LPCM audio decoder codec

i have a problem with a two set dvd movie in the hdd.it has playback but when i want to open it for store it in a single file with a converter i can’t or i get the messege “it is missing the LPCM audio decoder codec”.i removed a program before and i don’t know if some codecs are missing.tough the playback seems fine.what is it to do?

Try this

I had the same problem when I tried converting vob files from a DVD video to divx using DivX 7 Decoder.
The files played WITH sound but I got a message from DivX 7 Decoder that the LPCM Audio Decoder Codec was missing and right after appling this fix I’m now converting the files.
This fix solved the problem.