Seems like the TV is incapable of playing it, but the app doesn't realise this and therefore there's no transcode, leaving the film silent.
@Luke here are clean logs, just relating to The Apartment. My first thought was that 24-bit PCM audio was the problem but it actually isn't, because it's transcoding due to a bitrate limitation and thus the audio gets transcoded into AAC anyway. And 16-bit PCM doesn't work either. Native AAC, on a file that doesn't need transcoding, plays fine.
There's no error or anything, there's just no audio.
embyserver-63809671406.txt
embyserver-63809671516.txt
ffmpeg-transcode-3a4da699-3c6b-46e2-