Transcoding fails due to bad ffmpeg parameters, but only for this client

[BrunoMSantos]

Describe the bug

I noticed this playing flac files that meet the criteria for being transcoded (high bitrate meeting a threshold). On Android it all works fine (log attached), but not for the desktop player (in Linux if relevant, logs attached as well).

The thing that puzzles me is that in both cases the transcoding should be equivalent (flac->aac), though for some reason, the ffmpeg command ends up being different depending on the client and fails for this one. Maybe this is an issue with the server in fact, but given that I can only reproduce it with this client, I'm posting it here 1st.

Logs for the respective transcodes:
android.txt
desktop.txt

The relevant errors to help others search for the issue:

[flac @ 0x5e63e50dbb00] Invalid audio stream. Exactly one FLAC audio stream is required.
[out#0/flac @ 0x5e63e50db140] Could not write header (incorrect codec parameters ?): Invalid argument

To Reproduce

1. Set up client and server such that transcoding is necessary for audio files.
2. Play a sufficiently high bitrate flac file.

Desktop:

• OS: Linux
• Server v10.10.3; desktop client v1.11.1; android client used for comparison v2.6.2
• Installation Method: pacman (server package from extra and desktop client from aur)