Open Bug 1631263 Opened 2 years ago Updated 1 month ago

Support RTCRtpScriptTransform (formerly webrtc insertable streams)


(Core :: WebRTC: Networking, enhancement, P2)

68 Branch



Webcompat Priority P1


(Reporter: jerome.bouat, Unassigned)


(Blocks 2 open bugs)


(Whiteboard: [jitsi-meet])

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0

Steps to reproduce:

Insertable streams provide a hook between the RTP (de)packetizer and the encoder/decoder as described here :

The Jisti team implemented an end-to-end encryption by using the insertable streams of Chrome with the Jisti Meet system :

This allows their video bridge (Selective Forwarding Unit) to easily forward packets whatever they are encrypted or not, whatever the receiver quality is.

On the end points, the insertable stream can be processed into a separated thread (or process ?), besides the usual (de)packetizers and encoder/decoder.

Actual results:

It seems Firefox doesn't support it.

Expected results:

Plan a support for this feature ? Are their any security issues ?

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

Component: Untriaged → WebRTC: Audio/Video
Product: Firefox → Core

Jib, would you mind taking a initial triage pass here?

Flags: needinfo?(jib)

Please add insertable streams support to Firefox.

Access give access to:

  • end-to-end encryption
  • adding more reliability with forward error correction

For more information, please watch the “Jitsi Community Call” (Streamed live on 21 Apr 2020) at 21’30”

100% support for Firefox (and other non-Chrome browsers)

It is understood that Chromium has the insertable streams feature.

What do you think?

Thank you

I believe Mozilla is working on a position on insertable streams. We should probably open an issue on

Flags: needinfo?(jib) → needinfo?(drno)

Correct. Mozilla first needs to decide about it position on what we think about Google insertable streams proposal. These discussions don't happen in bugzilla.

Flags: needinfo?(drno)

(In reply to Jan-Ivar Bruaroey [:jib] (needinfo? me) from comment #4) and (In reply to Nils Ohlmeier [:drno] from comment #5)

It looks like this is being worked on in the standards-positions tracker. I am closing this as moved for now, it can be reopened or recreated when a position is taken.

Closed: 2 years ago
Resolution: --- → MOVED

I guess this issue can be reopened now that a position is taken.

any news about this?

(In reply to Nico Grunbaum [:ng,] from comment #7)

It looks like this is being worked on in the standards-positions tracker. I am closing this as moved for now, it can be reopened or recreated when a position is taken.

Now that a position has been taken could this bug be reopened? Or is there another bug tracking work on WebRTC insertable streams?

Resolution: MOVED → ---
Ever confirmed: true

Just to update this issue that the plan is to implement the latest spec, which is RTCRtpScriptTransform, and not any previous Chrome API. This is the API we'd implement that most matches the requests from major services.

Separately, the spec also offers the SFrameTransform API, which would provide sframe encoding natively without requiring this to be done by JS. This API is a bit less mature, and we haven't gotten requests for it yet. I'll open a separate issue on that.

Severity: normal → S3
Component: WebRTC: Audio/Video → WebRTC: Networking
Priority: -- → P2
Summary: support webrtc insertable streams → Support RTCRtpScriptTransform (formerly webrtc insertable streams)
Duplicate of this bug: 1715697

Jitsi Meet has just implemented RTCRtpScriptTransform support, so E2EE on Jitsi Meet will work in Firefox once Firefox gains RTCRtpScriptTransform support.

Since firefox 96 fixed many issues about webRTC support This is one important remaining bug. Is there any ETA?

Depends on: 1749547
No longer depends on: 1474543

Any update on this?

Any news? says that this is blocking Facetime support in Firefox.

Webcompat Priority: --- → ?

Given that we can get support for Facetime, setting webcompat priority as P1.

Webcompat Priority: ? → P1
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