When you try to play a file that uses a codec that is not installed on your computer, the Windows Media Player tries to download the codec from a Microsoft server. When you play the video file, your computer must have a decompressor installed that can read that particular compression format. When video files are created, they can be compressed to make the file size smaller by using a program (or compressor) that is installed on the developer's computer. This article is intended for a beginning to intermediate computer user. There may also be some connection between the IMM codec family and the, so you might try installing that as well.Unable to download an appropriate decompressor Error=80040200 I have no personal experience with that website. I have found a download on the website that seems to have an installation file for the IMM4 codec, found and again. Counts IMM4 among its and may install the codec, as also explained in the above article. The codec was found to reside in VCMIMM4.dll, which would still probably need to be registered with regsvr32. The article describes how the author converted IMM4 video to other formats, so my advice is to read it carefully. The references that I have found relate to the IMM4 codec, but may still be worth trying.
This obscure format seems to be produced by a number of DVRs that use the Infinity encoding chip. How about (and this is really the last option) using a desktop recorder tool (Fraps, VLC - yes, it can do that too.) and recording the video as it plays in that 'BackupPlayer'? Since it's CCTV footage, it's probably low-resolution and framerate anyway, so you shouldn't have any noticable quality loss when doing that. Did some googling, and IMM5 seems like a pretty obscure format, possibly without open-source implementation, too. If all else fails, you can try Virtualdub: It offers the option to export to a series of BMP files, which you can then stitch together using a more common codec. IMM5 and IMM6 Codecs, I have pre-configured a SMplayer portable pack. To assist in playback of.avi files containing video encoded with the FJHT, IMM4. It plays in WMP on several computers, however. I have some security camera footage I need to analyze for a client. Handbrake is unable to handle the file, presumably because I do not have the IMM5 codec installed. I would very much like to transcode this into a more common format, as it contains a deeply important moment, and I want the option of viewing this video for decades to come. IMM5 does not show up in the standard codec packs, and Google searches are surprisingly fruitless. Note that no media player I have installed, including VLC, is able to play it. I also received a copy of 'BackupPlayer', which can play this video. As part of a legal matter, I received a copy of a security video encoded using what appears to be an 'IMM5' codec, apparently often used by police.
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