[ncl-talk] PNG trim error before doing animated Gif, all the space outside the trimmed area now is black colored.

[Sebastian Otarola-Bustos]

I'm not sure what was the error, but I followed your suggestion and now
works fine.



All the best,
Sebastián.





On Wed, Sep 23, 2015 at 6:53 PM, David Jones <jonesd647 at yahoo.ca> wrote:

> Not an NCL problem, but you could try "convert -trim +repage".
>
> Good luck,
> Dave.
>
>
>
> On Wednesday, September 23, 2015 11:25 PM, "ncl-talk-request at ucar.edu" <
> ncl-talk-request at ucar.edu> wrote:
>
>
> ----------------------------------------------------------------------
>
> Date: Wed, 23 Sep 2015 15:24:47 -0300
> From: Sebastian Otarola-Bustos <Sebastian.F.Otarola-Bustos.1 at nd.edu>
> Subject: [ncl-talk] PNG trim error before doing animated Gif, all the
>     space outside the trimmed area now is black colored.
> To: "ncl-talk at ucar.edu" <ncl-talk at ucar.edu>
> Message-ID:
>     <CAO9pyik1_R50FwZwhs=VcywLhovGSLEnx5LGkm0LkMtX4E1X7w at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hi everybody,
>
> I've been making animations without troubles converting .png to .gif using
> the following commands: convert -trim & convert -delay, so I'm cutting the
> white space with trim and then doing the animation with -delay. The strange
> thing is that if I see each .png file separately, it's cutted ok, as it
> showns in Figure1, but after doing the animation with the cutted files, you
> can see the trimmed area, but the difference between the cutted area and
> the original size is all filled with black as you can see in Figure2. Here
> you can see the main steps of my scripts:
>
>
>   *do n=0,ntimes-1,4*
>
> *      wks_type            = "png"*
> *      wks_type at wkWidth    = 1700*
> *      wks_type at wkHeight  = 1700*
> *      wks = gsn_open_wks("png","animate"+sprinti("%03i",n))    ;
> animate_000.png, animate_001.png, etc*
> *      print("Trabajando en el tiempo: " + times(n))*
> *      mpres at gsnRightString  = " Velocity(m/s):  "+ times(n)*
> *      mpres at gsnLeftString = " "*
>
> *      mpid  = gsn_csm_map(wks,mpres)*
> *      V  = gsn_csm_contour(wks,speed(n,:,:),spres)*
> *      wind = gsn_csm_vector(wks,u(n,:,:),v(n,:,:),Vres)*
> *      Heig    =gsn_csm_contour(wks,ter(:,:),ter_res)*
>
> *      overlay(mpid,V)*
> *      overlay(mpid,Heig)*
> *      overlay(mpid,wind)*
> *      maximize_output(wks,True)*
> *      delete(wks)*
> *      cmd="convert -trim animate"+sprinti("%03i",n)+".png
> "+"animate"+sprinti("%03i",n)+".png"*
> *      system(cmd)*
>
>
> *  end doINS = "convert -delay 50 animate*.png velocity_3.gif" system(INS)*
>
> I still cannot see the error, and any help would be really appreciated as
> always,
>
> All the best,
> Thank you very much,
> Sebasti?n.
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