Загрузка текстуры из MPG

Question

Ошибка:

• [ERROR ] [Image ] Error loading texture somevideo.mpg

Фактический результат:

• Произошла ошибка, и я не могу использовать ни один из атрибутов, кроме play()

Код для справки:

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 предоставлен kivy. Проверьте это в папке kivy_examples.

RunLog:

[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...

Показывает журнал выполнения в виде кода.

Как всегда, спасибо за прочтение.

На вопрос после этого получите ссылку на pastebin с кодом журнала.

Answer 1

В соответствии с документацией , partial

"замораживает" некоторую часть аргументов функции

, чтобы ваш print функция в partial просто печатает значение self.video1.loaded, как это было при вызове функции partial.

Вот версия вашего опубликованного кода, которая печатает текущую версию loaded каждые полсекунды:

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()

и полученный результат:

[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