Skip to content
All video conversions

RM to M4A converter

Convert RM to M4A in your browser. No upload and no account: the file never leaves your device, so the only size limit is your device’s memory.

I want M4A
Advanced 4
sec

Leave both at 0 for the whole file.

sec
Channels

Bytes of your files sent anywhere: 0 B

Related conversions

Other ways to convert RM

Convert other formats to M4A

Read more about the RM format and the M4A format, or see every video tool and all video conversions.

Should you convert RM to M4A?

Yes, when you only need the sound: a song from a music video, the audio of a lecture, or a voice recording to transcribe. The picture is left out and the soundtrack is saved as M4A.

RM is RealNetworks’ streaming video format from the dial-up era; M4A is AAC audio in an MP4 container, Apple’s everyday audio format. Use M4A for music and recordings on Apple devices, or anywhere AAC is accepted and size matters.

RM and M4A compared
Property RM M4A
What it is RealNetworks’ streaming video format from the dial-up era AAC audio in an MP4 container, Apple’s everyday audio format
Audio inside RealVideo with RealAudio (Cook) audio 128–256 kbps AAC
Plays on VLC and RealPlayer; nothing modern supports it Apple devices, Android, browsers and most players; some older car stereos, Windows apps and forms refuse it
Best for Nothing today; convert old downloads and archives Good-sounding audio at small sizes

How to convert RM to M4A

  1. 01

    Add your RM

    Drop your RM video onto the box, or click to choose it. It is read from your disk and stays there.

  2. 02

    Check the settings

    The output is already set to M4A. Change the bitrate if you want to; the defaults suit most files.

  3. 03

    Save the M4A

    Press convert and save the M4A. Several files come back together as a ZIP.

What changes when RM becomes M4A

From RealAudio (Cook) to AAC

RM soundtracks are usually RealAudio (Cook), so saving M4A is one more lossy step. 192 kbps suits music, 128 kbps is plenty for speech, and going above the original bitrate only makes the file bigger.

Video files without sound

Screen recordings and some exported clips have no audio track at all. The file is checked as soon as you add it, and you’ll be told before converting if there’s nothing to extract.

This page is put together from our notes on each format, choosing only what is true of RM and M4A, so every pairing states the same facts the same way. How these pages are made.

Why it doesn’t upload

Uploading a whole video to keep only its sound wastes time and data, and hands over the footage too. The audio track is read and saved right here, and the file never leaves your device.

How to check for yourself

Worth knowing

  • About the RM. RMVB files use variable bitrate and play at the wrong speed in some tools; converting gives a normal, steady MP4.
  • About the M4A. An .m4a can also hold lossless ALAC audio, several times larger; the extension alone doesn’t tell you which.
  • AVI, WMV, FLV and other older formats use the FFmpeg engine, a one-time 31 MB download.

Questions

Does extracting M4A from an RM lose quality?

The soundtrack is compressed again as M4A. At 192 kbps the difference from the original is inaudible for nearly everyone.

Can I get the audio from only part of the video?

Yes. Set a start and end time before converting, and only that section is saved as M4A.

Read more about this

Other tools