[all variants] Mplayer sometimes ignores anamorphic factor while dumping

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http://ubuntuforums.org – Hello, while ripping some of my DVDs for usage on NAS, I get into some trouble regarding the aspect ratio of the output, which I don't understand. There are two DVDs. When simply playing with Code: mplayer dvd://SOMETITLE both have the correct aspect ratio of 1.78:1 and a video stream resolution of 720x576 (and thereby are anamorphic videos?!). The process of dumping the stream to disc with Code: mplayer dvd://SOMETITLE -dumpstream -dumpfile out.vob goes perfectly fine with one of them, producing a dump with the same aspect ratio and resolution as the input. But for the (Hardware)