Some of the video content always flashes (some work fine) on locally pavlovia

Online experiments
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1

If this template helps then use it. If not then just delete and start from scratch.

OS (e.g. Win10): win10
PsychoPy version (e.g. 2021.2.3):Psychopy2021.2.3

**What are you trying to achieve?:I hope to be able to play the movie in the routine normally (there are one hundred 5-second videos). The general process is that there is a short target interface before the video routine. When the subject presses the space button on this interface, he will start the next routine.Play one of the 100 videos, and if the keystroke cannot be completed, another fixed blank video will be played.

**What did you try to make it work?: According to “PsychoPyversion2021.1.3-2021.2.3
Python to JavaScript Crib Sheet” has been modified accordingly regarding movie and other matters needing attention.

**Link to the most relevant existing thread you have found:Since I’m a newbie, I have absolutely no clue about this problem. But when running the experiment, the console will display this warning:log4javascript.js:148 WARN 15:06:09.371 ImageStim.setMask psychojs-2021.2.3.js:1262 | setting the mask of ImageStim: image_4 with argument: undefined.
BrowserConsoleAppender.append @ log4javascript.js:148Understand this warningAI
log4javascript.js:148 WARN 15:06:09.371 ImageStim._setAttribute psychojs-2021.2.3.js:1049 | setting the value of attribute: mask in PsychObject: image_4 as: undefined
BrowserConsoleAppender.append @ log4javascript.js:148Understand this warningAI
log4javascript.js:148 WARN 15:06:09.371 ImageStim.setImage psychojs-2021.2.3.js:1262 | setting the image of ImageStim: image_5 with argument: undefined.
BrowserConsoleAppender.append @ log4javascript.js:148Understand this warningAI
log4javascript.js:148 WARN 15:06:09.372 ImageStim._setAttribute psychojs-2021.2.3.js:1049 | setting the value of attribute: image in PsychObject: image_5 as: undefined
BrowserConsoleAppender.append @ log4javascript.js:148Understand this warningAI
log4javascript.js:148 WARN 15:06:09.372 ImageStim.setMask psychojs-2021.2.3.js:1262 | setting the mask of ImageStim: image_5 with argument: undefined.
BrowserConsoleAppender.append @ log4javascript.js:148Understand this warningAI
log4javascript.js:148 WARN 15:06:09.372 ImageStim._setAttribute psychojs-2021.2.3.js:1049 | setting the value of attribute: mask in PsychObject: image_5 as: undefined
BrowserConsoleAppender.append @ log4javascript.js:148Understand this warningAI
log4javascript.js:148 WARN 15:06:09.372 TextStim._setAttribute psychojs-2021.2.3.js:1049 | setting the value of attribute: size in PsychObject: text_6 as: undefined
BrowserConsoleAppender.append @ log4javascript.js:148Understand this warningAI
log4javascript.js:148 WARN 15:06:09.372 TextStim._setAttribute psychojs-2021.2.3.js:1049 | setting the value of attribute: size in PsychObject: text_7 as: undefined
BrowserConsoleAppender.append @ log4javascript.js:148Understand this warningAI
log4javascript.js:148 WARN 15:06:09.373 TrialHandler._setAttribute psychojs-2021.2.3.js:1049 | setting the value of attribute: seed in PsychObject: intro as: undefined
BrowserConsoleAppender.append @ log4javascript.js:148Understand this warningAI
log4javascript.js:148 WARN 15:06:10.685 TrialHandler._setAttribute psychojs-2021.2.3.js:1049 | setting the value of attribute: seed in PsychObject: loop1 as: undefined
BrowserConsoleAppender.append @ log4javascript.js:148Understand this warningAI
/favicon.ico:1

       Failed to load resource: the server responded with a status of 404 ()Understand this errorAI

22MovieStim.js:371 BaseTexture added to the cache with an id [pixiid_27] that already had an entry

**What specifically went wrong when you tried that?: Some videos will flash by and some will be fine. And if the subject does not hit the previous target during the operation, the video may be played repeatedly.
Include pasted full error message if possible. “That didn’t work” is not enough information.

2

If some videos are working and others are failing, please try removing randomisation to see if the error is with a specific video.

3

Thank you very much. I originally used the recommended LVC to convert MP4 format, but there seemed to be some problems. When I changed the software and converted again, the problem disappeared.