I want to use Jetson nano as a NVR server with 4 IP cam, but it seems Jetson nano can not afford NVR usage, I tried to find solution for a month, but I did not find a best solution.
Firstly, I try to use ZoneMinder NVR software, but when I open three rtsp IP cam to record, CPU will stuck on 100%, and I can not open another IP cam, even I need to remove power cable to shutdown Jetson nano.
And I realize that ZoneMinder use ffmpeg as a codec, but ffmpeg HW accelerate is not support Jetson GPU, since Jetson NVENC/NVDEC block is not on GPU. ref
Then I find an repo jetson-ffmpeg, it can use h264_nvmpi to enable Jetson NVENC/NVDEC for ffmpeg, I use its example and it did work, but I can not use it on ZoneMinder(I try to add vcodec=h264_nvmpi but ZoneMinder said that it can not recognize this codec, also try to modify ffmpeg path to repo install path, still not working).
Now I give up ZoneMinder and try to use gstreamer + opencv + flask on Python to establish NVR site, here is my code of how to use gstreamer + opencv:
def record(id): return "gst-launch-1.0 rtspsrc location=rtsp://admin:admin@ip:554/media ! rtph264depay ! queue ! h264parse ! matroskamux ! filesink location=/home/user/record/CAM"+ str(id) + "_"+ time.strftime("%Y%m%d_%H%M%S") +".mp4" def find_camera(id): return 'rtspsrc location=rtsp://admin:admin@ip:554/media ! rtph264depay ! h264parse ! omxh264dec ! nvvidconv ! video/x-raw, width=640, height=360, format=BGRx ! videoconvert ! appsink ' def gen_frames(camera_id): cam = find_camera(camera_id) cap= cv2.VideoCapture(cam, cv2.CAP_GSTREAMER) while True: # for cap in caps: # # Capture frame-by-frame success, frame = cap.read() # read the camera frame if not success: break else: ret, buffer = cv2.imencode('.jpg', frame) frame = buffer.tobytes() yield (b'--frame\r\n' b'Content-Type: image/jpeg\r\n\r\n' + frame + b'\r\n')
And NVDEC is used, CPU usage is about 90%, at the beginning 4 IP cam on the site run OK, but after a few seconds, one/two of the IP cams image will freezing.
I want to know:
- Is my gstreamer pipeline have any defect need to improve?
- Is there a better solution for the NVR server on Jetson Nano?