Liip - Resize image only if bigger than expected

I'm using Symfony 4.2 and Liip Imagine bundle. I have a filter like this :

live_feed_message:
    jpeg_quality:          40
    png_compression_level: 9
    filters:
      relative_resize:
        widen: 1024

But in the case that image sent is smaller than 1024px it resize to 1024px.

I would like a filter that resize the image only in case the image is bigger.

I searched and I don't found any solution for this. Does anyone had this issue ?

Thanks for your help

Ok, I found the solution. I already tried it but not correctly I think. Now it's working. Instead of using relative_resize filter, use downscale filter.

Documentation :

The built-in downscale filter performs sizing transformations (specifically image down-scaling). This filter exposed a number of down scale options which may be used to configure its behavior.

Relative resize filter documentation