On 04/24/2014 12:29 PM, Aaron Schulz wrote: > This is similar to what I proposed to Ori. For multi-page file > (pdf,djvu,tiff) we'd prerender base thumbnails and use them for downscaling > in thumb.php on demand. The base thumbnails would only be so large (e.g. not > 10000px width) since there isn't much use case for massive thumbnails vs > just viewing the original. This would also apply to single page TIFFs, where > one reference thumbnail of reasonable size would be used for downscaling on > demand.
It might even improve performance to do this for all (or at least overly large) images after looking a bit more into the distribution of typical thumb sizes and their quality when scaled from a reasonably-sized base thumb. With higher camera resolutions even JPG originals can be fairly large. 2560×1600 for example should cover the vast majority of current screens well, and could be referenced by the MultimediaViewer on high-res screens where it currently falls back to the (potentially huge) original. Gabriel _______________________________________________ Multimedia mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/multimedia
