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Hi Rachel,<br>
<br>
We've had some similar issues over the years using video:
unpredictable but frequent buffer errors or crashes.<br>
Although we never exactly identified the cause (quite possibly:
related to HD access times), we managed to practically eliminate the
occurrence by always preloading video clips before they need to be
displayed (ie first event of a trial Procedure), and wherever
possible, building in a bit of extra time between one video clip and
the next. <br>
<br>
We also found this problem was hardware dependent, some PCs being
really bad and others, not so bad. And finally, it might possibly be
reduced by loading videos from a second internal HD that was not
being used for caching etc. (although this may just have been
superstitious conclusions on our part).<br>
<br>
Once we had something that looked like it might be working, we set
up a stress test: auto-running experiment that displayed our videos
up to ~1000 times each, with the same timing we planned to use in
our experiment (logging data). This way we could let it go on its
own, and in the event of buffer/crash problems, inspect the data
.txt file to see how many trials it went before running into
problems. Successful autoruns on this scale gave us a lot more
confidence that we could trust our experiments to real participants.<br>
<br>
Preloading videos: can be done like the ImageDisplay example at the
bottom of this page:<br>
<a class="moz-txt-link-freetext" href="http://imaging.mrc-cbu.cam.ac.uk/imaging/EprimeTiming">http://imaging.mrc-cbu.cam.ac.uk/imaging/EprimeTiming</a><br>
<br>
Finally, we did get some good advice from PST Support about video
codecs (after a long dead-end trying various codec-based solutions,
we eventually cleared them all out and went back to a fresh install
of E-Prime).<br>
<br>
Good luck,<br>
David V<br>
<br>
On 29/08/2014 15:04, Rachel Aaron wrote:<br>
<blockquote
cite="mid:5dd3bb75-de69-44a5-b6bb-befd558726e5@googlegroups.com"
type="cite">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<div dir="ltr">Hi there,<br>
<br>
I'm working on a program that displays clips from 14 different
videos, followed by a series of questions. The videos range
from 8s - 4 minutes 7 seconds, in sizes 298 KB - 43786 KB. The
videos are all located within one List Object. When I run the
experiment, I always get Error 11093: "Unable to buffer movie."
The odd thing is that every time I run the experiment, the error
occurs at a different time (after 5 movies, after 8 movies,
etc.), even when they order is the same. I've ensured that all
clips play by switching the order of the video in the List
Object. I can't figure out a consistent reason why this error
is occurring, the length, number, and size of videos that play
is different every time. <br>
<br>
I've gone back and forth with eprime support many times trying
to figure this error out, but haven't solved anything yet? Any
thoughts from the eprime community?<br>
<br>
Many thanks,<br>
Rachel<br>
</div>
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<pre class="moz-signature" cols="72">--
David Vinson, Ph.D.
ESRC Research Fellow
Experimental Psychology
University College London
26 Bedford Way, London WC1H 0AP
Tel +44 (0)20 7679 5311 (UCL internal ext. 25311)</pre>
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