libjpeg turbo (http://libjpeg-turbo.virtualgl.org/) is a drop-in replacment for libjpeg and provide much faster encoding/decoding, most modern linux distro use it as default today and the latest ossbuild windows versions use it too, the performance gain is noticeable, please consider to use libjpeg-turbo in gstreamer-sdk too
Created attachment 96227 [details] tentative recipe tested with cerbero buildone libjpeg-turbo
the patch was already merged a while ago https://cgit.freedesktop.org/gstreamer/cerbero/commit/?id=367f7a1dbe0a3e1f36557abcfa1f7dd98640e15b
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