I have loaded music from windows media player to archos 15b vision and they are in the files but wont play and when you click on them they say warning no file??????

SOURCE: Archos 605 doesn't recognize my music files

from another forum on this site

Thanks and credit to eyez12 - the 2nd option below worked for me

try going to menu, settings, system, and then clicking the update ARCLibrary button, that was all it took for me.
if that doesn't work then go to repair and formatting tools and click "clear temp system files and cache"

SOURCE: Firmware upgrade results in arclibrary boot failure

I managed to overcome the problem by doing a factory reset. Unfortunately doing this initially created more problems in that on reboot the main screen appearance looked as it should but was almost inoperable. When the usb cable was connected to my pc the disc did appear on My Computer . The system folder was only 1MB. By good fortune I had copied and saved my Archos files before I carried out the factory reset. Copying the original system files ( about 20MB) back to my Archos returned normal behaviour. Further, two additional buttons appeared. One was a manual arclibrary update button and the other a USB setup button . I cannot get file transfer to operate under windows media player mode and Windows media player 11. No problem though. I use PC hard drive mode and carry out a manual arclibrary update. None of this was possible prior to the factory reset. I believe I would still be having serious problems had I not saved and restored my system files

SOURCE: Archos 704 Wifi - does not play AVI file until its full lentgh

I had the same issue.
The size of the AVI cannot exceed 1gb or the end of the movie will never play.

I had a movie that was 1,7gb. 2 hrs and 15 seconds.
The Archos recognized this as a 1.7gb file and 2:00:15 long.
As soon as the movie started, the time line bar at the bottom of the screen went from 2:00:15 to 1:10:25. Basically, it cut off the last 50 minutes of the movie.

I simply divide the movie into 1gb chunks.

I decrypt the DVD to the computer
Use Nero Recode to convert it to and MP4. Divide the movie into 1gb chunks and Maximize the Volume.
Use SUPER to convert it to an AVI / MPEG-4 / MP3.
Copy this to the Video folder of the Archos.

This is simply something that Archos does not want to admit is an issue. They want you to purchase the Cinema plugin.

SOURCE: My Archos 605 wifi will not accept mpeg4 files

Do not use windows media player. Go to my computer and then open the archos icon or in some cases words that have the name you named it or a605.Then go into the harddrive from there go to videos and drag and drop your videos into the folder inside the video folder or just drag and drop it. If it is on system settings Pc Hard Drive or any other setting other than windows mmedia device you have to manually update your abclibrary.

SOURCE: Archos 605 Video Player

change another kind of converter,
Video Download Studio can meet your needs,i think
Download, convert and save videos directly from Youtube and more. Formats AVI, MPEG, MP4, 3GP, WMV, MP3, FLV, MOV, WAV.
get a free trial from http://www.downloadvideos-convert.com/download-videos-music
hope it can help you more or less!