[MEncoder-users] Mencoder quality settings ...

[Leopold Palomo Avellaneda]

Hi,

probably it's a typical question but I don't have understood it although i 
have read the documentation of mencoder. I have some streams of video 
produced by a home video device. This streams are coded in mpg2. It uses a 
lot of space.

I would like to convert it to using another codec (for example xvid or x264) 
preserving the _same_ quality (in terms of taking one frame from both and not 
finding any difference). It's something like I have a bunch of files and I 
compress it using bz2 or zip. I know that I always will have the original. 
Some kind of lossless compression.

I think that it's impossible because when I decode a frame and I recode it it 
cannot be equal to the original. But for example, if I have a photo, for 
example in tiff and I save it to jpeg, I can choose the % of quality, 
understanding that a 100% quality jpeg is equal to the original tiff using 
less space.

In my case I don't care about the disk space totally but yes to have a 
conversion to another more efficient codec.

So, if I don't want to look in to the bitrates, etc, there's some way to 
convert one stream in one format to another preserving the _same_ image 
quality but less space?


Regards,

Leo
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