LOW FPS on NANO using Opencv and Gstreamer

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Hi folks,
I use some python code to decode H264 Video on NVIDIA JETSON NANO I think everything works fine, but I see some times that I get this warning:

[ WARN:0] global /home/ubuntu/opencv/modules/videoio/src/cap_gstreamer.cpp (961) open 
OpenCV | GStreamer warning: Cannot query video position: status=1, value=253, duration=-1

I do not rely sure that this message is the problem but, When I think to get this warning I get the performance of 7~7.5FPS, sometimes I don’t get this warning, and my performance increase to 10.5FPS. I would be happy to understand the problem I play some pcap video using colasoft player and capture the video in jetson using this python script.

class Video:
def __init__(self, urlName='udp://127.0.0.1:46002'):
    print(f"Initialize Vieo, url: {urlName}")
    self.pipeline = 'udpsrc port=46002 multicast-group=234.0.0.0 ! h264parse ! nvv4l2decoder ! nvvidconv ! video/x-raw,format=BGRx ! videoconvert ! video/x-raw,format=BGR ! appsink drop=1'
    # self.cap = cv2.VideoCapture(urlName, cv2.CAP_FFMPEG)
    self.cap = cv2.VideoCapture(self.pipeline, cv2.CAP_GSTREAMER)
    if not self.cap.isOpened():
        print('VideoCapture not opened')
        exit(-1)

def readVideo(self):
    """
    This Function read h.264 stream and calculate image info
    :return: image, data_image
    """
    try:
        ret, frame = self.cap.read()
        while frame == None:
            ret, frame = self.cap.read()

    except Exception as e:
        pass

    shape = frame.shape
    data = {"image_width": shape[1], "image_height": shape[0], "channels": shape[2], "size_in_bytes": shape[0] * shape[1] * shape[2], "bits_per_pixel": shape[2] * 8}  # data Video

    return frame, data
3

Hi,
Please execute sudo nvpmodel -m 0 and sudo jetson_clocks. So that CPU cores run in max clock and it is maximum throughput. And please set max performance to nvv4l2decoder:

  enable-max-performance: Set to enable max performance
                        flags: readable, writable
                        Boolean. Default: false
4

Hi @DaneLLL ,
to enable max performance I need to update my pipeline?
for example :

self.pipeline = 'udpsrc port=46002 multicast-group=234.0.0.0 ! h264parse ! nvv4l2decoder **enable-max-performance=1** ! nvvidconv ! video/x-raw,format=BGRx ! videoconvert ! video/x-raw,format=BGR ! appsink drop=1'
5

Hi,
Yes. You can ensure the correct of the gstreamer command through gst-launch-1.0:

gst-launch-1.0 udpsrc port=46002 multicast-group=234.0.0.0 ! h264parse ! nvv4l2decoder enable-max-performance=1 ! nvvidconv ! video/x-raw,format=BGRx ! videoconvert ! video/x-raw,format=BGR ! fakesink

And apply to cv2.VideoCapture() by replacing fakesink with appsink

6

Ok, still I get the same result I don’t understand why?
When I look on current CPU load (I use MobaXterm SSH connection) I see 75% when the FPS is 7.5 but When I get 10.5 FPS I see 98% of CPU load.

7

Hi,
Please try this and check if frame rate is stable:

gst-launch-1.0 -v udpsrc port=46002 multicast-group=234.0.0.0 ! h264parse ! nvv4l2decoder enable-max-performance=1 ! nvvidconv ! video/x-raw,format=BGRx ! videoconvert ! video/x-raw,format=BGR ! fpsdisplaysink text-overlay=0 video-sink=fakesink sync=0

8

Hi,
The output that I get:

/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstFakeSink:fakesink0: sync = false
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 19, dropped: 0, current: 37.62, average: 37.62
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 31, dropped: 0, current: 21.54, average: 29.19
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 46, dropped: 0, current: 27.68, average: 28.68
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 60, dropped: 0, current: 26.47, average: 28.13
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 73, dropped: 0, current: 25.48, average: 27.62
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 86, dropped: 0, current: 24.07, average: 27.02
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 99, dropped: 0, current: 24.69, average: 26.69
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 112, dropped: 0, current: 24.71, average: 26.44
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 125, dropped: 0, current: 24.74, average: 26.25
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 139, dropped: 0, current: 25.86, average: 26.21
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 151, dropped: 0, current: 21.05, average: 25.71
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 165, dropped: 0, current: 27.34, average: 25.84
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 178, dropped: 0, current: 25.45, average: 25.81
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 191, dropped: 0, current: 25.36, average: 25.78
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 204, dropped: 0, current: 24.62, average: 25.70
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 217, dropped: 0, current: 24.61, average: 25.64
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 231, dropped: 0, current: 25.80, average: 25.65
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 243, dropped: 0, current: 22.70, average: 25.48
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 257, dropped: 0, current: 26.47, average: 25.53
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 270, dropped: 0, current: 24.62, average: 25.49
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 283, dropped: 0, current: 23.96, average: 25.41
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 296, dropped: 0, current: 25.30, average: 25.41
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 309, dropped: 0, current: 24.80, average: 25.38
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 322, dropped: 0, current: 25.29, average: 25.38
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 334, dropped: 0, current: 23.46, average: 25.30
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 348, dropped: 0, current: 26.50, average: 25.35
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 360, dropped: 0, current: 20.91, average: 25.17
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 375, dropped: 0, current: 28.46, average: 25.29
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 389, dropped: 0, current: 25.11, average: 25.28
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 402, dropped: 0, current: 25.45, average: 25.29
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 415, dropped: 0, current: 24.00, average: 25.25
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 428, dropped: 0, current: 24.66, average: 25.23
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 441, dropped: 0, current: 25.08, average: 25.22
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 453, dropped: 0, current: 22.87, average: 25.15
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 467, dropped: 0, current: 23.96, average: 25.12
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 479, dropped: 0, current: 22.27, average: 25.04
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 493, dropped: 0, current: 27.44, average: 25.10
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 505, dropped: 0, current: 23.86, average: 25.07
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 518, dropped: 0, current: 24.50, average: 25.05
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 531, dropped: 0, current: 25.88, average: 25.07
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 542, dropped: 0, current: 20.97, average: 24.97
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 557, dropped: 0, current: 28.55, average: 25.06
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 569, dropped: 0, current: 20.51, average: 24.94
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 584, dropped: 0, current: 28.67, average: 25.03
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 597, dropped: 0, current: 25.50, average: 25.04
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 610, dropped: 0, current: 24.80, average: 25.03
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 623, dropped: 0, current: 25.45, average: 25.04
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 635, dropped: 0, current: 23.83, average: 25.02
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 647, dropped: 0, current: 20.05, average: 24.90
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 654, dropped: 0, current: 12.57, average: 24.64
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 660, dropped: 0, current: 11.79, average: 24.40
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 667, dropped: 0, current: 12.64, average: 24.16
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 681, dropped: 0, current: 27.52, average: 24.23
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 694, dropped: 0, current: 24.14, average: 24.22
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 707, dropped: 0, current: 25.52, average: 24.25
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 719, dropped: 0, current: 23.57, average: 24.23
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 723, dropped: 0, current: 7.24, average: 23.92
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 730, dropped: 0, current: 12.25, average: 23.71
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 742, dropped: 0, current: 23.55, average: 23.71
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 757, dropped: 0, current: 27.85, average: 23.78
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 767, dropped: 0, current: 17.59, average: 23.67
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 775, dropped: 0, current: 14.85, average: 23.52
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 782, dropped: 0, current: 13.03, average: 23.35
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 787, dropped: 0, current: 8.07, average: 23.08
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 795, dropped: 0, current: 14.27, average: 22.93
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 804, dropped: 0, current: 17.18, average: 22.85
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 817, dropped: 0, current: 24.84, average: 22.88
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 830, dropped: 0, current: 24.15, average: 22.90
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 843, dropped: 0, current: 24.69, average: 22.92
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 853, dropped: 0, current: 17.76, average: 22.84
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 866, dropped: 0, current: 24.65, average: 22.87
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 874, dropped: 0, current: 15.70, average: 22.77
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 887, dropped: 0, current: 23.92, average: 22.79
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 898, dropped: 0, current: 19.36, average: 22.74
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 911, dropped: 0, current: 24.13, average: 22.76
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 924, dropped: 0, current: 24.79, average: 22.79
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 936, dropped: 0, current: 23.54, average: 22.80
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 949, dropped: 0, current: 25.73, average: 22.83
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 962, dropped: 0, current: 21.10, average: 22.81
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 976, dropped: 0, current: 27.55, average: 22.86
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 989, dropped: 0, current: 25.45, average: 22.89
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1001, dropped: 0, current: 23.53, average: 22.90
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1014, dropped: 0, current: 25.57, average: 22.93
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1022, dropped: 0, current: 14.83, average: 22.83
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1037, dropped: 0, current: 26.38, average: 22.88
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1049, dropped: 0, current: 23.58, average: 22.89
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1062, dropped: 0, current: 25.56, average: 22.91
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1075, dropped: 0, current: 25.56, average: 22.94
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1088, dropped: 0, current: 24.83, average: 22.96
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1101, dropped: 0, current: 25.53, average: 22.99
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1113, dropped: 0, current: 22.94, average: 22.99
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1126, dropped: 0, current: 25.55, average: 23.02
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1138, dropped: 0, current: 22.91, average: 23.02
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1153, dropped: 0, current: 27.77, average: 23.07
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1166, dropped: 0, current: 24.71, average: 23.09
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1179, dropped: 0, current: 25.46, average: 23.11
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1192, dropped: 0, current: 25.33, average: 23.13
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1204, dropped: 0, current: 22.12, average: 23.12
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1214, dropped: 0, current: 19.51, average: 23.09
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1225, dropped: 0, current: 20.88, average: 23.06
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1236, dropped: 0, current: 19.23, average: 23.02
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1248, dropped: 0, current: 22.12, average: 23.01
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1261, dropped: 0, current: 25.33, average: 23.04
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1272, dropped: 0, current: 21.40, average: 23.02
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1285, dropped: 0, current: 23.94, average: 23.03
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1297, dropped: 0, current: 22.76, average: 23.03
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1310, dropped: 0, current: 24.72, average: 23.04
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1323, dropped: 0, current: 24.61, average: 23.06
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1335, dropped: 0, current: 23.49, average: 23.06
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1348, dropped: 0, current: 24.74, average: 23.08
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1361, dropped: 0, current: 23.99, average: 23.08
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1374, dropped: 0, current: 25.28, average: 23.10
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1386, dropped: 0, current: 22.80, average: 23.10
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1398, dropped: 0, current: 22.72, average: 23.10
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1412, dropped: 0, current: 26.41, average: 23.13
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1424, dropped: 0, current: 22.70, average: 23.12
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1438, dropped: 0, current: 27.20, average: 23.16
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1450, dropped: 0, current: 22.70, average: 23.15
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1463, dropped: 0, current: 25.41, average: 23.17
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1475, dropped: 0, current: 23.46, average: 23.17
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1486, dropped: 0, current: 20.22, average: 23.15
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1499, dropped: 0, current: 24.59, average: 23.16
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1512, dropped: 0, current: 25.35, average: 23.18
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 1525, dropped: 0, current: 25.28, average: 23.19
9

Hi,
It looks like the source is not stable and may drop to 7 fps in certain condition. What is the resolution of the source? If it is 4K the performance can be capped by CPU capability.

And you can execute sudo tegrastats to get system status.

10

Hi’
the system status:


RAM 2498/3964MB (lfb 35x4MB) SWAP 35/6078MB (cached 0MB) IRAM 0/252kB(lfb 252kB) CPU [6%@1479,5%@1479,7%@1479,3%@1479] EMC_FREQ 1%@1600 GR3D_FREQ 0%@921 APE 25 PLL@33C CPU@35C PMIC@100C GPU@34C AO@41C thermal@34.25C POM_5V_IN 2245/2319 POM_5V_GPU 163/199 POM_5V_CPU 489/506

about the resolution of the source is :

720x576

like I said I play the pcap file and send UDP packets then decode the video with NVVDecoder.

11

Hi,
Jetson Nano should be good for decoding 720x576. It is very likely the source doesn’t have stable frame rate. Or OpenCV processing caps the performance. You may try video file source as comparison.

12

I don’t understand why sometimes it’s work fine (FPS=10) with the same PCAP file?

13

Hi,
You can run gst-launch-1.0 command to set up UDP server for comparison:

gst-launch-1.0 videotestsrc is-live=1 ! video/x-raw,width=1280,height=720 ! timeoverlay valignment=4 halignment=1 ! nvvidconv ! ‘video/x-raw(memory:NVMM),width=1280,height=720’ ! nvv4l2h264enc insert-sps-pps=1 idrinterval=15 ! h264parse ! rtph264pay ! udpsink host=HOST_IP_ADDRESS port=5000 sync=0

15

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