How to fix audio track issue in Clipchamp?

Extract the first audio stream into a separate file, import it into the existing Clipchamp project, and mute the video’s embedded audio before exporting.

Clipchamp accepts common containers such as MP4, MKV, MOV, and AVI, but its format documentation does not describe selecting or preserving a particular embedded audio stream during export.^1^ Microsoft-hosted guidance for files containing multiple audio streams recommends handling those streams with other software.^2^

Preserve the existing edit

1. Install FFmpeg from its official distribution source.
2. In PowerShell, inspect the source and extract its first audio stream:

# List the embedded audio streams and their indexes.
ffprobe -v error -select_streams a -show_entries stream=index,codec_name:stream_tags=language,title -of default=noprint_wrappers=1 "input.mkv"

# Extract the first audio stream (0:a:0) and convert it to M4A/AAC.
ffmpeg -i "input.mkv" -map 0:a:0 -vn -c:a aac -b:a 192k "track-1.m4a"

# Optional: create a short sample first for verification.
ffmpeg -ss 00:00:00 -t 00:00:30 -i "input.mkv" -map 0:a:0 -vn -c:a aac "track-1-sample.m4a"

0:a:0 means the first audio stream in the first input file. If the preview contains the wrong language or recording, try 0:a:1, then verify another short sample before processing the full file.

3. In Clipchamp, select My media → Import media, import track-1.m4a, and drag it onto the timeline.^3^
4. Align the imported audio with the start of the source video.
   • If the video remains in chronological order, the full audio file can usually remain aligned underneath it.
   • If sections were removed, rearranged, or speed-adjusted, split and trim the imported audio to reproduce those edits.
5. Select every affected video clip and click its speaker icon, or use Audio in the property panel to set its volume to zero. Muted embedded audio is excluded from export while other timeline audio remains audible.^4^
6. Export a short copied section first and verify it in a media player. Once correct, export the complete project.

Optional quick experiment

Clipchamp can detach a video’s audio through select clip → Audio → Detach audio.^4^ However, Microsoft does not document which embedded stream is detached when the source contains multiple audio streams. Test this on one affected segment only; do not assume the track heard in the editor is the one that will be detached or exported.

If rebuilding is acceptable

Create a new video containing only the wanted audio stream, then use that file in a copied Clipchamp project. For example:

# Keep the original video without re-encoding it.
# Keep only the first audio stream and encode it as AAC.
ffmpeg -i "input.mkv" -map 0:v:0 -map 0:a:0 -c:v copy -c:a aac "single-audio.mp4"

# Confirm that the result contains one audio stream.
ffprobe -v error -select_streams a -show_entries stream=index,codec_name -of default=noprint_wrappers=1 "single-audio.mp4"

MP4 is one of Clipchamp’s recommended input formats.^1^

If the mismatch still occurs with a source containing only one audio stream, update Clipchamp or the browser and retry from a copied project. Microsoft also recommends converting problematic source media to MP4 and testing a lower export resolution.^5^

For persistent failures, personal-account users can open Help (?) → Support chat in Clipchamp; work or school users should contact their organization’s IT help desk.^6^

References

1. Video file formats supported by Clipchamp | Microsoft Support
2. How to access additional audio channels in Clipchamp?
3. How to add voiceovers to videos | Microsoft Support
4. How to mute, separate, and delete audio from video | Microsoft Support
5. Exporting from Clipchamp (Troubleshooting) | Microsoft Support
6. How to get in touch with Clipchamp support | Microsoft Support