Can innosetup do a setup without compressing any of my files?

[John Florez]

I am having an issue with MPG2 files that run perfectly on the source machine but do not using my test innosetup on the target PC.

Thanks in advance.

[Gavin Lambert]

On Tuesday, February 24, 2026 at 10:08:09 AM UTC+13 John Florez wrote:

I am having an issue with MPG2 files that run perfectly on the source machine but do not using my test innosetup on the target PC.

You can distribute the files alongside the installer and use {src} as their source path, or you can still pack them into the installer using the "nocompression" flag.  Or just copy them manually without an installer, especially for a one-off test.

However the compression is very unlikely to be the problem.  Have you checked whether the target machine has the required video and audio codecs installed?  What player are you using on the target PC?

[John Florez]

Hi Gavin. Thanks for the quick reply.

You're right. My issue has nothing to do with compression nor innosetup.

It;s an obscure, outdated app that plays the multimedia project including embedded videos. The app plays perfectly on my Win 11 Pro authoring machine but the videos don't behave on my Win 11 Pro laptop.

I have no idea what is going on but I'll keep experimenting.

I'm sorry to have taken your time and really appreciate your reply.

Thank you!

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[Gavin Lambert]

On Tuesday, February 24, 2026 at 11:34:04 AM UTC+13 John Florez wrote:

It;s an obscure, outdated app that plays the multimedia project including embedded videos. The app plays perfectly on my Win 11 Pro authoring machine but the videos don't behave on my Win 11 Pro laptop.

I have no idea what is going on but I'll keep experimenting.

Try playing the videos directly using VLC; if that works then you know the files are fine (you can also do an md5sum to verify they're identical on both machines).  Players other than VLC will usually require a codec pack to be installed to play certain content types. 

[David Powell]

It could be due to MPEG2 codecs not being installed, as MPEG2 codecs are no longer installed as standard in Windows. Try checking that the MPEG-2 Video Extension (Microsoft Corporation) is installed on both PCs in the Microsoft Store app. Also check whether you have installed a codec pack, such as K-Lite or LAV Filters, that includes a MPEG2 decoder on the authoring machine but not on the other in Windows' Settings > Apps > Installed apps.

[John Florez]

Thanks, David. I'm out of town for work and will check it out when I return. VERY much appreciated!

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