How can I extract audio losslessly from a video on my windows 10 pc?

AVIDemux,  a free and open-source video editor that excels at straightforward tasks like cutting, filtering, and, crucially, direct stream copying. Its core functionality makes it an effective tool for losslessly extracting audio by demuxing the original audio track from a video container without any re-encoding, provided the correct settings are used.

How to extract audio from video losslessly

Step 1: Open your video file in AVIDemux.

Step 2: In the left panel, set the "Output Format" to an audio-only format (e.g., MP3 Muxer or AAC Muxer—choose the one matching your source audio type).

Step 3: Directly below the video preview, ensure the "Audio" dropdown menu is set to "Copy".

Step 4: Go to File > Save and choose a filename and location. The process will quickly extract audio from the video files.

In summary, AVIDemux provides a lean and efficient path for perfect audio extraction via its stream-copy muxing function. While its interface can feel dated, it is a powerful and reliable choice for this specific task when configured correctly.