# Pavlovia doesn't play moviepy stimuli

**URL:** <https://discourse.psychopy.org/t/pavlovia-doesnt-play-moviepy-stimuli/24614>\
**Category:** Online experiments\
**Tags:** movies, pavlovia\
**Created:** [August 19, 2021, 7:38pm UTC](https://discourse.psychopy.org/t/pavlovia-doesnt-play-moviepy-stimuli/24614 "2021-08-19T19:38:01Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![StefanoVicentin](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/stefanovicentin/32/30789_2.png) [@StefanoVicentin](https://discourse.psychopy.org/u/StefanoVicentin)\
**Post date:** [August 19, 2021, 7:38pm UTC](https://discourse.psychopy.org/t/pavlovia-doesnt-play-moviepy-stimuli/24614/1 "2021-08-19T19:38:01Z")

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URL of experiment: [Pavlovia](https://pavlovia.org/Stefano_PhD/thai_coam)

Description of the problem:  
Hello everyone,  
I am having some issues to load movie stimuli to Pavlovia.  
I have created an experiment where subjects needs to see a video clip (2 minutes) right before the task. It works pretty well offline, but once I load it in Pavlovia, the movie does not start, showing only the first image for the whole duration of the video stimulus, without audio. Stimuli are .mp4, saved in the moviepy backend, last for 120 s and are 25 to 100 MB.  
Does any one else had the same problems?

Any suggestions?  
Thanks to everyone

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**Author:** ![thomas\_pronk](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/thomas_pronk/32/9531_2.png) [@thomas\_pronk](https://discourse.psychopy.org/u/thomas_pronk)\
**Post date:** [August 28, 2021, 1:24pm UTC](https://discourse.psychopy.org/t/pavlovia-doesnt-play-moviepy-stimuli/24614/2 "2021-08-28T13:24:16Z")

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This guide might help? [Media formats suitable for online studies — PsychoPy v2021.3](https://www.psychopy.org/online/mediaFormats.html#movies-mp4-h-264-mp3)

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<div class="post-metadata">

**Author:** ![StefanoVicentin](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/stefanovicentin/32/30789_2.png) [@StefanoVicentin](https://discourse.psychopy.org/u/StefanoVicentin)\
**Post date:** [August 30, 2021, 9:58am UTC](https://discourse.psychopy.org/t/pavlovia-doesnt-play-moviepy-stimuli/24614/3 "2021-08-30T09:58:15Z")

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Thanks Thomas for your suggestion, it was a useful guide. Anyway, I identified the issue as a problem of browser, as Safari automatically block the reproduction of contents with sound, unless otherwise specified. To solve this problem, just go on Safari → Preferences → Auto-Playing and allow the run.pavlovia website to reproduce contents.