Question

我想用gst创建一个播放音乐的播放器类。这是代码：

from gi.repository import GObject
GObject.threads_init()
import gst

class PlayerControl:
    def __init__(self, main_window):

        self.player = gst.element_factory_make("playbin2", "player")
        self.sink = gst.element_factory_make("autoaudiosink", "player Output")
        self.videosink= gst.element_factory_make("fakesink", "player fake Output")
        self.player.set_property("video-sink", self.videosink)
        self.player.set_property("audio-sink", self.sink)
        self.player_bus = self.player.get_bus()
        self.player_bus.add_signal_watch()
        self.player_bus.connect("message", self.on_messages)
        self.player.connect("about-to-finish", self.on_finish)
        self.main_window = main_window
        self.main_window.seek_bar.connect("value-changed", self.on_slider_changed)
        self.main_window.seek_bar.set_range(0, 100)
        self.playing = False

    def on_messages(self, bus, message):
        print(message)


    def play(self, file):
        self.playing = True
        self.player.set_state(gst.STATE_READY)
        self.player.set_property("uri", "file:///"+str(file)) # örnek olsun diye
        self.player.set_state(gst.STATE_PLAYING)
        GObject.timeout_add(100, self.update_slider)
    [...]

我从另一个这样的类中调用它来播放声音：

from file import PlayerControl
class PlayerExample():
    def __init__( self ):
    self.player_gst = PlayerControl(self)
    [...]
    def play(self, file):
        self.playing = True
        self.player.set_state(gst.STATE_READY)
        self.player.set_property("uri", "file:///"+str(file))
        self.player.set_state(gst.STATE_PLAYING)
        GObject.timeout_add(100, self.update_slider)
    [...]

我已经连接了gtk按钮来播放功能。当我点击按钮时，我会segmentation fault没有任何信息。此外，如果我从我的PlayerControl类中删除self.player_bus.add_signal_watch()和self.player.connect("about-to-finish", self.on_finish)行，它会工作并播放声音，但我需要使用“即将完成”信号调用on_finished函数。为什么它不起作用？

Answer 1

来自gi.repository的

GObject.threads_init()不适用于pygst“0.10” 你需要添加：

import gobject
gobject.threads_init()
import gst

播放器类的顶部。或者使用Gst-1.0 https://wiki.ubuntu.com/Novacut/GStreamer1.0

Python gst分段错误

1 个答案: