Come on, guys! I need to know how to reencode w/out blocks. I'm desperate.

[BlooderButcher]

Please, I have two video files

The first one, a Divx file has 640x272 and I'd like to crop it to 640x208 and re-scale it back to 640x272.
The secone one, an XviD file I'd like only to reduce its bitrate.

Any solution is appreciated. Like AviSynth, VirtualDub, Mencoder, etc.

[filmboss80]

Come on, yourself! Highly-compressed digital video like divx is prone to macroblocking, and the more you crop, blow-up, and reencode to a lower bitrate, the more likely you're going to get macroblock artifacts. You request is sort of like asking how to cut 2 inches off your hair and yet have longer hair in the end.

Nevertheless...

You can indeed make macroblocking less obvious to the eye. Here is one such filter for VirtualDub:

http://compression.ru/video/deblocking/index_en.html

[jman98]

filmboss80 is right. Why you want to crop and then re-scale the horizontal resolution makes no sense to me and will just make things worse. However, some encoders allow you specify quality as an output parameter and you can set up such encoders to (in theory) produce output not worse than the source. If your source has macroblocks in it (possible with it being Divx), you can't really make it better, you can only make it as good as the source. You can use some softening filters to make the macroblocks less noticeable, but don't expect miracles here.

[BlooderButcher]

I forgot to say that the original ones aren't blocked, their pictures are clean like crystal.

If I use a quantizer value of 2 the picture stay clean but the filesize is bigger so I need to know how do I reencode the video without losing the quality.

And I knew about h264 in-loop deblocking, but I don't want to encode it to that format as my DVD/DivX Player here doesn't recognize h264.

[Soopafresh]

I'd just feed it to AutoGK, which does a very good automatic job of cropping and transcoding.


Otherwise do a 2 pass encode and specify your desired output size.

crop it to 640x208 and re-scale it back to 640x272

You're going to lose resolution if you do that.

[Baldrick]

Please STOP make new topics for similar problem. https://forum.videohelp.com/topic359735.html