MP4 Video Does Not Open

[GuzMan2019]

Traceback

File: /usr/share/gaupol/gaupol/agents/video.py
Line: 198
In: _on_load_video_activate

    self.load_video(path)

File: /usr/share/gaupol/gaupol/agents/video.py
Line: 161
In: load_video

    self._init_player_widgets()

File: /usr/share/gaupol/gaupol/agents/video.py
Line: 129
In: _init_player_widgets

    self.player = gaupol.VideoPlayer()

File: /usr/share/gaupol/gaupol/player.py
Line: 74
In: init

    self._init_pipeline()

File: /usr/share/gaupol/gaupol/player.py
Line: 162
In: _init_pipeline

    self.widget.pack_start(sink.props.widget, True, True, 0)

AttributeError: 'NoneType' object has no attribute 'props'

Environment

Platform: Linux-5.4.0-128-generic-i686-athlon-with-LinuxMint-19.3-tricia
Locale: pt_BR.utf_8

Versions

aeidon: 1.3.1
chardet: 3.0.4
enchant: 2.0.0
gaupol: 1.3.1
gstreamer: 1.14.5.0
gtk+: 3.22.30
pygobject: 3.26.1
python: 3.6.9

[Osmo Salomaa]

Duplicate of #83

TL/DR: Install "gstreamer1.0-gtk3".