You both make excellent points, and I must say this is quite an intelligent discussion! @Neo: I know that using a compile from the stable branch of XviD has been proven to make a 100% compliant encode (verified with msfdam, etc.), and even today you can use the MP4 container, but there is one thing that concerns me, and that is resolution. We all know that SVCD is limited to 480x480, and DVD is 352,704,720, etc. Essentially, they all have pre-determined resolutions. Do you think that most future standalones will 1) support square pixels, and 2) play most of the different resolutions that are being used right now. Thus, even though you have a proper, 100% compliant MP4 file, if the resolution used was, say, 704x304, 352x240, 448x336, or even 720x480 without the proper aspect ratio, would it really work on a standalone? Of course this is all speculation, but it's something I've thought about in the past, and I'd be interested to hear other's thoughts. To keep this OT, I use XviD, MPEG1, and MPEG2 to store captures...whatever tool suits the job. cjv