Rerun is an easy-to-use database and visualization toolbox for multimodal and temporal data. Try it live at https://rerun.io/viewer.

• Python: pip install rerun-sdk
• Rust: cargo add rerun and cargo install rerun-cli --locked
• Online demo: https://rerun.io/viewer
• C++ FetchContent: https://github.com/rerun-io/rerun/releases/download/0.29.0/rerun_cpp_sdk.zip

🧳 Migration guide: https://rerun.io/docs/reference/migration/migration-0-29

✨ Overview & highlights

URDF loader improvements

In the previous 0.28 release, we overhauled Rerun's built-in URDF loader to work with TF-style transforms with parent and child frames. Now, taking advantage of these entity-path-independent transforms, we simplified the hierarchy in which URDF assets are stored. Collision and visual meshes are now below separate entity path roots, making it easy to toggle one or the other. Additionally, the paths are now more compact to make it easier to scroll through them.

https://github.com/user-attachments/assets/7a3f6112-e87f-4249-977b-ed9944e2c356

UrdfTree utility in Python

We added a UrdfTree Python utility that can be used to simplify operations with URDF models, e.g.:

• accessing links and joints
• computing transforms from joint states
• retrieving geometry entity paths for links

We also updated our animated_urdf.py demo to use this utility, showing for example how you can dynamically change the color of a gripper link based on its angle.

https://github.com/user-attachments/assets/e0b6882f-b5dd-47d9-9afc-3ea30bc38e28

Experimental screenshots from Python

There's now an experimental screenshot API which allows to take screenshots of the Viewer or individual views:

# Connect to a local viewer.
viewer = ViewerClient()
# Screenshot the entire viewer.
viewer.save_screenshot("entire_viewer.jpg")
# Screenshot only the view we created earlier.
viewer.save_screenshot("my_view.png", view_id=view.id)

For a full snippet check here.

⚠️ There's still a lot of rough edges and this API may change in the future.

Improved target frame selection UI

The target frame selection UI now shows matching suggestions, making it easier to select a frame name from the transforms in your data.

https://github.com/user-attachments/assets/4ba25a41-de6a-4209-bd06-c31a33d8d993

Updated ROS 2 example & documentation

We refreshed the documentation showing examples of how some ROS concepts and messages can be mapped to Rerun, together with an updated Python node example. The documentation page can be found here.

Improved memory panel

You can now get some insight on which parts of your recording use how much memory in the viewer using the improved memory panel:

⚠️ Breaking changes

• Python: New API for visualizer overrides - VisualizerOverrides removed, now pass visualizer objects directly (e.g., rr.SeriesLines())
• Python: Entry.update() deprecated in favor of Entry.set_name()
• Python: CatalogClient and Server constructor parameters renamed (addr → url/host)
• Python: Removed deprecated rerun.dataframe module (use rerun.server.Server and rerun.catalog instead)
• Python: Removed deprecated rerun.catalog APIs from 0.28
• Python: Internal submodules moved to underscore-prefixed names (e.g., rr.color_conversion → rr._color_conversion)
• CLI: rerun server --addr renamed to rerun server --host
• Blueprint: Component overrides from .rbl files created in previous versions cannot be loaded in 0.29
• Data Platform: Datasets need re-registration to populate name and start_time in segment table

🧳 Check the migration guide for details: https://rerun.io/docs/reference/migration/migration-0-29

🔎 Details

🪵 Log API

• Fix dropping of entities when using rerun rrd filter #12584
• Apply backpressure in gRPC proxy server cac538e
• Enforce Selector usage in re_sdk::lenses 521c796

🐍 Python API

• Allow tables to be created without providing a URL #12132
• Remove deprecated dataframe API (rerun.dataframe) #12320
• Remove deprecated APIs in rerun.catalog #12321
• Deprecate Entry.update in favor of Entry.set_name #12370
• Fix missing child_frame/parent_frame arguments from pinhole constructor #12360
• Use visualizer objects in blueprint override API #12345
• Rename address to url or host depending on context #12402
• Check for unset attr from extension class init #12376
• Add time axis in snippet in time series view snippet #12506
• Fix RecordingStream so it has a unique recording id when none is provided eb14e16
• Do not assume top-level bindings in RecordingStream.__del__ 201e7c3
• Fix rare deadlock in Python send/log API 7f72b23
• Catch keyboard interrupt in rerun-sdk CLI and return exit codes #12496
• Make rr.experimental.ViewerClient.send_table more flexible ba733ad

🦀 Rust API

• Allow tables to be created without providing a URL #12132
• Rust SDK: blueprint support #12307 (thanks @sectore!)
• Update MSRV to 1.90 #12337
• Make RecordingStreamBuilder::with_blueprint() apply to everything, not just spawn() #12347 (thanks @kpreid!)
• Rust SDK: Change default server memory limit 5cb7213
• Update ply-rs-bw to 3.0.0 (corrected) #12593 (thanks @bourumir-wyngs!)

🪳 Bug fixes

• Fix bad error reporting when registering a (faulty) RRD URI built from a relative path #12309
• Only do furthest_from GC when we can download chunks again #12363
• URDF loader: use InstancePoses3D for geometry scale #12371
• Fix incorrect handling for cameras and depth images for 3D views that use target frames other than the scene root #12361
• Fix OSS server locking up when asked for many chunks at once #12384
• Fix GC sometimes not collecting anything #12398
• URDF: Bundle pose + mesh scale in single InstancePoses3D #12385 (thanks @yujeong1jeong!)
• Don't show error for implicit transform axes if we're already showing named transforms #12419
• Fix opening link with only time selection in fragment #12428
• Fix decoding errors for MCAP files with gaps in protobufs #12436
• Fix time point sharing for duration timelines #12466
• Fix transforms & videos breaking when receiving new data in the background #12452
• Fix ignoring nested oneof fields in protobuf MCAP messages #12462
• Fix early disconnect with --newest-first #12484
• Fix: tap stream view to move time cursor #12476
• Fix RecordingInfo properties not included in the segment table 3781b18
• Fix DAE import crash caused by duplicate XML id attributes #12555 (thanks @yujeong1jeong!)
• Warn when logging transform at / without set parent_frame #12588
• Fix sensor_msgs::PointCloud2 MCAP parser for small pointclouds f705229

🌁 Viewer improvements

• Automatically cast to Float64Array in time series views #12342
• Show loaded indicator when time panel is collapsed #12396
• Video stream changes to support out of order samples #12277
• Measure and display network latency to redap servers #12426
• Enable vulkan backend for Mac Viewer builds, select graphics adapter more explicitly internally #12449
• More robust world grid rendering #12444
• Display downloaded & max size of recording in selection panel #12429
• Allow multiple visualizers of same type per Entity #12275
• Warn if an entity has multiple CoordinateFrame instances #12514
• Fix case of unstable camera image plane distance #12559
• Simplify memory panel with more tabs 9dada34

🚀 Performance improvements

• Implement backpressure in re_log_channel 3a25a25

🧑‍🏫 Examples

• Modernize ros_node example and documentation #11968
• Add MCAP example #12353
• Add eye control example #12459
• Use optical flow tracking in detect and track objects example #12564
• Show dynamic mesh update in animated_urdf.py example #12571

📚 Docs

• Reshuffle documentation organization #12355
• Update documentation about MCAP ROS 2 message support #12406
• feat: Add the SAM 3D Body example #12499 (thanks @pablovela5620!)
• Add how to guide on querying videos 5a36526
• Mention memory limit settings UI in docs 50ebee6
• docs(sdk): add thread safety warning for log() with mutexes #12579 (thanks @ecto!)

🖼 UI improvements

• Add user menu #12336
• Larger than ram time panel UI #12338
• Improved auth section in server modal #12369
• Show info message after screenshot from command palette #12465
• Display chunk download bandwidth #12451
• Fix icon colors in light theme edac1a1

🇸🇪 Name

This release has a name — Riddarholmen!