sony vegas large file to smaller same quallity

[edy_smf]

Hello i have a 21 GB mkv video file and i want render it in vegas or convert in another program that can do this into a maller size mkv but i want to keep same quallity and same aspect ratio and resolution, is that posible?
The file looks like this :

Format : Matroska
File size : 21.8 GiB
Duration : 1h 52mn
Overall bit rate : 27.7 Mbps
Encoded date : UTC 2011-04-05 15:54:57
Writing application : mkvmerge v4.0.0 ('The Stars were mine') built on Jun 6 2010 16:18:42
Writing library : libebml v1.0.0 + libmatroska v1.0.0
Video
ID : 1
Format : MPEG Video
Format version : Version 2
Format profile : Main@High
Format settings, BVOP : No
Format settings, Matrix : Default
Codec ID : V_MPEG2
Codec ID/Info : MPEG 1 or 2 Video
Duration : 1h 52mn
Bit rate mode : Variable
Bit rate : 25.7 Mbps
Nominal bit rate : 35.0 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 fps
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.517
Stream size : 20.2 GiB (93%)
Language : English
Audio
ID : 2
Format : DTS
Format/Info : Digital Theater Systems
Codec ID : A_DTS
Duration : 1h 52mn
Bit rate mode : Constant
Bit rate : 1 510 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Compression mode : Lossy
Delay relative to video : -83ms
Stream size : 1.19 GiB (5%)
Language : English


What should i set in rendering option in vegas or what else program should i use to convert it in a file like 4-7 GB size without transform it into a garbage quallity?

[hech54]

keep same quallity

Impossible.

[Baldrick]

Use ripbot264 or handbrake. Load mkv, use a mkv h264 hiqh quality profile. Under video set the output to 7gb. Convert. It wont be same quality but still very good.