shrink movies

Message

st. anger · Post by **st. anger** » Thu Dec 19, 2002 1:40 am

i am trying to compress the size of my movies(from my mini dv camcorder).
ive used mencoder to encode to divx, but was wondering f there was a way to scale the actual X-Y geometry down.
ive checked the man page for mplayer but the closest thng i found s this:

Code: Select all

 -x <x> (MPLAYER only)
              Scale  image  to  x  width (if sw/hw scaling avail-
              able).  Disables aspect calculations.

       -xvidopts <option1:option2:...>
              Specify additional parameters  when  decoding  with
              XviD.

                 dr2                 Activate   direct  rendering
                                     method 2.
                 nodr2               Deactivate direct  rendering
                                     method 2.

       -xy <x>
                 x<=8                Scale image by factor <x>.
                 x>8                 Set  width to <x> and calcu-
                                     late height to keep  correct
                                     aspect ratio.

       -y <y> (MPLAYER only)

those options are for MPLAYER only though.
any ideas?

kipper · Post by **kipper** » Thu Dec 19, 2002 1:18 pm

Transcode : http://www.theorie.physik.uni-goettinge ... transcode/ allows you to resize the X-Y geometry.
Or if you prefer gui, you could always try avidemux : http://fixounet.free.fr/avidemux/
There are ebuilds for both programs.

sputnik1969 · Post by **sputnik1969** » Fri Dec 20, 2002 8:16 pm

Try it with

man mencoder not man mplayer

the correct parameter is

Code: Select all

  -vop scale[=w:h[:c[:p]]]

st. anger · Post by **st. anger** » Sat Dec 21, 2002 5:40 am

tried that:

Code: Select all

 $ man mencoder
No manual entry for mencoder

i thought there should have been a man page for mencoder but i dont know why its not on my system. wierd.

could you elaborate on that a bit more?
ex: w is width, h is height (im guessing); what is c and p??

thanks

sputnik1969 · Post by **sputnik1969** » Sat Dec 21, 2002 9:22 pm

The scaling process is handled by the 'scale' video filter: -vop scale=widht:height. Its quality can be set with the -sws option. If it's not specified, MEncoder will use 0: fast bilinear.Optionaly chroma skipping (c from 0-3)
and scaling parameters can be specified.

-sws <software scaler type> (see -vop scale option too)
This option sets the quality (and speed, respectively) of the software scaler, with the -zoom option. For example
with x11 or other outputs which lack hardware acceleration. Possible settings are:

NOTE:
For -sws 2 and 7, the sharpness can be set with the scaling parameter (p) of -vop scale (0 (soft) - 100 (sharp)),
for -sws 9, it specifies the filter length (1 - 10).

0 fast bilinear (default)
1 bilinear
2 bicubic (good quality)
3 experimental
4 nearest neighbour (bad quality)
5 area
6 luma bicubic / chroma bilinear
7 gauss
8 sincR
9 lanczos
10 bicubic spline

There is nothing about the "-scale:p" in the documentation, sorry...