# Failed to execute 'appendBuffer' on 'SourceBuffer': The SourceBuffer is full, and cannot free space to append additional buffers

**URL:** <https://community.wowza.com/t/failed-to-execute-appendbuffer-on-sourcebuffer-the-sourcebuffer-is-full-and-cannot-free-space-to-append-additional-buffers/97355>\
**Category:** Wowza Streaming Engine\
**Created:** [June 20, 2024, 9:55pm UTC](https://community.wowza.com/t/failed-to-execute-appendbuffer-on-sourcebuffer-the-sourcebuffer-is-full-and-cannot-free-space-to-append-additional-buffers/97355 "2024-06-20T21:55:49Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![IT\_Licenses](https://avatars.discourse-cdn.com/v4/letter/i/dec6dc/32.png) [@IT\_Licenses](https://community.wowza.com/u/IT_Licenses)\
**Post date:** [June 20, 2024, 9:55pm UTC](https://community.wowza.com/t/failed-to-execute-appendbuffer-on-sourcebuffer-the-sourcebuffer-is-full-and-cannot-free-space-to-append-additional-buffers/97355/1 "2024-06-20T21:55:49Z")

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I receive this error trying to stream mp4 video.

Does anyone have an idea what I need to do to fix this?

Thank You,

Steve

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**Author:** ![Bernd\_Backhaus1](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/bernd_backhaus1/32/1328_2.png) [@Bernd\_Backhaus1](https://community.wowza.com/u/Bernd_Backhaus1)\
**Post date:** [June 21, 2024, 9:55am UTC](https://community.wowza.com/t/failed-to-execute-appendbuffer-on-sourcebuffer-the-sourcebuffer-is-full-and-cannot-free-space-to-append-additional-buffers/97355/2 "2024-06-21T09:55:41Z")

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Steve,

please open a [support ticket](https://support.wowza.com/techsupport-request) from your Wowza account with a detailed issue description, so we can help in your individual use case. Also include your [conf and log files](https://www.wowza.com/docs/how-to-create-a-compressed-zip-file-in-windows-os-x-and-linux) please, and if possible a playback URL as well as specifications on the video player and affected devices / browsers. Do you see this in multiple browsers?

The error means that the browser’s [HTML Source Buffer API](https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer) filled the complete buffer. This can be caused by browser bugs as well as issues with he video encoding, so we’d like to inspect your settings.

Regards,  
Bernd Backhaus  
Wowza Support  
WOWZA | The solution you start with, the partner you scale with.

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