Extracting audio from video, step by step

1. Import

Load the video and let the tool probe the audio stream.

• Drop an MP4, MOV, MKV, WebM or AVI file; large files are read progressively.
• Read the detected sample rate, channel count and bitrate before exporting anything.
• Camera files are usually 48 kHz; screen recordings are often 44.1 kHz or 32 kHz.
• If the file has several audio streams, confirm which one you are pulling.

2. Settings

Choose a format that respects what is inside the container.

• Export to WAV 24 bit at the detected rate for anything going into an edit.
• Do not resample at this stage unless the delivery demands it; sync depends on the rate.
• Use MP3 only for transcription or review copies, never for a mix.
• Name the output after the video file so the audio stays matched to its picture.

Tip Extracting from a lossy container to WAV does not restore quality, but it stops further generation loss.

3. Export and ZIP

One video gives one audio file; a batch gives an archive.

• Press export and the audio file downloads directly.
• In batch mode, every extracted track is collected into one ZIP named after the batch.
• Keep the extracted audio in the same folder as the video, with the same base name.
• Do not rename after export or your NLE will lose the visual association.

4. Quality control

Sync problems come from rate mismatches, so check them first.

• Compare the audio duration with the video duration; they should match to the frame.
• Check the sample rate in the Audio Inspector against the rate detected on import.
• Line the extracted audio against the video in your NLE and check a clap or a hard consonant at the end of the clip.
• Listen to the last ten seconds: drift, if any, is always worst at the end.