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 __future__ import annotations
   8
   9 from dataclasses import dataclass
  10 from datetime import datetime
  11 import os
  12 import subprocess
  13 import sys
  14 from typing import Any, Callable
  15
  16 import gi
  17 gi.require_version("Gtk", "4.0")
  18 gi.require_version("GLib", "2.0")
  19
  20 from gi.repository import Gtk   # nopep8 pylint: disable=wrong-import-position
  21 from gi.repository import GLib  # nopep8 pylint: disable=wrong-import-position
  22
  23
  24 @dataclass
  25 class Stream:
  26     process: subprocess.Popen[bytes]
  27
  28     @staticmethod
  29     def start(command: list[str]) -> Stream:
  30         # pylint: disable=consider-using-with
  31         return Stream(process=subprocess.Popen(command, stdin=subprocess.PIPE))
  32
  33     def stop(self) -> None:
  34         stdin = self.process.stdin
  35         assert stdin is not None
  36         try:
  37             stdin.write(b'q')
  38             stdin.flush()
  39         except BrokenPipeError:
  40             print("Stream already stopped?", file=sys.stderr)
  41         self.process.wait()
  42
  43
  44 recording: Stream | None = None
  45
  46
  47 def make_filename() -> str:
  48     directory = os.environ.get(
  49         'XDG_VIDEOS_DIR',
  50         os.path.expanduser('~/Videos/SRec'))
  51     os.makedirs(directory, exist_ok=True)
  52     timestamp = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
  53     return os.path.join(directory, f'srec {timestamp}.mkv')
  54
  55
  56 def video_source(stack: Gtk.Stack) -> list[str]:
  57     if stack.get_child_by_name('not_recording').get_first_child().get_active():
  58         return ['-f', 'x11grab', '-i', ':0.0+0,0']
  59     return ['-f', 'v4l2', '-i', '/dev/video0']
  60
  61
  62 def find_size_display(stack: Gtk.Stack) -> Gtk.Label:
  63     return stack.get_child_by_name(
  64         'recording').get_first_child().get_next_sibling()
  65
  66
  67 def summarize_size(n: int) -> str:
  68     if n > 100_000_000:
  69         m = int(n / (1024 * 1024))
  70         return f'{m}M'
  71     if n > 100_000:
  72         k = int(n / 1024)
  73         return f'{k}K'
  74     return str(n)
  75
  76
  77 def begin_monitoring_file_size(size_display: Gtk.Label, filename: str) -> None:
  78     def update_size_display() -> Any:
  79         done = recording is None
  80         if done:
  81             size_display.set_label('')
  82         else:
  83             try:
  84                 size = summarize_size(os.stat(filename).st_size)
  85             except FileNotFoundError:
  86                 size = '--'
  87             size_display.set_label(f'<big>{size}</big>')
  88         return GLib.SOURCE_REMOVE if done else GLib.SOURCE_CONTINUE
  89     GLib.timeout_add_seconds(1, update_size_display)
  90
  91
  92 def on_start_recording(_: Gtk.Button, stack: Gtk.Stack) -> None:
  93     global recording  # pylint: disable=global-statement
  94     assert recording is None
  95
  96     filename = make_filename()
  97     begin_monitoring_file_size(find_size_display(stack), filename)
  98
  99     recording = Stream.start(
 100         ['ffmpeg', '-framerate', '25'] + video_source(stack) +
 101         ['-f', 'pulse', '-ac', '2', '-i', 'default', filename])
 102     stack.set_visible_child_name("recording")
 103
 104
 105 def on_stop_recording(_: Gtk.Button, stack: Gtk.Stack) -> None:
 106     global recording  # pylint: disable=global-statement
 107     assert recording is not None
 108     recording.stop()
 109     recording = None
 110     stack.set_visible_child_name("not_recording")
 111
 112
 113 def make_button(label: str, action: Callable[[
 114                 Gtk.Button, Gtk.Stack], None], stack: Gtk.Stack) -> Gtk.Button:
 115     button = Gtk.Button(label=label)
 116     button.connect('clicked', action, stack)
 117     button.set_margin_top(10)
 118     button.set_margin_start(10)
 119     button.set_margin_end(10)
 120     button.set_margin_bottom(10)
 121     return button
 122
 123
 124 def make_share_control() -> Gtk.CheckButton:
 125     can_share = os.path.exists('/sys/module/v4l2loopback')
 126     control = Gtk.CheckButton(
 127         label='Share Webcam', sensitive=can_share, active=can_share)
 128     control.set_margin_start(20)
 129     return control
 130
 131
 132 def on_activate(app: Gtk.Application) -> None:
 133     win = Gtk.ApplicationWindow(application=app)
 134     win.set_title('SRec')
 135     win.set_icon_name('srec')
 136
 137     stack = Gtk.Stack()
 138
 139     nr_box = Gtk.Box()
 140     nr_box.set_orientation(Gtk.Orientation.VERTICAL)
 141     screen = Gtk.CheckButton(label='Screen')
 142     nr_box.append(screen)
 143     nr_box.append(Gtk.CheckButton(label='Webcam', active=True, group=screen))
 144     nr_box.append(make_share_control())
 145     nr_box.append(make_button("Start Recording", on_start_recording, stack))
 146     stack.add_named(nr_box, "not_recording")
 147
 148     r_box = Gtk.Box()
 149     r_box.set_orientation(Gtk.Orientation.VERTICAL)
 150     r_box.append(make_button("Stop Recording", on_stop_recording, stack))
 151     r_box.append(Gtk.Label(use_markup=True, justify=Gtk.Justification.CENTER))
 152     stack.add_named(r_box, "recording")
 153
 154     win.set_child(stack)
 155     win.present()
 156
 157
 158 def main() -> None:
 159     app = Gtk.Application(application_id='net.chkno.srec')
 160     app.connect('activate', on_activate)
 161     app.run(None)
 162
 163
 164 if __name__ == '__main__':
 165     main()