3399proD解码速度缓慢问题

[复制链接] · 发表于 2023-4-14 16:11:58

3399proD上，使用如下py代码，接入网络摄像头，并尝试转成rtsp流推送出去，发现解码过程耗时较高，想请问下，原因出在哪里？

import cv2

import time

import gi

gi.require_version('Gst', '1.0')

gi.require_version('GstRtspServer', '1.0')

from gi.repository import GObject, Gst, GstRtspServer



uri = "rtsp://admin:a1234567@192.168.49.94/h264/ch1/main/av_stream"

t0 =  time.time()

gst_str = ('rtspsrc location={} latency=0 ! '

           'rtph264depay ! h264parse ! mppvideodec ! '

           'videoconvert ! video/x-raw,format=BGR,formaterate=25/1 ! appsink sync=false').format(uri)

cap = cv2.VideoCapture(gst_str, cv2.CAP_GSTREAMER)



t = time.time()

print('VideoCapture cost', t - t0)

print('cap isOpened', cap.isOpened())

width = 1920

height = 1080

out_send = cv2.VideoWriter('appsrc ! video/x-raw, format=BGR ! queue ! videoconvert ! video/x-raw,width={},height={} ! queue ! mpph264enc ! queue ! video/x-h264, stream-format=byte-stream ! h264parse ! rtph264pay pt=96 config-interval=1 ! udpsink host=127.0.0.1 port=5400'.format(width, height), cv2.CAP_GSTREAMER, 0, 25, (width, height), True)

print('out_send', out_send.isOpened())

rtsp_port_num = 8554

server = GstRtspServer.RTSPServer.new()

server.props.service = "%d" % rtsp_port_num



server.attach(None)

factory = GstRtspServer.RTSPMediaFactory.new()

factory.set_launch("(udpsrc name=pay0 port=5400 \

                                        caps="application/x-rtp, media=video, clock-rate=90000, \

                                        encoding-name=(string)H264, payload=96 ")")

factory.set_shared(True)

server.get_mount_points().add_factory("/test", factory)



num = 0

start = time.perf_counter()

while True:        

        t1 = time.time()

        ret, frame = cap.read()

        t2 = time.time()

        print('time cost', round(t2 - t1, 4))

        if not ret:

                break

        t3 = time.time()# 

        out_send.write(frame)

        t4 = time.time()

        if cv2.waitKey(1) & 0xFF == ord("q"):

                cap.release()

                out_send.release()

                break

        num +=1
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测试发现，在cap.read()出的耗时，达到170ms+，这个是什么原因呢？？

然后我也用dmesg命令查看后台日志，发现如下问题：

[  600.365372] rk_vcodec: vpu_service_ioctl:2140: error: unknown vpu service ioctl cmd 40086c01

[  605.194149] Core dump to |/usr/lib/systemd/systemd-coredump 3732 1000 1000 11 1681456866 18446744073709551615 debian10.toybrick mpp_dec_parser pipe failed

[ 3189.955584] rk_vcodec: vpu_service_ioctl:2140: error: unknown vpu service ioctl cmd 40086c01

[ 3189.960992] Core dump to |/usr/lib/systemd/systemd-coredump 21788 1000 1000 11 1681459451 18446744073709551615 debian10.toybrick mpp_dec_parser pipe failed

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只看该作者 · 发表于 2023-4-19 18:21:26

mppvideodec 这个库转码安装的