Some Japanese guy by the name of emonkid wrote an open source plugin (both for Windows and the Mac - but only OS X) using ffmpeg libraries. Casio also released a QuickTime component for M4S2 importing:Ĭ. Canon came up with a QuickTime plugin for M4S2 on their site here:ī. Playback for PC users is without problems (any of the links in the previous post will work), but it won’t work for Mac users, since Windows Media Player for the Mac will only decode wmv/asf files, not avi files.Ī. Some digital cameras and camcorders produce AVI videos with fourcc M4S2. Summary: First part of this post deals with playback on the Mac, second part with editing in VirtualDub on PC Keywords: MP4S, M4S2, Microsoft ISO MPEG-4 M4S2 encoding doesn’t appear to ever have been offered. In Service Pack 2, the ability to encode in MP4S was removed. Windows Media Encoder 9 allowed MP4S encoding up until Windows XP Service Pack 1 (it’s in the list of codecs choices if CBR (constant bitrate) is picked for video). Windows Media Encoder 7 allows encoding (of asf/wmv files obviously) in MP4S. I have seen many digital camera samples with MP4S in asf/wmv and M4S2 in AVI, but not any other combination. In practice, I have never seen an asf/wmv file with fourcc M4S2. According to the ASF Specifications, the codecs are to be found in Microsoft’s own Windows Media container (extension asf/wmv). These releases are likely Microsoft’s attempt at ISO compliance (following the MPG4, MP42, and MP43 fiasco). Those codecs should also be available as automatic downloads using Windows Media Player if one is connected to the internet. * Windows Media Player for the Mac will only decode ASF/WMV files. Update your version of Windows Media Player to 7.1 (MP4S) or 9 (M4S2) or higher (link good for Mac users as well*) (which package you download depends on your version of windows and windows media player)Ģ. The full line of Microsoft MPEG-4 codecs is supported by FFmpeg, including XINTRA8 frames.1. Microsoft Windows Media Video v2/v8 (WMV2/WMV8).Microsoft Windows Media Video v1/v7 (WMV7).These are the different codecs covered under the umbrella of Microsoft's version of MPEG-4: The Microsoft MPEG-4 codecs are similar to the ISO MPEG-4 coding standard but with various modifications to specifics such as Huffman tables and prediction methods.

Microsoft mpeg codec