Codecs

How to play AC-3 (Dolby Digital) files without buying a codec

AC-3 (Dolby Digital) is an audio codec — the way the sound is compressed. You find it inside .mkv, .mp4, .ts, .vob files.

Updated 2026-11-08

At a glance

Also calledDolby Digital
Found inside.mkv, .mp4, .ts, .vob

Why it doesn’t play

AC-3 (Dolby Digital) plays only sometimes: Windows needs paid or extra extensions for some codecs, and browsers skip many of them. That is why one AC-3 (Dolby Digital) file plays and the next shows a black screen or no sound.

Where it plays

PlayAnyVideo (web, Windows, Android)Plays
Chrome / Edge on their ownSometimes / paid extension
Windows Movies & TV / Media PlayerSometimes / paid extension

Play it free with PlayAnyVideo

  1. 1

    Open the PlayAnyVideo player in your browser — nothing to install — and drop the file in. Files never leave your device.

  2. 2

    If the browser can’t decode it, the built-in universal engine (open-source, LGPL) takes over automatically.

  3. 3

    For the heaviest files (4K/8K HEVC, DTS, TrueHD) install the free Windows app: it converts on the fly with your graphics card and plays everything.

  4. 4

    On Android, choose “Open with → PlayAnyVideo” from your file manager or messenger.

FAQ

Is it really free?

Yes. PlayAnyVideo has no ads, no paid codecs and no locked features.

Is my AC-3 (Dolby Digital) file uploaded anywhere?

No. Playback happens on your own device; local files are never sent to a server.

Do I need a codec pack?

No. Codec packs can break other players and often bundle adware. PlayAnyVideo brings its own decoders.

Related guides

All guides