The VideoLAN Forums

I have webm containers with VP8 coded video and Opus audio. During playback, VLC reports "opus error: initial Opus header is corrupted" and "opus error: cannot read Opus header". A few minutes with the source code reveals that VLC is looking for an ogg header instead of raw opus packets. Webm/Matroska files should not have an audio stream in some other container like ogg. If I convert the file to webm VP9/Opus, it plays back perfectly. I have examined both byte streams and they are both valid raw Opus packets so it looks like a bug specific to VP8/Opus.

Is this a bug or some other behaviour that is expected? I have example video and can debug source code if needed.

Seems as if VLC requires an Opus Ogg header as extra data in the MKV stream header. While this is strictly not necessary, I understand that it is a little easier on the code to do it this way. Case closed.