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 import sys
  12 from typing import Any, Callable
  13
  14 import gi
  15 gi.require_version("Gtk", "4.0")
  16 gi.require_version("GLib", "2.0")
  17
  18 from gi.repository import Gtk   # nopep8 pylint: disable=wrong-import-position
  19 from gi.repository import GLib  # nopep8 pylint: disable=wrong-import-position
  20
  21
  22 @dataclass
  23 class Stream:
  24     process: subprocess.Popen[bytes]
  25
  26     def stop(self) -> None:
  27         stdin = self.process.stdin
  28         assert stdin is not None
  29         try:
  30             stdin.write(b'q')
  31             stdin.flush()
  32         except BrokenPipeError:
  33             print("Stream already stopped?", file=sys.stderr)
  34         self.process.wait()
  35
  36
  37 recording: Stream | None = None
  38
  39
  40 def make_filename() -> str:
  41     directory = os.environ.get(
  42         'XDG_VIDEOS_DIR',
  43         os.path.expanduser('~/Videos/SRec'))
  44     os.makedirs(directory, exist_ok=True)
  45     timestamp = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
  46     return os.path.join(directory, f'srec {timestamp}.mkv')
  47
  48
  49 def video_source(stack: Gtk.Stack) -> list[str]:
  50     if stack.get_child_by_name('not_recording').get_first_child().get_active():
  51         return ['-f', 'x11grab', '-i', ':0.0+0,0']
  52     return ['-f', 'v4l2', '-i', '/dev/video0']
  53
  54
  55 def find_size_display(stack: Gtk.Stack) -> Gtk.Label:
  56     return stack.get_child_by_name(
  57         'recording').get_first_child().get_next_sibling()
  58
  59
  60 def summarize_size(n: int) -> str:
  61     if n > 100_000_000:
  62         m = int(n / (1024 * 1024))
  63         return f'{m}M'
  64     if n > 100_000:
  65         k = int(n / 1024)
  66         return f'{k}K'
  67     return str(n)
  68
  69
  70 def on_start_recording(_: Gtk.Button, stack: Gtk.Stack) -> None:
  71     global recording  # pylint: disable=global-statement
  72     assert recording is None
  73
  74     filename = make_filename()
  75     size_display = find_size_display(stack)
  76
  77     def update_size_display() -> Any:
  78         try:
  79             size = summarize_size(os.stat(filename).st_size)
  80         except FileNotFoundError:
  81             size = '--'
  82         size_display.set_label(f'<big>{size}</big>')
  83         return GLib.SOURCE_REMOVE if recording is None else GLib.SOURCE_CONTINUE
  84     GLib.timeout_add_seconds(1, update_size_display)
  85
  86     command = (['ffmpeg', '-framerate', '25'] + video_source(stack) +
  87                ['-f', 'pulse', '-ac', '2', '-i', 'default', filename])
  88     # pylint: disable=consider-using-with
  89     recording = Stream(
  90         process=subprocess.Popen(command, stdin=subprocess.PIPE))
  91     stack.set_visible_child_name("recording")
  92
  93
  94 def on_stop_recording(_: Gtk.Button, stack: Gtk.Stack) -> None:
  95     global recording  # pylint: disable=global-statement
  96     assert recording is not None
  97     recording.stop()
  98     recording = None
  99     stack.set_visible_child_name("not_recording")
 100
 101
 102 def make_button(label: str, action: Callable[[
 103                 Gtk.Button, Gtk.Stack], None], stack: Gtk.Stack) -> Gtk.Button:
 104     button = Gtk.Button(label=label)
 105     button.connect('clicked', action, stack)
 106     button.set_margin_top(10)
 107     button.set_margin_start(10)
 108     button.set_margin_end(10)
 109     button.set_margin_bottom(10)
 110     return button
 111
 112
 113 def make_share_control() -> Gtk.CheckButton:
 114     can_share = os.path.exists('/sys/module/v4l2loopback')
 115     control = Gtk.CheckButton(
 116         label='Share Webcam', sensitive=can_share, active=can_share)
 117     control.set_margin_start(20)
 118     return control
 119
 120
 121 def on_activate(app: Gtk.Application) -> None:
 122     win = Gtk.ApplicationWindow(application=app)
 123     win.set_title('SRec')
 124     win.set_icon_name('srec')
 125
 126     stack = Gtk.Stack()
 127
 128     nr_box = Gtk.Box()
 129     nr_box.set_orientation(Gtk.Orientation.VERTICAL)
 130     screen = Gtk.CheckButton(label='Screen')
 131     nr_box.append(screen)
 132     nr_box.append(Gtk.CheckButton(label='Webcam', active=True, group=screen))
 133     nr_box.append(make_share_control())
 134     nr_box.append(make_button("Start Recording", on_start_recording, stack))
 135     stack.add_named(nr_box, "not_recording")
 136
 137     r_box = Gtk.Box()
 138     r_box.set_orientation(Gtk.Orientation.VERTICAL)
 139     r_box.append(make_button("Stop Recording", on_stop_recording, stack))
 140     r_box.append(Gtk.Label(use_markup=True, justify=Gtk.Justification.CENTER))
 141     stack.add_named(r_box, "recording")
 142
 143     win.set_child(stack)
 144     win.present()
 145
 146
 147 def main() -> None:
 148     app = Gtk.Application(application_id='net.chkno.srec')
 149     app.connect('activate', on_activate)
 150     app.run(None)
 151
 152
 153 if __name__ == '__main__':
 154     main()