Obviously, there is a bandwidth issue trying to play ‘A Perfect Planet (2021) S01E01 - Volcano’. You find a lot of log entries like:
CVideoPlayerAudio::Process - stream stalled
Root cause oft he problem is not clear but I suggest to use iperf3 for troubleshooting, see [How To] Check Network Performance with iperf3.
Two further suggestion:
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Instead of using the NFS stack of the mediacenter, mounting the sources into the root file system using ‘/etc/fstab’ or ‘autofs’ is a better way in regards of performance.
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Your connected LG TV supports PCM, AC3, EAC3 and TrueHD but no DTS audio formats. The actual audio configuration of the Vero let convert all sound formats to 2 channel PCM since passthrough is disabled. Perhaps, it’s better to let the TV process and convert the original audio streams.