# MovieStim is running but cannot see in the screen

**URL:** <https://discourse.psychopy.org/t/moviestim-is-running-but-cannot-see-in-the-screen/28369>\
**Category:** Builder\
**Tags:** movies, pavlovia\
**Created:** [April 2, 2022, 1:43pm UTC](https://discourse.psychopy.org/t/moviestim-is-running-but-cannot-see-in-the-screen/28369 "2022-04-02T13:43:50Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![mervedayangac](https://avatars.discourse-cdn.com/v4/letter/m/b782af/32.png) [@mervedayangac](https://discourse.psychopy.org/u/mervedayangac)\
**Post date:** [April 2, 2022, 1:43pm UTC](https://discourse.psychopy.org/t/moviestim-is-running-but-cannot-see-in-the-screen/28369/1 "2022-04-02T13:43:50Z")

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**OS** Win10  
\*\*PsychoPy version 2022.1.2

Hi everyone, I’m trying to create a project where I use six videos as stimuli. I used the movie component to show the videos. While I’m running the experiment, even though the program does not give any error messages, I cannot see the videos on the screen. The videos are displaying, the screen is somehow flickering and there is weird color changing in the screen but there is no video.  
I came across with a similar issue before but it was handled when I changed the version. But this time it did not help,either.  
As the video format, I was using .wmv then I converted the videos to .mp4 but the problem was still there.  
I will run the experiment online, as well. I have the same displaying problem in pavlovia, too.  
I hope I can make myself understood, and someone has an answer for this issue.  
Thank you!

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**Author:** ![wakecarter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/wakecarter/32/5753_2.png) [@wakecarter](https://discourse.psychopy.org/u/wakecarter)\
**Post date:** [April 2, 2022, 3:31pm UTC](https://discourse.psychopy.org/t/moviestim-is-running-but-cannot-see-in-the-screen/28369/2 "2022-04-02T15:31:36Z")

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That sounds like a size issue. Are you seeing a zoomed in version of the file because you have the size in pixels and your experiment is in height units?

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**Author:** ![mervedayangac](https://avatars.discourse-cdn.com/v4/letter/m/b782af/32.png) [@mervedayangac](https://discourse.psychopy.org/u/mervedayangac)\
**Post date:** [April 3, 2022, 12:47am UTC](https://discourse.psychopy.org/t/moviestim-is-running-but-cannot-see-in-the-screen/28369/3 "2022-04-03T00:47:25Z")

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Thank you a lot! I changed the moviestim’s Spatial units for pix instead of from exp settings and it solved the problem.

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**Author:** ![mario.reutter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/mario.reutter/32/5750_2.png) [@mario.reutter](https://discourse.psychopy.org/u/mario.reutter)\
**Post date:** [August 26, 2022, 10:17am UTC](https://discourse.psychopy.org/t/moviestim-is-running-but-cannot-see-in-the-screen/28369/4 "2022-08-26T10:17:55Z")

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One related problem seems to be that there are no default values for the size of a MovieStim when using the Builder. An empty size field in the Builder seems to be always filled with the movie’s native resolution **in pixels** irrespective of the units that are set for the experiment or the stimulus (leading to, e.g., an HD movie being scaled to 1920x1080 **percent** ). This could be easily fixed by forcing the units to px if the respective field in the Builder is empty and thus the size defaults to the native resolution.