Description of the problem: I am trying to implement an experiment where participants watch a series of movie clips and classify them in two categories. To enable them to replay a clip I wanted to implement a loop like this.
‘video_loop’ goes over the different clips and ‘repeat_loop’ is ‘infinite’, ends when there is a response in semantic_key, or continues when pressing space.
This works fine offline, but online the videos freeze when repeating. I have re-encoded the videos to H264 and used them in other tasks before where they played fine online, so I think something might be going on with this loop.
Other people that had these issues were asked to look at the java script console in their browser, so I am attaching a screenshot here, though I have no idea how to interpret this:
I am using firefox, but just tried using chrome and the videos get stuck as well.
It happens every time I run it. If I continue to the next movie it works fine (breaking the inner loop). However, replaying the movie by staying in the inner loop, crashes on whichever movie I try it. It might work once or twice, but eventually freezes. When that happens neither continuing to the movie nor repeating again works and I have to abort the task with esc. Also the first movie mostly plays only the sound.
To test the loop without videos, I substituted them with images. Everything works fine then. So, might this be something about loading/reloading the movies?
Sorry for the troubles. Meanwhile I asked around and heard that it’s a known issue for which a fix will come out in the next release (which is almost ready), but I’m afraid I don’t know the details. @sotiri might be able to tell you more about that.
Hi @MNentwich, thanks for flagging. You can find more details about the issue and how to fix it on GitHub. I have forked your study, but see no MovieStim components in JS and so I am unable to implement the same boilerplate tweak. Please let me know if you need more help, x
However, now the ‘a’ or ‘c’ keys that are set up to continue to the next movie also replay the movie. I am not sure why that is the case?
I also tried to implement the other suggestion from github to end each movie by time. Because each movie has a different duration, I need to load this from a csv file. So, I added this code component after the movie:
