TransformaHow to Extract Audio from a Video on iPhone
You recorded a lecture, a concert, a podcast interview, or a voice memo on video, and now you just need the audio. Maybe you want to turn a video interview into a podcast episode, extract background music from a clip, or save a speech as an audio file for offline listening. Transforma strips the video track and keeps the audio, giving you a clean audio file in your choice of format with full control over quality settings.
Quick Answer
Open Transforma, select a video file (MOV or MP4), choose your audio output format (M4A for quality, MP3 for universal compatibility), set your preferred bitrate, and convert. The audio track is extracted on-device in seconds.
Why You Might Need This
- Turning video lectures, conference talks, and webinars into audio files for listening during commutes or workouts.
- Extracting podcast audio from video recordings without needing desktop editing software.
- Saving the audio from concerts, performances, and events as music files without the large video file.
- Creating audio clips from video for use in presentations, voice-overs, or social media content.
Step by Step
Open Transforma and select your video
Launch Transforma and choose the video file you want to extract audio from. Supported input formats include MOV, MP4, M4V, and 3GP.
Choose your audio output format
Select your preferred audio format: M4A (AAC) for the best quality-to-size ratio, MP3 for universal compatibility across all devices and platforms, WAV for uncompressed lossless audio, or FLAC for compressed lossless audio.
Adjust bitrate and trim if needed
Set the audio bitrate from 64kbps (voice-only content) to 320kbps (music quality). You can also set start and end points to extract only a specific portion of the video's audio track.
Convert and save
Tap convert to extract the audio. The process takes just a few seconds since the video frames are discarded entirely. Save to Files, or share via AirDrop, email, or cloud storage.
Tips for Best Results
- M4A (AAC) provides the best quality at the smallest file size for compressed audio. At 256kbps, AAC is considered 'transparent quality' for music, meaning most listeners cannot distinguish it from the uncompressed source.
- Choose WAV only if you need uncompressed, lossless audio for professional editing. WAV files are roughly 10x larger than equivalent M4A files (a 3-minute track is about 30MB as WAV vs 3MB as M4A at 256kbps).
- Use the trim feature to extract only the specific portion you need. This is especially useful for pulling a key quote from a long interview or saving a specific song from a concert recording.
- For voice-only content like lectures and podcasts, 128kbps in M4A or MP3 is more than sufficient. You can drop to 64kbps for spoken word and still maintain clear intelligibility while minimizing file size.
Frequently Asked Questions
What audio format should I extract to?
For most uses, M4A (AAC) at 256kbps gives you the best quality at a small file size. If you need maximum compatibility with older devices, car stereos, or simple MP3 players, choose MP3 at 256-320kbps. For professional editing or archival purposes, choose WAV or FLAC for completely lossless audio.
Does Transforma re-encode the audio or extract it directly?
When the source audio codec matches the output format (for example, extracting AAC audio to M4A from an MP4 file), Transforma can passthrough the audio stream without re-encoding, preserving the exact original quality. When a format conversion is needed (e.g., AAC to MP3), the audio is decoded and re-encoded at your chosen bitrate.
What video formats can I extract audio from?
Transforma supports audio extraction from MOV, MP4, M4V, and 3GP video files, which covers virtually all video content recorded on iPhones and received from other sources. These containers can hold AAC, ALAC, PCM, and other audio codecs that are all supported.
Can I trim the audio during extraction?
Yes, you can set precise start and end points to extract only a specific portion of the video's audio track. This is much more efficient than extracting the full audio and trimming afterward, since only the selected segment is processed and saved.
Try It Yourself with Transforma
Download Transforma and convert your first file in seconds.
