EAC3 7.1 (Dolby Digital Plus 7.1) Incorrectly Labelled as EAC3 5.1

ffmpeg added support for 8 channel E-AC3/dependent stream decoding a while ago:

#4608 (Support eight-channel e-ac-3 decoding) – FFmpeg

But the latest Plex preview transcoder builds still see the snip.eac3 sample from that ticket as:

    Stream #0:0: Audio: eac3, 48000 Hz, 5.1(side), s16p

I’m wondering if Plex’s modified version of ffmpeg/libavcodec diverges because of the codec download & EAE stuff.

I feel OK pinging @ridley since she created the FFmpeg ticket …