# Editor three.js : Render function no longer exists to create an MP4 file

**URL:** <https://discourse.threejs.org/t/editor-three-js-render-function-no-longer-exists-to-create-an-mp4-file/28635>\
**Category:** Questions\
**Tags:** editor\
**Created:** [August 4, 2021, 8:40am UTC](https://discourse.threejs.org/t/editor-three-js-render-function-no-longer-exists-to-create-an-mp4-file/28635 "2021-08-04T08:40:04Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Mugen87](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/mugen87/32/5645_2.png) [@Mugen87](https://discourse.threejs.org/u/Mugen87)\
**Post date:** [August 4, 2021, 8:44am UTC](https://discourse.threejs.org/t/editor-three-js-render-function-no-longer-exists-to-create-an-mp4-file/28635/2 "2021-08-04T08:44:13Z")

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As mentioned in [Why FFMPEG is used? - #2 by Mugen87](https://discourse.threejs.org/t/why-ffmpeg-is-used/28556/2), the browser has to support `SharedArrayBuffer`. It’s possible that a browser update removed the support for security reasons.

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_[View the full topic](https://discourse.threejs.org/t/editor-three-js-render-function-no-longer-exists-to-create-an-mp4-file/28635)._