[billythekid13]

The problem with MKV instead of ISO is that the image are in half size (two image on 1920x1080) and the final quality is lowest than blueray... no ?

No. If it's ripped correctly, the video quality will be absolutely identical. The only difference is that an MKV can only hold a single video (e.g. one movie) while an ISO can hold an entire disc (e.g. movie plus extras). So if you want to store more than just the film, you would need to rip it to several separate MKV files. On the plus side, when converting to MKV you can delete things like disc menus, and audio and subtitle tracks that you don't need - that saves a bit of space.

If you want to try converting to MKV, you could perhaps try downloading utility called MakeMKV - it's designed for ripping straight from disc to MKV files, but it works very nicely with ISOs too.

Thanks Shasarak for you answer and explanation. 

I'll tests makemkv.. 

But i still don't understands why video quality should be the same. In one case we have 960*1080 images (per eyes) in other we have the double size 1920*1080 (per eyes). This should be a major difference in screen. Same if pictures are resized by TV in HD, the source is important ...  no ?