# mediasoup-demo\_v3 video quality not good

**URL:** <https://mediasoup.discourse.group/t/mediasoup-demo-v3-video-quality-not-good/3095>\
**Category:** mediasoup-demo\
**Created:** [July 28, 2021, 8:18am UTC](https://mediasoup.discourse.group/t/mediasoup-demo-v3-video-quality-not-good/3095 "2021-07-28T08:18:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![airx](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/airx/32/1121_2.png) [@airx](https://mediasoup.discourse.group/u/airx)\
**Post date:** [July 28, 2021, 8:18am UTC](https://mediasoup.discourse.group/t/mediasoup-demo-v3-video-quality-not-good/3095/1 "2021-07-28T08:18:54Z")

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**background:**  
mediasoup demo v3, lan environment:  
server: 192.168.3.5  
client\_1: 192.168.3.6, chrome, send 1280x720 vp8(or vp9), svc.  
client\_2: 192.168.3.7, chrome, watch client\_1 video stream.

**question:**  
At the beginning client\_2 can recieve 1280x720 stream from client\_1, after 5-15s later, stream always downgrade to 960x540 or 640x360.  
Why svc downgrade in such a good lan bandwidth environment? ? Feel no sense^^

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**Author:** ![nazar-pc](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/nazar-pc/32/369_2.png) [@nazar-pc](https://mediasoup.discourse.group/u/nazar-pc)\
**Post date:** [July 28, 2021, 8:33am UTC](https://mediasoup.discourse.group/t/mediasoup-demo-v3-video-quality-not-good/3095/2 "2021-07-28T08:33:34Z")

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Open `chrome://webrtc-internals/` if you are using something Chromium-based and it will tell you why exactly quality was downgraded.