Browsing artwork showed PMS PhotoTranscoder log lines flagged
"upscaled: 1" on every request. The flag merely echoes the upscale=1
query param Plezy sent on every cover request (PMS prints it before
locating the source, including on cache hits and pure downscales), but
the param had a real cost: whenever the requested box exceeded the
source — hero art at the 4K display budget (3840x2160 requests against
the near-universal 1920x1080 agent art), portrait backdrops on >1080p
phones — PMS genuinely enlarged the image server-side. Verified against
PMS 1.43: ~2.5x the transcode time and transfer bytes for zero rendered
detail, since the client covers the slot on the GPU regardless and the
fit-policy decode bounds never enlarge.
Send upscale=0 on cover requests too: downscale output is byte-identical
and oversized requests now return the native image. Jellyfin needs no
change — MaxWidth/MaxHeight never enlarge.
close#1975
edde746
7131be4cc0