Convert WebM to M4A
Settings
No file yet
Settings appear after you choose a file.
Saved a WebM clip and want to hear it on an iPhone, iPad, or Mac? Keep only the sound as an M4A, a file with no video in it that plays in the Apple music apps.
WebM or M4A?
Keep WebM when
- You still need the picture. An M4A holds only the sound.
Pick M4A when
- You want only the sound of a video, as a small audio file.
- The sound goes to a player or app that takes M4A.
About WebM and M4A
WebM
An open video format made for the web. Common for screen recordings and clips saved from sites, less so in media players.
M4A
AAC audio that plays in iTunes and Apple Music. Common for songs and voice recordings.
Questions
Does the sound change?
Yes. WebM sound is Opus or Vorbis, and every line and app here encode it again as AAC, which loses a little.
Which bitrate should I pick?
The commands aim for 192 kbps, a common middle ground between size and sound. Change -b:a 192k to 128k for a smaller file or 256k for more detail.
What happens to the video?
It is left out. The M4A holds only the sound of the WebM, and the Terminal lines drop the picture with -vn.
Do the title and artist stay?
With the FFmpeg lines, yes: FFmpeg carries tags such as the title across to the M4A.