# mediasoup 3.4.9 released

**URL:** <https://mediasoup.discourse.group/t/mediasoup-3-4-9-released/575>\
**Category:** Announcements\
**Created:** [February 13, 2020, 4:37pm UTC](https://mediasoup.discourse.group/t/mediasoup-3-4-9-released/575 "2020-02-13T16:37:22Z")\
**Posts on this page:** 2\
**Page:** 1

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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:** [February 13, 2020, 4:37pm UTC](https://mediasoup.discourse.group/t/mediasoup-3-4-9-released/575/1 "2020-02-13T16:37:23Z")

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- Internals: add `Utils::Json::IsPositiveInteger()` to not rely on `is_number_unsigned()` of json lib, which is unreliable due to its design.
- Avoid ES6 `export default` and always use named `export` (it does not affect public API).
- `router.pipeToRouter()`: Ensure a single `PipeTransport` pair is created between `router1` and `router2`.
  - Since the operation is async, it may happen that two simultaneous calls to `router1.pipeToRouter({ producerId: xxx, router: router2 })` would end up generating two pairs of `PipeTranports`. To prevent that, let’s use an async queue.

- Add `keyFrameWaitTime` option to `ProducerOptions`. See:
  - [https://mediasoup.org/documentation/v3/scalability/#one-to-many-broadcasting](https://mediasoup.org/documentation/v3/scalability/#one-to-many-broadcasting)
  - [How to forward stream from one mediasoup v3 server to another?](https://mediasoup.discourse.group/t/how-to-forward-stream-from-one-mediasoup-v3-server-to-another/562/5)

- Update Node and C++ deps.

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<div class="post-metadata">

**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:** [February 15, 2020, 4:37pm UTC](https://mediasoup.discourse.group/t/mediasoup-3-4-9-released/575/2 "2020-02-15T16:37:25Z")

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Closed on February 15, 2020, 4:37pm UTC

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