MP4 to MP3 File Converter extracting an audio track from MP4 video into an MP3 audio file.

When there is a need to convert MP4 video into the MP3 audio format?

Let’s take a look at the following use-cases.

For example, you have an MP4 video file, that is:

• a personally recorded video
• a music track, audio-book or educational video downloaded from YouTube or from other video-hosting platforms

There might be the following reasons to convert the video file (MP4) into an audio format (MP3 audio file):

• to share the audio file with a friend or colleague - an MP3 file consumes much less space than an MP4 video file and thus can be sent per E-Mail or in the messenger. This is especially important when you download the file on your mobile device - the MP3 file can be transferred much faster.
• to listen to the audio file on your personal device (on the phone, tablet, or MP3 player). When there is no need to watch the video and you just want to listen to the audio track.

As we found, converting an MP4 video file into MP3 audio file format might save you a large amount of space on the device, and might save you some time for transferring this file into another device or sharing it online.

To convert a video file into the audio file format - use our MP4 to MP3 Online Converter presented on this page.

When the MP4 file is converted into MP3 format, we extract an audio track from the MP4 container and convert the audio track into an MP3 file format.

The conversion process takes a small amount of time (depending on the video file size) and produces the result in an MP3 format that can be instantly downloaded to your device.

It is possible to choose the bitrate of the MP3 audio file, using one of the following values:

• Default - this means the converter will keep the bitrate of the source audio track from the MP4 file
• 96 Kbps - this bitrate is suitable for low-quality audio, to have the smallest file size
• 128-256 Kbps - bitrate for different grades of quality, the higher bitrate means the higher quality (and the larger file size) the output file will have
• 320 Kbps - bitrate for the best audio quality that can be provided by MP3 format

Please note, to save the audio with the higher-quality bitrate (like 320 Kbps), you should have a source MP4 file containing the audio track in the same high-quality bitrate format.

MP4 file format is a digital multimedia container format, full name is MPEG-4 Part 14 (Link to the specification - https://www.iso.org/obp/ui/#iso:std:iso-iec:14496:-14:ed-3:v1:en).

Where MPEG stands for the “Moving Picture Experts Group” - a standardization alliance.

MP4 is a file format that can contain both - video-track and audio-track (tracks) information. Video and data stored inside MP4 in a form of data streams and can be used for streaming the video and audio. MP4 is a container format, which means that the video (and audio) itself can have another file format.

For example, video format inside YouTube videos can be:

• AVC (Advanced Video Codec)

And Audio format:

• AAC (Advanced Audio Codec)

MP3 represents a binary coding format for digital audio (Link to the standard - https://www.iso.org/standard/26797.html).

MP3 uses lossy data compression, which gives a smaller file size (comparing to the uncompressed audio data) but lower audio quality because part of that data gets discarded.

MP3 format can contain data in a different bitrate, (96 Kbps, 128 Kbps, etc up to 320 Kbps). It might also have a variable bitrate.

How do I convert an MP4 file to MP3?

Can MP4 file be converted to MP3?