Trouble with multi-language videos

I recently uninstalled Haali Media Splitter as I already had the FFDshow codecs and noticed I was no longer having trouble switching the audio/subtitles of my dual-audio videos. Now I have a multi-language video that has no sound and the subs stack on top of each other. Please advise on how to fix.

Haali Media Splitter and ffdshow don't do the same things. Haali is a splitter and not a decoder. ffdshow is a decoder and not a splitter. You need both a splitter and a decoder.

Instead of Haali and ffdshow I recommend using LAV Filters. That contains both a splitter and a decoder, plus it is actively being maintained.

If I install those, would they conflict with ffdshow? Would I need to uninstall ffdshow?

Both can be installed at the same time.

If you use ffdshow purely as a decoder, then you could remove it. It is only useful if you actually use any of its processing options.

Installing the LAV filters fixed the problem. Thanks a lot!