SamyGO

I have some movies recorded on an Hard disk attacched to tv i tried to convert them with the last Drmdecrypt and works smoothly for files I recorded in 2012 and 2013 otherway it doesn't work with files I recorded in 2010 (sure the tvaldeuc was old version that once) about files I recorded in 2011 only few are decrypted. The prg seems to work perfectly but the output is black video with no sound. The files are ok alos the .mbd are present.
Any suggestion would be very appreciated. Tx all

Indeed I noticed that audio is in opening with a video converter. I also remember that a set of codecs could work with the video showing it but I don't remember which one. So situation is this sometimes the decrypted seems not working (also if decypting process is fine) but I think it is only a problem of codec because opening the file with GSpot and using "Proposed Codec Solution and Test" you can see video and listen to audio but opening with some other converter you only can listen audio. It is really weird! For sure I have the common used installed. Any suggestion? Tx all