git.scottworley.com Git - srec/blob - srec.py

   1 # srec: A simple GUI for screen recording
   2 #
   3 # This program is free software: you can redistribute it and/or modify it
   4 # under the terms of the GNU General Public License as published by the
   5 # Free Software Foundation, version 3.
   6
   7 from dataclasses import dataclass
   8 from datetime import datetime
   9 import os
  10 import subprocess
  11 from typing import Any, Callable
  12
  13 import gi
  14 gi.require_version("Gtk", "4.0")
  15 gi.require_version("GLib", "2.0")
  16
  17 from gi.repository import Gtk   # nopep8 pylint: disable=wrong-import-position
  18 from gi.repository import GLib  # nopep8 pylint: disable=wrong-import-position
  19
  20
  21 @dataclass
  22 class Recording:
  23     process: subprocess.Popen[bytes]
  24
  25     def stop(self) -> None:
  26         stdin = self.process.stdin
  27         assert stdin is not None
  28         stdin.write(b'q')
  29         stdin.flush()
  30         self.process.wait()
  31
  32
  33 recording: Recording | None = None
  34
  35
  36 def make_filename() -> str:
  37     directory = os.environ.get(
  38         'XDG_VIDEOS_DIR',
  39         os.path.expanduser('~/Videos/SRec'))
  40     os.makedirs(directory, exist_ok=True)
  41     timestamp = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
  42     return os.path.join(directory, f'srec {timestamp}.mkv')
  43
  44
  45 def video_source(stack: Gtk.Stack) -> list[str]:
  46     if stack.get_child_by_name('not_recording').get_first_child().get_active():
  47         return ['-f', 'x11grab', '-i', ':0.0+0,0']
  48     return ['-f', 'v4l2', '-i', '/dev/video0']
  49
  50
  51 def find_size_display(stack: Gtk.Stack) -> Gtk.Label:
  52     return stack.get_child_by_name(
  53         'recording').get_first_child().get_next_sibling()
  54
  55
  56 def summarize_size(n: int) -> str:
  57     if n > 100_000_000:
  58         m = int(n / (1024 * 1024))
  59         return f'{m}M'
  60     if n > 100_000:
  61         k = int(n / 1024)
  62         return f'{k}K'
  63     return str(n)
  64
  65
  66 def on_start_recording(_: Gtk.Button, stack: Gtk.Stack) -> None:
  67     global recording  # pylint: disable=global-statement
  68     assert recording is None
  69
  70     filename = make_filename()
  71     size_display = find_size_display(stack)
  72
  73     def update_size_display() -> Any:
  74         try:
  75             size = summarize_size(os.stat(filename).st_size)
  76         except FileNotFoundError:
  77             size = '--'
  78         size_display.set_label(f'<big>{size}</big>')
  79         return GLib.SOURCE_REMOVE if recording is None else GLib.SOURCE_CONTINUE
  80     GLib.timeout_add_seconds(1, update_size_display)
  81
  82     command = (['ffmpeg', '-framerate', '25'] + video_source(stack) +
  83                ['-f', 'pulse', '-ac', '2', '-i', 'default', filename])
  84     # pylint: disable=consider-using-with
  85     recording = Recording(
  86         process=subprocess.Popen(command, stdin=subprocess.PIPE))
  87     stack.set_visible_child_name("recording")
  88
  89
  90 def on_stop_recording(_: Gtk.Button, stack: Gtk.Stack) -> None:
  91     global recording  # pylint: disable=global-statement
  92     assert recording is not None
  93     recording.stop()
  94     recording = None
  95     stack.set_visible_child_name("not_recording")
  96
  97
  98 def make_button(label: str, action: Callable[[
  99                 Gtk.Button, Gtk.Stack], None], stack: Gtk.Stack) -> Gtk.Button:
 100     button = Gtk.Button(label=label)
 101     button.connect('clicked', action, stack)
 102     button.set_margin_top(10)
 103     button.set_margin_start(10)
 104     button.set_margin_end(10)
 105     button.set_margin_bottom(10)
 106     return button
 107
 108
 109 def make_share_control() -> Gtk.CheckButton:
 110     can_share = os.path.exists('/sys/module/v4l2loopback')
 111     control = Gtk.CheckButton(
 112         label='Share Webcam', sensitive=can_share, active=can_share)
 113     control.set_margin_start(20)
 114     return control
 115
 116
 117 def on_activate(app: Gtk.Application) -> None:
 118     win = Gtk.ApplicationWindow(application=app)
 119     win.set_title('SRec')
 120     win.set_icon_name('srec')
 121
 122     stack = Gtk.Stack()
 123
 124     nr_box = Gtk.Box()
 125     nr_box.set_orientation(Gtk.Orientation.VERTICAL)
 126     screen = Gtk.CheckButton(label='Screen')
 127     nr_box.append(screen)
 128     nr_box.append(Gtk.CheckButton(label='Webcam', active=True, group=screen))
 129     nr_box.append(make_share_control())
 130     nr_box.append(make_button("Start Recording", on_start_recording, stack))
 131     stack.add_named(nr_box, "not_recording")
 132
 133     r_box = Gtk.Box()
 134     r_box.set_orientation(Gtk.Orientation.VERTICAL)
 135     r_box.append(make_button("Stop Recording", on_stop_recording, stack))
 136     r_box.append(Gtk.Label(use_markup=True, justify=Gtk.Justification.CENTER))
 137     stack.add_named(r_box, "recording")
 138
 139     win.set_child(stack)
 140     win.present()
 141
 142
 143 def main() -> None:
 144     app = Gtk.Application(application_id='net.chkno.srec')
 145     app.connect('activate', on_activate)
 146     app.run(None)
 147
 148
 149 if __name__ == '__main__':
 150     main()