蟒蛇+的GStreamer插件

Question

我有一个生成该错误代码：

** Message: pygobject_register_sinkfunc is deprecated (GstObject) 
Traceback (most recent call last): 
File "PlayingVideo.py", line 199, in <module> 
player = VideoPlayer() 
File "PlayingVideo.py", line 84, in __init__ 
self.constructPipeline() 
File "PlayingVideo.py", line 99, in constructPipeline 
self.decodebin = gst.element_factory_make("decodebin") 
gst.ElementNotFoundError: decodebin 

下面的代码：

import time 
import thread 
import gobject 
import pygst 
pygst.require("0.10") 
import gst 
import os 

class VideoPlayer: 
    """ 
    Simple Video player that just 'plays' a valid input Video file. 
    """ 
    def __init__(self): 
     self.use_parse_launch = False 
     self.decodebin = None 
     self.inFileLocation="YE7VID_720_60_P_MVI_1921.MOV" 

     self.constructPipeline() 
     self.is_playing = False 
     self.connectSignals() 

    def constructPipeline(self): 
     """ 
     Add and link elements in a GStreamer pipeline. 
     """ 
     # Create the pipeline instance 
     self.player = gst.Pipeline() 

     # Define pipeline elements 
     self.filesrc = gst.element_factory_make("filesrc") 
     self.filesrc.set_property("location", 
           self.inFileLocation) 
     self.decodebin = gst.element_factory_make("decodebin") 

     # audioconvert for audio processing pipeline 
     self.audioconvert = gst.element_factory_make("audioconvert") 

     # Autoconvert element for video processing 
     self.autoconvert = gst.element_factory_make("autoconvert") 

     self.audiosink = gst.element_factory_make("autoaudiosink") 

     self.videosink = gst.element_factory_make("autovideosink") 

     # As a precaution add videio capability filter 
     # in the video processing pipeline. 
     videocap = gst.Caps("video/x-raw-yuv") 
     self.filter = gst.element_factory_make("capsfilter") 
     self.filter.set_property("caps", videocap) 
     # Converts the video from one colorspace to another 
     self.colorSpace = gst.element_factory_make("ffmpegcolorspace") 

     self.queue1 = gst.element_factory_make("queue") 
     self.queue2 = gst.element_factory_make("queue") 

     # Add elements to the pipeline 
     self.player.add(self.filesrc, 
         self.decodebin, 
         self.autoconvert, 
         self.audioconvert, 
         self.queue1, 
         self.queue2, 
         self.filter, 
         self.colorSpace, 
         self.audiosink, 
         self.videosink) 

     # Link elements in the pipeline. 
     gst.element_link_many(self.filesrc, self.decodebin) 
     gst.element_link_many(self.queue1, self.autoconvert, 
           self.filter, self.colorSpace, 
           self.videosink) 
     gst.element_link_many(self.queue2, self.audioconvert, 
           self.audiosink) 

    def connectSignals(self): 
     """ 
     Connects signals with the methods. 
     """ 
     # Capture the messages put on the bus. 
     bus = self.player.get_bus() 
     bus.add_signal_watch() 
     bus.connect("message", self.message_handler) 

     # Connect the decodebin signal 
     if not self.decodebin is None: 
      self.decodebin.connect("pad_added", self.decodebin_pad_added) 

    def decodebin_pad_added(self, decodebin, pad): 
     """ 
     Manually link the decodebin pad with a compatible pad on 
     queue elements, when the decodebin "pad-added" signal 
     is generated. 
     """ 
     compatible_pad = None 
     caps = pad.get_caps() 
     name = caps[0].get_name() 
     print "\n cap name is = ", name 
     if name[:5] == 'video': 
      compatible_pad = self.queue1.get_compatible_pad(pad, caps) 
     elif name[:5] == 'audio': 
      compatible_pad = self.queue2.get_compatible_pad(pad, caps) 

     if compatible_pad: 
      pad.link(compatible_pad) 

    def play(self): 
     """ 
     Play the media file 
     """ 
     self.is_playing = True 
     self.player.set_state(gst.STATE_PLAYING) 
     while self.is_playing: 
      time.sleep(1) 
     evt_loop.quit() 

    def message_handler(self, bus, message): 
     """ 
     Capture the messages on the bus and 
     set the appropriate flag. 
     """ 
     msgType = message.type 
     if msgType == gst.MESSAGE_ERROR: 
      self.player.set_state(gst.STATE_NULL) 
      self.is_playing = False 
      print "\n Unable to play Video. Error: ", \ 
      message.parse_error() 
     elif msgType == gst.MESSAGE_EOS: 
      self.player.set_state(gst.STATE_NULL) 
      self.is_playing = False 

# Run the program 
player = VideoPlayer() 
thread.start_new_thread(player.play,()) 
gobject.threads_init() 
evt_loop = gobject.MainLoop() 
evt_loop.run() 

我用的archlinux并安装所有的GStreamer PKGS。与decodebin这个问题之前，我得到了类似的错误与autoconvert，videosink等..

[zen@(none) lebut]$ locate decodebin 
/home/zen/Downloads/decodebin.py 
/usr/lib/gstreamer-0.10/libgstdecodebin.so 
/usr/lib/gstreamer-0.10/libgstdecodebin2.so 
/usr/share/gst-python/0.10/examples/decodebin.py 
/usr/share/gtk-doc/html/gst-plugins-base-plugins-0.10/gst-plugins-base-plugins-decodebin.html 
/usr/share/gtk-doc/html/gst-plugins-base-plugins-0.10/gst-plugins-base-plugins-decodebin2.html 
/usr/share/gtk-doc/html/gst-plugins-base-plugins-0.10/gst-plugins-base-plugins-plugin-decodebin.html 
/usr/share/gtk-doc/html/gst-plugins-base-plugins-0.10/gst-plugins-base-plugins-plugin-uridecodebin.html 
/usr/share/gtk-doc/html/gst-plugins-base-plugins-0.10/gst-plugins-base-plugins-uridecodebin.html 

这似乎是某种形式的包装问题。有没有人有任何想法？

Answer 1

解决方法是删除文件夹〜/ .gstreamer-0.10

Answer 2

self.decodebin = gst.element_factory_make("decodebin") 

根据Reference Manual，decodebin已被弃用且不再被支持。尝试使用decodebin2代替。