topic Re: How to record video from D435 cameras in Items with no label

How to record video from D435 cameras

JMage — Sat, 10 Feb 2018 09:51:09 GMT

Hi everyone,

I'm new to both the D435 and RealSense SDK 2.0. I want to modify the rs-multicam c++ sample to synchronously record videos from each connected RGB camera, and to save the videos to a path.

I'm not sure where to begin, and I would really appreciate your help.

Thank you,

jmagen

Re: How to record video from D435 cameras

MartyG — Sat, 10 Feb 2018 10:55:19 GMT

Welcome to the RealSense community!

The options for recording with a D435 currently include:

1. Recording data into a file called a 'rosbag.

https://github.com/IntelRealSense/librealsense/blob/master/src/media/readme.md librealsense/readme.md at master · IntelRealSense/librealsense · GitHub

If you are new to recording, you may like to first experiment with recording and playing back data in the pre-made RealSense Viewer tool that comes with the SDK 2.0, as described in the above link.

A short YouTube video explaining the rosbag process is also available.

https://www.youtube.com/watch?time_continue=2&v=pwlbArh_neU rosbag - YouTube

2. The other option is to record the RealSense data into a PNG image with the SDK's 'Save-To-Disk' sampl eprogram. You could then convert the PNG into a conventional video. Google 'convert png to video' for more details.

https://github.com/IntelRealSense/librealsense/tree/master/examples/save-to-disk librealsense/examples/save-to-disk at master · IntelRealSense/librealsense · GitHub

Re: How to record video from D435 cameras

JMage — Sun, 11 Feb 2018 13:33:51 GMT

Thanks for the quick reply, MartyG.

I very much like the playback of rosbag files within the RealSense viewer, so I would like to replicate that. I'm trying to add some recorders into the multicam sample, but I'm having a hard time creating a recorder for a stream.

Immediately after multicam's query for the list of connected RealSense devices, I inserted a query for all sensors in the context--with the hope that I could find the color streams and create a recorder for each of them.

Here is my code snippet:

for (auto&& sen : ctx.query_all_sensors()) { // Query the list of sensors

for (auto&& prof : sen.get_stream_profiles()) { // Query the list of stream profiles from sen

if (prof.stream_type() == RS2_STREAM_COLOR) {

rs2::recorder rec("stream_name.bag", sen); //This does not work

connected_devices.enable_device(rec);

}

How should I go about creating a recorder for streams?

Thanks again,

jmagen

Re: How to record video from D435 cameras

MartyG — Sun, 11 Feb 2018 14:53:50 GMT

The first thing I would try is to change rs2::recorder rec to rs2::recorder device

The rationale behind this is that rs2::recorder device, followed by an instruction such as 'pause or 'filename'', seems to be the commonly occurring structure for rs2::recorder commands.

Re: How to record video from D435 cameras

MPint4 — Fri, 02 Mar 2018 13:06:07 GMT

Hi jmagen,

Did you solve this problem?

I'm having the same issue and haven't figured it out how to record synchronously from two devices.

Thanks,

Re: How to record video from D435 cameras

idata — Sat, 03 Mar 2018 00:55:23 GMT

Hello mariopintopleroma,

Have you tried changing the lines MartyG suggested?

Best regards,

Josh B.

Intel Customer Support