Plex web transcode stereo AAC, why?

Server Version#: 1.42.1.10060
Player Version#: 4.149.0

Hi,

can somebody helps me to understand why all my medias with AAC 2.0 files are transcoding the audio (not the video, audio only) using plex web with chrome ?

Codec AAC
Chaînes 2
Bitrate 195 kbps
Langue Français
Language Tag fr
Audio Channel Layout stereo
Profil lc
Sampling Rate 48000 Hz
Titre French AAC 2.0
Display Title Français (AAC Stereo)
Extended Display Title French AAC 2.0 (Français)

Aug 30, 2025 20:40:18.319 [133578547526456] Débogage — [Req#c80b/Transcode] MDE: Selected protocol dash; container: mp4
Aug 30, 2025 20:40:18.319 [133578547526456] Débogage — [Req#c80b/Transcode] MDE: analyzing media item 683596
Aug 30, 2025 20:40:18.319 [133578547526456] Débogage — [Req#c80b/Transcode] MDE: The Movie: Direct Play is disabled
Aug 30, 2025 20:40:18.319 [133578547526456] Débogage — [Req#c80b/Transcode] MDE: The Movie: media must be transcoded in order to use the dash protocol
Aug 30, 2025 20:40:18.319 [133578547526456] Débogage — [Req#c80b/Transcode] MDE: The Movie: no direct play video profile exists for http/mkv/hevc
Aug 30, 2025 20:40:18.319 [133578547526456] Débogage — [Req#c80b/Transcode] MDE: The Movie: no direct play video profile exists for http/mkv/hevc/aac
Aug 30, 2025 20:40:18.319 [133578547526456] Débogage — [Req#c80b/Transcode] MDE: The Movie: no direct play video profile exists for http/mkv/hevc/aac
Aug 30, 2025 20:40:18.319 [133578547526456] Débogage — [Req#c80b/Transcode] MDE: The Movie: Audio Direct Streaming is disabled, so video's audio stream will be transcoded
Aug 30, 2025 20:40:18.319 [133578547526456] Débogage — [Req#c80b/Transcode] MDE: Cannot direct stream audio stream due to profile or setting limitations
Aug 30, 2025 20:40:18.319 [133578547526456] Débogage — [Req#c80b/Transcode] MDE: The Movie: selected media 0 / 683596

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