I have been searching for an answer to this question forever! I have been taken to pages that give me converters that fail completely or to links to codecs. The codecs I have installed but they don’t work for me. I don’t know if I have to do something after installing them but when it comes to codecs im completely clueless. So if anyone has successfully installed a codec that has worked or has used an Mp4 to AVI converter that works and can explain to me how they did it that would be great! Thank you! ^^
1. You may miss the code, download and install k-lite code pack may fix the problem.
2, You may convert your mp4 video to wmv video, windows movie maker supports wmv video pretty well. If you don’t know how to convert video, I think this step by step direction would help you a lot
http://www.freedvdripper.net/guides/convert-video-to-ipod-psp-zune-cell-phone.html
Hope it helps. Contact me if you have any other question or you can use http://www.answer.com for more answers .



1. You may miss the code, download and install k-lite code pack may fix the problem.
2, You may convert your mp4 video to wmv video, windows movie maker supports wmv video pretty well. If you don’t know how to convert video, I think this step by step direction would help you a lot
http://www.freedvdripper.net/guides/convert-video-to-ipod-psp-zune-cell-phone.html
Hope it helps. Contact me if you have any other question or you can use http://www.answer.com for more answers .
References :
Generally Windows Movie Maker support .asf, .avi, .m1v, .mp2, .mp2v, .mpe, .mpeg, .mpg, .mpv2, .wm, .wmv. If you use Vista it also support .dvr-ms.
So you can convert your video to any of them above, you can use Cucusoft Ultimate Video Converter which can support output almost any audio/video format including Video format(H264, MP4, WMV, AVI, MOV, RM, 3GP, flv, SWF, mpeg-1, mpeg-2, VideoCD, SuperVideoCD, DVD, etc) and Audio format(AC3, AAC, MP2, MP3, MP4, RA, WMA, etc.).
Hope can help you!
References :
Download here: http://www.aidownloading.com/video-converter.html
Specific guide: http://www.aidownloading.com/guide-video-converter.html
I think you need video converter software.
I recommend AVCWare Video Converter.
http://topmediasoft.net/video-converter-avcware.html
It can
1.can convert between all video formats including AVI, MPEG, WMV, DivX, MP4, H.264/AVC, MKV, RM, MOV, XviD, 3GP, FLV, etc.
2.transform between MP3, WMA, WAV, RA, M4A, AAC, AC3, OGG audios at super fast speed and high quality.
3.It support PC and all PMPs (portable media player) like iPod nano, iPod classic, iPod touch, iPhone, Apple TV, PSP, PS3, Xbox 360, Wii, Smart Phone like BlackBerry,
MP3/MP4 players like Archos, Creative Zen, iRiver, Pocket PC, PDA, etc.
Hope it useful for you.
References :