using a.bag frames

[arothenberg]

---

Required Info
Camera Model	D435
Firmware Version	05.12.02.100
Operating System & Version	Win (10)
Platform	PC
SDK Version	2.32
Language	C++
Segment	desktop app

Issue Description

I am trying to analyze depth frames on prerecorded data.

To test it I'm using the rs-align-advanced code and changing the source to the "a.bag" file created using rs-record-playback .
I tried to port this code:
cfg.enable_device_from_file("a.bag");

into rs-align-advanced like this

rs2::pipeline pipe;
rs2::config cfg;
cfg.enable_device_from_file("a.bag");
rs2::pipeline_profile profile = pipe.start(cfg);

get an error saying failed to create a ros reader.

The difference i see is that rs-record-playback uses a shared pointer

pipe = std::make_sharedrs2::pipeline();
...
pipe->start(cfg);

I'm probably missing something obvious.

Thanks in advance. Also, is the bag file degraded or does it store the same frames that the camera sends?

[kograins]

To arothenberg:

I am using python API, The method "config.enable_stream_from_file("filename")" didn't worked well with the loaded .bag filename named with prefix like "test....", "2020....".

Try another file name with prefix like "sun...".

[MartyG-RealSense]

Hi @arothenberg If you are working in the C++ language, the RealSense ROS-bag parser sample program created by a RealSense community member may be a useful reference. It also requires OpenCV as a dependency though.

The finished code for the project is at the bottom of the opening comment, in a file called RealSenseHelper.zip.

#2215

[arothenberg]

Thanks Marty.
I downloaded the zip and will see what it's all about. I didn't want to add the dependency but I guess Opencv is necessary for certain tasks.

Thanks. I'll open another issue or comment on the marcovs thread if(when!) I have a problem. Thanks.

[MartyG-RealSense]

@arothenberg Thanks very much for the update. Good luck!

[arothenberg]

Thanks. One other thing. Realsense should consider adding the parser or similar to the sdk examples because testing with prerecorded data is necessary for most projects.

[MartyG-RealSense]

The rosbag parser program is at the base of the SDK examples page, filed under the Community Projects section of example programs contributed by RealSense community members.

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

[arothenberg]

I got it thanks. I'll set it up today. I never thought of checking the community projects. I'll be more aware of that now. It probably makes things easier.