ROS bag playback - Warning: "Very large block found"

When replaying a ros bag, the following warning appears:

Very large block found

A very large block (1202ms) was found: 112MB. Too much data can cause performance problems and even crashes. Please fix this where the data is being generated.

• Version: 1.0.0
• OS: Ubuntu 20.04

Though this seems to be related to the data source, the warning message in foxglove studio does not help to narrow down the problem. What does “very large block” mean? The playback in rviz works fine. With foxglove, the playback gets stuck frequently for the same bags.

Splitting up the rosbags did not change the behavior.

Suggestion: Add verbose information about what is causing this, and how it might be fixed would be helpful in the warning message.

[rogue-shadowdancer]

@lanyusea could please ask Power to find one here? I think some bag with fisheye pictures or grid maps may be suitable.

[defunctzombie]

For anyone experiencing this issue - please give the new Experimental Bag Player a try. It is not yet in a desktop release but available on web.

The setting is in the app settings.