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redbtn · 9th November 2019, 16:12

It's not MediaInfo issue cuz I can see (in hex editor) WAVEFORMATEXTENSIBLE_CHANNEL_MASK=0X6 in source opus file and I can't see it in file after mux>demux. But since opus has only one Channel Layout for 7.1, I think it's not a big problem for decoder. But, I'll open an issue later, maybe it will be possible to save this information in MKV down the road.
Ps: I downloaded your wav file, and it was made by ffmpeg. FFmpeg doesn't save WAVEFORMATEXTENSIBLE_CHANNEL_MASK at all. You can check it, make flac (or another format) from source like TrueHD in eac3to and in ffmpeg and compare.

9th November 2019, 16:12	#530 \| Link
redbtn Registered User Join Date: Jan 2019 Location: Russia Posts: 105	It's not MediaInfo issue cuz I can see (in hex editor) WAVEFORMATEXTENSIBLE_CHANNEL_MASK=0X6 in source opus file and I can't see it in file after mux>demux. But since opus has only one Channel Layout for 7.1, I think it's not a big problem for decoder. But, I'll open an issue later, maybe it will be possible to save this information in MKV down the road. Ps: I downloaded your wav file, and it was made by ffmpeg. FFmpeg doesn't save WAVEFORMATEXTENSIBLE_CHANNEL_MASK at all. You can check it, make flac (or another format) from source like TrueHD in eac3to and in ffmpeg and compare. Last edited by redbtn; 9th November 2019 at 16:23.