Image pre- or post-processing

matrix-org / synapse

Synapse: Matrix homeserver written in Python/Twisted.

https://matrix-org.github.io/synapse

Apache License 2.0

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Image pre- or post-processing #4724

Open grinapo opened 5 years ago

grinapo commented 5 years ago

Description: Did a brief test on the images hosted o nmy homeserver.

Using jpegoptim on jpegs generally saved 40-60% of the original size.
Converting images to better formats (my test was about WebP but it's just one) resulted 10-20% of the original size (and actually reducing the quality resulted more than 90% savings). Images are large, and it's getting bigger every minute. Optimising, mostly without quality loss would be a great saver.

deltabeard commented 3 years ago

I would also like a post-processing capability added to Synapse. Even something as simple as calling a script or application with the file path of the image uploaded to the server given as a parameter would be good.

I'm having a problem where screenshots are being uploaded in lossless PNG format which are very large in size when said images contain many colours (eg. screenshots of gameplay). By adding post-processing, it would allow me to compress these images appropriately.