如何在Python中使用MPP

[jadehh]

1.后续会提供mpp的python的Wheel吗? 2.mpp解码RTSP视频流和opencv解码RTSP视频流对CPU占用会有效降低吗?

[eyu11]

同问，咋没人回复？

[eyu11]

响应速度太慢了～～体验真心不好

[HouLingLXH]

同问， 怎么在python中使用啊！！

[zhaodaye2022]

同问，怎么在python中使用啊！！

[sztukai]

同问

[HermanChen]

目前不支持 python，需要做图像拷贝会影响效率

[sztukai]

可以接受python的mpp速度比C++的慢，再慢也不能比软解码慢吧。

[happyme531]

用apt装python3-opencv（不要用pip，把已经用pip装的卸掉），然后看下面代码：

import cv2
import os
import time

print(cv2.getBuildInformation())

filename = 'video.mp4'

# 软解
# cap = cv2.VideoCapture(filename)

# mpp硬解
os.environ["GST_VIDEO_CONVERT_USE_RGA"] = "1"
cap = cv2.VideoCapture(F"filesrc location={filename} ! qtdemux !  video/x-h264 ! h264parse ! mppvideodec arm-afbc=0 ! video/x-raw, format=NV12 ! videoconvert ! video/x-raw, format=BGR ! appsink sync=false")

frames = 0
cur = time.time()
while cap.isOpened():
    ret, frame = cap.read()
    if not ret:
        break
    frames += 1
    if frames % 100 == 0:
        print(f"fps: {100 / (time.time() - cur)}")
        cur = time.time()
    # cv2.imshow('frame', frame)
    # if cv2.waitKey(1) & 0xFF == ord('q'):
    #     break

rga_api version 1.9.2_[1]
[ WARN:0] global ../modules/videoio/src/cap_gstreamer.cpp (924) open OpenCV | GStreamer warning: unable to query duration of stream
[ WARN:0] global ../modules/videoio/src/cap_gstreamer.cpp (961) open OpenCV | GStreamer warning: Cannot query video position: status=1, value=0, duration=-1
fps: 503.11865374534733
fps: 535.0041327795749
fps: 531.8630596267337
fps: 541.6534082691076
fps: 532.7223262300371

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