[vdr] mp3 plugin - other image locations

Hi.

I'd like to use the MP3 plugin to convert and play a random slideshow of my personal photos when switching tracks, rather than the usual cover/artist/background images.

How can I do this?

For the radio plugin I cron a bash script which randomly chooses a file to convert. This is also a bit hit and miss - but still better than NO SIGNAL, Black, or the same image over and over. Since the MP3 plugin caches images, I'd need to disable this. I could then randomly choose an image file and link it into the playlist root periodically.

Any ideas?