Size ratio for WMV / AVI to MKV

[rronald_25]

Was wondering if there's any good ratio size for me to convert files from WMV / AVI to MKV without losing noticeable quality?

For example I have 4.9gb 720p WMV file and I want to convert it into smaller size (+-2.2gb) so I can put 2 movies on 1dvd but without losing quality, would that be possible?

and is there rule of thumb for this such as WMV to MKV the perfect size would be maybe 50% smaller / even 25% smaller still great, and so on.
also is there a rule of thumb for AVI files?

Thanks

[Baldrick]

Nope. You will lose quality.

[videobruger]

As Baldrick says: Nope.

However, quality is a highly subjectively matter and lies IMO in the eyes of the beholder.

So my suggetion:

Try using Handbrake. Select say 300 sec (top of the screen) On the video tab select 2-pass/Avg bitrate. Use Vcalc to determine the bitrate. And then see for yourself.

[rronald_25]

Im using videocoder & usually I just put the target size but I will try 2 pass encoding and see how it goes
Thanks