Lots of black strip and keep flashing when recording

[Dolan-Liu]

Whenever I attempt a recording, the screen flickers continuously, and numerous black stripes appear. If anyone has encountered a similar issue or has suggestions for a resolution, could you please share your insights here? Thanks!

[yucedagonurcan]

It can be due to bandwidth, loss of packages from network transport, do check out other issues and you can also try the lighter UDP profiles to check if it helps

[laurent82]

Hello
I'm also facing this problem on some computers (and no problem at all on others with same specs). The only hint I have is indeed it is dropping a lot of packets for some reasons.

This is my configuration, using Python and SDK 0.10.0 (I haven't tested yet with version 0.11.0)

        sensor_config.lidar_mode = client.LidarMode.MODE_1024x10
        sensor_config.udp_port_lidar = 7502
        sensor_config.udp_port_imu = 7503
        sensor_config.signal_multiplier = 1
        sensor_config.azimuth_window = (0, 360000)
        sensor_config.timestamp_mode = client.TimestampMode.TIME_FROM_SYNC_PULSE_IN
        sensor_config.multipurpose_io_mode = client.MultipurposeIOMode.MULTIPURPOSE_INPUT_NMEA_UART
        sensor_config.nmea_baud_rate = client.NMEABaudRate.BAUD_115200
        sensor_config.nmea_leap_seconds = 0
        sensor_config.phase_lock_enable = False
        sensor_config.sync_pulse_out_pulse_width = 10

Computers that have the problem are running on Windows 10 or 11. They do have a gigabit ethernet. I tried to play with the different settings of the network adapter (energy-saving mode or related) but I didn't find anything relevant. The problem also happens randomly.

Can you elaborate about the lighter UDP profiles?

[yucedagonurcan]

@laurent82 you can check out the following: https://static.ouster.dev/sensor-docs/image_route1/image_route3/sensor_data/sensor-data.html#id17

You can set it via launch file(if ROS): https://github.com/ouster-lidar/ouster-ros/blob/8dd5f73b9f16d30a4071b78a2327d3387fb142a8/launch/driver.launch#L8-L13

[matt-attack]

For Windows and Linux this thread has some instructions on mitigations:
https://community.ouster.com/t/increase-receive-buffer-to-eliminate-packet-drop-problem-on-some-windows-computers/84