Question

所以我现在要完成的工作是从树莓派相机获取h264流以在Windows Media Player中播放。我从PiCamera Documentation

获得了代码

import socket
import subprocess

# Start a socket listening for connections on 0.0.0.0:8000 (0.0.0.0 means
# all interfaces)
server_socket = socket.socket()
server_socket.bind(('0.0.0.0', 12345))
server_socket.listen(0)

# Accept a single connection and make a file-like object out of it
connection = server_socket.accept()[0].makefile('rb')
try:
    # Run a viewer with an appropriate command line. Uncomment the mplayer
    # version if you would prefer to use mplayer instead of VLC
    #cmdline = ['vlc', '--demux', 'h264', '-']
    cmdline = ['C:\Program Files\Windows Media  Player\wmplayer', '-fps', '25', '-cache', '1024', '-']
    player = subprocess.Popen(cmdline, stdin=subprocess.PIPE)
    while True:
    # Repeatedly read 1k of data from the connection and write it to
        # the media player's stdin
        data = connection.read(1024)
        if not data:
            break
        player.stdin.write(data)
finally:
    connection.close()
    server_socket.close()

我得到的错误在这里

line 24, in <module>
    player.stdin.write(data)
OSError: [Errno 22] Invalid argument

我正在运行32位Windows 10。 server.py文件位于我桌面上的文件夹中，我尝试将其移至python文件夹时没有运气。我知道流通过是因为我可以在while循环中调用print(data)，它开始打印掉所有字节码。我不确定从哪里开始此错误。我的第二个问题是，是否可以使用ffmpeg-python或cv2之类的东西来处理以帧为单位的字节？因此，可以在GUI画布中使用它。

使用subprosses.POpen（）获得OSError

0 个答案: