b3LAB – PortalOFX+

Four OpenFX plugins, one license: Syphon IN/OUT and NDI IN/OUT, bidirectional. Route live realtime visuals into DaVinci Resolve Studio or Assimilate Scratch / LiveFX — and send the result back out to TouchDesigner, MadMapper, OBS, VDMX, or any NDI receiver. Explicit lifecycle, broadcast-grade timecode + colorspace tagging, and live health telemetry. No screen-capture workarounds, no export loops.

Get Early Access → View Features ↓

DaVinci Resolve Studio 19+ Assimilate Scratch 9.x+ 4 plugins · 1 license macOS · Apple Silicon + Intel

// FEATURES

What PortalOFX+ does

A focused OpenFX plugin suite. Four plugins — Syphon IN/OUT and NDI IN/OUT — bundled under one license. Give your realtime visual pipeline a direct, bidirectional path into DaVinci Resolve Studio and Assimilate Scratch / LiveFX, with a Frame Delay Buffer for tight AV-sync.

SYPHON IN + OUT

Native macOS shared texture pipeline

Two plugins — SYPHON IN and SYPHON OUT. Receive Syphon frames from any Syphon server (TouchDesigner, Resolume, MadMapper, VDMX, custom Metal apps), and send DaVinci Resolve Studio or Assimilate Scratch clip output back out as a Syphon server. Embedded Metal-backed Syphon framework, minimal latency, no frame export.

Explicit Start Syphon OUT / Stop / Apply Name & Restart Stream buttons — no auto-start on plugin drop
Live source discovery with Refresh Sources button + per-source UUID-stable reconnect
Reconnect Input button + Fallback Mode (Freeze · Black · Testcard) when source disappears
Auto-name format b3LAB PortalOFX+ — <Host> — <ShortID> or fully manual stream names
Only Publish When Clients Attached toggle — saves GPU/CPU when no client is listening
Syphon and NDI active in parallel within the same session

NDI IN + OUT NDI® compatible

Network-based bidirectional NDI

Two plugins — NDI IN and NDI OUT. Receive NDI streams from any source on your local network and publish DaVinci Resolve Studio or Assimilate Scratch clips as NDI sources. NDI 5/6 SDK, lazy-loaded — the host runs even if the runtime is missing.

Source discovery with Refresh + Auto-Connect on Load (preferred source reconnects on plugin instantiation)
Embed Resolve Timecode in NDI frames — frame-accurate timeline TC instead of wall-clock synthesize (default on)
Colorspace Tag — Auto · Rec.709 · Rec.2020 · Display P3 · Linear — embedded as per-frame NDI metadata
Async-safe ping-pong send buffer — no torn frames on slow networks
Custom stream names per output, identical lifecycle as Syphon (Start / Stop / Apply Restart)
Scratch-compatible BGRX FourCC — no white-image alpha bug in Assimilate Scratch
Video only — OFX hosts do not route audio through plugins
NDI® technology by Vizrt — ndi.video

NDI® is a registered trademark of Vizrt NDI AB. NDI functionality is implemented using the NDI SDK subject to the applicable NDI SDK License Agreement and documentation. b3LAB products are independent products and are not affiliated with, sponsored by, or endorsed by Vizrt NDI AB. See ndi.video for more information.

BROADCAST & PRO

Broadcast-grade timing, telemetry & one license for all four

Frame-accurate sync, live health telemetry, broadcast metadata, and a single Gumroad license that unlocks all four plugins. Built for production: signed, notarized, hardened-runtime macOS binary.

Output Sync — Frame Delay 0–200 frames + Fine Delay 0–1000 ms for sub-frame AV-sync with external sources
Health Metrics — live Frames Sent, Frames Dropped, Bandwidth (Mbit/s rolling), Clients Attached per output, updated every 30 frames
Broadcast Tagging — Resolve-Timeline timecode embedded in NDI · colorspace metadata (Rec.709 / Rec.2020 / P3 / Linear)
Lifecycle State Machine — explicit Off / Ready / Starting / Running (with or without clients) / Restart Required / Receiving / Error states surfaced in the UI
Stream Name Draft vs Active — rename never live-mutates a running server; an explicit Apply Name & Restart Stream tears down and rebuilds cleanly
Publish Changed Frames Only — hash-gated publishing skips identical frames (saves bandwidth on static slates)
Source-Loss Fallback — Freeze / Black / Testcard for IN plugins when the upstream source disappears
One license key unlocks all 4 plugins · per-plugin custom stream names · Universal Binary (Apple Silicon + Intel)

Supported Hosts

Host A

DaVinci Resolve Studio

Studio version required. OFX plugins do not render in the free version.

Host B

Assimilate Scratch / LiveFX

Full Syphon and NDI ingest in live and finishing workflows.

⚠ Requires DaVinci Resolve Studio (paid). OFX plugins do not render in the free version. Always verify your Resolve and macOS version against compatibility notes before purchase. Currently supported: macOS 12+, Apple Silicon and Intel. Specific Resolve version matrix in documentation.

// SIGNAL CHAIN

Where this sits in the b3LAB chain.

PortalOFX+ is the routing layer of the b3LAB Creative Signal Network. PulseOSC+ drives the visuals. PortalOFX+ brings the live signal into Resolve or LiveFX. b3WebCam+ monitors, corrects, and exposes the same signal as camera. BatchForge+ turns the rendered output into delivery-ready files.

// BUNDLES

Choose the signal chain you need.

Each bundle is a workflow configuration — not just a discount. Pick the stack that matches how your signals move. One-time purchase, no subscription.

Live Stack

Control + Presence

PulseOSC+ Personal + b3WebCam+ Early Access. €30 (€38). For audio-reactive performance, streaming, teaching, and remote presence.

Hybrid Stack

Routing + Delivery

PortalOFX+ Early Access + BatchForge+ Pro. €65 (€78). Live ingest into Resolve or LiveFX, then clean encoded delivery.

Complete

The full chain

PortalOFX+ EA + PulseOSC+ Personal + b3WebCam+ EA + BatchForge+ Pro. €99 (€116). The full b3LAB Creative Signal Network.

// KNOWN LIMITS

What this is not.

Every b3LAB tool has a clear scope. Knowing the limits is part of the tool.

Tested on macOS 14 and 15 on Apple Silicon. Universal Binary supports Intel; Intel Macs not officially tested.
Requires DaVinci Resolve Studio 19+ or Assimilate Scratch 9.x+. The free Resolve edition does not load OFX plugins. Other OFX hosts (Nuke etc.) are not officially tested.
Video only — OFX plugins cannot route audio. By design, audio routing stays out of scope.
One Syphon or NDI source per plugin instance.
4K signal tested. Higher resolutions untested.
Syphon requires the source app on the same machine. NDI works cross-machine on the local network.
NDI sends as full-bandwidth uncompressed BGRX. NDI HX2/HX3 codec path is on the roadmap (v1.3.0).
Colorspace tagging is embedded in NDI per-frame metadata only. Syphon has no standard colorspace field — receivers ignore tagging there.
Demo mode is fully functional but watermarks the output and reduces framerate. License key (Gumroad) unlocks all 4 plugins.

// COMPATIBILITY

Tested with.

OS: macOS 12.4+ · Universal Binary (Apple Silicon + Intel) · primary HW-test on macOS 14 / 15
Distribution: Notarized DMG → copy bundle to /Library/OFX/Plugins/b3LAB_PortalOFX+.ofx.bundle · Hardened Runtime · Developer ID signed · Apple-stapled
Hosts: DaVinci Resolve Studio 19+ · Assimilate Scratch 9.x+
Plugins: 4 in one bundle — Syphon IN, Syphon OUT, NDI IN, NDI OUT
Source: Syphon (Metal-backed, embedded) · NDI 5/6 SDK (lazy-loaded, optional runtime)
Signal: RGB · RGBA · up to 4K (BGRX FourCC for Scratch compatibility)
Build: v1.2.0 — broadcast tagging (NDI timecode + colorspace), health metrics, explicit Start/Stop lifecycle, source-loss fallback

// USECASES

Who uses it, and how.

Real production scenarios. Each setup is one focused signal path — no glue scripts, no capture detours.

USECASE 01

Lyric slides into the broadcast switch

An online church service needs lyric slides mixed inline with camera cuts, not as a separate window. ProPresenter publishes NDI; Resolve Live picks it up via PortalOFX+ and switches between camera and lyric tracks. Hardware switcher and capture card off the shopping list. Software-only signal flow on one Mac.

USECASE 02

Branded replay wipes pulled live from Resolume

A tournament stream needs branded replay wipes during downtime. The motion designer built them in Resolume; the broadcast desk runs Resolve Live. PortalOFX+ pulls Resolume NDI into Resolve as a wipe track. No extra hardware switcher, the brand wipes hit the air seconds after the build.

USECASE 03

Unreal scene as a Resolve track in virtual production

Director wants to see — at the table read — how camera cuts look against the virtual set lighting. Unreal publishes Spout/Syphon; PortalOFX+ pulls the live frames into Resolve as a track. Edit decisions get made on actual scene lighting, not on grayboxes.

// SHOP

Get PortalOFX+

All licenses include the plugin binary, setup documentation, and email support within the defined scope. Purchases delivered via Gumroad.

Early Access

€39

€79

For early adopters and technically confident users

1 seat · macOS
Syphon IN/OUT + NDI IN/OUT
12 months of updates
Setup documentation
Email support (standard scope)

Early Access — product is functional and actively evolving. Known limits and supported environments are documented.

Buy Early Access →

Not sure? Review the compatibility notes and known limits before purchase. Refunds are considered for non-delivery and clearly documented failures in supported environments — not for unsupported setups or change of mind. See Legal for full policy.

// CONTACT

Get in touch

// LEGAL & TERMS

Legal

License Terms

PortalOFX+ is licensed, not sold. You receive a non-exclusive, non-transferable license to install and use the software according to your purchased license tier.

Permitted: commercial use in creative and production workflows.

Not permitted: resale, sublicensing, redistribution of the plugin, removing attribution, or misrepresenting the plugin as official software from Blackmagic Design, Assimilate, or any third party.

Provided "as is." No guarantee of uninterrupted operation or compatibility with unsupported systems. Liability is limited to the amount paid. Full EULA: EULA - PortalOFX+ v0.1 (PDF version on request).

Updates

Purchases include updates for 12 months from date of purchase. Minor updates (bug fixes, compatibility, diagnostics) are included. Major version upgrades (new architecture, platform expansion) may require a new license or paid upgrade. Future features are goals, not guarantees.

Refund Policy

Please review compatibility notes and known limits before purchase.

Refunds may be considered for: non-delivery, license activation failure, non-functional behavior in a clearly documented and supported environment, or accidental duplicate purchase.

Refunds are not granted for: unsupported systems or Resolve versions, third-party incompatibilities outside documented scope, change of mind after purchase, or unimplemented feature requests.

Mandatory consumer rights apply where required by law. EU statutory withdrawal: for digital products with immediate download access, the right of withdrawal expires upon download initiation, in accordance with Art. 16 m of the EU Consumer Rights Directive (§ 356 V BGB). By initiating the download, you explicitly waive the 14-day withdrawal period.

Support

Standard support covers: installation guidance, setup clarification, basic troubleshooting, and clarification of documented behavior. It does not cover: custom pipeline consulting, feature development, debugging third-party systems, or unsupported workflow engineering.

When reporting an issue, include: macOS version, Resolve version, hardware (Apple Silicon / Intel), source application, and exact reproduction steps.

Trial / Demo

No public trial or demo build is currently available. Before purchase, review the compatibility notes, feature documentation, and Early Access terms. Pre-purchase questions can be directed to [email protected].

Third-Party Components

Product: b3LAB PortalOFX+ · Version 0.1.0 · Publisher: b3LAB · Generated 2026-04-29

This notice lists third-party software, SDKs, frameworks, APIs, trademarks, and optional external runtime dependencies that may be used by this product. PortalOFX+ is an independent b3LAB product. References to third-party names, frameworks, SDKs, trademarks, and file formats are for compatibility, attribution, and interoperability purposes only. No sponsorship, approval, endorsement, certification, or affiliation is implied unless explicitly stated in a signed agreement.

This notice is provided for distribution compliance and transparency. It is not legal advice.

Syphon Framework

Purpose: macOS shared-texture video frame sharing / Syphon input-output compatibility.
Copyright 2010 bangnoise (Tom Butterworth) & vade (Anton Marini). All rights reserved.
License: Simplified BSD / BSD-style license. Source / license reference: github.com/Syphon/Syphon-Framework.

Required notice: Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: (1) Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. (2) Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES.

The names "Syphon", "Syphon Project", and contributor names must not be used to endorse or promote this product without specific prior written permission. PortalOFX+ is compatible with / uses Syphon technology but is not an official Syphon Project product.

OpenFX / OFX API

Purpose: OFX plug-in interface compatibility with supported host applications.
Copyright © OpenFX and contributors to the OpenFX project.
SPDX-License-Identifier: BSD-3-Clause. Source / license reference: github.com/AcademySoftwareFoundation/openfx.

Required notice: Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: (1) Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. (2) Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. (3) Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

DaVinci Resolve, Assimilate SCRATCH / Live FX, and other host application names are trademarks of their respective owners. Compatibility claims do not imply sponsorship, approval, certification, or endorsement.

NDI® SDK / NDI® Runtime

Purpose: Network video send/receive/discovery functionality.
NDI® is a registered trademark of Vizrt NDI AB. Official information: ndi.video.
License references: NDI SDK License Agreement · NDI licensing docs · NDI software distribution docs.

Distribution status for this build: NDI Runtime / SDK binaries are NOT bundled. NDI features require a user-installed official NDI Runtime / NDI Tools installation from ndi.video.

NDI functionality is implemented using the NDI SDK subject to the applicable NDI SDK License Agreement and documentation. b3LAB is independent and is not affiliated with, sponsored by, certified by, or endorsed by Vizrt NDI AB.

Apple System Frameworks and macOS APIs

Components may include: AVFoundation, CoreMedia, CoreVideo, CoreAudio, VideoToolbox, Metal, IOSurface, CoreImage, AppKit, SwiftUI, System Extensions, CMIO Camera Extension APIs, and related Apple platform APIs.
Provider: Apple Inc. License / terms: governed by the applicable Apple Developer Program License Agreement, Apple SDK Agreement, macOS software terms, signing/notarization requirements, and related Apple documentation.

Apple, macOS, Metal, AVFoundation, CoreMedia, CoreVideo, CoreAudio, VideoToolbox, AppKit, SwiftUI, and related names are trademarks of Apple Inc. PortalOFX+ is independent and is not endorsed by Apple.

Supported applications / interoperability names

Names such as DaVinci Resolve, Assimilate SCRATCH, Assimilate Live FX, TouchDesigner, Resolume, MadMapper, Synesthesia, OBS, Zoom, Teams, and similar product names are trademarks of their respective owners. They are mentioned only for compatibility, workflow, or interoperability context. b3LAB products are independent and are not affiliated with, sponsored by, certified by, or endorsed by those vendors unless explicitly stated in a signed agreement.

Full third-party license notices are also included with each app/plugin download package as THIRD_PARTY_NOTICES.txt.

Trademark Acknowledgements

b3LAB and the b3LAB tool names (PortalOFX+, b3WebCam+, PulseOSC+, BatchForge+) are trademarks of Benjamin Mauz / b3LAB. They are independent products. PortalOFX+ and b3WebCam+ are not affiliated with or endorsed by the Syphon Authors, the Open Effects Association, Vizrt NDI AB, Blackmagic Design, Assimilate Inc., or any other third party.

The following are trademarks of their respective owners. Their mention on this website is for descriptive interoperability purposes only ("nominative fair use") and does not imply partnership, endorsement, or affiliation:

Apple, macOS, Apple Silicon, Sonoma, Sequoia, FaceTime, Safari, Photo Booth, Metal, VideoToolbox, AudioToolbox, CoreAudio, Accelerate, ProRes — Apple Inc.
Intel — Intel Corporation
DaVinci Resolve, DaVinci Resolve Studio — Blackmagic Design Pty. Ltd.
Assimilate Scratch, Scratch, LiveFX — Assimilate Inc.
TouchDesigner — Derivative Inc.
Resolume Arena, Resolume — Resolume B.V.
MadMapper — 1024 architecture / Garagecube SA
Synesthesia — Synesthesia Live Ltd.
VDMX — Vidvox LLC
Max — Cycling '74 / Ableton AG
Notch — Notch Limited
Mitti — imimot.com
OBS, OBS Studio — OBS Project
Zoom — Zoom Video Communications, Inc.
Microsoft, Teams — Microsoft Corporation
HAP — Vidvox LLC (open-source codec)
HEVC, H.265, H.264, AVC — respective patent pool licensors (Access Advance, Via LA, MPEG LA)
VP9, WebM — Google LLC
Gumroad — Gumroad Inc.
NDI — Vizrt NDI AB (registered trademark)
Syphon — Syphon Authors (open-source)
OpenFX, OFX — The Open Effects Association

Company Information (Impressum)

Angaben gemäß § 5 DDG:
Benjamin Mauz · Ruländerstr. 3 · 73733 Esslingen am Neckar · Deutschland

E-Mail: [email protected]
Website: b3lab.io

Umsatzsteuer-ID gemäß § 27a UStG: DE277951151

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Known limitations:

Embedded product demo videos do not yet ship with caption tracks. Plain-text transcripts available on request.
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Last reviewed: 2026-04-29.