Nextcloud Preview Generation in Environments with Limited Resources

mail@saschanockel.de (Sascha Nockel) — Fri, 21 Aug 2026 17:52:46 +0200

I’ve been running my own Nextcloud instance for several years now, and the performance of my Synology DS1019+ has actually always been sufficient for its operation; it’s just that the preview generation for photos, videos, and other media types has never worked particularly well. The reason for this was simply that the built-in Intel Celeron J3455, with its four cores, couldn’t handle Nextcloud’s regular on-demand preview generation fast enough, and since the Spectre and Meltdown mitigations were enabled, the problem got even worse. Aside from that, I was also bothered by the fact that no previews were generated for videos and audio files.

Self-Hosting on Sascha Nockel

Nextcloud Preview Generation in Environments with Limited Resources