Risize 1080P to 720P with or without re-encoding best method

[onlyeuro]

hello friends i m new here
my first thread here
i wanna ask 1 question

i got so many HD MKV Videos they are 1920X800 in resolution
the standard BR-RIP of hollywood movies...

i wanna convert them to 720P.... coz my PC performance is good on 720P........
1080P stucks on my PC....

i am looking for the way in which i can resize these videos to 720P without loosing the video quality means i dont wanna re-encode...

secondly if its necessary to encode... then recommend me some useful software by which i can re-convert these videos to 720P without touching other Video Codec settings....

every video of mine is X264 MKV
with DTS Audio... some are AC3.....

i dont wanna touch audio and video enoding settings i just wanna resize video from 1080P to 720P

plz help me....
sorry for improper english...
and plz dont recommend me Avisynth... staxrip and megui... i have tried all these...

ADMIN if i post this in wrong section then plz move this in correct section but plz dont delete this post..............

[aedipuss]

try multiavchd. it can make mkv files and you can resize to 720p. it will re-encode but so will anything else you try as it's required.

[guns1inger]

It is necessary to re-encode. No choice there. The part of MultiAVCHD that does the resizing has been released as a standalone app called UncropMKV. This might be simpler to use for your needs.

Note, however, that both of these tools aim to create compliant AVCHD video at correct resolutions, so they will add black bars to ensure your final resolution is 1280 x 720 (or 1920 x 1080). Chances are you don't actually want this. If not, try Xvid4PSP 5.37 instead. Load the mkv, select MKV as the output container, set audio to Copy, set a resize to 1280 x nnn and re-encode at a quality level of your choice.

[ulapines]

RipBot would be a good choice