media_player_mpy doesn't close the video adequately causing a build up of open files

[humanboring]

As described at https://forum.cogsci.nl/discussion/4004/another-errno-24-too-many-open-files-error when loading a large number of video stimuli using media_player_mpy in an OpenSesame project the plugin causes the "[Errno 24] too many open files error".

[dschreij]

Hmm, I don't think this is easy to solve. The problem is that video files are opened during the prepare phase of a sequence to ensure a quick start of the video playback whenever the run phase of the item is reached. If you have many videos in one sequence, then they are indeed all opened/loaded before the first one is played. I could fix this by moving the opening/loading procedures to the run phase, but this may delay the start of playback and possibly introduce other kinds of problems. @smathot, what do you think about this?

[dschreij]

Just for my understanding, how many videos do you estimate you are loading at once?

[humanboring]

I'm opening about 196 videos, but each one multiple times (5 different durations). If each duration counts then it would be 960

[dschreij]

Alright, that's quite a lot. I haven't tested with that many videos. Do you all have them in one sequence, or do you use a loop item in which you repeat the playback of one or more videos?

[humanboring]

I have a sequence of playing the same video multiple times (for different durations) and then this is looped to change to a new video until each has been played

[sakelariev]

Wondering if anyone has found a solution or workaround for this problem? I'm also experiencing the same problem (120 1-sec videos), but so far I can't find a way to make it run on Windows, on Mac I don't have this problem.

[dschreij]

I've been neglecting this project for quite a while and my response here. Sorry for that. I don't have an idea how to solve this for OpenSesame without altering the prepare-run paradigm. I hope I find the time soon to dive deeper into looking for solutions, but as it looks, this won't be in quite a while...

[dschreij]

Alright, some time is opening up and I hope to have a look at this soon. Will keep you posted!