How to Record Audio from Video on Mac

Why Can't Mac Record Audio from a Playing Video by Default?

Core Audio, the system-level audio framework in macOS, manages audio streams between applications and hardware output devices. When a video plays in Safari, Chrome, QuickTime Player, or any other application, the audio data flows from the app to the active output device. Core Audio does not provide a software tap point where a recording application can intercept that stream. Windows includes WASAPI loopback capture natively, but macOS has never offered an equivalent.

QuickTime Player's New Audio Recording option lists only physical microphones and connected audio interfaces as input sources. The same limitation applies to the macOS Screenshot toolbar (Cmd+Shift+5), which allows microphone selection but cannot capture audio playing from a video in a browser tab or media player. Any audio-producing application on Mac faces the same Core Audio restriction on the output side.

Apple designed this separation intentionally. Audio output routes to hardware for playback, and audio input reads from hardware microphones. Bridging the two requires a virtual audio driver that sits between the system output and a recording application's input, creating a software loopback path that macOS does not include out of the box.

How Do You Record Audio from Any Video on Mac with LitLink?

• Download and install LitLink free from litpads.io, requires macOS 14 Sonoma or later
• Open LitLink and toggle System Audio Passthrough on creates the LitLink Audio Bridge virtual input device automatically
• Open your recording app (QuickTime, Audacity, OBS) select LitLink Audio Bridge as the audio input source
• Select LitLink Audio Bridge as the input device the recorder now reads all system audio including video playback
• Play the video you want to capture audio from YouTube, Netflix, local file, or any browser-based player
• Press record in the recording app video audio flows through LitLink Audio Bridge into the recorder at full quality
• Stop recording when the segment you need finishes audio is saved as uncompressed PCM at the system sample rate

LitLink works with every video source on macOS because it captures at the system level. The driver intercepts audio after Core Audio mixes all application outputs, so the audio from any video player, any browser tab, and any streaming service reaches the LitLink virtual audio driver regardless of the source application. Safari, Chrome, Firefox, Arc, QuickTime Player, VLC, and IINA all send audio through Core Audio, and LitLink captures all of them identically.

Audio captured through LitLink Audio Bridge is bit-perfect. LitLink passes raw PCM buffers between the system output and the virtual input device with sub-millisecond latency. The recording application receives the exact same audio data that would reach your speakers, at the same sample rate (44,100 Hz or 48,000 Hz depending on your system configuration). No transcoding, re-encoding, or quality loss occurs during capture.

Which Video Sources Can You Capture Audio From?

LitLink does not inspect or filter by application. The virtual audio driver captures the mixed system output, which includes audio from every running application simultaneously. If two videos play at the same time in different browser tabs, both audio streams are captured together. Users who need to isolate a single video source should pause or mute all other audio-producing applications before recording.

DRM-protected content from streaming services plays audio through Core Audio like any other source. The audio stream that reaches your speakers is the same stream that LitLink routes to the recording application. LitLink does not bypass any DRM encryption. The driver simply creates a loopback path for audio that macOS already decrypts and sends to the output device during normal playback.

How Do You Record Audio from Video While Hearing It Through Headphones?

Monitoring audio while recording is essential for capturing the right segment of a video. Without a multi-output device, selecting the virtual audio driver as the system output would silence your headphones because all audio would route exclusively to the recording application. LitLink solves this automatically. The moment you enable System Audio Passthrough, LitLink creates the "LitLink + Speakers" multi-output device and sets it as the system output. Audio splits to both destinations at the Core Audio level.

The monitoring path adds no perceptible latency. Both the headphone output and the LitLink Audio Bridge virtual input receive audio from the same Core Audio buffer cycle. The recording application and your ears process the same audio at the same time, so you can start and stop recording at precisely the right moments during video playback. This makes LitLink particularly useful for capturing specific clips from long videos or recording internal audio on Mac from live streams where timing matters.

Users who prefer a specific output device (USB audio interface, external DAC, Bluetooth headphones) can select that device in System Settings before enabling LitLink. The multi-output device will pair LitLink Audio Bridge with whatever output device is currently selected. Switching headphones or speakers after enabling passthrough requires toggling System Audio Passthrough off and on again to rebuild the multi-output device with the new hardware.

Which Recording Apps Work Best for Capturing Video Audio on Mac?

QuickTime Player is the right choice when speed matters. The application is preinstalled on every Mac, requires no configuration beyond selecting LitLink Audio Bridge from the input dropdown, and starts recording immediately. The output format is M4A (AAC), which is compatible with every major audio and video editor. QuickTime recordings are limited to stereo and do not offer waveform editing, so users who need to trim or process the captured audio should use Audacity instead.

Audacity is the best free tool for users who want to edit the captured video audio after recording. The waveform editor allows precise trimming to remove silence at the beginning and end, normalization to match volume levels across multiple clips, and noise reduction to clean up background hiss. Audacity exports to every common audio format. The per-pad EQ and audio processing features in LitPads complement Audacity for users who also work with soundboard audio alongside video capture.

How Do You Record Audio from a Local Video File Without Playback?

FFmpeg is a free command-line tool that processes audio and video files without requiring playback. The basic command for extracting audio from a video file is: ffmpeg -i input.mp4 -vn -acodec copy output.aac. The -vn flag tells FFmpeg to skip the video stream, and -acodec copy extracts the existing audio track without re-encoding. The process completes in seconds regardless of video length because FFmpeg reads the file at disk speed rather than playback speed.

Installing FFmpeg on macOS requires Homebrew (brew install ffmpeg) or a manual binary download. Users comfortable with Terminal will find FFmpeg the fastest option for batch-extracting audio from multiple local video files. The tool supports every container format (MP4, MOV, MKV, AVI, WebM, FLV) and every audio codec (AAC, MP3, FLAC, Opus, Vorbis, PCM).

FFmpeg cannot extract audio from streaming video services like YouTube or Netflix because those services deliver encrypted streams that are only decrypted during real-time playback. LitLink is the right tool for capturing audio from streaming video, browser-based players, and any video that is not a local file. LitLink captures audio in real time as the video plays, which means the recording takes exactly as long as the video segment. FFmpeg handles local files instantly. The two tools complement each other for different video audio capture scenarios.

Can You Record Video Audio and Microphone Commentary Together?

• Enable System Audio Passthrough in LitLink captures all video and system audio
• Toggle Mic Passthrough on adds your physical microphone to the LitLink Audio Bridge mix
• Select your microphone from the LitLink dropdown built-in mic, USB microphone, or audio interface input
• Choose LitLink Audio Bridge as the input in your recording app receives both video audio and voice commentary

Recording voice commentary over video audio is a common workflow for reaction videos, tutorial narration, and podcast episodes that reference video content. LitLink's mic passthrough eliminates the need to record two separate tracks and synchronize them in post-production. The microphone signal and system audio are mixed at the driver level before reaching the recording application, with under 1 millisecond of latency between the two sources because both streams pass through the same Core Audio buffer cycle.

Professional users who need separate tracks for voice and video audio can use two input sources in OBS or Logic Pro. One source reads from LitLink Audio Bridge with mic passthrough disabled (system audio only), and the second source reads from the physical microphone directly. This approach allows independent volume control, EQ, and noise processing on each track during editing. The combined single-track method through mic passthrough is simpler and sufficient for most reaction-style and commentary recordings. Users who also screen record with audio on Mac will find the same mic passthrough feature essential for capturing both desktop video and narration simultaneously.