Camera returning black screen

[singlakdeepak]

Hi, I installed the tiscamera library on my Linux PC with Ubuntu 20.04 and using the basic command gst-launch-1.0 tcambin ! videoconvert ! ximagesink to run the camera. However, my camera is returning a black screen with the following message in the background gst-launch-1.0 tcambin ! videoconvert ! ximagesink Setting pipeline to PAUSED ... Pipeline is live and does not need PREROLL ... INFO: Working with src caps: video/x-raw, framerate=(fraction)539/1, width=(int)720, height=(int)540, format=(string)GRAY8 Setting pipeline to PLAYING ... New clock: GstSystemClock ERROR: from element /GstPipeline:pipeline0/GstXImageSink:ximagesink0: Output window was closed Additional debug info: ximagesink.c(696): gst_x_image_sink_handle_xevents (): /GstPipeline:pipeline0/GstXImageSink:ximagesink0 Execution ended after 0:00:05.060191483 Setting pipeline to PAUSED ... Setting pipeline to READY ... Setting pipeline to NULL ... Freeing pipeline ... The camera mode is DMK 37AUX287. I also installed IC Measure from https://www.theimagingsource.com/support/downloads-for-linux/ and my camera is displaying frames in this application. I also tried to use the camera on Windows PC with its windows software and it works fine there with any frame rate.

It would be great if someone can let me know some workarounds for the problem since I would like to use the camera from Python for my project. Thank you!

-- Deepak

[TIS-Stefan]

I would start with lower frame rates in the GStreamer pipeline.

gst-launch-1.0 tcambin ! video/x-raw, format=BGRx, width=720, height=540, framerate=30/1 ! videoconvert ! ximagesink

If that works, you may use "300/1" instead of "30/1". You can try up to "539/1" until your computer can not handle the high frame rate anymore.

Stefan

[singlakdeepak]

Hi Stefan,

Thank you for your reply. I tried the following command on my PC. So the following happens: As soon as I plugged in the camera, and ran the command, it displayed me some frames when I moved the camera, however within 10 seconds the frame update stopped and it kept on displaying the last frame captured. After canceling this and running the command again, it started displaying the black screen again. To be fair, it seems IC-Measure is a bit buggy too on my PC and it keeps on crashing sometimes when I try to open my device there. Any help would be greatly appreciated. Thanks!

Deepak

[TIS-Stefan]

Hello

Is the USB connector plugged well into the camera? Which computer model and brand do you use? In particular, which USB controller chip do you use? If it is AMD/ASMEDIA, then you must expected issues.

Stefan

[singlakdeepak]

Hi Stefan, Yes, the USB connector is well plugged in. Here are some of the details of the processors in PC:

vendor_id : AuthenticAMD cpu family : 25 model : 33 model name : AMD Ryzen 9 5900X 12-Core Processor x24

It also has a graphics card by NVIDIA. I bought the PC from iBuyPower. To check the USB controller chip, I used sudo lspci|grep -i usb and it returned me this:

02:00.0 USB controller: Advanced Micro Devices, Inc. [AMD] Device 43ee 2d:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Matisse USB 3.0 Host Controller

It seems from here, it is AMD. By the way, it seems I was connecting the camera on the front 3.0 ports earlier and it showed black screen but on the port at the back, it is showing live stream well. However, I am not able to understand why it didn't work on the front port since other devices work well on the front ports. Thanks for your help.

Deepak

[TIS-Stefan]

The front port USB wires to main board are sometimes badly shielded. If so, the power supply, hard disc and other emitters send into the wires and then the USB physical layer is disturbed.

On Windows we have trouble using the AMD USB 3 controllers. I worst case we get Blue Screens.

Stefan

[TIS-Edgar]

Closed due to inactivity.