# Temporal layers are ignored

**URL:** <https://mediasoup.discourse.group/t/temporal-layers-are-ignored/2993>\
**Category:** mediasoup libraries\
**Created:** [July 1, 2021, 6:08pm UTC](https://mediasoup.discourse.group/t/temporal-layers-are-ignored/2993 "2021-07-01T18:08:33Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![skavish](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/skavish/32/1018_2.png) [@skavish](https://mediasoup.discourse.group/u/skavish)\
**Post date:** [July 1, 2021, 6:08pm UTC](https://mediasoup.discourse.group/t/temporal-layers-are-ignored/2993/1 "2021-07-01T18:08:33Z")

</div>

hey everyone,

I am using simulcast and I can control how many spatial layers I produce by specifying different encodings, exactly how it is documented and done in mediasoup demo, i.e.:

```auto
const WEBCAM_SIMULCAST_ENCODINGS = [
  { scaleResolutionDownBy: 4, maxBitrate: 500000 },
  { scaleResolutionDownBy: 2, maxBitrate: 1000000 },
  { scaleResolutionDownBy: 1, maxBitrate: 5000000 }
];

```

With this setup on consumer side I get scalability mode S3T3.

If I remove one encoding I get S2T3.

But I can’t control how many temporal layers are there, it is always 3.

I tried this setup:

```auto
const WEBCAM_SIMULCAST_ENCODINGS = [
  { scaleResolutionDownBy: 4, maxBitrate: 500000, scalabilityMode: 'S1T1' },
  { scaleResolutionDownBy: 2, maxBitrate: 1000000, scalabilityMode: 'S1T1' },
  { scaleResolutionDownBy: 1, maxBitrate: 5000000, scalabilityMode: 'S1T1' }
];

```

But it comes to consumer as S3T3 anyway.

Is there anyway to controls number of temporal layers?

I guess there is no actual real stream for temporal layers if we just drop frames, but still.  
Or is it?

Thanks!

---

<div class="post-metadata">

**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 1, 2021, 6:37pm UTC](https://mediasoup.discourse.group/t/temporal-layers-are-ignored/2993/2 "2021-07-01T18:37:45Z")

</div>

You don’t have actual control over number of temporal layers it in the browser, so it is what browser wants it to be (mediasoup-client assumes it is 3, but it can’t know for sure).

---

<div class="post-metadata">

**Author:** ![skavish](https://yyz2.discourse-cdn.com/free1/user_avatar/mediasoup.discourse.group/skavish/32/1018_2.png) [@skavish](https://mediasoup.discourse.group/u/skavish)\
**Post date:** [July 1, 2021, 8:38pm UTC](https://mediasoup.discourse.group/t/temporal-layers-are-ignored/2993/3 "2021-07-01T20:38:30Z")

</div>

Oh, I see. thanks!