Nvv4l2decoder failure

Accelerated Computing Intelligent Video Analytics DeepStream SDK
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1

• Hardware Platform (Jetson / GPU) ORIN
• DeepStream Version 7.1
• JetPack Version (valid for Jetson only) 6.2
• TensorRT Version 10.3.0.30
• NVIDIA GPU Driver Version (valid for GPU only)

When using capture-main.py for RTSP stream retrieval:

  • Successful stream capture occurs when using avdec_h264 decoder
  • Failure occurs when using nvv4l2decoder

capture-main.py is shown below

import cv2
import time
def capture():

    # 启动拉流
    url = "rtsp://192.168.137.1:554/1"
    gst_str = (
        'rtspsrc location={} latency=200 protocols=4 '
        '! rtph264depay '
        '! h264parse '
        '! nvv4l2decoder enable-max-performance=1 '
        '! nvvidconv output-buffers=2 '
        '! video/x-raw, format=BGRx '
        '! videoconvert '
        '! video/x-raw, format=BGR '
        '! appsink drop=true sync=false max-buffers=10'
    ).format(url)
    #gst_str = (
    #    'rtspsrc location={} latency=200 protocols=4 '
    #    '! rtph264depay '
    #    '! h264parse '
    #    '! avdec_h264 '
    #    '! nvvidconv output-buffers=2 '
    #    '! video/x-raw, format=BGRx '
    #    '! videoconvert '
    #    '! video/x-raw, format=BGR '
    #    '! appsink drop=true sync=false max-buffers=10'
    #).format(url)
    
    cap = None
    frame_num = 0


    while True:
        
        print("before VideoCapture")
        #cap = cv2.VideoCapture(url) #OK
        cap = cv2.VideoCapture(gst_str, cv2.CAP_GSTREAMER)
        print("after VideoCapture")
        flag = True if cap.isOpened() else False
        # ret, img = cap.read()
        if flag:
            print('VideoCapture success')

        else:
            print('VideoCapture failed')
            cap.release()
            time.sleep(0.1)
            continue
        while(flag):
            flag, img = cap.read()
            # logger.debug("Pantographs structure analysis, time %f" % (time.time() - time_start1))
            # 执行分析
            if img is None:
                print('>>> Image data is None , drop it !')
                time.sleep(0.001)
                continue
            print("cap.read")
            frame_num += 1
            #analysis(frame_num, img) # 输入帧号和图片信息
            if frame_num ==2000:
                return
        cap.release()
        
if __name__ == '__main__':

    capture()

using avdec_h264

image
image1069×273 19.4 KB

using nvv4l2decoder

image
image1069×379 34 KB

please help me solve this problem，thank you

2

We don’t have DeepStream 7.2 version.

3

sorry, it is version 7.1

5

Your python script works well in my Orin NX board. The only difference is that the JetPack version is 6.1

6

**There is no update from you for a period, assuming this is not an issue anymore. Hence we are closing this topic. If need further support, please open a new one. Thanks**