Any quality preset other than Original started a transcode even when the
file was already well under it: a 6.2 Mbps 1080p h264 source under the
"1080p 10 Mbps" preset came back from PMS as a 10.4 Mbps encode, so capping
quality on mobile data spent more data than leaving it uncapped, plus server
CPU nobody asked for (#2152).
A preset is a ceiling, so a version that fits under both its bitrate and its
resolution is now served by the file itself, on the same direct-play path
Original takes, and no transcode decision is sent at all. Height counts as
well as bitrate because the preset's label promises a resolution too, and a
device that asked for 1080p may not decode the 4K source a bitrate-only
comparison would hand it. An unreported bitrate or height leaves the
transcode standing.
The comparison has to happen in the client: PMS answers directPlay=1 with
"Direct play OK" whatever bitrate cap the request carries, measured on 1.43
with a 65 Mbps 4K source under a 10 Mbps cap, so its MDE cannot be asked to
enforce one. Plex Web reaches its own directPlay/directStream flags the same
way, folding the preset's bitrate into its client-side direct-play profile
first. Jellyfin already gets this right server-side.
close#2152
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