Quick search

Table Of Contents

Source code for kivy.core.video


Core class for reading video files and managing the video

.. versionchanged:: 1.10.0
    The pyglet, pygst and gi providers have been removed.

.. versionchanged:: 1.8.0
    There are now 2 distinct Gstreamer implementations: one using Gi/Gst
    working for both Python 2+3 with Gstreamer 1.0, and one using PyGST
    working only for Python 2 + Gstreamer 0.10.

.. note::

    Recording is not supported.

__all__ = ('VideoBase', 'Video')

from kivy.clock import Clock
from kivy.core import core_select_lib
from kivy.event import EventDispatcher
from kivy.logger import Logger
from kivy.compat import PY2

[docs]class VideoBase(EventDispatcher): '''VideoBase, a class used to implement a video reader. :Parameters: `filename`: str Filename of the video. Can be a file or an URI. `eos`: str, defaults to 'pause' Action to take when EOS is hit. Can be one of 'pause', 'stop' or 'loop'. .. versionchanged:: unknown added 'pause' `async`: bool, defaults to True Load the video asynchronously (may be not supported by all providers). `autoplay`: bool, defaults to False Auto play the video on init. :Events: `on_eos` Fired when EOS is hit. `on_load` Fired when the video is loaded and the texture is available. `on_frame` Fired when a new frame is written to the texture. ''' __slots__ = ('_wantplay', '_buffer', '_filename', '_texture', '_volume', 'eos', '_state', '_async', '_autoplay') __events__ = ('on_eos', 'on_load', 'on_frame') def __init__(self, **kwargs): kwargs.setdefault('filename', None) kwargs.setdefault('eos', 'stop') kwargs.setdefault('async', True) kwargs.setdefault('autoplay', False) super(VideoBase, self).__init__() self._wantplay = False self._buffer = None self._filename = None self._texture = None self._volume = 1. self._state = '' self._autoplay = kwargs.get('autoplay') self._async = kwargs.get('async') self.eos = kwargs.get('eos') if self.eos == 'pause': Logger.warning("'pause' is deprecated. Use 'stop' instead.") self.eos = 'stop' self.filename = kwargs.get('filename') Clock.schedule_interval(self._update, 1 / 30.) if self._autoplay: self.play() def __del__(self): self.unload() def on_eos(self): pass def on_load(self): pass def on_frame(self): pass def _get_filename(self): return self._filename def _set_filename(self, filename): if filename == self._filename: return self.unload() self._filename = filename if self._filename is None: return self.load() filename = property(lambda self: self._get_filename(), lambda self, x: self._set_filename(x), doc='Get/set the filename/uri of the current video') def _get_position(self): return 0 def _set_position(self, pos): self.seek(pos) position = property(lambda self: self._get_position(), lambda self, x: self._set_position(x), doc='Get/set the position in the video (in seconds)') def _get_volume(self): return self._volume def _set_volume(self, volume): self._volume = volume volume = property(lambda self: self._get_volume(), lambda self, x: self._set_volume(x), doc='Get/set the volume in the video (1.0 = 100%)') def _get_duration(self): return 0 duration = property(lambda self: self._get_duration(), doc='Get the video duration (in seconds)') def _get_texture(self): return self._texture texture = property(lambda self: self._get_texture(), doc='Get the video texture') def _get_state(self): return self._state state = property(lambda self: self._get_state(), doc='Get the video playing status') def _do_eos(self, *args): ''' .. versionchanged:: 1.4.0 Now dispatches the `on_eos` event. ''' if self.eos == 'pause': self.pause() elif self.eos == 'stop': self.stop() elif self.eos == 'loop': self.position = 0 self.play() self.dispatch('on_eos') def _update(self, dt): '''Update the video content to texture. ''' pass
[docs] def seek(self, percent, precise=True): '''Move on percent position''' pass
[docs] def stop(self): '''Stop the video playing''' self._state = ''
[docs] def pause(self): '''Pause the video .. versionadded:: 1.4.0 ''' self._state = 'paused'
[docs] def play(self): '''Play the video''' self._state = 'playing'
[docs] def load(self): '''Load the video from the current filename''' pass
[docs] def unload(self): '''Unload the actual video''' self._state = ''
# Load the appropriate provider video_providers = [] try: from kivy.lib.gstplayer import GstPlayer # NOQA video_providers += [('gstplayer', 'video_gstplayer', 'VideoGstplayer')] except ImportError: pass video_providers += [ ('ffmpeg', 'video_ffmpeg', 'VideoFFMpeg'), ('ffpyplayer', 'video_ffpyplayer', 'VideoFFPy'), ('null', 'video_null', 'VideoNull')] Video = core_select_lib('video', video_providers)