Movie with a massive audio delay

[TheDreadPirate]

Let's try pre-transcoding the audio. This setup should direct play on the client.

Code:

ffmpeg -fflags +genpts+igndts -i "K:\Media\Movies\Founding of an Army (2017)\The Founding of An Army_t01.mkv" -map 0 -c:v copy -c:a libopus -ac 2 -c:s copy -max_muxing_queue_size 2048 -max_interleave_delta 0 -avoid_negative_ts disabled newFile.mkv

Also, I forgot to ask if this issue happens on any other client? Or just the browser client in Windows?