How-to guide
How to extract audio from a lecture recording
Lecture recordings come from every direction: Panopto, Echo360, Kaltura, Zoom, phone captures, classroom podium cameras. Almost all of them end up as MP4 or MOV, and VideoSplit turns any of them into a clean audio file for studying or transcription in seconds.
For students preparing for exams, audio-only lecture files are about 10x smaller than the original video and can be listened to at 1.5–2x speed without losing clarity. MP3 at 192 kbps is plenty for speech.
Step-by-step
- Download the lecture video. Most LMS tools (Canvas, Moodle, Blackboard) offer a download link for recordings you are enrolled in. Save the MP4.
- Open VideoSplit.io. Any browser. Because it is client-side, you can process lecture recordings even on restricted campus networks.
- Drop the lecture onto the page. Drag and drop. Long lectures (90+ minutes) will be larger files but still process locally.
- Pick MP3 for listening on the go. MP3 at 192 kbps is the sweet spot for speech: tiny file, fully intelligible.
- Download the audio. Transfer to your phone and listen while walking or commuting.
Tips for better results
- For revision, listening at 1.5x speed in a podcast app roughly doubles the amount of lecture content you can cover.
- If the lecture has slides narrated over the video, the audio alone still captures the complete verbal explanation.
- Students with dyslexia or visual impairments can feed the extracted WAV directly into a TTS or ASR tool like Whisper for live captioning.
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