[Users] NSNSTOHMNS(Gallery example) Plotting issues

[Haas, Roland]

Hello Atul,

I can venture a guess. The relevant error message seems to be:

--8<--
VisIt: Message - Rendering window 1...
VisIt: Error - The compute engine running on crcfe01.crc.nd.edu has exited
abnorm
ally.
VisIt: Error - Scalable Render Request Failed (VisItException)
viewer: Obtained null data reader for rendered image for engine
crcfe01.crc.nd.ed
u.
--8<--

I have seem odd image corruption when VisIt could not read the image
out of the OpenGL buffer it uses for rendering. 

I would try the following: 

* first try and see if you can open rho.xy.h5 in VisIt manually, you
  may have to make sure that the CarpetHDF5 reader is used
* then make a PseudoColor plot which should show one of the stars

if this works then at least VisIt can read the files and render them.

In that case you may have to play with the "screen capture" setting of
VisIt's save window functionality (which is what is used to create the
images).

In the python script, add this line:

s.screenCapture = 0

and if this does not help, try

s.screenCapture = 1

If you could include one of the images that may help.

Yours,
Roland

> Dear all,
> 
> I am trying to plot and make movie for the NSNSTOHMNS Gallery example using
> the support scripts provided. On using the VisIt support scripts as given
> in the example, I do get some figures named [rho_000000000.png, ... ,
> rho_000000231.png], but they are all usually black screens or look like tv
> white noise.
> 
> 
> Details of the simulation:
> I ran it on a cluster with 8 cores.
> My run data for mp_Psi4_l2_m2_r300.00.asc and rho.xy.h5 and the sample
> Results given in the gallery example are of the same order of
> magnitude(although not identical). So I doubt any problems on the data
> generation end.
> 
> I am using VisIt version 3.0.2 and FFMPEG version 4.2.1, and am loading
> python/3.7.3.
> 
> I get these when I run the command visit -cli -nowin -s rho.movie.py
> 
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> - - - - - - - - - - - - - -
> 
> ...
> ...
> VisIt: Message - Rendering window 1...
> VisIt: Error - The compute engine running on crcfe01.crc.nd.edu has exited
> abnorm
> ally.
> VisIt: Error - Scalable Render Request Failed (VisItException)
> viewer: Obtained null data reader for rendered image for engine
> crcfe01.crc.nd.ed
> u.
> Running: engine_ser3.0.2 -idle-timeout 480 -host 127.0.0.1 -port 5600
> VisIt: Message - Rendering window 1...
> VisIt: Message - Saving window 1...
> VisIt: Message - Saved rho_000000000.png
> ...
> ...
> s/nsnstohmns_in_saeng/output-0000/nsnstohmns/rho.xy.h5".
> VisIt: Message - Closed the compute engine on host crcfe01.crc.nd.edu.
> ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers
>   built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-39)
>   configuration: --prefix=/afs/crc.nd.edu/group/mathews/tools/ffmpeg/4.2.1
> --disable-x86asm
>   libavutil      56. 31.100 / 56. 31.100
>   libavcodec     58. 54.100 / 58. 54.100
>   libavformat    58. 29.100 / 58. 29.100
>   libavdevice    58.  8.100 / 58.  8.100
>   libavfilter     7. 57.100 /  7. 57.100
>   libswscale      5.  5.100 /  5.  5.100
>   libswresample   3.  5.100 /  3.  5.100
> Unrecognized option 'crf'.
> Error splitting the argument list: Option not found
> ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers
>   built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-39)
>   configuration: --prefix=/afs/crc.nd.edu/group/mathews/tools/ffmpeg/4.2.1
> --disable-x86asm
>   libavutil      56. 31.100 / 56. 31.100
>   libavcodec     58. 54.100 / 58. 54.100
>   libavformat    58. 29.100 / 58. 29.100
>   libavdevice    58.  8.100 / 58.  8.100
>   libavfilter     7. 57.100 /  7. 57.100
>   libswscale      5.  5.100 /  5.  5.100
>   libswresample   3.  5.100 /  3.  5.100
> Input #0, image2, from 'rho_%09d.png':
>   Duration: 00:00:09.28, start: 0.000000, bitrate: N/A
>     Stream #0:0: Video: png, rgb24(pc), 640x640, 25 fps, 25 tbr, 25 tbn, 25
> tbc
> Unknown encoder 'theora'
> 
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> - - - - - - - - - - - - - -
> 
> Any help would be greatly appreciated.
> 
> Thank you,
> best regards,
> Atul Kedia
> Physics Graduate student
> University of Notre Dame.



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