adywan said:
there has to be something conflicting with the header on your system. could be a codec issue as mentioned. you can use MediaInfo to check all the details of video file. here's a screenshot of the info for the trailer:

as you can see the header is correct.

Are we sure about this? I can't believe that mplayer/ffmpeg is just imagining this up out of thin air! Where should this info come from if not somewhere from within the file? Maybe someone with more experience than me can find out more?

... and i dont want to go on the dev-mailing list of mplayer with something trivial like this (oss devs can get kind of annoyed ;)

PS: ... and btw: I hate this 'visual' post writing editor. Is there a way to activate/see the usual 'code' based editing as known from other forums? ("[quote]" etc. instead of these visual blocks, which i seem to be incapable of managing ;) Or maybe i'm the only one having a hard time inserting a quote at the right point or deleting a image/quote from a block.