Avidemux+cannot+use+that+file+as+audio+track May 2026

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Avidemux+cannot+use+that+file+as+audio+track May 2026

The Problem: Users often try to import audio files (like FLAC, OGG, or variable bitrate MP3s) that Avidemux cannot natively handle or index correctly for editing. The current error message ("Cannot use that file as audio track") is a hard stop, forcing the user to close Avidemux, use a third-party tool (like Audacity or FFmpeg) to convert the file to a compatible format (usually WAV), and then try again.

The Solution: A "Smart Audio Transcode & Inject" mechanism that automatically detects incompatible audio inputs and offers to convert them into a safe, editable format on the fly without leaving the Avidemux interface.

In the left sidebar, set Audio Output to PCM. PCM is uncompressed WAV. It works with everything.

Sometimes, Avidemux simply cannot handle a specific file. It is not a professional audio engineer. If you have spent 20 minutes troubleshooting, consider these alternatives for muxing external audio: avidemux+cannot+use+that+file+as+audio+track

If MKVToolNix rejects your audio file, your file is truly corrupted. If MKVToolNix accepts it but Avidemux doesn’t, then Avidemux is the bottleneck.

Avidemux’s "Copy" mode hates Variable Bitrate (VBR) MP3 files. When you cut video on keyframes, VBR audio loses sync because the bitrate fluctuates. Avidemux is old-school; it prefers Constant Bitrate (CBR).

The Fix: Convert your VBR MP3 to CBR MP3 or PCM WAV using a tool like Audacity or FFmpeg before loading it into Avidemux. The Problem: Users often try to import audio

FFmpeg one-liner: ffmpeg -i input_vbr.mp3 -b:a 192k -acodec libmp3lame output_cbr.mp3

Follow this exact sequence when you see the error.

Ensure that the audio file is located in a directory with read access. Try moving the file to a different directory or changing the file permissions to allow Avidemux to read it. In the left sidebar, set Audio Output to PCM

Even if your codec matches, the container (the file wrapper, e.g., .mp4, .mkv, .avi) might reject it.

The Incompatibility Chart:

The Fix: If you are trying to use a FLAC or Opus file as an external track, you must change your output format to MKV. MP4 does not support FLAC natively.

Go to Format dropdown in the main toolbar and select MKV V2 or MKV. Then try adding your external audio track again.

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^* Bandwidth and page load time averages were measured on an iPhone X running iOS 11 connected to Wi-Fi. Figures are averages calculated from the top 10 mobile websites by traffic at the time of testing. Actual savings may differ depending on a number factors, including, but not limited to, network conditions, caches, and cookie data.

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