从 MPG 加载纹理
Loading texture from MPG
错误：
[ERROR ] [Image ] Error loading texture somevideo.mpg
实际结果：
- 出现错误，我无法使用除
play() 之外的任何属性
参考代码：
from functools import partial
from kivy.clock import Clock
from kivy.uix.video import Video
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.screenmanager import Screen, ScreenManager
from kivy.app import App
class VideoPlayScreen(Screen):
def __init__(self, **kwargs):
super(VideoPlayScreen, self).__init__(**kwargs)
box_layout = BoxLayout()
self.video1 = Video(source="cityCC0.mpg")
box_layout.add_widget(self.video1)
self.add_widget(box_layout)
def on_enter(self, *args):
print(self.video1.state)
self.video1.state = "play"
print(self.video1.state)
Clock.schedule_interval(partial(print, self.video1.loaded), 0.5)
sm = ScreenManager()
sm.add_widget(VideoPlayScreen(name="video_play"))
sm.current = "video_play"
class OpenCity(App):
def build(self):
return sm
if __name__ == '__main__':
OpenCity().run()
cityCC1.mpg是kivy给的。在 kivy_examples 文件夹中检查它。
运行日志：
[INFO ] [Logger ] Record log in C:\Users\kanna\.kivy\logs\kivy_20-03-01_28.txt
[INFO ] [deps ] Successfully imported "kivy_deps.gstreamer" 0.2.0
[INFO ] [deps ] Successfully imported "kivy_deps.glew" 0.2.0
[INFO ] [deps ] Successfully imported "kivy_deps.sdl2" 0.1.23
[INFO ] [Kivy ] v1.11.1
[INFO ] [Kivy ] Installed at "F:\Python Kivy\lib\site-packages\kivy\__init__.py"
[INFO ] [Python ] v3.7.6 (tags/v3.7.6:43364a7ae0, Dec 18 2019, 23:46:00) [MSC v.1916 32 bit (Intel)]
[INFO ] [Python ] Interpreter at "F:\Python Kivy\Scripts\python.exe"
[INFO ] [Factory ] 184 symbols loaded
[INFO ] [ImageLoaderFFPy] Using ffpyplayer 4.3.0
[INFO ] [Image ] Providers: img_tex, img_dds, img_sdl2, img_ffpyplayer, img_gif (img_pil ignored)
[INFO ] [VideoGstplayer] Using Gstreamer 1.16.2.0
[INFO ] [Video ] Provider: gstplayer
[INFO ] [Window ] Provider: sdl2
[INFO ] [GL ] Using the "OpenGL" graphics system
[INFO ] [GL ] GLEW initialization succeeded
[INFO ] [GL ] Backend used <glew>
[INFO ] [GL ] OpenGL version <b'4.6.0 - Build 26.20.100.7262'>
[INFO ] [GL ] OpenGL vendor <b'Intel'>
[INFO ] [GL ] OpenGL renderer <b'Intel(R) UHD Graphics 630'>
[INFO ] [GL ] OpenGL parsed version: 4, 6
[INFO ] [GL ] Shading version <b'4.60 - Build 26.20.100.7262'>
[INFO ] [GL ] Texture max size <16384>
[INFO ] [GL ] Texture max units <32>
[INFO ] [Window ] auto add sdl2 input provider
[INFO ] [Window ] virtual keyboard not allowed, single mode, not docked
[ERROR ] [Image ] Error loading texture cityCC0.mpg
[INFO ] [Base ] Start application main loop
stop
play
False 0.9090554999999999
[INFO ] [GL ] NPOT texture support is available
False 0.5063968000000001
False 0.4993861999999998
False 0.49537330000000024
[INFO ] [WindowSDL ] exiting mainloop and closing.
[INFO ] [Base ] Leaving application in progress...
它将 运行 日志显示为代码。
一如既往地感谢阅读。
此后的问题将 link 发送到包含代码日志的 pastebin。
根据 documentation、partial
“freezes” some portion of a function’s arguments
因此 partial 中的 print 函数只是打印 self.video1.loaded 的值，就像调用 partial 函数时一样。
这是您发布的代码的一个版本，它每半秒打印一次 loaded 的当前版本：
from kivy.clock import Clock
from kivy.uix.video import Video
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.screenmanager import Screen, ScreenManager
from kivy.app import App
class VideoPlayScreen(Screen):
def __init__(self, **kwargs):
super(VideoPlayScreen, self).__init__(**kwargs)
box_layout = BoxLayout()
self.video1 = Video(source="cityCC0.mpg")
box_layout.add_widget(self.video1)
self.add_widget(box_layout)
def on_enter(self, *args):
print(self.video1.state)
self.video1.state = "play"
print(self.video1.state)
Clock.schedule_interval(self.check_loaded, 0.5)
def check_loaded(self, dt):
print(self.video1.loaded)
sm = ScreenManager()
sm.add_widget(VideoPlayScreen(name="video_play"))
sm.current = "video_play"
class OpenCity(App):
def build(self):
return sm
if __name__ == '__main__':
OpenCity().run()
结果输出：
[ERROR ] [Image ] Error loading texture cityCC0.mpg
stop
play
[INFO ] [ProbeSysfs ] device match: /dev/input/event7
[INFO ] [MTD ] Read event from </dev/input/event7>
[INFO ] [ProbeSysfs ] device match: /dev/input/event4
[INFO ] [MTD ] Read event from </dev/input/event4>
[INFO ] [Base ] Start application main loop
[WARNING] [MTD ] Unable to open device "/dev/input/event7". Please ensure you have the appropriate permissions.
[WARNING] [MTD ] Unable to open device "/dev/input/event4". Please ensure you have the appropriate permissions.
False
[INFO ] [GL ] NPOT texture support is available
True
True
True
True
错误：
[ERROR ] [Image ] Error loading texture somevideo.mpg
实际结果：
- 出现错误，我无法使用除
play() 之外的任何属性
参考代码：
from functools import partial
from kivy.clock import Clock
from kivy.uix.video import Video
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.screenmanager import Screen, ScreenManager
from kivy.app import App
class VideoPlayScreen(Screen):
def __init__(self, **kwargs):
super(VideoPlayScreen, self).__init__(**kwargs)
box_layout = BoxLayout()
self.video1 = Video(source="cityCC0.mpg")
box_layout.add_widget(self.video1)
self.add_widget(box_layout)
def on_enter(self, *args):
print(self.video1.state)
self.video1.state = "play"
print(self.video1.state)
Clock.schedule_interval(partial(print, self.video1.loaded), 0.5)
sm = ScreenManager()
sm.add_widget(VideoPlayScreen(name="video_play"))
sm.current = "video_play"
class OpenCity(App):
def build(self):
return sm
if __name__ == '__main__':
OpenCity().run()
cityCC1.mpg是kivy给的。在 kivy_examples 文件夹中检查它。
运行日志：
[INFO ] [Logger ] Record log in C:\Users\kanna\.kivy\logs\kivy_20-03-01_28.txt
[INFO ] [deps ] Successfully imported "kivy_deps.gstreamer" 0.2.0
[INFO ] [deps ] Successfully imported "kivy_deps.glew" 0.2.0
[INFO ] [deps ] Successfully imported "kivy_deps.sdl2" 0.1.23
[INFO ] [Kivy ] v1.11.1
[INFO ] [Kivy ] Installed at "F:\Python Kivy\lib\site-packages\kivy\__init__.py"
[INFO ] [Python ] v3.7.6 (tags/v3.7.6:43364a7ae0, Dec 18 2019, 23:46:00) [MSC v.1916 32 bit (Intel)]
[INFO ] [Python ] Interpreter at "F:\Python Kivy\Scripts\python.exe"
[INFO ] [Factory ] 184 symbols loaded
[INFO ] [ImageLoaderFFPy] Using ffpyplayer 4.3.0
[INFO ] [Image ] Providers: img_tex, img_dds, img_sdl2, img_ffpyplayer, img_gif (img_pil ignored)
[INFO ] [VideoGstplayer] Using Gstreamer 1.16.2.0
[INFO ] [Video ] Provider: gstplayer
[INFO ] [Window ] Provider: sdl2
[INFO ] [GL ] Using the "OpenGL" graphics system
[INFO ] [GL ] GLEW initialization succeeded
[INFO ] [GL ] Backend used <glew>
[INFO ] [GL ] OpenGL version <b'4.6.0 - Build 26.20.100.7262'>
[INFO ] [GL ] OpenGL vendor <b'Intel'>
[INFO ] [GL ] OpenGL renderer <b'Intel(R) UHD Graphics 630'>
[INFO ] [GL ] OpenGL parsed version: 4, 6
[INFO ] [GL ] Shading version <b'4.60 - Build 26.20.100.7262'>
[INFO ] [GL ] Texture max size <16384>
[INFO ] [GL ] Texture max units <32>
[INFO ] [Window ] auto add sdl2 input provider
[INFO ] [Window ] virtual keyboard not allowed, single mode, not docked
[ERROR ] [Image ] Error loading texture cityCC0.mpg
[INFO ] [Base ] Start application main loop
stop
play
False 0.9090554999999999
[INFO ] [GL ] NPOT texture support is available
False 0.5063968000000001
False 0.4993861999999998
False 0.49537330000000024
[INFO ] [WindowSDL ] exiting mainloop and closing.
[INFO ] [Base ] Leaving application in progress...
它将 运行 日志显示为代码。
一如既往地感谢阅读。
此后的问题将 link 发送到包含代码日志的 pastebin。
根据 documentation、partial
“freezes” some portion of a function’s arguments
因此 partial 中的 print 函数只是打印 self.video1.loaded 的值，就像调用 partial 函数时一样。
这是您发布的代码的一个版本，它每半秒打印一次 loaded 的当前版本：
from kivy.clock import Clock
from kivy.uix.video import Video
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.screenmanager import Screen, ScreenManager
from kivy.app import App
class VideoPlayScreen(Screen):
def __init__(self, **kwargs):
super(VideoPlayScreen, self).__init__(**kwargs)
box_layout = BoxLayout()
self.video1 = Video(source="cityCC0.mpg")
box_layout.add_widget(self.video1)
self.add_widget(box_layout)
def on_enter(self, *args):
print(self.video1.state)
self.video1.state = "play"
print(self.video1.state)
Clock.schedule_interval(self.check_loaded, 0.5)
def check_loaded(self, dt):
print(self.video1.loaded)
sm = ScreenManager()
sm.add_widget(VideoPlayScreen(name="video_play"))
sm.current = "video_play"
class OpenCity(App):
def build(self):
return sm
if __name__ == '__main__':
OpenCity().run()
结果输出：
[ERROR ] [Image ] Error loading texture cityCC0.mpg
stop
play
[INFO ] [ProbeSysfs ] device match: /dev/input/event7
[INFO ] [MTD ] Read event from </dev/input/event7>
[INFO ] [ProbeSysfs ] device match: /dev/input/event4
[INFO ] [MTD ] Read event from </dev/input/event4>
[INFO ] [Base ] Start application main loop
[WARNING] [MTD ] Unable to open device "/dev/input/event7". Please ensure you have the appropriate permissions.
[WARNING] [MTD ] Unable to open device "/dev/input/event4". Please ensure you have the appropriate permissions.
False
[INFO ] [GL ] NPOT texture support is available
True
True
True
True