Audio Codec Not Supported (7 Fixes for Windows, Mac, Smartphone & TV)

‘I successfully transferred an important presentation video to my Windows laptop, but when I played the video file in my Windows Media Player, an error popped up – ‘Windows Media Player cannot play the file because the required video codec is not installed on your computer.’

I tried playing this video in the VLC player, but I got an error: ‘A codec is required to play this file.’

What’s the fix? – Marcus Vance, California

One “Plex” user described rebooting everything, reinstalling the app, and still getting silence where sound should be, the actual cause turned out to be a settings toggle that got silently reset by an app update. It’s a familiar story: you try the obvious fix, it doesn’t work, and the error keeps coming back. 

This guide covers why the error happens, how to identify the codec causing it, and step-by-step fixes for Windows, Mac, Android, iPhone, smart TVs, streaming devices, and browsers.

Why Does “Audio Codec Not Supported” Happen?

 The problem stems from the video player being unable to decode the audio format in your video file. Video files are actually “containers” (like MP4 or MKV) that hold separate video and audio tracks. If your media player lacks the specific codec needed to translate that audio track (like DTS, AC3, or TrueHD), the sound won’t play, or you’ll see errors like “Audio Codec Not Supported.”

• Our experts have identified four major causes behind the ‘Audio codec not supported’ error.” A missing or outdated codec on the device
•  A player or app that doesn’t license that codec, such as AC3 or DTS being dropped from some Android and iOS apps
• An outdated media player or operating system
• File corruption or a broken header, which can also trigger a codec error even when the codec itself is fine

What NOT to do when you get the “Audio Codec Not Supported” Error?

If you encounter “audio codec not supported” error, here’s what you should not do:

• Installing multiple codec packs at once, which can create conflicts instead of fixing the error
• Assuming every playback issue is a codec problem when file corruption produces the same symptoms
• Downloading codec packs from unverified sites, which risks bundled adware
• Repeatedly reinstalling the same player without checking which specific codec is missing first

Why Audio Codecs Aren’t Supported

Not every player supports every codec. Experts at Stellar recommend ensuring the supported formats are being used.  

Before You Fix “Audio Codec Not Supported” Error

Before applying a fix, you need to confirm the codec. Here’s how you can do it. 

MediaInfo: 

• install the free tool
• drag the file into it
• look under the Audio section for the codec name

VLC: 

• open the file in VLC
• go to Tools > Codec Information
• check the Codec field under the audio stream

Knowing the exact codec (for example, AC3 versus AAC) helps you pick a targeted fix instead of trying every other option.

Fixes for “Audio Codec Not Supported” by Device Platform

Windows Media Player

Windows Media Player has limited native codec support, which makes it the most common source of an audio codec not supported Windows Media Player error.

• Switch to VLC or another universal player 
•  If staying with Windows Media Player, install a codec pack such as K-Lite
• Update Windows Media Player and Windows, because older generation miss newer codecs

VLC Media Player

VLC supports most codecs out of the box, so an error here usually means an outdated build or a damaged file.

• Update VLC to the latest version
• Check Tools > Codec Information to confirm the audio codec

If the codec shows as supported but there’s no sound, the file is likely corrupted rather than incompatible.

Mac (QuickTime)

QuickTime supports a narrower codec range than VLC, so AC3, DTS, and some FLAC files often fail here.

• Open the file in VLC or IINA 
• Convert the file to AAC or MP3 audio, if QuickTime is required 

Android and iOS(iPhone)

The “Audio Codec Not Supported” error on Android or iPhone stems from the external software rather than the phone’s hardware. It happens because proprietary formats like DTS and Dolby require specific coding licences.

While iPhone natively handles Dolby (AC3) at the operating system level, neither platform includes built-in system support for DTS. If the media application itself does not provide the licenced decoder to play the sound, it will throw codec errors.

• Try a universal player such as VLC, Nova player or KM Player
• If using KM or Nova Player, install the matching codec pack (ARMv7 or ARM64) for the eac3 (Enhanced Audio Coding 3) or DD+ (Dolby Digital Plus) codec
• Update the player app from the Play Store

Samsung/TLC/Sony, Apple TV or Other Smart TV

An audio codec not supported in smart tv error is often a firmware limitation rather than a player issue, since most Smart TVs use a fixed, non-updatable app for local file playback. You can try updating the TV’s firmware from the settings menu. Else, convert the file to AAC or MP3 audio, which nearly every Smart TV supports. If that’s not feasible, then try playing the video file through a connected streaming device instead of the TV’s built-in player.

Roku, Fire TV & Chromecast

These platforms rely on the app being cast from, not the device itself, to handle decoding.

• Cast from VLC or another app with broad codec support rather than the default file browser
• Convert the file to a widely supported format such as MP4, MOV, MPEG4 or others  before casting if the error persists

Browser/Web Playback

Chrome, Firefox, and other browsers support a narrower codec set for security and licensing reasons, so a browser-uploaded file with AC3 audio commonly triggers a “can’t play audio codec not supported” message.

• Re-export or convert the file to AAC or Opus audio before uploading
• Test playback in a different browser to rule out a browser-specific limitation

General Fixes That Work on Any Device

If the device-specific steps don’t apply, work through these from easiest to most involved:

1. Switch to a universal player such as VLC, PotPlayer, or MX Player
2. Update the current media player and the operating system
3. Install a codec pack, such as K-Lite for Windows (Mac users should convert the file instead, since Windows-style codec packs don’t apply)
4. Convert the file to a widely supported format using VLC, HandBrake, or a trusted online converter
5. Repair the file if it’s corrupted, using a tool such as Stellar Repair for Video

Which Method Should You Try?

A quick decision table for matching the symptom to the fix:

Still No Sound? It’s File Corruption, Not a Codec Issue

If a file plays with sound in other players or on other devices, the issue is compatibility, and a player switch or codec pack usually resolves it. However, if the file has no sound anywhere, freezes during playback, or shows glitches, the audio stream itself is likely damaged rather than simply unsupported.

The “Audio codec not supported” issue is often confused with a video file that refuses to open entirely. Usually pointing to an unsupported video codec or a damaged file rather than a missing audio decoder.

In that case, a codec pack won’t help. A dedicated repair tool such as Stellar Online Video Repair tool can rebuild the corrupted audio and video streams and export a playable file, once corruption has been confirmed.

Here’s the process to repair a corrupted video file:

• Open your web browser to access Stellar Online Video Repair Portal. 
• Register with a formal user account.
• Click on Upload to transfer the corrupted video file. The system supports single files up to 5 GB.

• In the next step upload a sample video file, it must be a completely healthy, working file recorded on the exact same camera or device.

• Hit repair and wait for the file to get repaired.
• Once completed, preview and download the repaired video file. The online tool offers free repair for one video file up to 100MB in size.

For files larger than 5GB in size, you can try using the desktop version – Stellar Repair for Video.

Key Takeaways

• Audio codec not supported means the player is missing the decoder, not that the file itself is necessarily damaged
• Confirm the codec with MediaInfo or VLC before selecting a fix
• VLC resolves most cases across Windows, Mac, and Android without extra installs
• AC3 and DTS are the codecs most likely to fail on iOS, Android apps, and browsers
• If the file has no sound on every device, repair the file instead of chasing codec fixes

FAQs