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annotate doc/libervia-cli/call.rst @ 4282:8da377040ba6

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doc (encryption): update pubsub encryption specifications.
author Goffi <goffi@goffi.org>
date Sat, 13 Jul 2024 17:45:47 +0200
parents be89ab1cbca4
children
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1 .. _libervia-cli_call:
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2
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3 ===============
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4 call: A/V Calls
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5 ===============
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6
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7 ``call`` lets you initiate or receive calls from the terminal.
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8
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9
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10 Common UI
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11 =========
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12
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13 There are various UI available to display a call. By default, one will be automatically
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14 selected according to platform. To select an UI, use the ``--output, -O`` option, with one
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15 of the following value:
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16
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17 default
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18 -------
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19
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20 The default value make a guess on the best output to use on the current platform.
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21
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22 .. note::
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23
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24 For the moment, ``default`` tries ``gui`` first, and fallbacks to ``simple`` if it's
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25 not possible.
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26
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27 simple
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28 ------
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29
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30 During a call, a simple graphical window will be created, displaying your correspondent's
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31 video, with your own video feed in the bottom right corner.
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32
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33 With the UI present (by default), there are 3 buttons:
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34
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35 - one to (un)mute video with the ``v`` key shortcut
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36 - one to (un)mute audio with the ``m`` key shortcut
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37 - one to hang up with the ``h`` key shortcut. ``Ctrl+c`` will also have the same effect.
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38
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39 The following output options can be used:
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40
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41 - **split**: use 2 windows, one for local feedback and the other for remote video, instead of
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42 the default single one with local feedback use with Picture-in-Picture.
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43
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44 - **size=widthxheight**: specify the size of the destination windows (when **split** is
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45 not used). By default, 1280x720 is used.
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46
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47 tui
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48 ---
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49
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50 A Text User Interface can be used; it will then output the video streams directly in the
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51 terminal.
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52
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53 To make it work, you need to have a terminal compatible with at least one image
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54 standard (Kitty, iTerm2, or "block", which uses Unicode half blocks and 24-bit color
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55 escape codes).
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56
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57 The control buttons are the same as for the ``simple`` output.
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58
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59 .. note::
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60
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61 `term-image`_ is used to display images in the terminal. Check its documentation to see
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62 if your terminal is compatible with it (or just try). You can check compatibility at
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63 https://term-image.readthedocs.io/en/stable/start/installation.html#supported-terminal-emulators
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64
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65 .. note::
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66
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67 You need to have installed the ``term-image`` package to make it work. It is the case
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68 if you have used `[TUI]` or `[all]` dependencies during Libervia installation.
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69
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70 .. _term-image: https://term-image.readthedocs.io/en/stable/
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71
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72
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73 The following output options can be used:
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74
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75 - **renderer=RENDERER**: Use a specific renderer. It is case-insensitive and RENDERER can
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76 be one of:
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77
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78 - **auto** (default): selects the best possible renderer automatically
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79 - **block**: uses Unicode half blocks. This option may be less resource-intensive than
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80 other options (but not necessarily, depending on the implementation).
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81 - **iterm2**: iTerm2 image protocol
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82 - **fps**: frames per second to render. It defaults to 25, you can try lower values if
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83 your machine struggles to show images.
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84 - **size**: same as for ``simple`` output, except the default here is 640x380 for
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85 performance reasons.
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86
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87 gui
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88 ---
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89
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90 The ``gui`` option enables a full graphical user interface for handling calls, akin to
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91 other frontends (web, desktop). This GUI provides a comprehensive and interactive
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92 experience for call management directly from your CLI environment, ensuring quick access
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93 to the call feature from the CLI frontend.
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94
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95 This interface is accessible if your system supports X11 or Wayland and requires ``PyQt``
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96 v6 or higher. Here's how to navigate and use the GUI:
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97
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98 .. note::
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99
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100 You need to have installed the ``PyQt6`` package to make it work. It is the case if you
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101 have used `[GUI]` or `[all]` dependencies during Libervia installation.
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102
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103 Call Interface
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104 ^^^^^^^^^^^^^^
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105
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106 The call interface is made with:
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107
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108 - **Video Feeds**: The main window displays the other party's video, with your video in
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109 the bottom right.
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110 - **Fullscreen Mode**: A fullscreen toggle button is located at the top right of the
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111 window.
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112 - **Controls**: The following buttons are available at the bottom of your screen:
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113
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114 - Mute/Unmute video or audio with respective buttons.
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115 - Desktop Sharing.
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116 - Hang up.
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117
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118 Desktop Sharing
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119 ^^^^^^^^^^^^^^^
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120 To share your desktop, you need to be in a supported environment (X11 or Wayland).
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121
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122 For Wayland, you'll need to have the ``xdg-desktop-portal`` package installed, along with
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123 its sibling desktop environment-specific package (e.g., ``xdg-desktop-portal-gtk`` or
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124 ``xdg-desktop-portal-kde``).
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125
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126 Once you've clicked on the desktop sharing button, you'll have to select what you want to
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127 share. It can be your entire screen or a specific application window. On X11, a simple
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128 dialog will appear, while for Wayland, a dialog provided by your environment will ask you
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129 to select what you want to share.
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130
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131 example
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132 -------
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133
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134 Pierre wants to call Louise with a GUI::
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135
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136 $ li call make louise@example.org -O gui
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137
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138 Louise is expecting Pierre call, and will use TUI with the ``block`` renderer to show it::
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139
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140 $ li call receive -a pierre@example.net -O tui --oo renderer=block
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141
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142 make
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143 ====
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144
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145 Make a call. The primary argument is the JID of the entity you wish to call.
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146
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147 example
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148 -------
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149
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150 Pierre wants to call Louise::
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151
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152 $ li call make louise@example.org
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153
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154 receive
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155 =======
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156
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157 Receive a call. By default, you'll see a confirmation prompt when someone is calling; you
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158 can then use ``y`` to accept the call or ``n`` to reject it. Use the ``-a JID,
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159 --auto-accept JID`` option to automatically accept calls from a specific entity (can be
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160 used multiple times), or the ``--auto-accept-all`` to accept any incoming call.
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161
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162 .. note::
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163
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164 Accepting a call automatically activates your webcam and microphone, and shares your IP
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165 address with the caller. Therefore, using ``--auto-accept-all`` is a security risk. Only
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166 use it if you have a very good reason to do so.
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167
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168
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169 examples
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170 --------
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171
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172 Louise is expecting a call. When she receives one, a prompt will ask her to confirm and
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173 start it::
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174
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175 $ li call receive
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176
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177 Piotr has a device with a webcam and microphone for observing wildlife. He set the device
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178 to automatically accept his calls::
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179
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180 $ li call receive -a piotr@example.net
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181
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182 .. note::
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183
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184 Libervia CLI will exit once the first accepted call is terminated. Looping in a shell
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185 may be necessary to call the same device multiple times.
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186
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187 .. note::
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188
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189 Since using auto-accept mode activates the webcam and microphone, consider the privacy
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190 implications and ensure that no one will be filmed or recorded without their consent.
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191