[MEncoder-users] Mencoder quality settings ...

[Grozdan Nikolov]

On Thursday 03 January 2008 20:58, Leopold Palomo Avellaneda wrote:
> 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.

Hi,

for H.264 video, maybe try out my 'h264enc' script. It has a "near lossless" 
preset in it using a CRF of 18

http://sourceforge.net/projects/h264enc

>
> 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