商品及服务税推出假'；“无要素”；udpsrc“'；错误

命令：gst-launch-udpsrc-port=5000 返回：错误：无法构造管道：没有元素“udpsrc”

命令：gst-launch-1.0 udpsrc-uri=udp://239.194.0.177:1026 没有，并且（大概）正确执行

第一个命令来自许多流媒体教程，例如..
第二个命令是从。这只是为了表明udpsrc存在。
他们被削减到了令人不快的部分

我拥有所有与gstreamer1.0相关的最新信息（适用于Ubuntu 16.04.6）：

gstreamer1.0-clart-3.0已经是最新版本（3.0.18-1）。
gstreamer1.0-croot已经是最新版本（2.0.18-1）。
gstreamer1.0-crystalhd已经是最新版本（1:0.0~Git2010715.fdd2f19-11build1）。
gstreamer1.0-dvswitch已经是最新版本（0.1.1-1）。
gstreamer1.0-espeak已经是最新版本（0.4.0-1）。
gstreamer1.0-fluendo-mp3已经是最新版本（0.10.32.debian-1）。
gstreamer1.0-nice已经是最新版本（0.1.13-0ubuntu2）。
gstreamer1.0-pocketsphinx已经是最新版本（0.8.0+real5prealpha-1ubuntu2）。
gstreamer1.0-alsa已经是最新版本（1.8.3-1ubuntu0.3）。
gstreamer1.0-doc已经是最新版本（1.8.3-1~ubuntu0.1）。
gstreamer1.0-plugins-base已经是最新版本（1.8.3-1ubuntu0.3）。
gstreamer1.0-plugins-base-apps已经是最新版本（1.8.3-1ubuntu0.3）。
gstreamer1.0-plugins-base-dbg已经是最新版本（1.8.3-1ubuntu0.3）。
gstreamer1.0-plugins-base-doc已经是最新版本（1.8.3-1ubuntu0.3）。
gstreamer1.0-plugins-good已经是最新版本（1.8.3-1ubuntu0.4）。
gstreamer1.0-plugins-good-dbg已经是最新版本（1.8.3-1ubuntu0.4）。
gstreamer1.0-plugins-good-doc已经是最新版本（1.8.3-1ubuntu0.4）。
gstreamer1.0-pulseaudio已经是最新版本（1.8.3-1ubuntu0.4）。
gstreamer1.0-tools已经是最新版本（1.8.3-1~ubuntu0.1）。
gstreamer1.0-x已经是最新版本（1.8.3-1ubuntu0.3）。
libgstreamer1.0-0已经是最新版本（1.8.3-1~ubuntu0.1）。
libgstreamer1.0-0-dbg已经是最新版本（1.8.3-1~ubuntu0.1）。
libgstreamer1.0-dev已经是最新版本（1.8.3-1~ubuntu0.1）。
gstreamer1.0-libav已经是最新版本（1.8.3-1ubuntu0.2）。
gstreamer1.0-libav-dbg已经是最新版本（1.8.3-1ubuntu0.2）。
gstreamer1.0-packagekit已经是最新版本（0.8.17-4ubuntu6~gcc5.4ubuntu1.4）。
gstreamer1.0-plugins-bad已经是最新版本（1.8.3-1ubuntu0.2）。
gstreamer1.0-plugins-bad-dbg已经是最新版本（1.8.3-1ubuntu0.2）。
gstreamer1.0-plugins-bad-doc已经是最新版本（1.8.3-1ubuntu0.2）。
gstreamer1.0-plugins-bad-faad已经是最新版本（1.8.3-1ubuntu0.2）。
gstreamer1.0-plugins-bad-videoparsers已经是最新版本（1.8.3-1ubuntu0.2）。
gstreamer1.0-plugins-sugger已经是最新版本（1.8.3-1ubuntu0.1）。
gstreamer1.0-plugins-ught-amr已经是最新版本（1.8.3-1ubuntu0.1）。
gstreamer1.0-plugins-ught-dbg已经是最新版本（1.8.3-1ubuntu0.1）。
gstreamer1.0-plugins-ught-doc已经是最新版本（1.8.3-1ubuntu0.1）。
gstreamer1.0-vaapi已经是最新版本（1.8.3-1~ubuntu0.1）。
gstreamer1.0-vaapi-doc已经是最新版本（1.8.3-1~ubuntu0.1）。
gstreamer1.0-hybris:i386已经是最新版本（1.8.3-1ubuntu0.2）。
$gst-inspect-1.0 udpsrc
工厂详情：
排名无（0）
长名称UDP数据包接收器
Klass源/网络
说明通过UDP通过网络接收数据
作者维姆·泰曼斯，Thijs Vermeir
插件详细信息：
名称udp
说明通过UDP传输数据
Filename/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstudp.so
版本1.8.3
许可证LGPL
源模块gst插件很好
来源发布日期2016-08-19
二进制包GStreamer好插件（Ubuntu）
源URLhttps://launchpad.net/distros/ubuntu/+来源/gst-plugins-good1.0
戈宾特
+----吉尼泰尔酒店
+----GstObject
+----GstElement
+----GstBaseSrc
+----GSTPUSHRC
+----GstUDPSrc
实现的接口：
格斯图里汉德勒
焊盘模板：
SRC模板：“SRC”
可用性：始终
能力：
任何
元素标志：
不设旗帜
要素实施：
具有change_state（）函数：0x7f38aa386e10
元素没有时钟功能。
URI处理能力：
元素可以作为源。
支持的URI协议：
udp
垫：
SRC:'SRC'
Pad模板：“src”
元素属性：
名称：对象的名称
标志：可读、可写
一串默认值：“udpsrc0”
父对象：对象的父对象
标志：可读、可写
类型为“GstObject”的对象
blocksize：每个缓冲区要读取的字节大小（-1=默认值）
标志：可读、可写
无符号整数。范围：0-4294967295默认值：4096
num buffers：发送EOS之前要输出的缓冲区数（-1=无限）
标志：可读、可写
整数。范围：-1-2147483647默认值：-1
typefind：在协商之前运行typefind
标志：可读、可写
布尔型。默认值：false
do timestamp：将当前流时间应用于缓冲区
标志：可读、可写
布尔型。默认值：true
端口：从中接收数据包的端口，0=分配
标志：可读、可写
Inte
gstreamer1.0-clutter-3.0 is already the newest version (3.0.18-1).
gstreamer1.0-clutter is already the newest version (2.0.18-1).
gstreamer1.0-crystalhd is already the newest version (1:0.0~git20110715.fdd2f19-11build1).
gstreamer1.0-dvswitch is already the newest version (0.1.1-1).
gstreamer1.0-espeak is already the newest version (0.4.0-1).
gstreamer1.0-fluendo-mp3 is already the newest version (0.10.32.debian-1).
gstreamer1.0-nice is already the newest version (0.1.13-0ubuntu2).
gstreamer1.0-pocketsphinx is already the newest version (0.8.0+real5prealpha-1ubuntu2).
gstreamer1.0-alsa is already the newest version (1.8.3-1ubuntu0.3).
gstreamer1.0-doc is already the newest version (1.8.3-1~ubuntu0.1).
gstreamer1.0-plugins-base is already the newest version (1.8.3-1ubuntu0.3).
gstreamer1.0-plugins-base-apps is already the newest version (1.8.3-1ubuntu0.3).
gstreamer1.0-plugins-base-dbg is already the newest version (1.8.3-1ubuntu0.3).
gstreamer1.0-plugins-base-doc is already the newest version (1.8.3-1ubuntu0.3).
gstreamer1.0-plugins-good is already the newest version (1.8.3-1ubuntu0.4).
gstreamer1.0-plugins-good-dbg is already the newest version (1.8.3-1ubuntu0.4).
gstreamer1.0-plugins-good-doc is already the newest version (1.8.3-1ubuntu0.4).
gstreamer1.0-pulseaudio is already the newest version (1.8.3-1ubuntu0.4).
gstreamer1.0-tools is already the newest version (1.8.3-1~ubuntu0.1).
gstreamer1.0-x is already the newest version (1.8.3-1ubuntu0.3).
libgstreamer1.0-0 is already the newest version (1.8.3-1~ubuntu0.1).
libgstreamer1.0-0-dbg is already the newest version (1.8.3-1~ubuntu0.1).
libgstreamer1.0-dev is already the newest version (1.8.3-1~ubuntu0.1).
gstreamer1.0-libav is already the newest version (1.8.3-1ubuntu0.2).
gstreamer1.0-libav-dbg is already the newest version (1.8.3-1ubuntu0.2).
gstreamer1.0-packagekit is already the newest version (0.8.17-4ubuntu6~gcc5.4ubuntu1.4).
gstreamer1.0-plugins-bad is already the newest version (1.8.3-1ubuntu0.2).
gstreamer1.0-plugins-bad-dbg is already the newest version (1.8.3-1ubuntu0.2).
gstreamer1.0-plugins-bad-doc is already the newest version (1.8.3-1ubuntu0.2).
gstreamer1.0-plugins-bad-faad is already the newest version (1.8.3-1ubuntu0.2).
gstreamer1.0-plugins-bad-videoparsers is already the newest version (1.8.3-1ubuntu0.2).
gstreamer1.0-plugins-ugly is already the newest version (1.8.3-1ubuntu0.1).
gstreamer1.0-plugins-ugly-amr is already the newest version (1.8.3-1ubuntu0.1).
gstreamer1.0-plugins-ugly-dbg is already the newest version (1.8.3-1ubuntu0.1).
gstreamer1.0-plugins-ugly-doc is already the newest version (1.8.3-1ubuntu0.1).
gstreamer1.0-vaapi is already the newest version (1.8.3-1~ubuntu0.1).
gstreamer1.0-vaapi-doc is already the newest version (1.8.3-1~ubuntu0.1).
gstreamer1.0-hybris:i386 is already the newest version (1.8.3-1ubuntu0.2).



$ gst-inspect-1.0 udpsrc
Factory Details:
  Rank                     none (0)
  Long-name                UDP packet receiver
  Klass                    Source/Network
  Description              Receive data over the network via UDP
  Author                   Wim Taymans <wim@fluendo.com>, Thijs Vermeir <thijs.vermeir@barco.com>

Plugin Details:
  Name                     udp
  Description              transfer data via UDP
  Filename                 /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstudp.so
  Version                  1.8.3
  License                  LGPL
  Source module            gst-plugins-good
  Source release date      2016-08-19
  Binary package           GStreamer Good Plugins (Ubuntu)
  Origin URL               https://launchpad.net/distros/ubuntu/+source/gst-plugins-good1.0

GObject
 +----GInitiallyUnowned
       +----GstObject
             +----GstElement
                   +----GstBaseSrc
                         +----GstPushSrc
                               +----GstUDPSrc

Implemented Interfaces:
  GstURIHandler

Pad Templates:
  SRC template: 'src'
    Availability: Always
    Capabilities:
      ANY


Element Flags:
  no flags set

Element Implementation:
  Has change_state() function: 0x7f38aa386e10

Element has no clocking capabilities.

URI handling capabilities:
  Element can act as source.
  Supported URI protocols:
    udp

Pads:
  SRC: 'src'
    Pad Template: 'src'

Element Properties:
  name                : The name of the object
                        flags: readable, writable
                        String. Default: "udpsrc0"
  parent              : The parent of the object
                        flags: readable, writable
                        Object of type "GstObject"
  blocksize           : Size in bytes to read per buffer (-1 = default)
                        flags: readable, writable
                        Unsigned Integer. Range: 0 - 4294967295 Default: 4096 
  num-buffers         : Number of buffers to output before sending EOS (-1 = unlimited)
                        flags: readable, writable
                        Integer. Range: -1 - 2147483647 Default: -1 
  typefind            : Run typefind before negotiating
                        flags: readable, writable
                        Boolean. Default: false
  do-timestamp        : Apply current stream time to buffers
                        flags: readable, writable
                        Boolean. Default: true
  port                : The port to receive the packets from, 0=allocate
                        flags: readable, writable
                        Integer. Range: 0 - 65535 Default: 5004 
  multicast-group     : The Address of multicast group to join. (DEPRECATED: Use address property instead)
                        flags: readable, writable, deprecated
                        String. Default: "0.0.0.0"
  multicast-iface     : The network interface on which to join the multicast group
                        flags: readable, writable
                        String. Default: null
  uri                 : URI in the form of udp://multicast_group:port
                        flags: readable, writable
                        String. Default: "udp://0.0.0.0:5004"
  caps                : The caps of the source pad
                        flags: readable, writable
                        Caps (NULL)
  socket              : Socket to use for UDP reception. (NULL == allocate)
                        flags: readable, writable
                        Object of type "GSocket"
  buffer-size         : Size of the kernel receive buffer in bytes, 0=default
                        flags: readable, writable
                        Integer. Range: 0 - 2147483647 Default: 0 
  timeout             : Post a message after timeout nanoseconds (0 = disabled)
                        flags: readable, writable
                        Unsigned Integer64. Range: 0 - 18446744073709551615 Default: 0 
  skip-first-bytes    : number of bytes to skip for each udp packet
                        flags: readable, writable
                        Integer. Range: 0 - 2147483647 Default: 0 
  close-socket        : Close socket if passed as property on state change
                        flags: readable, writable
                        Boolean. Default: true
  used-socket         : Socket currently in use for UDP reception. (NULL = no socket)
                        flags: readable
                        Object of type "GSocket"
  auto-multicast      : Automatically join/leave multicast groups
                        flags: readable, writable
                        Boolean. Default: true
  reuse               : Enable reuse of the port
                        flags: readable, writable
                        Boolean. Default: true
  address             : Address to receive packets for. This is equivalent to the multicast-group property for now
                        flags: readable, writable
                        String. Default: "0.0.0.0"
  loop                : Used for setting the multicast loop parameter. TRUE = enable, FALSE = disable
                        flags: readable, writable
                        Boolean. Default: true