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How-To Guide

How to Extract Audio from Video

Extracting audio from a video file is one of the most common media tasks — getting an MP3 from a music video, extracting dialogue from a recording, or archiving a podcast that was only published as a video. FFmpeg makes this instant, and VLC provides a GUI option. The audio can be extracted losslessly (from compatible containers) or re-encoded to MP3, AAC, or any other format.

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Step-by-step instructions

  1. 1

    Extract audio with FFmpeg (recommended)

    Lossless extraction (keeps original codec): `ffmpeg -i input.mp4 -vn -c:a copy output.m4a` (AAC from MP4). Re-encode to MP3: `ffmpeg -i input.mp4 -vn -c:a libmp3lame -q:a 2 output.mp3`. Re-encode to AAC: `ffmpeg -i input.mp4 -vn -c:a aac -b:a 192k output.aac`. The `-vn` flag disables video output — only the audio track is written.

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  2. 2

    Extract audio with VLC

    Open VLC → Media → Convert/Save → Add your video file → click Convert/Save. In the Profile dropdown, select Audio - MP3 (or AAC). Set an output filename with .mp3 extension. Click Start. VLC re-encodes the audio — good for occasional use without command-line access.

  3. 3

    Extract audio with Audacity

    Open Audacity → File → Import → Audio → select the video file. Audacity imports the audio track only. Edit if needed (trim, normalise volume). Export: File → Export → choose format (MP3, WAV, FLAC, OGG). Audacity is useful when you want to edit the audio before saving.

  4. 4

    Choose the right output format

    For sharing and streaming: MP3 (widest compatibility) or AAC (better quality, smaller size). For high quality archiving: FLAC (lossless). For phone ringtones: MP3 or M4A. For podcasts: MP3 at 128 kbps mono. For music: MP3 at 320 kbps or AAC at 256 kbps. If the video already has AAC audio, extract losslessly: `ffmpeg -i input.mp4 -vn -c:a copy output.m4a`.

Why convert MP4 to MP3?

Video files often contain the audio content you want — music videos, recorded lectures, podcast episodes published as video, or interview recordings. Extracting the audio saves storage and lets you listen on any audio device.

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Frequently asked questions

Can I extract audio from video without losing quality?
Yes — if the video contains AAC audio (common in MP4), extract it losslessly: `ffmpeg -i input.mp4 -vn -c:a copy output.m4a`. This copies the audio stream without re-encoding — zero quality loss, instant. If the video has MP3 audio (AVI files), extract as MP3: `ffmpeg -i input.avi -vn -c:a copy output.mp3`.
How do I extract audio from a YouTube video?
You'd need to download the video first (yt-dlp is a popular command-line tool: `yt-dlp -x --audio-format mp3 URL`). Note: downloading YouTube videos may violate YouTube's terms of service. Only download content you own or have permission to use.
What if the video has multiple audio tracks?
List all tracks: `ffprobe -v error -select_streams a -show_entries stream=index,codec_name -of csv=p=0 input.mkv`. Extract a specific track: `ffmpeg -i input.mkv -map 0:a:1 -vn output.mp3` (where 0:a:1 is the second audio track). HandBrake also lets you select which audio track to include in the output.
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