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 on_start_recording(_: Gtk.Button, stack: Gtk.Stack) -> None:
  78     global recording  # pylint: disable=global-statement
  79     assert recording is None
  80
  81     filename = make_filename()
  82     size_display = find_size_display(stack)
  83
  84     def update_size_display() -> Any:
  85         try:
  86             size = summarize_size(os.stat(filename).st_size)
  87         except FileNotFoundError:
  88             size = '--'
  89         size_display.set_label(f'<big>{size}</big>')
  90         return GLib.SOURCE_REMOVE if recording is None else GLib.SOURCE_CONTINUE
  91     GLib.timeout_add_seconds(1, update_size_display)
  92
  93     recording = Stream.start(
  94         ['ffmpeg', '-framerate', '25'] + video_source(stack) +
  95         ['-f', 'pulse', '-ac', '2', '-i', 'default', filename])
  96     stack.set_visible_child_name("recording")
  97
  98
  99 def on_stop_recording(_: Gtk.Button, stack: Gtk.Stack) -> None:
 100     global recording  # pylint: disable=global-statement
 101     assert recording is not None
 102     recording.stop()
 103     recording = None
 104     stack.set_visible_child_name("not_recording")
 105
 106
 107 def make_button(label: str, action: Callable[[
 108                 Gtk.Button, Gtk.Stack], None], stack: Gtk.Stack) -> Gtk.Button:
 109     button = Gtk.Button(label=label)
 110     button.connect('clicked', action, stack)
 111     button.set_margin_top(10)
 112     button.set_margin_start(10)
 113     button.set_margin_end(10)
 114     button.set_margin_bottom(10)
 115     return button
 116
 117
 118 def make_share_control() -> Gtk.CheckButton:
 119     can_share = os.path.exists('/sys/module/v4l2loopback')
 120     control = Gtk.CheckButton(
 121         label='Share Webcam', sensitive=can_share, active=can_share)
 122     control.set_margin_start(20)
 123     return control
 124
 125
 126 def on_activate(app: Gtk.Application) -> None:
 127     win = Gtk.ApplicationWindow(application=app)
 128     win.set_title('SRec')
 129     win.set_icon_name('srec')
 130
 131     stack = Gtk.Stack()
 132
 133     nr_box = Gtk.Box()
 134     nr_box.set_orientation(Gtk.Orientation.VERTICAL)
 135     screen = Gtk.CheckButton(label='Screen')
 136     nr_box.append(screen)
 137     nr_box.append(Gtk.CheckButton(label='Webcam', active=True, group=screen))
 138     nr_box.append(make_share_control())
 139     nr_box.append(make_button("Start Recording", on_start_recording, stack))
 140     stack.add_named(nr_box, "not_recording")
 141
 142     r_box = Gtk.Box()
 143     r_box.set_orientation(Gtk.Orientation.VERTICAL)
 144     r_box.append(make_button("Stop Recording", on_stop_recording, stack))
 145     r_box.append(Gtk.Label(use_markup=True, justify=Gtk.Justification.CENTER))
 146     stack.add_named(r_box, "recording")
 147
 148     win.set_child(stack)
 149     win.present()
 150
 151
 152 def main() -> None:
 153     app = Gtk.Application(application_id='net.chkno.srec')
 154     app.connect('activate', on_activate)
 155     app.run(None)
 156
 157
 158 if __name__ == '__main__':
 159     main()