Using Node JS Package with ROS2 data and CDR compression?

[gkjohnson]

Hello! I'm working from the validate.ts example referenced in #585 and am trying to load a ROS bag data from my team but I'm getting the following error:

Error: unsupported encoding cdr

I see that the decompressHandlers function only provides handlers for zstd, lz4, and bzip. Are there packages, examples, or recommendations available for handling CDR compression?

[jtbandes]

Hey, sorry for the slow response here, this fell off my radar. CDR is a message encoding, not a type of compression. For specifically decoding ROS 2 messages we use https://github.com/foxglove/rosmsg2-serialization which is based on https://github.com/foxglove/cdr. Example here: https://github.com/foxglove/studio/blob/56620d28a684503a50f6c793b41b11e968b08254/packages/mcap-support/src/parseChannel.ts#L174

[jtbandes]

Fixing the validate example in #1186

[gkjohnson]

Excellent - thank you!