URGENT
Using an installation program (Inno Setup) under XP, I have distributed a SETUP.EXE file that installed some Powerpoint presentations on users' computers. The SETUP.EXE file places in the user's installation folder all those files that appear in the folder created on my computer by Powerpoint 2003 after I used the command
File | Package for CD | Copy to folder ...
Various users have found no problem installing the program and starting up, on their computers, from a desk-top icon, the program with the first presentation (a one-slide menu containing clickable links to the other presentations). The presentations contain several linked mini-videos in AVI format, which are displayed in rectangular regions of certain slides. All users I know except one are seeing the videos running (although in one or two cases they are jumpy, on an old laptops).
However, one particular user with a new laptop running XP has just reported that her presentations are running with black or grey boxes instead of videos. When I went to check, and re-installed the program with all default settings, I saw that the sound of the AVIs is playing well, but instead of the video display there was a greyed-out box bearing the error message that follows:
Video Not Available : Cannot find vids:mpg4 decompressor
Powerpoint Viewer 2003 "Video not available - cannot find vids:mpg4 decompressor"
The installer-maker program (Inno Setup) runs my script that commands the copying of the following .dll and .exe files to the the user's installation folder (besides the .ppt files and the other other files that are related, such as the .avi files):
gdiplus.dll
intldate.dll
ppvwintl.dll
saext.dll
unicows.dll
pptview.exe
The Inno Setup script is run to create the SETUP.EXE file.
The SETUP.EXE file created by Inno Setup is the file that I distribute to users on CD.
Everything - viewer, dlls, ppts, avis, and large image files and the autorun startup files - goes into a folder called FILES off the folder chosen by the user for installation, and the program is started from inside this folder by the following desk-top shortcut:
"C:\Program Files\XYZProgram\FILES\ppt
view.exe" /L playlist.txt
Playlist.txt contained the following:
StartMenu.ppt
Question: Why does the "vids:mpg4 decompressor" seem to be absent on just one (or more?) computers? More importantly, what can I do (e.g. make the setup file copy some codec file or other file to ensure that this error does not happen and the videos all play visibly? I want to interfere with the users' systems as little as possible, of course, and don't want to risk overwriting some existing file in their \windows\ subfolders. (URGENT)