Server Version#: 1.24.2.4973
Player Version#: 8.23.0
Server running on Synology DS1019+ (native app)
this is more of a “why” is this happening rather than “this shouldn’t be doing” kinda post.
i have this 4k remux file that plays fine with zero issues when my shield is connected to a 4k TV (via a soundbar that supports Atmos etc) - both Direct Play.
when i connect the same shield to a non-4k TV, then i get both video and audio transcoding, but if i change the audio track to the ac3 5.1 track, then it direct plays both the video and audio.
so why does a video transcode initiate just because the audio format isn’t supported by the TV?
i would have expected just the audio track to transcode rather than both video and audio?
i’ve attached screenshots of the file details, plex dashboard, shield audio settings and plex client settings.
I follow. If you start that playback and look at the playback info on the client side (Bring up the playback controls → 3 dots → Playback Info) does it show you the transcode reason? It may just be a copy transcode (i.e. it’s just passing the video part straight through unprocessed but has to transcode the stream because of the audio).
I didn’t read your original post thoroughly enough. I was muddying the waters. Take a look at the attached photo though. The client player will provide additional details that the dashboard doesn’t, including transcode reason.
so disabling passthru will solve the issue?
will disabling passthru have any adverse affects elsewhere?
edit - just tested this with the passthru set to disabled (assuming you mean the passthru setting in the plex client) and it still gave the same result of both video and audio transcode.
when enabling optical passthru it then gives a second settings option with “AC3” and “DTS” as option. with both of them unticked it made no difference. as the audio track is TrueHD which is neither AC3 or DTS, however ticking both also makes no difference.
