So I checked the available logs after streaming a playlist for a while, which I've never done before (probably a huge mistake on my part). I have a generic "log_xxxxxxx.log" file that doesn't seem to have any relevant info, but the only ffmpeg logs I have are related to video files from yesterday. Interestingly, the transcoding speeds seem to slow down over time; flac/wav files seem fine at first, but struggle to play after 30 minutes or so in a playlist of constant playback.