video and E Prime 2.0

[Dave]

Sounds like classic "screen tearing" due to vsync being off. C.f. 
https://en.wikipedia.org/wiki/Screen_tearing.

On Sunday, July 15, 2012 7:32:59 PM UTC+2, Lisa Levinson wrote:
>
> Good to know that I am not alone in attempting to solve this problem but 
> no solution as of yet. I came across a posting from 7/11/11 related to my 
> movie clip problem which David Vinson responded to very thoroughly on 7/13 
> but while this information does shed some light on my situation it does not 
> seem to completely address my predicament.  For some reason the .avi video 
> files I loaded to E Prime for an experiment are now not running properly 
> after otherwise running without issue during two experimental runs. It 
> seems that the pixelated image (a gray scale gradient that traverses left 
> to right) separates horizontally as it runs for parts of the presentation. 
> The image does not always become disrupted at the same point during the run 
> nor does the image break in the same area. I think the issue may be due to 
> the 100ms stimulus presentation but it is strange that it did at one time 
> run correctly. 
>
> A colleague and I attempted to find the change the format code from .avi 
> to mpg but it will not run at all with any of the reformatted versions. I 
> do not think we tried Xvid Codec which I see worked for someone else. That 
> will be Monday's project. Again, not sure if my issue is one of formatting 
> or one of presentation duration. It may be that with EPrime the 100ms run 
> time and various inter-stimulus intervals (600ms-1000ms) makes loading the 
> files in that time frame problematic. Of course, the fact that it worked 
> and now doesn't is the true mystery.
>
> Anyone have thoughts????
> Lisa
>

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