Windows x64 Spout2 input/output bindings prepared and tested for Redot 26.3. This package is a Redot-focused rebuild of you-win/spout-gd, with a narrow compatibility and diagnostics patch for reliable SpoutViewport output.
Version: 0.2.0-alpha.1 (Unreleased)
This fork preserves the upstream history and contains the patched C++ source, pinned submodules, prebuilt Windows binaries, demo project, smoke test, build provenance, and release packaging. It is based on upstream commit 867b32d.
The previous published installable ZIP is available from the v0.1.0-alpha.1 prerelease.
- Tested with Redot
26.3.stable.official.85e520394on Windows x64. - The source builds against the pinned redot-cpp 26.2 fork;
compatibility_minimum = 4.5matches its generated compatibility version. The checked-in DLLs predate this binding switch. - Forward+/D3D12 output works through synchronous GPU-to-CPU image readback.
- Verified in a local portable OBS 32.1.2 copy at 1920x1080 RGBA and 60 FPS using the Spout2 OBS plugin.
- Live animation, alpha, same-GPU operation, and sender reconnect were verified.
- Direct OpenGL texture sharing is experimental and disabled by default because Spout's GL/DX interop terminates the tested Redot/NVIDIA configuration.
- Spout carries video only. Capture application audio separately in OBS.
This is an alpha package. The readback path is functional but is not zero-copy, and end-to-end latency still needs comparison against OBS Game/Window Capture under representative load.
- Download the Windows x64 release ZIP.
- Extract it into the root of a Redot project.
- Confirm this file exists:
res://addons/spout-gd/spout_gd.gdextension. - Restart the Redot editor so it imports and loads the GDExtension.
- Confirm
ClassDB.class_exists(&"SpoutViewport")from GDScript.
This is a runtime GDExtension, not an EditorPlugin; there is no plugin.cfg checkbox to enable. Redot discovers the .gdextension descriptor automatically.
extends Node
var program: SubViewport
func _ready() -> void:
assert(ClassDB.class_exists(&"SpoutViewport"))
program = ClassDB.instantiate(&"SpoutViewport") as SubViewport
program.name = "ProgramOutput"
program.size = Vector2i(1920, 1080)
program.transparent_bg = true
program.render_target_update_mode = SubViewport.UPDATE_ALWAYS
program.set("sender_name", "MyRedotProgram")
add_child(program)
# Add the 2D/3D content to publish as children of program.For the tested path, use Forward+ with the D3D12 rendering driver and leave prefer_direct_texture disabled.
The repository checkout includes a demo project and smoke test. Open its root as a Redot project and run it. The demo publishes RedotSpoutDemo, displays the same animated RGBA viewport locally, and writes user://redot_spout_demo_report.json.
Headless bridge smoke check:
pwsh tests/run_tests.ps1 -Driver d3d12
pwsh tests/run_tests.ps1 -Driver vulkanThe install ZIP contains only addons/spout-gd/, including its README and license notices. It intentionally omits project.godot, demo, and tests so extracting it cannot replace a target project's settings or add sample content. Those files remain available in the repository checkout.
The repository also retains the native source under src/. The tested DLLs in addons/spout-gd are checked in so users do not need a C++ toolchain. Contributors can reproduce them using docs/BUILDING.md.
See docs/API.md, docs/BUILDING.md, THIRD_PARTY.md, and CHANGELOG.md.
Spout-GD and this derivative patch are distributed under MPL-2.0. Spout2 is distributed under the BSD 2-Clause license. Exact license texts are retained under addons/spout-gd, with pinned revisions and binary hashes in THIRD_PARTY.md.
I vibe coded this in GPT Sol 5.6. Use at your own risk.
Greetings! I am Dominic Bytes, the synth walker. I hail from the distant future. Where brains occupy robot bodies, time travel is a trip to the corner store, and the neon glow of our attire is powered by the light of our souls. Join me on a 1.21 gigawatt powered journey of chill vibes with gaming, anime, movies, and more!