Tutorial: How to achieve "Zoom to fill" ImageCache action as known from video players.

With ImageCache's default built-in actions I failed to achieve a "Zoom to fill" action, as known from the video player realm. Luckily I came to ImageCache Actions, which has a certain action called "Aspect switcher", a landscape/portrait aspect ratio dependent switch, which eventually let me achieve it!

First action set attempt FAILED:

"landscape"
1) Scale: height 300
2) Crop: width 400 height 100% xOffset center yOffset center

"portrait"
1) Scale: width 400
2) Crop: width 100% height 300 xOffset center yOffset center

"400x300-fill"
1) Aspect switcher: if portrait use portrait, if landscape use landscape

Second action set attempt WORKED:

"height300"
1) Scale: height 300

"width400"
1) Scale: width 400

"400x300"
1) Aspect switcher: if portrait use width400, if landscape use height300
2) Crop: width 400 height 300 xOffset center yOffset center

Conclusion / Possible bug ?

"Aspect switcher" seems to fail if one of its switcher included presets, contains more than one action.

Workaround:

Put only 1 action into a landscape/portrait preset. Then integrate these presets through an "Aspect switcher" action at the beginning of your preset, and all further actions below in that preset.