screen recording
Open System Settings → Privacy & Security → Screen Recording.
Confirm AutoCast is listed and its toggle is enabled. If it’s missing, click + to add it, or re-trigger the permission prompt by clicking Record in AutoCast again.
Relaunch AutoCast. macOS does not apply a Screen Recording permission change until the app fully quits and reopens — this is the single most common cause of a blank recording.
No camera feed
Check that the camera is actually enabled for this recording in AutoCast’s Record panel — it’s an optional toggle, not on by default.
Open System Settings → Privacy & Security → Camera and confirm AutoCast is enabled. Relaunch AutoCast after changing it.
Check for exclusive access conflicts. Some apps (video call software, other camera utilities) hold exclusive access to the camera while running. Quit other apps that might be using the camera, then reopen AutoCast.
Confirm the correct camera is selected as the input device in AutoCast’s Record panel, if you have more than one connected (e.g. a built-in FaceTime camera and an external webcam).
No microphone audio
Open System Settings → Privacy & Security → Microphone and confirm AutoCast is enabled. Relaunch AutoCast after changing it.
Check that the correct input device is selected in AutoCast’s Record panel — audio can be silently recorded from the wrong mic if you have multiple inputs (e.g. built-in mic vs. a USB or Bluetooth microphone).
Check for another app holding exclusive access to the microphone, such as a call or conferencing app running in the background — quit it and try recording again.
What you should see
A live preview of your screen (and camera, if enabled) in the AutoCast recording window before you hit record, and a visible input level moving on the microphone indicator when you speak.
Common issues
Permission looks enabled but the recording is still blank — you likely changed the permission without relaunching AutoCast. Quit the app completely (not just close the window) and reopen it.
Camera worked yesterday, blank today — another app (often a video conferencing tool left running in the background) may have grabbed exclusive access; quit it and retry.
Still no audio after checking input device and permissions — see Fixing dubbing and export failures if the issue only shows up in the dubbed track, not your original recording.