python kivy 添加背景视频 mp4
在kivy中，可以把视频（mp4格式）作为背景播放吗？我用下面的代码，但视频就是加载不出来……
__author__ = 'kshk'
import kivy
kivy.require('1.8.0')
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.gridlayout import GridLayout
from kivy.uix.textinput import TextInput
from kivy.uix.video import Video
class Dashboard(GridLayout):
def __init__(self, **kwargs):
super(Dashboard,self).__init__(**kwargs)
self.cols = 2
self.add_widget(Label(text="Login"))
self.username = TextInput(multiline=False)
self.add_widget(self.username)
self.add_widget(Label(text="Password"))
self.password = TextInput(password=True,multiline=False)
self.add_widget(self.password)
self.video = Video(source="/tmpt/driver.mp4")
self.add_widget(self.video)
class MyApp(App):
def build(self):
return Dashboard()
if __name__ == '__main__':
MyApp().run()
更新：
日志：
/usr/bin/python /home/kshk/PycharmProjects/KSHK-PYQT1/main.py
[INFO ] Kivy v1.8.0
[INFO ] [Logger ] Record log in /home/kshk/.kivy/logs/kivy_14-07-13_58.txt
[INFO ] [Factory ] 157 symbols loaded
[DEBUG ] [Cache ] register <kv.lang> with limit=None, timeout=Nones
[DEBUG ] [Cache ] register <kv.image> with limit=None, timeout=60s
[DEBUG ] [Cache ] register <kv.atlas> with limit=None, timeout=Nones
[INFO ] [Image ] Providers: img_tex, img_dds, img_pygame, img_pil, img_gif
[DEBUG ] [Cache ] register <kv.texture> with limit=1000, timeout=60s
[DEBUG ] [Cache ] register <kv.shader> with limit=1000, timeout=3600s
[INFO ] [Text ] Provider: pygame
[DEBUG ] [Cache ] register <kv.loader> with limit=500, timeout=60s
[INFO ] [Loader ] using a thread pool of 2 workers
[DEBUG ] [Cache ] register <textinput.label> with limit=None, timeout=60.0s
[DEBUG ] [Cache ] register <textinput.width> with limit=None, timeout=60.0s
[DEBUG ] [Video ] Ignored <pygst> (import error)
[DEBUG ] [Video ] Ignored <ffmpeg> (import error)
[DEBUG ] [Video ] Ignored <pyglet> (import error)
[INFO ] [Video ] Provider: null(['video_pygst', 'video_ffmpeg', 'video_pyglet'] ignored)
[DEBUG ] [App ] Loading kv </home/kshk/PycharmProjects/KSHK-PYQT1/my.kv>
[DEBUG ] [App ] kv </home/kshk/PycharmProjects/KSHK-PYQT1/my.kv> not found
[DEBUG ] [Window ] Ignored <egl_rpi> (import error)
[INFO ] [Window ] Provider: pygame(['window_egl_rpi'] ignored)
libpng warning: iCCP: known incorrect sRGB profile
[WARNING ] [WinPygame ] Video: failed (multisamples=2)
[WARNING ] [WinPygame ] trying without antialiasing
[DEBUG ] [Window ] Display driver x11
[DEBUG ] [Window ] Actual window size: 800x600
[DEBUG ] [Window ] Actual color bits r8 g8 b8 a0
[DEBUG ] [Window ] Actual depth bits: 24
[DEBUG ] [Window ] Actual stencil bits: 8
[DEBUG ] [Window ] Actual multisampling samples: 0
[INFO ] [GL ] OpenGL version <2.1 Mesa 10.1.5>
[INFO ] [GL ] OpenGL vendor <VMware, Inc.>
[INFO ] [GL ] OpenGL renderer <Gallium 0.4 on llvmpipe (LLVM 3.4, 256 bits)>
[INFO ] [GL ] OpenGL parsed version: 2, 1
[INFO ] [GL ] Shading version <1.30>
[INFO ] [GL ] Texture max size <8192>
[INFO ] [GL ] Texture max units <16>
[DEBUG ] [Shader ] Fragment compiled successfully
[DEBUG ] [Shader ] Vertex compiled successfully
[DEBUG ] [ImagePygame ] Load </usr/lib/python2.7/site-packages/kivy/data/glsl/default.png>
[INFO ] [Window ] virtual keyboard not allowed, single mode, not docked
[DEBUG ] [Atlas ] Load </usr/lib/python2.7/site-packages/kivy/data/../data/images/defaulttheme.atlas>
[DEBUG ] [Atlas ] Need to load 1 images
[DEBUG ] [Atlas ] Load </usr/lib/python2.7/site-packages/kivy/data/../data/images/defaulttheme-0.png>
[DEBUG ] [ImagePygame ] Load </usr/lib/python2.7/site-packages/kivy/data/../data/images/defaulttheme-0.png>
[INFO ] [OSC ] using <multiprocessing> for socket
[DEBUG ] [Base ] Create provider from mouse
[DEBUG ] [Base ] Create provider from probesysfs
[DEBUG ] [ProbeSysfs ] using probsysfs!
[INFO ] [Base ] Start application main loop
[INFO ] [GL ] NPOT texture support is available
[INFO ] [Base ] Leaving application in progress...
更新：现在我尝试使用AnchorLayout，把视频放在背景中，前面用GridLayout……
main.py
__author__ = 'kshk'
import kivy
kivy.require('1.8.0')
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.gridlayout import GridLayout
from kivy.uix.textinput import TextInput
from kivy.uix.video import Video
from kivy.uix.widget import Widget
from kivy.uix.anchorlayout import AnchorLayout
class MyWidget(Widget):
pass
class WidgetsApp(App):
def build(self):
return MyWidget()
if __name__ == '__main__':
WidgetsApp().run()
widgets.kv
#File widgets.kv
#:kivy 1.8.0
<MyWidget>:
AnchorLayout:
Video:
source: 'driver.avi'
size: 100,100
GridLayout:
Button:
text: 'Hello'
pos: 0,100
size: 100, 50
color: .8, .9, 0, 1
font_size: 32
Button:
text: 'World!'
pos: 100,0
size: 100, 50
color: .8, .9, 0, 1
font_size: 32
我看到的只是黑屏！……
更新：
我找到了这个错误……有没有人知道怎么获取这个插件？我已经安装了gstreamer。
[DEBUG ] [VideoPyGst ] Load <driver.mp4>
** Message: don't know how to handle video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, level=(string)4.2, profile=(string)main, width=(int)1920, height=(int)1080, framerate=(fraction)2997/125, pixel-aspect-ratio=(fraction)1/1, parsed=(boolean)true
[ERROR ] [VideoPyGst ] There is no codec present that can handle the stream's type.
[DEBUG ] [VideoPyGst ] gstplaybasebin.c(2323): prepare_output (): /GstPlayBin:playbin
[ERROR ] [VideoPyGst ] GStreamer encountered a general stream error.
[DEBUG ] [VideoPyGst ] qtdemux.c(3891): gst_qtdemux_loop (): /GstPlayBin:playbin/GstDecodeBin:decodebin0/GstQTDemux:qtdemux0:
streaming stopped, reason not-linked
[INFO ] [Base ] Leaving application in progress...
更新：
在mac上可以正常工作，没有问题，所以看起来在fedora上是插件的问题…… :(
2 个回答
0
我看到的只是一个黑屏！...
关于这个黑屏的问题，可能是因为你没有把 Python 文件和 .kv 文件连接起来。这两个文件的连接应该用 Builder.load_file() 来实现。
比如说..
...
from kivy.uix.anchorlayout import AnchorLayout
Builder.load_file("widgets.kv")
class MyWidget(Widget):
pass
...
希望这能帮到你。
1
在kivy中可以把视频(mp4)作为背景播放吗？
可以的，只要把视频放在你想显示的其他内容的后面就行。不过你给的例子做不到这一点，因为它是放在网格布局(gridlayout)里的。你可能想用一个锚布局(AnchorLayout)，这样可以把两个子元素放在同一个位置（这不是唯一的方法，但很简单）。
AnchorLayout:
Video:
source: 'whatever'
GridLayout:
# ... <- your normal stuff goes here
至于为什么你的视频不显示，我就不太清楚了。你确定文件路径是正确的吗？在终端里有没有看到相关的日志信息？