Remote Controlled Area

Remote Controlled Area widget for trame provide components and communication infrastructure to display remote generated image based content while allowing interaction forwarding such as mouse, touch and multi-pointer devices.

This library aims to provide a core that can then be extended or specialized for any backend. But its initial integration will be focused toward VTK and/or ParaView for enabling interactive remote rendering. But because it aims to be generic, you should be able to rely on its core to connect and drive any kind of backend that could produce images/video-stream and react to mouse interaction.

License

trame-rca is made available under the Apache Software License.

Development

The client-side code is split into a framework-agnostic core (js-components) and Vue/React adapters that depend on it. Install and build the core first, then the adapter(s) you need.

cd js-components
npm i

cd ../vue-components
npm i
npm run build

# optional React adapter
cd ../react-components
npm i
npm run build

cd -

Install the component

pip install -e .

Optional dependencies

TurboJPEG

Faster Jpeg encoding using TurboJPEG.

macOS system install

# macOS
brew install jpeg-turbo

Windows install

Download and install from Github: https://github.com/libjpeg-turbo/libjpeg-turbo/releases

Linux install

# RHEL/CentOS/Fedora
# YUM doc: https://libjpeg-turbo.org/Downloads/YUM

# Ubuntu
apt-get install libturbojpeg

Once your system is ready, you can try our code example:

pip install trame trame-vuetify vtk
pip install "trame-rca[turbo]"

# other encoders: jpeg, avif, turbo-jpeg, png, webp
python ./examples/01_vtk/vtk_cone_simple.py --encoder turbo-jpeg

Video encoding with VTKStreaming

VTKStreaming provides tools for encoding and streaming frames from a VTK OpenGL render window using video codecs. When NVENC is available, it enables H.264/H.265 hardware encoding; otherwise, software encoding falls back to VP9 via libvpx.

The codec is negotiated when the video-decoder display mounts: the client asks the server which codecs it can encode (trame.rca.video.codecs), filters them with VideoDecoder.isConfigSupported, and sends the accepted list back (trame.rca.video.negotiate). The server then creates the encoder with vtkEncoderFactory preferences Hardware=true;Codec=<accepted list>. No frames are pushed before negotiation. Pass on_video_codec to create_view_handler to be told what was selected (codec, backend, hardware, label or error).

You can try our code example:

pip install trame trame-vuetify vtk
pip install "trame-rca[vtkstreaming]"

python ./examples/05_video/vtk_cone_simple_video.py

In order to use source-build of vtkstreaming, please clone [VTKStreaming](https://github.com/Kitware/VTKStreaming.git) one level up outside the trame-rca directory, checkout the wheel branch, and install it inside the trame-rca virtual environment

cd ..
git clone https://github.com/Kitware/VTKStreaming.git
cd VTKstreaming
uv pip install --group dev          # build deps into active venv; index from tool.uv.index
uv pip install -e . --no-build-isolation
cd ../trame-rca

python ./examples/05_video/vtk_cone_simple_video.py

Release files for trame-rca 2.11.3

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for trame-rca 2.11.3
File	Size	Uploaded
trame_rca-2.11.3.tar.gz	68.1 kB	Sep 18, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for trame-rca 2.11.3
File	Interpreter	ABI	Platform	Reset
trame_rca-2.11.3-py3-none-any.whl 77.6 kB Sep 18, 2026	Python 3	none	any	Details

Total release size: 145.6 kB

Release files / trame_rca-2.11.3.tar.gz

Download URL	trame_rca-2.11.3.tar.gz
Size	68.1 kB
Tags	Source
SHA-256 checksum How to use checksums	`54c8c42dbea7aeaf2d8dfcb22d492ee944e92bb1ad988ffd6d14b49a8568cc38`
BLAKE2b-256 checksum How to use checksums	`4abc3b01e2c7b7831d8d8e948ba840ab0ae91c868bf72d87dc8219ca4d3fe6ae`
Upload date	Sep 18, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/7.0.0 CPython/3.13.14`

Provenance

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Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/Kitware/trame-rca
Publishing commit: github.com/Kitware/trame-rca/tree/d2aee30a19d3c2ceda6f14edac0cce54d864fa85

Workflow

Publishing configuration: github.com/Kitware/trame-rca/blob/d2aee30a19d3c2ceda6f14edac0cce54d864fa85/.github/workflows/test_and_release.yml
Publishing logs: github.com/Kitware/trame-rca/actions/runs/35376062971/attempts/1

Artifact

Subject: trame_rca-2.11.3.tar.gz
SHA-256 checksum: 54c8c42dbea7aeaf2d8dfcb22d492ee944e92bb1ad988ffd6d14b49a8568cc38 Verifying attestations

Release files / trame_rca-2.11.3-py3-none-any.whl

Download URL	trame_rca-2.11.3-py3-none-any.whl
Size	77.6 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`3913b80b9a8477b80ef02080d998d5bbd8c32cf48f60345fe54a74ec4a933668`
BLAKE2b-256 checksum How to use checksums	`41d1290fbbeba41b900c41da53a44c39cf92db4d2fa35c88177d0dc4dfc90012`
Upload date	Sep 18, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/7.0.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/Kitware/trame-rca
Publishing commit: github.com/Kitware/trame-rca/tree/d2aee30a19d3c2ceda6f14edac0cce54d864fa85

Workflow

Publishing configuration: github.com/Kitware/trame-rca/blob/d2aee30a19d3c2ceda6f14edac0cce54d864fa85/.github/workflows/test_and_release.yml
Publishing logs: github.com/Kitware/trame-rca/actions/runs/35376062971/attempts/1

Artifact

Subject: trame_rca-2.11.3-py3-none-any.whl
SHA-256 checksum: 3913b80b9a8477b80ef02080d998d5bbd8c32cf48f60345fe54a74ec4a933668 Verifying attestations