Failed to parse channel schema on example_msg

[windsice]

Description
I was trying out the Cpp live example_server, and got the following error when I try to view the data. I tried with the python server example, that one works, but not the cpp, can someone can look into that? thanks.

Failed to parse channel schema on example_msg
Error: invalid encoding
at base64.decode (file:///snap/foxglove-studio/20/resources/app.asar/renderer/main.js:434:42123)
at EventEmitter. (file:///snap/foxglove-studio/20/resources/app.asar/renderer/main.js:4808:481)
at EventEmitter.emit (file:///snap/foxglove-studio/20/resources/app.asar/renderer/main.js:1202:12257)
at ws.onmessage (file:///snap/foxglove-studio/20/resources/app.asar/renderer/main.js:4807:210908)

• Version:
• Platform: cpp

Steps To Reproduce

make example_server under the cpp folder.

Expected Behavior
Able to see protobuf message from studio.

Actual Behavior
Shows up the error as what Description described.

[jtbandes]

When I run make build and make example_server, and connect Studio, I see this:

Screen.Recording.2022-11-21.at.3.47.24.PM.mov

Which version of studio are you using? Does it work on studio.foxglove.dev?

[windsice]

Thanks for the quick reply, it's Foxglove Studio version 1.31.1 in ubuntu, it does not work on studio.foxglove.dev, shows a similar error.

Error: invalid encoding
at base64.decode (https://studio.foxglove.dev/main.0d7c912f92ef77188316.js:434:42123)
at EventEmitter. (https://studio.foxglove.dev/main.0d7c912f92ef77188316.js:1499:481)
at EventEmitter.emit (https://studio.foxglove.dev/main.0d7c912f92ef77188316.js:1202:12268)
at ws.onmessage (https://studio.foxglove.dev/main.0d7c912f92ef77188316.js:1498:204357)

[jtbandes]

Have you modified anything in the example server? This sounds like a base64 decoding error, coming from here. Can you use the chrome dev tools to inspect the websocket messages and see what channel/schema data the app is receiving?

[windsice]

I have not modified anything in the server.
Here's what I see from the localhost.

{channels: [{encoding: "protobuf", id: 1,…}], op: "advertise"}
channels: [{encoding: "protobuf", id: 1,…}]
0: {encoding: "protobuf", id: 1,…}
encoding: "protobuf"
id: 1
schema: "C\u0000gBChpmb3hnbG92ZS9TY2VuZVVwZGF0ZS5wcm90bxIIZm94Z2xvdmUaGmZveGdsb3ZlL1NjZW5lRW50aXR5LnByb3RvGiJmb3hnbG92ZS9TY2VuZUVudGl0eURlbGV0aW9uLnByb3RvImgKC1NjZW5lVXBkYXRlEjAKCWRlbGV0aW9ucxgBIAMoCzIdLmZveGdsb3ZlLlNjZW5lRW50aXR5RGVsZXRpb24SJwoIZW50aXRpZXMYAiADKAsyFS5mb3hnbG92ZS5TY2VuZUVudGl0eWIGcHJvdG8zC\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\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\u0000+AQoiZm94Z2xvdmUvU2NlbmVFbnRpdHlEZWxldGlvbi5wcm90bxIIZm94Z2xvdmUaH2dvb2dsZS9wcm90b2J1Zi90aW1lc3RhbXAucHJvdG8i+AEKE1NjZW5lRW50aXR5RGVsZXRpb24SLQoJdGltZXN0YW1wGAEgASgLMhouZ29vZ2xlLnByb3RvYnVmLlRpbWVzdGFtcBIwCgR0eXBlGAIgASgOMiIuZm94Z2xvdmUuU2NlbmVFbnRpdHlEZWxldGlvbi5UeXBlEgoKAmlkGAMgASgJIiAKBFR5cGUSDwoLTUFUQ0hJTkdfSUQQABIHCgNBTEwQAWIGcHJvdG8zC\u0000cCCh1mb3hnbG92ZS9BcnJvd1ByaW1pdGl2ZS5wcm90bxIIZm94Z2xvdmUaFGZveGdsb3ZlL0NvbG9yLnByb3RvGhNmb3hnbG92ZS9Qb3NlLnByb3RvI\u0000gBCg5BcnJvd1ByaW1pdGl2ZRIcCgRwb3NlGAEgASgLMg4uZm94Z2xvdmUuUG9zZRIUCgxzaGFmdF9sZW5ndGgYAiABKAESFgoOc2hhZnRfZGlhbWV0ZXIYAyABKAESEwoLaGVhZF9sZW5ndGgYBCABKAESFQoNaGVhZF9kaWFtZXRlchgFIAEoARIeCgVjb2xvchgGIAEoCzIPLmZveGdsb3ZlLkNvbG9yYgZwcm90bzMK\u0000wEKHGZveGdsb3ZlL0N1YmVQcmltaXRpdmUucHJvdG8SCGZveGdsb3ZlGhRmb3hnbG92ZS9Db2xvci5wcm90bxoTZm94Z2xvdmUvUG9zZS5wcm90bxoWZm94Z2xvdmUvVmVjdG9yMy5wcm90byJuCg1DdWJlUHJpbWl0aXZlEhwKBHBvc2UYASABKAsyDi5mb3hnbG92ZS5Qb3NlEh8KBHNpemUYAiABKAsyES5mb3hnbG92ZS5WZWN0b3IzEh4KBWNvbG9yGAMgASgLMg8uZm94Z2xvdmUuQ29sb3JiBnByb3RvMw\u0000VAgogZm94Z2xvdmUvQ3lsaW5kZXJQcmltaXRpdmUucHJvdG8SCGZveGdsb3ZlGhRmb3hnbG92ZS9Db2xvci5wcm90bxoTZm94Z2xvdmUvUG9zZS5wcm90bxoWZm94Z2xvdmUvVmVjdG9yMy5wcm90by\u0000bAQoRQ3lsaW5kZXJQcmltaXRpdmUSHAoEcG9zZRgBIAEoCzIOLmZveGdsb3ZlLlBvc2USHwoEc2l6ZRgCIAEoCzIRLmZveGdsb3ZlLlZlY3RvcjMSFAoMYm90dG9tX3NjYWxlGAMgASgBEhEKCXRvcF9zY2FsZRgEIAEoARIeCgVjb2xvchgFIAEoCzIPLmZveGdsb3ZlLkNvbG9yYgZwcm90bzMKWwobZm94Z2xvdmUvS2V5VmFsdWVQYWlyLnByb3RvEghmb3hnbG92ZSIqCgxLZXlWYWx1ZVBhaXISCwoDa2V5GAEgASgJEg0KBXZhbHVlGAIgASgJYgZwcm90bzMK+AMKHGZveGdsb3ZlL0xpbmVQcmltaXRpdmUucHJvdG8SCGZveGdsb3ZlGhRmb3hnbG92ZS9Db2xvci5wcm90bxoVZm94Z2xvdmUvUG9pbnQzLnByb3RvGhNmb3hnbG92ZS9Qb3NlLnByb3RvI\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.wEKDk1vZGVsUHJpbWl0aXZlEhwKBHBvc2UYASABKAsyDi5mb3hnbG92ZS5Qb3NlEiAKBXNjYWxlGAIgASgLMhEuZm94Z2xvdmUuVmVjdG9yMxIeCgVjb2xvchgDIAEoCzIPLmZveGdsb3ZlLkNvbG9yEhYKDm92ZXJyaWRlX2NvbG9yGAQgASgIEgsKA3VybBgFIAEoCRISCgptZWRpYV90eXBlGAYgASgJEgwKBGRhdGEYByABKAxiBnByb3RvMw\u0000nAQoeZm94Z2xvdmUvU3BoZXJlUHJpbWl0aXZlLnByb3RvEghmb3hnbG92ZRoUZm94Z2xvdmUvQ29sb3IucHJvdG8aE2ZveGdsb3ZlL1Bvc2UucHJvdG8aFmZveGdsb3ZlL1ZlY3RvcjMucHJvdG8icAoPU3BoZXJlUHJpbWl0aXZlEhwKBHBvc2UYASABKAsyDi5mb3hnbG92ZS5Qb3NlEh8KBHNpemUYAiABKAsyES5mb3hnbG92ZS5WZWN0b3IzEh4KBWNvbG9yGAMgASgLMg8uZm94Z2xvdmUuQ29sb3JiBnByb3RvMw\u00004AQocZm94Z2xvdmUvVGV4dFByaW1pdGl2ZS5wcm90bxIIZm94Z2xvdmUaFGZveGdsb3ZlL0NvbG9yLnByb3RvGhNmb3hnbG92ZS9Qb3NlLnByb3RvI\u0000oBCg1UZXh0UHJpbWl0aXZlEhwKBHBvc2UYASABKAsyDi5mb3hnbG92ZS5Qb3NlEhEKCWJpbGxib2FyZBgCIAEoCBIRCglmb250X3NpemUYAyABKAESFwoPc2NhbGVfaW52YXJpYW50GAQgASgIEh4KBWNvbG9yGAUgASgLMg8uZm94Z2xvdmUuQ29sb3ISDAoEdGV4dBgGIAEoCWIGcHJvdG8zC\u0000YCCiRmb3hnbG92ZS9UcmlhbmdsZUxpc3RQcmltaXRpdmUucHJvdG8SCGZveGdsb3ZlGhRmb3hnbG92ZS9Db2xvci5wcm90bxoVZm94Z2xvdmUvUG9pbnQzLnByb3RvGhNmb3hnbG92ZS9Qb3NlLnByb3RvI\u0000kBChVUcmlhbmdsZUxpc3RQcmltaXRpdmUSHAoEcG9zZRgBIAEoCzIOLmZveGdsb3ZlLlBvc2USIAoGcG9pbnRzGAIgAygLMhAuZm94Z2xvdmUuUG9pbnQzEh4KBWNvbG9yGAMgASgLMg8uZm94Z2xvdmUuQ29sb3ISHwoGY29sb3JzGAQgAygLMg8uZm94Z2xvdmUuQ29sb3ISDwoHaW5kaWNlcxgFIAMoB2IGcHJvdG8zC\u0000sBCh5nb29nbGUvcHJvdG9idWYvZHVyYXRpb24ucHJvdG8SD2dvb2dsZS5wcm90b2J1ZiIqCghEdXJhdGlvbhIPCgdzZWNvbmRzGAEgASgDEg0KBW5hbm9zGAIgASgFQ\u0000MBChNjb20uZ29vZ2xlLnByb3RvYnVmQg1EdXJhdGlvblByb3RvUAFaMWdvb2dsZS5nb2xhbmcub3JnL3Byb3RvYnVmL3R5cGVzL2tub3duL2R1cmF0aW9ucG\u00004AQ\u0000iAgNHUE\u0000qAh5Hb29nbGUuUHJvdG9idWYuV2VsbEtub3duVHlwZXNiBnByb3RvMw\u0000vAQofZ29vZ2xlL3Byb3RvYnVmL3RpbWVzdGFtcC5wcm90bxIPZ29vZ2xlLnByb3RvYnVmIisKCVRpbWVzdGFtcBIPCgdzZWNvbmRzGAEgASgDEg0KBW5hbm9zGAIgASgFQ\u0000UBChNjb20uZ29vZ2xlLnByb3RvYnVmQg5UaW1lc3RhbXBQcm90b1ABWjJnb29nbGUuZ29sYW5nLm9yZy9wcm90b2J1Zi90eXBlcy9rbm93bi90aW1lc3RhbXBwY\u0000gBA\u0000ICA0dQQ\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"
schemaName: "foxglove.SceneUpdate"
topic: "example_msg"
op: "advertise"

Also did that for the python server that works.

{op: "advertise",…}
channels: [{id: 0, topic: "example_msg", encoding: "protobuf", schemaName: "ExampleMsg",…}]
0: {id: 0, topic: "example_msg", encoding: "protobuf", schemaName: "ExampleMsg",…}
encoding: "protobuf"
id: 0
schema: "ClAKEEV4YW1wbGVNc2cucHJvdG8iNAoKRXhhbXBsZU1zZxIQCgNtc2cYASABKAlSA21zZxIUCgVjb3VudBgCIAEoBVIFY291bnRiBnByb3RvMw=="
schemaName: "ExampleMsg"
topic: "example_msg"
op: "advertise"

Are they meant to be different? The fact that cpp version shows up to have a 'C\u' seems like an issue, what can I do for the decoding?

[jtbandes]

Yes, the \u0000 (null byte) is definitely wrong. It could be an error in this function, but I don't see the same error. On my machine I get:

CtgBChpmb3hnbG92ZS9TY2VuZVVwZGF0ZS5wcm90bxIIZm94Z2xvdmUaGmZveGdsb3ZlL1NjZW5lRW50aXR5LnByb3RvGiJmb3hnbG92ZS9TY2VuZUVudGl0eURlbGV0aW9uLnByb3RvImgKC1NjZW5lVXBkYXRlEjAKCWRlbGV0aW9ucxgBIAMoCzIdLmZveGdsb3ZlLlNjZW5lRW50aXR5RGVsZXRpb24SJwoIZW50aXRpZXMYAiADKAsyFS5mb3hnbG92ZS5TY2VuZUVudGl0eWIGcHJvdG8zCrIHChpmb3hnbG92ZS9TY2VuZUVudGl0eS5wcm90bxIIZm94Z2xvdmUaHWZveGdsb3ZlL0Fycm93UHJpbWl0aXZlLnByb3RvGhxmb3hnbG92ZS9DdWJlUHJpbWl0aXZlLnByb3RvGiBmb3hnbG92ZS9DeWxpbmRlclByaW1pdGl2ZS5wcm90bxobZm94Z2xvdmUvS2V5VmFsdWVQYWlyLnByb3RvGhxmb3hnbG92ZS9MaW5lUHJpbWl0aXZlLnByb3RvGh1mb3hnbG92ZS9Nb2RlbFByaW1pdGl2ZS5wcm90bxoeZm94Z2xvdmUvU3BoZXJlUHJpbWl0aXZlLnByb3RvGhxmb3hnbG92ZS9UZXh0UHJpbWl0aXZlLnByb3RvGiRmb3hnbG92ZS9UcmlhbmdsZUxpc3RQcmltaXRpdmUucHJvdG8aHmdvb2dsZS9wcm90b2J1Zi9kdXJhdGlvbi5wcm90bxofZ29vZ2xlL3Byb3RvYnVmL3RpbWVzdGFtcC5wcm90byKjBAoLU2NlbmVFbnRpdHkSLQoJdGltZXN0YW1wGAEgASgLMhouZ29vZ2xlLnByb3RvYnVmLlRpbWVzdGFtcBIQCghmcmFtZV9pZBgCIAEoCRIKCgJpZBgDIAEoCRIrCghsaWZldGltZRgEIAEoCzIZLmdvb2dsZS5wcm90b2J1Zi5EdXJhdGlvbhIUCgxmcmFtZV9sb2NrZWQYBSABKAgSKAoIbWV0YWRhdGEYBiADKAsyFi5mb3hnbG92ZS5LZXlWYWx1ZVBhaXISKAoGYXJyb3dzGAcgAygLMhguZm94Z2xvdmUuQXJyb3dQcmltaXRpdmUSJgoFY3ViZXMYCCADKAsyFy5mb3hnbG92ZS5DdWJlUHJpbWl0aXZlEioKB3NwaGVyZXMYCSADKAsyGS5mb3hnbG92ZS5TcGhlcmVQcmltaXRpdmUSLgoJY3lsaW5kZXJzGAogAygLMhsuZm94Z2xvdmUuQ3lsaW5kZXJQcmltaXRpdmUSJgoFbGluZXMYCyADKAsyFy5mb3hnbG92ZS5MaW5lUHJpbWl0aXZlEjIKCXRyaWFuZ2xlcxgMIAMoCzIfLmZveGdsb3ZlLlRyaWFuZ2xlTGlzdFByaW1pdGl2ZRImCgV0ZXh0cxgNIAMoCzIXLmZveGdsb3ZlLlRleHRQcmltaXRpdmUSKAoGbW9kZWxzGA4gAygLMhguZm94Z2xvdmUuTW9kZWxQcmltaXRpdmViBnByb3RvMwr+AQoiZm94Z2xvdmUvU2NlbmVFbnRpdHlEZWxldGlvbi5wcm90bxIIZm94Z2xvdmUaH2dvb2dsZS9wcm90b2J1Zi90aW1lc3RhbXAucHJvdG8ipAEKE1NjZW5lRW50aXR5RGVsZXRpb24SLQoJdGltZXN0YW1wGAEgASgLMhouZ29vZ2xlLnByb3RvYnVmLlRpbWVzdGFtcBIwCgR0eXBlGAIgASgOMiIuZm94Z2xvdmUuU2NlbmVFbnRpdHlEZWxldGlvbi5UeXBlEgoKAmlkGAMgASgJIiAKBFR5cGUSDwoLTUFUQ0hJTkdfSUQQABIHCgNBTEwQAWIGcHJvdG8zCocCCh1mb3hnbG92ZS9BcnJvd1ByaW1pdGl2ZS5wcm90bxIIZm94Z2xvdmUaFGZveGdsb3ZlL0NvbG9yLnByb3RvGhNmb3hnbG92ZS9Qb3NlLnByb3RvIqgBCg5BcnJvd1ByaW1pdGl2ZRIcCgRwb3NlGAEgASgLMg4uZm94Z2xvdmUuUG9zZRIUCgxzaGFmdF9sZW5ndGgYAiABKAESFgoOc2hhZnRfZGlhbWV0ZXIYAyABKAESEwoLaGVhZF9sZW5ndGgYBCABKAESFQoNaGVhZF9kaWFtZXRlchgFIAEoARIeCgVjb2xvchgGIAEoCzIPLmZveGdsb3ZlLkNvbG9yYgZwcm90bzMK4wEKHGZveGdsb3ZlL0N1YmVQcmltaXRpdmUucHJvdG8SCGZveGdsb3ZlGhRmb3hnbG92ZS9Db2xvci5wcm90bxoTZm94Z2xvdmUvUG9zZS5wcm90bxoWZm94Z2xvdmUvVmVjdG9yMy5wcm90byJuCg1DdWJlUHJpbWl0aXZlEhwKBHBvc2UYASABKAsyDi5mb3hnbG92ZS5Qb3NlEh8KBHNpemUYAiABKAsyES5mb3hnbG92ZS5WZWN0b3IzEh4KBWNvbG9yGAMgASgLMg8uZm94Z2xvdmUuQ29sb3JiBnByb3RvMwqVAgogZm94Z2xvdmUvQ3lsaW5kZXJQcmltaXRpdmUucHJvdG8SCGZveGdsb3ZlGhRmb3hnbG92ZS9Db2xvci5wcm90bxoTZm94Z2xvdmUvUG9zZS5wcm90bxoWZm94Z2xvdmUvVmVjdG9yMy5wcm90byKbAQoRQ3lsaW5kZXJQcmltaXRpdmUSHAoEcG9zZRgBIAEoCzIOLmZveGdsb3ZlLlBvc2USHwoEc2l6ZRgCIAEoCzIRLmZveGdsb3ZlLlZlY3RvcjMSFAoMYm90dG9tX3NjYWxlGAMgASgBEhEKCXRvcF9zY2FsZRgEIAEoARIeCgVjb2xvchgFIAEoCzIPLmZveGdsb3ZlLkNvbG9yYgZwcm90bzMKWwobZm94Z2xvdmUvS2V5VmFsdWVQYWlyLnByb3RvEghmb3hnbG92ZSIqCgxLZXlWYWx1ZVBhaXISCwoDa2V5GAEgASgJEg0KBXZhbHVlGAIgASgJYgZwcm90bzMKpAMKHGZveGdsb3ZlL0xpbmVQcmltaXRpdmUucHJvdG8SCGZveGdsb3ZlGhRmb3hnbG92ZS9Db2xvci5wcm90bxoVZm94Z2xvdmUvUG9pbnQzLnByb3RvGhNmb3hnbG92ZS9Qb3NlLnByb3RvIq8CCg1MaW5lUHJpbWl0aXZlEioKBHR5cGUYASABKA4yHC5mb3hnbG92ZS5MaW5lUHJpbWl0aXZlLlR5cGUSHAoEcG9zZRgCIAEoCzIOLmZveGdsb3ZlLlBvc2USEQoJdGhpY2tuZXNzGAMgASgBEhcKD3NjYWxlX2ludmFyaWFudBgEIAEoCBIgCgZwb2ludHMYBSADKAsyEC5mb3hnbG92ZS5Qb2ludDMSHgoFY29sb3IYBiABKAsyDy5mb3hnbG92ZS5Db2xvchIfCgZjb2xvcnMYByADKAsyDy5mb3hnbG92ZS5Db2xvchIPCgdpbmRpY2VzGAggAygHIjQKBFR5cGUSDgoKTElORV9TVFJJUBAAEg0KCUxJTkVfTE9PUBABEg0KCUxJTkVfTElTVBACYgZwcm90bzMKrgIKHWZveGdsb3ZlL01vZGVsUHJpbWl0aXZlLnByb3RvEghmb3hnbG92ZRoUZm94Z2xvdmUvQ29sb3IucHJvdG8aE2ZveGdsb3ZlL1Bvc2UucHJvdG8aFmZveGdsb3ZlL1ZlY3RvcjMucHJvdG8itwEKDk1vZGVsUHJpbWl0aXZlEhwKBHBvc2UYASABKAsyDi5mb3hnbG92ZS5Qb3NlEiAKBXNjYWxlGAIgASgLMhEuZm94Z2xvdmUuVmVjdG9yMxIeCgVjb2xvchgDIAEoCzIPLmZveGdsb3ZlLkNvbG9yEhYKDm92ZXJyaWRlX2NvbG9yGAQgASgIEgsKA3VybBgFIAEoCRISCgptZWRpYV90eXBlGAYgASgJEgwKBGRhdGEYByABKAxiBnByb3RvMwrnAQoeZm94Z2xvdmUvU3BoZXJlUHJpbWl0aXZlLnByb3RvEghmb3hnbG92ZRoUZm94Z2xvdmUvQ29sb3IucHJvdG8aE2ZveGdsb3ZlL1Bvc2UucHJvdG8aFmZveGdsb3ZlL1ZlY3RvcjMucHJvdG8icAoPU3BoZXJlUHJpbWl0aXZlEhwKBHBvc2UYASABKAsyDi5mb3hnbG92ZS5Qb3NlEh8KBHNpemUYAiABKAsyES5mb3hnbG92ZS5WZWN0b3IzEh4KBWNvbG9yGAMgASgLMg8uZm94Z2xvdmUuQ29sb3JiBnByb3RvMwr4AQocZm94Z2xvdmUvVGV4dFByaW1pdGl2ZS5wcm90bxIIZm94Z2xvdmUaFGZveGdsb3ZlL0NvbG9yLnByb3RvGhNmb3hnbG92ZS9Qb3NlLnByb3RvIpoBCg1UZXh0UHJpbWl0aXZlEhwKBHBvc2UYASABKAsyDi5mb3hnbG92ZS5Qb3NlEhEKCWJpbGxib2FyZBgCIAEoCBIRCglmb250X3NpemUYAyABKAESFwoPc2NhbGVfaW52YXJpYW50GAQgASgIEh4KBWNvbG9yGAUgASgLMg8uZm94Z2xvdmUuQ29sb3ISDAoEdGV4dBgGIAEoCWIGcHJvdG8zCqYCCiRmb3hnbG92ZS9UcmlhbmdsZUxpc3RQcmltaXRpdmUucHJvdG8SCGZveGdsb3ZlGhRmb3hnbG92ZS9Db2xvci5wcm90bxoVZm94Z2xvdmUvUG9pbnQzLnByb3RvGhNmb3hnbG92ZS9Qb3NlLnByb3RvIqkBChVUcmlhbmdsZUxpc3RQcmltaXRpdmUSHAoEcG9zZRgBIAEoCzIOLmZveGdsb3ZlLlBvc2USIAoGcG9pbnRzGAIgAygLMhAuZm94Z2xvdmUuUG9pbnQzEh4KBWNvbG9yGAMgASgLMg8uZm94Z2xvdmUuQ29sb3ISHwoGY29sb3JzGAQgAygLMg8uZm94Z2xvdmUuQ29sb3ISDwoHaW5kaWNlcxgFIAMoB2IGcHJvdG8zCusBCh5nb29nbGUvcHJvdG9idWYvZHVyYXRpb24ucHJvdG8SD2dvb2dsZS5wcm90b2J1ZiIqCghEdXJhdGlvbhIPCgdzZWNvbmRzGAEgASgDEg0KBW5hbm9zGAIgASgFQoMBChNjb20uZ29vZ2xlLnByb3RvYnVmQg1EdXJhdGlvblByb3RvUAFaMWdvb2dsZS5nb2xhbmcub3JnL3Byb3RvYnVmL3R5cGVzL2tub3duL2R1cmF0aW9ucGL4AQGiAgNHUEKqAh5Hb29nbGUuUHJvdG9idWYuV2VsbEtub3duVHlwZXNiBnByb3RvMwrvAQofZ29vZ2xlL3Byb3RvYnVmL3RpbWVzdGFtcC5wcm90bxIPZ29vZ2xlLnByb3RvYnVmIisKCVRpbWVzdGFtcBIPCgdzZWNvbmRzGAEgASgDEg0KBW5hbm9zGAIgASgFQoUBChNjb20uZ29vZ2xlLnByb3RvYnVmQg5UaW1lc3RhbXBQcm90b1ABWjJnb29nbGUuZ29sYW5nLm9yZy9wcm90b2J1Zi90eXBlcy9rbm93bi90aW1lc3RhbXBwYvgBAaICA0dQQqoCHkdvb2dsZS5Qcm90b2J1Zi5XZWxsS25vd25UeXBlc2IGcHJvdG8zCl0KFGZveGdsb3ZlL0NvbG9yLnByb3RvEghmb3hnbG92ZSIzCgVDb2xvchIJCgFyGAEgASgBEgkKAWcYAiABKAESCQoBYhgDIAEoARIJCgFhGAQgASgBYgZwcm90bzMKsgEKE2ZveGdsb3ZlL1Bvc2UucHJvdG8SCGZveGdsb3ZlGhlmb3hnbG92ZS9RdWF0ZXJuaW9uLnByb3RvGhZmb3hnbG92ZS9WZWN0b3IzLnByb3RvIlYKBFBvc2USIwoIcG9zaXRpb24YASABKAsyES5mb3hnbG92ZS5WZWN0b3IzEikKC29yaWVudGF0aW9uGAIgASgLMhQuZm94Z2xvdmUuUXVhdGVybmlvbmIGcHJvdG8zClYKFmZveGdsb3ZlL1ZlY3RvcjMucHJvdG8SCGZveGdsb3ZlIioKB1ZlY3RvcjMSCQoBeBgBIAEoARIJCgF5GAIgASgBEgkKAXoYAyABKAFiBnByb3RvMwpUChVmb3hnbG92ZS9Qb2ludDMucHJvdG8SCGZveGdsb3ZlIikKBlBvaW50MxIJCgF4GAEgASgBEgkKAXkYAiABKAESCQoBehgDIAEoAWIGcHJvdG8zCmcKGWZveGdsb3ZlL1F1YXRlcm5pb24ucHJvdG8SCGZveGdsb3ZlIjgKClF1YXRlcm5pb24SCQoBeBgBIAEoARIJCgF5GAIgASgBEgkKAXoYAyABKAESCQoBdxgEIAEoAWIGcHJvdG8z

No, the two examples you shared are not expected to be the same because they are using different schemas (ExampleMsg vs foxglove.SceneUpdate). However, this python example also uses SceneUpdate.

[jtbandes]

@windsice can you please try out this change and let me know if that fixes the problem? https://github.com/foxglove/ws-protocol/pull/279/files

[windsice]

Yes that fixed it, thank you.
One more question though, I don't see the same 3d view as what you shown above, is there instruction or settings to make it appear like yours?

[jtbandes]

You need to enable the topic manually. See: https://foxglove.dev/docs/studio/panels/3d#introduction