Basically, I am having the same problem as this guy: http://forums.cnet.com/5208-13973_102-0.html?threadID=365199 But there's not much help there, so I thought I'd post a thread here. There is no software I can find that will encode this without problems, and only Windows Media Player play it OK, and the display on the camera is fine, but any other software makes many blocks and artefacts. I have tried many methods and codecs to work with this - Sony Vegas, Avidemux, XMedia Recode, Mplayer, VLC etc. I am using Win7 home x64, 4Gb RAM, all updates, fast AMD quad core processor, also tried on Win XP etc. Is there some way of "fixing" the interlace on these files before editing them? Even the "cut and copy without transcode" mode of Avidemux can't handle it. Here's 5Mb of example file, raw from the camcorder, untouched. http://www.digitaltoast.co.uk/files/small_1080i_samsung_hmx-h100p_example_interlaced_artefacts.MP4 Play in Windows Media Player and it looks fine. Anything else, or try and edit in Sony Vegas...hopeless. No reply from Samsung to help request.