我开发了一个Kivy Python应用程序。它应该有一个健全的效果。在Kivy中，它简单为：
from kivy.core.audio import SoundLoader
...
def btn(self):
sound = SoundLoader.load("images/crunch.ogg")
if sound:
sound.play()
当这段代码运行时，我得到了：
[WARNING] [AudioGstplayer] b"No decoder available for type 'audio/x-wav'."
[ERROR ] [AudioGstplayer] b'Your GStreamer installation is missing a plug-in.'
[ERROR ] [AudioGstplayer] b'Internal data stream error.'
我了解到Kivy使用GStreamer。所以我试着在终端中使用它的基本实用程序来播放声音：
(base) $ gst-play-1.0 -v PycharmProjects/dima_kivy/images/crunch.wav
Press 'k' to see a list of keyboard shortcuts.
Now playing /home/slv/PycharmProjects/dima_kivy/images/crunch.wav
/GstPlayBin:playbin/GstURIDecodeBin:uridecodebin0: ring-buffer-max-size = 0
/GstPlayBin:playbin/GstURIDecodeBin:uridecodebin0: buffer-size = -1
/GstPlayBin:playbin/GstURIDecodeBin:uridecodebin0: buffer-duration = -1
/GstPlayBin:playbin/GstURIDecodeBin:uridecodebin0: use-buffering = false
/GstPlayBin:playbin/GstURIDecodeBin:uridecodebin0: download = false
/GstPlayBin:playbin/GstURIDecodeBin:uridecodebin0: uri = file:///home/slv/PycharmProjects/dima_kivy/images/crunch.wav
/GstPlayBin:playbin/GstURIDecodeBin:uridecodebin0: connection-speed = 0
/GstPlayBin:playbin/GstURIDecodeBin:uridecodebin0: source = "(GstFileSrc) source"
/GstPlayBin:playbin/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind.GstPad:src: caps = audio/x-wav
WARNING No decoder available for type 'audio/x-wav'.
WARNING debug information: gsturidecodebin.c(921): unknown_type_cb (): /GstPlayBin:playbin/GstURIDecodeBin:uridecodebin0
ERROR Your GStreamer installation is missing a plug-in. for file:///home/slv/PycharmProjects/dima_kivy/images/crunch.wav
ERROR debug information: gsturidecodebin.c(988): no_more_pads_full (): /GstPlayBin:playbin/GstURIDecodeBin:uridecodebin0:
no suitable plugins found:
gstdecodebin2.c(4679): gst_decode_bin_expose (): /GstPlayBin:playbin/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0:
no suitable plugins found:
Missing decoder: WAV (audio/x-wav)
问题似乎与Kivy无关。我在谷歌上搜索了一下安装帮助的人——我也是：
sudo apt-get install libgstreamer1.0-0 gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly gstreamer1.0-libav gstreamer1.0-doc gstreamer1.0-tools gstreamer1.0-x gstreamer1.0-alsa gstreamer1.0-gl gstreamer1.0-gtk3 gstreamer1.0-qt5 gstreamer1.0-pulseaudio
运行此"；安装所有"；命令什么也没改变。行为保持不变。我想有一些错误的配置，但我甚至不知道在哪里可以找到(
求你了，救命！
我的系统：Ubuntu 20.04.1 LTS
gst-inspect-1.0输出：
(base) slv@slv-ubuntu-comp:~$ gst-inspect-1.0 audio/x-wav
Factory Details:
Rank primary (256)
Name audio/x-wav
Caps audio/x-wav
Extensions wav
Plugin Details:
Name typefindfunctions
Description default typefind functions
Filename /home/slv/miniconda3/lib/gstreamer-1.0/libgsttypefindfunctions.so
Version 1.14.5
License LGPL
Source module gst-plugins-base
Source release date 2019-05-29
Binary package GStreamer Base Plug-ins source release
Origin URL Unknown package origin
(base) slv@slv-ubuntu-comp:~$ gst-inspect-1.0 | grep wav
typefindfunctions: application/x-shockwave-flash: swf, swfl
typefindfunctions: audio/x-wav: wav
typefindfunctions: audio/x-wavpack: wv, wvp
typefindfunctions: audio/x-wavpack-correction: wvc
最后我发现当我使用conda:安装时
conda install kivy -c conda-forge
我不小心也在baseconda环境中创建了它，结果导致gstreamer的标准Ubuntu安装的系统路径被覆盖。因此，我通过删除该环境中的kivy来修复我的基础conda环境。现在命令gst-play-1.0~/PycharmProjects/dima_kiv/images/crunch.wav运行良好，并在基本环境中产生预期的声音。
至于错误"；gstreamer：没有可用于类型"audio/x-wav"的解码器/没有找到合适的插件"；在我的开发环境中，我向前迈出了一步，在我的发展环境中安装了来自conda-forge的good插件，如下所示：
conda install gst-plugins-good -c conda-forge
它修复了标题中提到的错误，但我的电脑仍然没有声音。对于这个新问题，我将向stackoverflow社区提出另一个问题。