376 lines
12 KiB
Python
376 lines
12 KiB
Python
import sys
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import os
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import subprocess
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from pathlib import Path
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from PyQt6.QtWidgets import (
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QApplication, QMainWindow, QWidget, QVBoxLayout, QHBoxLayout,
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QLabel, QPushButton, QLineEdit, QFileDialog, QFrame, QStatusBar,
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)
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from PyQt6.QtCore import Qt, QThread, QTimer, pyqtSignal
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from PyQt6.QtGui import QPainter, QColor, QPen, QDragEnterEvent, QDropEvent
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import mpv
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def build_export_path(folder: str, basename: str, counter: int) -> str:
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filename = f"{basename}_{counter:03d}.mp4"
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return os.path.join(folder, filename)
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def format_time(seconds: float) -> str:
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m = int(seconds // 60)
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# Floor-truncate to 1 dp (not round) — prevents "X:60.0" rollover when
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# seconds is e.g. 59.95. This means display may lag true position by up to 0.1s.
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s = int(seconds % 60 * 10) / 10
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return f"{m}:{s:04.1f}"
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def build_ffmpeg_command(input_path: str, start: float, output_path: str) -> list[str]:
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# -ss before -i: fast input-seeking. Safe here because we always re-encode
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# (libx264/aac), so there is no keyframe-alignment issue from pre-input seek.
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return [
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"ffmpeg", "-y",
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"-ss", str(start),
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"-i", input_path,
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"-t", "8",
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"-c:v", "libx264",
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"-c:a", "aac",
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output_path,
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]
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class ExportWorker(QThread):
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finished = pyqtSignal(str) # output path
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error = pyqtSignal(str) # error message
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def __init__(self, input_path: str, start: float, output_path: str):
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super().__init__()
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self._input = input_path
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self._start = start
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self._output = output_path
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def run(self):
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cmd = build_ffmpeg_command(self._input, self._start, self._output)
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try:
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result = subprocess.run(cmd, capture_output=True, text=True, timeout=120)
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if result.returncode == 0:
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self.finished.emit(self._output)
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else:
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self.error.emit(result.stderr[-500:])
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except FileNotFoundError:
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self.error.emit("ffmpeg not found — is it installed and on PATH?")
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except Exception as e:
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self.error.emit(str(e))
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class TimelineWidget(QWidget):
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cursor_changed = pyqtSignal(float) # emits position in seconds
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def __init__(self):
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super().__init__()
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self.setMinimumHeight(40)
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self.setMouseTracking(True)
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self._duration = 0.0
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self._cursor = 0.0
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def set_duration(self, duration: float):
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self._duration = duration
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self._cursor = 0.0
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self.update()
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def set_cursor(self, seconds: float):
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self._cursor = max(0.0, min(seconds, max(0.0, self._duration - 8.0)))
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self.update()
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def _pos_to_time(self, x: int) -> float:
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if self._duration <= 0 or self.width() <= 0:
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return 0.0
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ratio = max(0.0, min(1.0, x / self.width()))
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return ratio * self._duration
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def paintEvent(self, event):
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p = QPainter(self)
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try:
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w, h = self.width(), self.height()
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# Background
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p.fillRect(0, 0, w, h, QColor(30, 30, 30))
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if self._duration <= 0:
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return
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# 8s selection highlight
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x_start = int(self._cursor / self._duration * w)
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x_end = int(min(self._cursor + 8.0, self._duration) / self._duration * w)
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p.fillRect(x_start, 0, x_end - x_start, h, QColor(60, 120, 200, 120))
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# Cursor line
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pen = QPen(QColor(255, 200, 0))
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pen.setWidth(2)
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p.setPen(pen)
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p.drawLine(x_start, 0, x_start, h)
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finally:
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p.end()
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def mousePressEvent(self, event):
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self._seek(event.position().x())
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def mouseMoveEvent(self, event):
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if event.buttons():
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self._seek(event.position().x())
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def _seek(self, x: float):
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t = self._pos_to_time(int(x))
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self.set_cursor(t)
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self.cursor_changed.emit(self._cursor)
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class MpvWidget(QFrame):
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file_loaded = pyqtSignal() # emitted (on Qt thread) when a file is ready
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def __init__(self):
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super().__init__()
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self.setMinimumSize(640, 360)
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self.setStyleSheet("background: black;")
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# Required so Qt creates a real native window handle for mpv to embed into.
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# Without these, mpv opens a separate window instead of embedding.
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self.setAttribute(Qt.WidgetAttribute.WA_NativeWindow, True)
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self.setAttribute(Qt.WidgetAttribute.WA_PaintOnScreen, True)
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self._player = None
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def _init_player(self):
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if self._player is not None:
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return
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self._player = mpv.MPV(
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wid=str(int(self.winId())),
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keep_open=True,
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pause=True,
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)
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# mpv fires events on its own thread; bounce to Qt thread via QTimer.
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@self._player.event_callback("file-loaded")
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def _on_file_loaded(event):
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QTimer.singleShot(0, self.file_loaded.emit)
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def load(self, path: str):
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self._init_player()
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self._player.play(path)
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def seek(self, t: float):
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if self._player:
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self._player.pause = True
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self._player.seek(t, "absolute")
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def play_loop(self, a: float, b: float):
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if self._player:
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self._player["ab-loop-a"] = a
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self._player["ab-loop-b"] = b
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self._player.pause = False
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def stop_loop(self):
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if self._player:
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# ab-loop-a/b are numeric properties — setting to "no" via dict
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# accessor throws TypeError. Disable loop via ab_loop_count instead.
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self._player.ab_loop_count = 0
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self._player.pause = True
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def get_duration(self) -> float:
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if self._player:
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d = self._player.duration
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return d if d else 0.0
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return 0.0
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def closeEvent(self, event):
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if self._player:
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self._player.terminate()
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super().closeEvent(event)
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def main():
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app = QApplication(sys.argv)
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win = MainWindow()
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win.show()
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sys.exit(app.exec())
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class MainWindow(QMainWindow):
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def __init__(self):
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super().__init__()
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self.setWindowTitle("8-cut")
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self.resize(900, 680)
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self.setAcceptDrops(True)
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# State
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self._file_path: str = ""
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self._cursor: float = 0.0
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self._export_counter: int = 1
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self._export_worker: ExportWorker | None = None
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# Widgets
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self._mpv = MpvWidget()
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self._mpv.file_loaded.connect(self._after_load)
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self._timeline = TimelineWidget()
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self._timeline.cursor_changed.connect(self._on_cursor_changed)
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self._lbl_file = QLabel("Drop a video file here")
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self._lbl_file.setAlignment(Qt.AlignmentFlag.AlignCenter)
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self._lbl_file.setStyleSheet("color: #aaa; padding: 6px;")
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self._btn_play = QPushButton("▶ Play 8s")
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self._btn_play.setEnabled(False)
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self._btn_play.clicked.connect(self._on_play)
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self._btn_pause = QPushButton("⏸ Pause")
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self._btn_pause.setEnabled(False)
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self._btn_pause.clicked.connect(self._on_pause)
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self._lbl_cursor = QLabel("cursor: --")
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self._lbl_duration = QLabel("dur: --")
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self._txt_name = QLineEdit("clip")
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self._txt_name.setPlaceholderText("base name")
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self._txt_name.setMaximumWidth(150)
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self._txt_name.textChanged.connect(self._reset_counter)
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self._txt_folder = QLineEdit(str(Path.home()))
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self._btn_folder = QPushButton("Browse")
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self._btn_folder.clicked.connect(self._pick_folder)
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self._lbl_next = QLabel()
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self._update_next_label()
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self._btn_export = QPushButton("Export")
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self._btn_export.setEnabled(False)
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self._btn_export.clicked.connect(self._on_export)
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# Layout
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top_bar = QHBoxLayout()
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top_bar.addWidget(self._lbl_file, stretch=1)
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controls = QHBoxLayout()
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controls.addWidget(self._btn_play)
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controls.addWidget(self._btn_pause)
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controls.addStretch()
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controls.addWidget(self._lbl_cursor)
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controls.addWidget(self._lbl_duration)
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export_row = QHBoxLayout()
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export_row.addWidget(QLabel("Name:"))
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export_row.addWidget(self._txt_name)
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export_row.addWidget(QLabel("Folder:"))
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export_row.addWidget(self._txt_folder, stretch=1)
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export_row.addWidget(self._btn_folder)
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export_row.addWidget(self._lbl_next)
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export_row.addWidget(self._btn_export)
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root = QVBoxLayout()
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root.addLayout(top_bar)
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root.addWidget(self._mpv, stretch=1)
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root.addWidget(self._timeline)
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root.addLayout(controls)
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root.addLayout(export_row)
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container = QWidget()
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container.setLayout(root)
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self.setCentralWidget(container)
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self.setStatusBar(QStatusBar())
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# --- Drag & Drop ---
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def dragEnterEvent(self, event: QDragEnterEvent):
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if event.mimeData().hasUrls():
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event.acceptProposedAction()
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def dropEvent(self, event: QDropEvent):
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urls = event.mimeData().urls()
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if urls:
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path = urls[0].toLocalFile()
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self._load_file(path)
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def _load_file(self, path: str):
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self._file_path = path
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self._lbl_file.setText(os.path.basename(path))
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self._mpv.load(path)
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# _after_load is triggered by MpvWidget.file_loaded signal (connected in __init__)
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def _after_load(self):
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dur = self._mpv.get_duration()
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self._timeline.set_duration(dur)
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self._cursor = 0.0
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self._lbl_duration.setText(f"dur: {format_time(dur)}")
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self._lbl_cursor.setText(f"cursor: {format_time(0.0)}")
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self._btn_play.setEnabled(True)
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self._btn_pause.setEnabled(True)
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self._btn_export.setEnabled(True)
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# --- Playback ---
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def _on_cursor_changed(self, t: float):
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self._cursor = t
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self._lbl_cursor.setText(f"cursor: {format_time(t)}")
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self._mpv.seek(t)
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def _on_play(self):
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if not self._file_path:
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return
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self._mpv.play_loop(self._cursor, self._cursor + 8.0)
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def _on_pause(self):
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self._mpv.stop_loop()
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self._mpv.seek(self._cursor)
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# --- Export ---
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def _pick_folder(self):
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folder = QFileDialog.getExistingDirectory(self, "Select output folder")
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if folder:
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self._txt_folder.setText(folder)
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self._reset_counter()
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def _reset_counter(self):
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# Counter resets to 1 when name or folder changes. ffmpeg's -y flag
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# will silently overwrite if the same name+folder is reused later.
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self._export_counter = 1
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self._update_next_label()
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def _update_next_label(self):
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path = build_export_path(
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self._txt_folder.text(),
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self._txt_name.text() or "clip",
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self._export_counter,
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)
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self._lbl_next.setText(f"→ {os.path.basename(path)}")
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def _on_export(self):
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if not self._file_path:
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return
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if self._export_worker and self._export_worker.isRunning():
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self.statusBar().showMessage("Export already running…")
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return
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output = build_export_path(
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self._txt_folder.text(),
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self._txt_name.text() or "clip",
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self._export_counter,
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)
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self._btn_export.setEnabled(False)
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self.statusBar().showMessage(f"Exporting {os.path.basename(output)}…")
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self._export_worker = ExportWorker(self._file_path, self._cursor, output)
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self._export_worker.finished.connect(self._on_export_done)
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self._export_worker.error.connect(self._on_export_error)
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self._export_worker.start()
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def _on_export_done(self, path: str):
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self._export_counter += 1
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self._update_next_label()
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self._btn_export.setEnabled(True)
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self.statusBar().showMessage(f"Exported: {os.path.basename(path)}")
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def _on_export_error(self, msg: str):
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self._btn_export.setEnabled(True)
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self.statusBar().showMessage(f"Export error: {msg}")
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if __name__ == "__main__":
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main()
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