Music Transcoding in PMP/Web

I have a collection of CD quality, FLAC encoded (~1000 kbps) music that I manage through Plex. I often find myself trying to listen to it on my laptop with PMP (and sometimes the WebUI) over ■■■■■■ coffee shop WiFi and end up with lots of gaps in playback as tracks buffer in. It’d be great if the transcoded playback options from the other clients were ported over to PMP/Web so I could avoid falling back to the mobile app when I find myself in a coffee shop with poor WiFi.