# SVC support on the viewer side

**URL:** <https://mediasoup.discourse.group/t/svc-support-on-the-viewer-side/177>\
**Category:** mediasoup libraries\
**Created:** [July 31, 2019, 7:25pm UTC](https://mediasoup.discourse.group/t/svc-support-on-the-viewer-side/177 "2019-07-31T19:25:40Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![footniko](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/footniko/32/79_2.png) [@footniko](https://mediasoup.discourse.group/u/footniko)\
**Post date:** [July 31, 2019, 7:25pm UTC](https://mediasoup.discourse.group/t/svc-support-on-the-viewer-side/177/1 "2019-07-31T19:25:40Z")

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I’m not sure it’s related to MediaSoup at all but is it mandatory to have an SVC-supported browser on the viewer side as well to be able to use SVC?

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**Author:** ![ibc](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/ibc/32/1540_2.png) [@ibc](https://mediasoup.discourse.group/u/ibc)\
**Post date:** [August 1, 2019, 6:56am UTC](https://mediasoup.discourse.group/t/svc-support-on-the-viewer-side/177/2 "2019-08-01T06:56:24Z")

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If you mean VP9, Chrome can generate VP9 SVC (spatial and temporal layers) and Firefox can render it (even if Firefox can not generate VP9 SVC).

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**Author:** ![footniko](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/footniko/32/79_2.png) [@footniko](https://mediasoup.discourse.group/u/footniko)\
**Post date:** [September 19, 2019, 6:44pm UTC](https://mediasoup.discourse.group/t/svc-support-on-the-viewer-side/177/3 "2019-09-19T18:44:00Z")

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Firefox indeed can render SVC, however, it becomes not smooth if the spatial layer is \> 0. I had the same issue with Janus, so making conclusion that SVC on Firefox is useless. Please, let me know if you have any thoughts about that.

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**Author:** ![ibc](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/ibc/32/1540_2.png) [@ibc](https://mediasoup.discourse.group/u/ibc)\
**Post date:** [September 19, 2019, 7:45pm UTC](https://mediasoup.discourse.group/t/svc-support-on-the-viewer-side/177/4 "2019-09-19T19:45:47Z")

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No, I do not have any thoughts about it. Something to tell to Firefox developers.

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**Author:** ![ibc](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/ibc/32/1540_2.png) [@ibc](https://mediasoup.discourse.group/u/ibc)\
**Post date:** [December 2, 2019, 11:10pm UTC](https://mediasoup.discourse.group/t/svc-support-on-the-viewer-side/177/5 "2019-12-02T23:10:51Z")

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