[Paraview] Paraview

[Berk Geveci]

Hi Gerard,

I don't think that this is an IO issue. It may be an issue with the
FFMPEG library that we use to write animations. Actually, which
platform are you on? One thing to try is to save images and then use
another tool to create the movies. I use Quicktime for this purpose
all the time. There are other tools that do it too, like EnVe from
CEI: http://www.ensight.com/EnVe/enve.html. If this only happens when
saving AVIs from ParaView, it is probably the library we use.

-berk

On Thu, Jan 27, 2011 at 9:42 AM, Gerard Droege <gdroege at lpl.arizona.edu> wrote:
> Scott, thank you.
>
> I am already working in sequence mode.    The data I am working with is
> lunar data from the lunar reconnaissance orbiter  LRO.   I am taking data
> from the laser altimeter instrument on the spacecraft which is at very high
> resolution and constructing the lunar surface topography and then using data
> from another instrument, a neutron spectrometer which can give us an idea
> where the hydrogen (water) is located, overlaying that data on the surface
> and coloring by it.
>
> I made animations on a 32 bit windows machine last fall in a similar fashion
> using lower resolution data with great success and no troubles.   I am using
> a 64 bit machine now with 12 gb of ram,  which is why I was wondering could
> the rendering be getting way ahead of the writing to disc, not waiting for
> some buffer to be ready.
>
> I've read in the manual about the temporal interpolater but not sure how to
> apply this to an animation.    I have about 7 camera positions and am doing
> a slow orbit about the north pole of the moon.    The camera positions
> appear to be interpolated just fine.    It's simply that if I render a few
> thousand frames,   midway through the resulting avi, there are frames where
> data seems to be lost.
>
> thanks again,
>
> gerard
> LPL
> Univ of Ariz
>
>
>
>
> On 1/26/2011 7:08 PM, Scott, W Alan wrote:
>>
>> Maybe you could try writing individual images, and then stitch them
>> together using some free software?  As far as the individual frames goes,
>> try opening up the Animation View, change the mode to Sequence, and the
>> number of frames to 200.  Next, try Filters/ Temporal/ Temporal
>> Interpolator.
>>
>> If this doesn't save properly, please let me know what type of data you
>> are using, and I will look into it.
>>
>> Alan
>>
>> -----Original Message-----
>> From: paraview-bounces at paraview.org [mailto:paraview-bounces at paraview.org]
>> On Behalf Of Gerard Droege
>> Sent: Wednesday, January 26, 2011 4:22 PM
>> To: paraview at paraview.org
>> Subject: [Paraview] Paraview
>>
>>
>> Would anyone have any knowledge of how to control the frame rendering
>> rate when saving an animation?    I notice that if I make an animation
>> at 5  - 10 fps, the resulting avi file looks perfect.   However, if I
>> use the same animation sequence and render at 20 - 30 fps, the resulting
>> avi file has many holes and greyed out areas in the frames beginning
>> about half way through the animation.
>>
>> I'm wondering if it is possible for the frame rendering to get far
>> enough ahead of the IO writing to disk such that frame information can
>> be lost?    If the buffer that is holding the frames renders fills up,
>> wouldnt it wait for IO writing to disk to catch up first?
>>
>> thanks,
>>
>> Gerard
>> Lunar and Planetary Lab
>> Tucson AZ
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