Video converting application...

I'm looking for an all-in-one video converter that DOES NOT install its own codecs. The last time I installed a video converter, it installed some of it's own codecs which ended up overwriting the codecs I had already installed. The software didn't work how I wanted it to, so I uninstalled it. When I did this, it took the codecs it had installed over the top of my existing codecs, leaving some big holes (my AC3 audio codec was gone, for example). I didn't know that it had done so until I noticed audio problems on some videos. I ended up uninstalling ALL my codecs, and re-installing them. I like Quick Media Converter but it installs it's own codecs; when I uninstalled it, it also removed some of the codecs it had overwritten. The same thing happened with one of the Cucusoft converters. So, after all this babbling:
can someone recommend a video converter that does NOT install it's own codecs and just uses the ones already on the PC? Or maybe it has the option to install it's own codecs or to use pre-existing ones? Or maybe it checks to see if any codecs are installed, and then it only installs the ones that aren't already on the PC.... or maybe I'm asking too much.....

:confused
[dlb]

 

After some research, it seems that all video converters install their own codecs to a certain degree. Now, this is OK if the user keeps the software installed. But if the user decides to uninstall it at some point, the codecs installed by the software will be removed also. Since the user probably already had the required codecs on the PC before installing the converter software, it wrote over the existing codecs. When uninstalled, it figured those codecs 'belonged' to it and therefore removed them. It's just being thorough and removing everything it installed, regardless of whether the item was already there or not. So, I see no way around this. Unfortunate, but I guess that's how it is. The software is generally created for as wide a user base as possible, and the majority of people using a particular program probably have no concept of codecs and such things, so the application developers just try to make things easy for the majority of users. But- it would be great if they had the app scan for installed codecs upon installation. Then a log would be created that listed which codecs were already installed on the PC, and which codecs were installed by the application. Then when uninstalling, the app would only remove the codecs that were not already on the PC, or it could open a dialog box asking the user "do you want to remove any/all of the following codecs?" followed by a list. I don't know. I'm rambling. Sorry....