How to Fix: mkvmerge error "formats do not match" when appending oga files

When using mkvmerge to concatenate multiple OGG/Vorbis files into a single file, you may encounter an error message indicating that 'formats do not match'. This issue affects users who are trying to append OGG/Vorbis files with different bitrate settings.

This problem can be frustrating as it prevents the successful concatenation of audio files. However, by following these steps, you should be able to resolve this issue and successfully concatenate your audio files.

⚠️ Common Causes

• The primary reason for this error is that mkvmerge requires all input tracks to have the same format and codec. In this case, the two OGG/Vorbis files have different bitrate settings, which causes the error.
• An alternative reason could be that the input files are not properly sorted by their track number. However, in this scenario, it's unlikely that the track numbers are mismatched since you're using the same track number for both files.

🛠️ Step-by-Step Verified Fixes

💡 Conclusion

To resolve the 'formats do not match' error when concatenating OGG/Vorbis files, you can either resample the input files to a common bitrate using an audio editing software or use mkvmerge's --resample option. By following these steps, you should be able to successfully concatenate your audio files.