Dear Jiri Kvarda and Tim.
We I hasten to notify you that the new version of Elecard MPEG Player is available on our site:http://elecard.com/products/products-pc/consumer/mpeg-player/
In this version there is opportunity to change the size of video window according to Aspect Ratio.
If you choose this setting in case when the Aspect Ration changes in video dynamically the Video Window will change it size too.
In fullscreen mode the Aspect will be set according to the player settings.