Capturing frames without frame drops

[a-m-p-m]

Hello,

I hope this is an appropriate place for the following question:

Given that there is a substantial level of frame drops in RealSense Viewer at high fps (e.g., 90 fps for 848x480 frame size: #7488), did anyone had a success capturing and saving frames from the camera (e.g., D435) using there own piece of software without frame drops for 848x480 @ 90 fps setting?

Thanks.

[MartyG-RealSense]

Hi @a-m-p-m If you are saving the frames to disk in real-time as they are captured then there is the possibility of bottlenecks occurring with the computer hardware, such as a storage device with slow access speeds (e.g a non-SSD hard drive).

The file format that you are saving in may have a bearing on speed of writing. Bag files are the most efficient recording format in the RealSense SDK, whilst writing frames to other formats such as ply and csv may be considerably slower.

Also, are you using the official 1 meter cable supplied with the camera please? If you use your own cable, the choice of cable can have a bearing on data transfer due to varying quality of third-party USB cables. The company Newnex can provide industrial-grade USB equipment.

https://www.newnex.com/realsense-3d-camera-connectivity.php

If you are recording for a short period (e.g up to 30 seconds) then an SDK function called Keep() may suit you. It records frames to the computer's memory instead of writing them to file. When the pipeline is closed, you can do batch-processing on the frames such as align and post-processing and then save the data to file. The technique consumes computer memory capacity though, which is why it is best suited to short recording durations.

[MartyG-RealSense]

Hi @a-m-p-m Do you still require assistance with this case, please? Thanks!

[MartyG-RealSense]

Case closed due to no futher comments received.