single_depth_color_640x480.bag violates ROSBag file format specification

[MarekKnapek]

Hi, I'm in process of writing a ROSBag file format parser and I found single_depth_color_640x480.bag file in your repository, I'm using it as a unit test for my parser.

I would like to inform you, that this file violates ROSBag file format specification.

If you look at Bags/Format/2.0 - ROS Wiki page, paragraph Connection, you will see, that connection record must have specific body. In particular, the connection record body must contain a connection header. Connection header consists of mandatory and optional fields. Mandatory fields are topic, type, md5sum and message_definition.

Sadly, the file in your repository is missing the topic field and thus it is invalid ROSBag file.

[MartyG-RealSense]

Hi @MarekKnapek The bag format used by the RealSense SDK is mostly based on the rosbag format but not every rosbag may be able to be played back in the SDK. Some have also found that an SDK-recorded bag will not play in the ROS bag playback. Advice about this is provided in the links below.

Rosbag playback in SDK
#3020 (comment)

SDK bag playback in ROS
#4260

In regard to a rosbag parser, there is an existing one listed in the Community Projects section of user-contributed projects at the bottom of the SDK Examples page.

#2215

The full list of Community Projects can be found here:

https://github.com/IntelRealSense/librealsense/tree/master/examples#community-projects

[MartyG-RealSense]

Hi @MarekKnapek Do you require further assistance with this case, please? Thanks!

[MarekKnapek]

Hi @MartyG-RealSense, I don't need any assistance with this.

You should be sad, that file in your repository is not readable by standard ROSBag tools, but apparently, you are not.

Feel free to close this issue with something like won't-fix / as-designed / not-a-bug resolution tag.

Marek

[MartyG-RealSense]

I am sorry that you are disappointed in the design decision to focus on camera-only data. #3020 (comment)