使用python vlc play_buffer示例

编程问答 2022-08-15

问题描述

我要运行的代码是：

link

运行此命令时的输出：

python play_buffer.py C:\Users\Acer\Desktop\SKAI_podcast\1821\

是

[000001aa61bb89f0] imem demux error: Invalid get/releaspress enter to quite function pointers
[000001aa61bb7620] imem stream error: Invalid get/release function pointers
OPEN 1831289042448 <vlc.LP_c_void_p object at 0x000001AA6195CBC8> <vlc.LP_c_ulonglong object at 0x000001AA6195CC48>
read file list
playlist:
READ 1831289042448 <ctypes.LP_c_char object at 0x000001AA6195CBC8> 16777216
reading file [0] file list is over
just read f0B
[000001aa61bb8c90] mjpeg demux error: cannot peek
CLOSE 1831289042448
releasing stream provider
[000001aa61baf040] main input error: ╬Ω ╬╡╬ψ╧Δ╬┐╬┤╧Ν╧Γ ╧Δ╬▒╧Γ ╬┤╬╡╬╜ ╬╝╧Α╬┐╧Β╬╡╬ψ ╬╜╬▒ ╬▒╬╜╬┐╬╣╧Θ╧Ε╬╡╬ψ
[000001aa61baf040] main input error: O VLC ╬┤╬╡╬╜ ╬╡╬ψ╬╜╬▒╬╣ ╬┤╧Ζ╬╜╬▒╧Ε╧Ν╬╜ ╬╜╬▒ ╬▒╬╜╬┐╬ψ╬╛╬╡╬╣ ╧Ε╬┐ MRL 'imem://'. ╬Χ╬╗╬φ╬│╬╛╧Ε╬╡ ╧Ε╬┐ ╬║╬▒╧Ε╬▒╬│╧Β╬▒╧Η╬┐╬╗╧Ν╬│╬╣╬┐ ╬│╬╣╬▒ ╬╗╬╡╧Α╧Ε╬┐╬╝╬φ╧Β╬╡╬╣╬╡╧Γ.

我打开了一个github问题： https://github.com/oaubert/python-vlc/issues/150

我该怎么做才能解决问题？

解决方法

import ctypes
import io
import sys
import time

import vlc

MediaOpenCb = ctypes.CFUNCTYPE(ctypes.c_int,ctypes.c_void_p,ctypes.POINTER(ctypes.c_void_p),ctypes.POINTER(ctypes.c_uint64))
MediaReadCb = ctypes.CFUNCTYPE(ctypes.c_ssize_t,ctypes.POINTER(ctypes.c_char),ctypes.c_size_t)
MediaSeekCb = ctypes.CFUNCTYPE(ctypes.c_int,ctypes.c_uint64)
MediaCloseCb = ctypes.CFUNCTYPE(ctypes.c_void_p,ctypes.c_void_p)


def media_open_cb(opaque,data_pointer,size_pointer):
    data_pointer.contents.value = opaque
    size_pointer.contents.value = sys.maxsize
    return 0


def media_read_cb(opaque,buffer,length):
    stream=ctypes.cast(opaque,ctypes.POINTER(ctypes.py_object)).contents.value
    new_data = stream.read(length)
    for i in range(len(new_data)):
        buffer[i]=new_data[i]
    return len(new_data)


def media_seek_cb(opaque,offset):
    stream=ctypes.cast(opaque,ctypes.POINTER(ctypes.py_object)).contents.value
    stream.seek(offset)
    return 0


def media_close_cb(opaque):
    stream=ctypes.cast(opaque,ctypes.POINTER(ctypes.py_object)).contents.value
    stream.close()


callbacks = {
    'open': MediaOpenCb(media_open_cb),'read': MediaReadCb(media_read_cb),'seek': MediaSeekCb(media_seek_cb),'close': MediaCloseCb(media_close_cb)
}

def main(path):
    stream = open(path,'rb')
    instance = vlc.Instance()
    player = instance.media_player_new()
    media = instance.media_new_callbacks(callbacks['open'],callbacks['read'],callbacks['seek'],callbacks['close'],ctypes.cast(ctypes.pointer(ctypes.py_object(stream)),ctypes.c_void_p))
    player.set_media(media)
    player.play()

    while True:
        time.sleep(1)

if __name__ == '__main__':
    try:
        path = sys.argv[1]
    except IndexError:
        print('Usage: {0} <path>'.format(__file__))
        sys.exit(1)

    main(path)

我不知道上面的代码为什么起作用（也许是ctypes问题），但是我在stackoverflow link

的答案中找到了代码
pythonvlcwindowswindows