I am trying to record videos from a connected camera. I am trying to use a python script but alternative method is fine if someone has a suggestion. With script, which works on other PCs does not work on the Xavier. I get an output video of only a few Mbs and the video is only the first frame. I hav…

You may try: gst_out = "appsrc ! queue ! videoconvert ! video/x-raw,format=BGRx ! nvvidconv ! nvv4l2h264enc ! video/x-h264,format=byte-stream ! h264parse ! matroskamux ! filesink location=test-nvh264-writer.mkv " out = cv2.VideoWriter(gst_out, cv2.CAP_GSTREAMER, 0, float(cap.get(cv2.CAP_PROP_FPS)),…

Ok I tried switching it to follow that example but I simply get failed to open output. This is a CSI camera running 1920x1080 30fps YUV. The camera runs and displays fine with the code but I cannot get video to record. Updated code with attempt to use GST attached. recordVideo.py (793 Bytes)

This still does not work. As is I get an error V4L: unable to get FPS Failed to open output. Manually setting the FPS to 30 I just get failed to open output. With my code the camera opens and streams but the recorded files are extremely small and only show one frame. This is using a leopard GMSL ca…

If you are still using it, try commenting imshow call. It is not efficient on Jetson and may slow down. If you can post the ouput of: v4l2-ctl -d0 --list-formats-ext (v4l2-ctl command is provided by apt package v4l-utills), it may be possible to debug this further.

This is the ouput of that command: ioctl: VIDIOC_ENUM_FMT Index : 0 Type : Video Capture Pixel Format: ‘YUYV’ Name : YUYV 4:2:2 Size: Discrete 1920x1080 Interval: Discrete 0.033s (30.000 fps) Index : 1 Type : Video Capture Pixel Format: 'YUYV' Name : Y…

Ok, so first try to display your camera in gstreamer: # The following expects a X display gst-launch-1.0 -v v4l2src device=/dev/video0 ! video/x-raw,format=YUY2,width=1920,height=1080,framerate=30/1 ! xvimagesink # If not running X but having a monitor able to diplay this mode connected to Jeston:…

[image] Honey_Patouceul: If it works, you may try to record H264 encoded video into matroskamux container file with: first command works no issues, video streams and is running at 30fps. Second command I never see stream, hangs with this as the output: Setting pipeline to PAUSED … Openi…

You may have to issue a second termination signal (first try one or two seconds later) when using EOS with -e. Is the saved file ok ? Note that Ubuntu totem may not work correctly with Jetsons, so better read your file from gstreamer on Jetson, or upload to an host for checking.

opening the file on a different PC works! What do you mean by second termination signal? How am I supposed to be terminating the recording from the terminal command? If I try to move on to your third suggestion of switching cap to gstreamer backend as you wrote what do I need for my gst_out and ou…

Glad to see it worked out. The second term signal may not be be relevant for your case (it is sometimes required for terminating a pipeline with EOS and nvarguscamerasrc). You would just change the VideoCapture from V4L VideoCapture(0) to the gstreamer pipeline capture. Then I would expect the fra…

Recording video from camera

Robotics & Edge Computing Jetson Systems Jetson AGX Xavier

DaneLLL May 19, 2021, 1:03am 3

Hi,
On Jetson platforms, generally we run gstreamer pipelines in cv2.VideoCapture() and cv2.VideoWriter(). Please refer to this sample:
Displaying to the screen with OpenCV and GStreamer - #9 by DaneLLL

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Recording video from camera

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