425 lines
14 KiB
Python
425 lines
14 KiB
Python
import os
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import sys
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import glob
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import cv2
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import argparse
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import shutil
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import time
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from pathlib import Path
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from typing import List
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class MediaGrader:
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# Configuration constants
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BASE_FRAME_DELAY_MS = 33 # ~30 FPS
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KEY_REPEAT_RATE_SEC = 0.5 # How often to process key repeats
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FAST_SEEK_ACTIVATION_TIME = 0.5 # How long to hold before fast seek
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FRAME_RENDER_TIME_MS = 50 # Time to let frames render between seeks
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SPEED_INCREMENT = 0.1
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MIN_PLAYBACK_SPEED = 0.1
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MAX_PLAYBACK_SPEED = 100.0
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FAST_SEEK_MULTIPLIER = 5
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IMAGE_DISPLAY_DELAY_MS = 100
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def __init__(
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self, directory: str, seek_frames: int = 30, snap_to_iframe: bool = False
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):
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self.directory = Path(directory)
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self.seek_frames = seek_frames
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self.current_index = 0
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self.playback_speed = 1.0
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self.media_files = []
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self.current_cap = None
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self.is_playing = True
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self.current_frame = 0
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self.total_frames = 0
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# Key repeat tracking with rate limiting
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self.last_seek_time = 0
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self.current_seek_key = None
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self.key_first_press_time = 0
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self.is_seeking = False
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# Seeking modes
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self.fine_seek_frames = 1 # Frame-by-frame
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self.coarse_seek_frames = self.seek_frames # User-configurable
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self.fast_seek_frames = self.seek_frames * self.FAST_SEEK_MULTIPLIER
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# Current frame cache for display
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self.current_display_frame = None
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# Supported media extensions
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self.extensions = [
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".png",
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".jpg",
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".jpeg",
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".gif",
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".mp4",
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".avi",
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".mov",
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".mkv",
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]
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# Create grade directories
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for i in range(1, 6):
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grade_dir = self.directory / str(i)
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grade_dir.mkdir(exist_ok=True)
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def find_media_files(self) -> List[Path]:
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"""Find all media files recursively in the directory"""
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media_files = []
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for ext in self.extensions:
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pattern = str(self.directory / "**" / f"*{ext}")
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files = glob.glob(pattern, recursive=True)
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media_files.extend([Path(f) for f in files])
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# Filter out files already in grade directories
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filtered_files = []
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for file in media_files:
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# Check if file is not in a grade directory (1-5)
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if not any(part in ["1", "2", "3", "4", "5"] for part in file.parts):
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filtered_files.append(file)
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return sorted(filtered_files)
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def is_video(self, file_path: Path) -> bool:
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"""Check if file is a video"""
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return file_path.suffix.lower() in self.extensions
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def calculate_frame_delay(self) -> int:
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"""Calculate frame delay in milliseconds based on playback speed"""
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delay_ms = int(self.BASE_FRAME_DELAY_MS / self.playback_speed)
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return max(1, delay_ms)
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def calculate_frames_to_skip(self) -> int:
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"""Calculate how many frames to skip for high-speed playback"""
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if self.playback_speed <= 1.0:
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return 0
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elif self.playback_speed <= 2.0:
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return 0
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elif self.playback_speed <= 5.0:
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return int(self.playback_speed - 1)
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else:
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return int(self.playback_speed * 2)
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def load_media(self, file_path: Path) -> bool:
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"""Load media file for display"""
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if self.current_cap:
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self.current_cap.release()
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if self.is_video(file_path):
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self.current_cap = cv2.VideoCapture(str(file_path))
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if not self.current_cap.isOpened():
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return False
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self.total_frames = int(self.current_cap.get(cv2.CAP_PROP_FRAME_COUNT))
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self.current_frame = 0
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else:
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self.current_cap = None
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self.total_frames = 1
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self.current_frame = 0
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# Load initial frame
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self.load_current_frame()
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return True
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def load_current_frame(self):
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"""Load the current frame into display cache"""
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if self.is_video(self.media_files[self.current_index]):
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if not self.current_cap:
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return False
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ret, frame = self.current_cap.read()
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if ret:
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self.current_display_frame = frame
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self.current_frame = int(self.current_cap.get(cv2.CAP_PROP_POS_FRAMES))
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return True
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return False
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else:
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frame = cv2.imread(str(self.media_files[self.current_index]))
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if frame is not None:
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self.current_display_frame = frame
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return True
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return False
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def display_current_frame(self):
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"""Display the current cached frame with overlays"""
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if self.current_display_frame is None:
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return
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frame = self.current_display_frame.copy()
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# Add info overlay
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current_file = self.media_files[self.current_index]
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info_text = f"Speed: {self.playback_speed:.1f}x | Frame: {self.current_frame}/{self.total_frames} | File: {self.current_index + 1}/{len(self.media_files)} | {'Playing' if self.is_playing else 'PAUSED'}"
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cv2.putText(
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frame,
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info_text,
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(10, 30),
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cv2.FONT_HERSHEY_SIMPLEX,
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0.7,
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(255, 255, 255),
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2,
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)
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cv2.putText(
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frame, info_text, (10, 30), cv2.FONT_HERSHEY_SIMPLEX, 0.7, (0, 0, 0), 1
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)
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cv2.imshow("Media Grader", frame)
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def advance_frame(self):
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"""Advance to next frame(s) based on playback speed"""
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if (
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not self.is_video(self.media_files[self.current_index])
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or not self.is_playing
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):
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return
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frames_to_skip = self.calculate_frames_to_skip()
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for _ in range(frames_to_skip + 1):
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ret, frame = self.current_cap.read()
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if not ret:
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return False
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self.current_display_frame = frame
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self.current_frame = int(self.current_cap.get(cv2.CAP_PROP_POS_FRAMES))
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return True
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def seek_video(self, frames_delta: int):
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"""Seek video by specified number of frames"""
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if not self.current_cap or not self.is_video(
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self.media_files[self.current_index]
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):
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return
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target_frame = max(
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0, min(self.current_frame + frames_delta, self.total_frames - 1)
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)
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self.current_cap.set(cv2.CAP_PROP_POS_FRAMES, target_frame)
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self.load_current_frame()
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def process_seek_key(self, key: int) -> bool:
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"""Process seeking keys with proper rate limiting"""
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current_time = time.time()
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seek_direction = 0
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seek_amount = 0
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if key == ord("a"):
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seek_direction = -1
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elif key == ord("d"):
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seek_direction = 1
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elif key == ord(","):
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seek_amount = -self.fine_seek_frames
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elif key == ord("."):
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seek_amount = self.fine_seek_frames
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else:
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if self.current_seek_key is not None:
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self.current_seek_key = None
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self.is_seeking = False
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return False
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# Handle fine seeking (comma/period) - always immediate
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if seek_amount != 0:
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self.seek_video(seek_amount)
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return True
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# Handle arrow key seeking with rate limiting
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if seek_direction != 0:
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if self.current_seek_key != key:
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self.current_seek_key = key
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self.key_first_press_time = current_time
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self.last_seek_time = current_time
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self.is_seeking = True
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seek_amount = seek_direction * self.coarse_seek_frames
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self.seek_video(seek_amount)
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return True
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elif self.is_seeking:
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time_since_last_seek = current_time - self.last_seek_time
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time_held = current_time - self.key_first_press_time
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if time_since_last_seek >= self.KEY_REPEAT_RATE_SEC:
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self.last_seek_time = current_time
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if time_held > self.FAST_SEEK_ACTIVATION_TIME:
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seek_amount = seek_direction * self.fast_seek_frames
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else:
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seek_amount = seek_direction * self.coarse_seek_frames
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self.seek_video(seek_amount)
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return True
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return False
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def grade_media(self, grade: int):
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"""Move current media file to grade directory"""
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if not self.media_files or grade < 1 or grade > 5:
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return
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current_file = self.media_files[self.current_index]
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grade_dir = self.directory / str(grade)
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destination = grade_dir / current_file.name
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counter = 1
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while destination.exists():
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stem = current_file.stem
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suffix = current_file.suffix
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destination = grade_dir / f"{stem}_{counter}{suffix}"
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counter += 1
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try:
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shutil.move(str(current_file), str(destination))
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print(f"Moved {current_file.name} to grade {grade}")
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self.media_files.pop(self.current_index)
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if self.current_index >= len(self.media_files):
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self.current_index = 0
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if not self.media_files:
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print("No more media files to grade!")
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return False
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except Exception as e:
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print(f"Error moving file: {e}")
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return True
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def run(self):
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"""Main grading loop"""
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self.media_files = self.find_media_files()
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if not self.media_files:
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print("No media files found in directory!")
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return
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print(f"Found {len(self.media_files)} media files")
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print("Controls:")
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print(" Space: Pause/Play")
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print(" A/D: Seek backward/forward (hold for FAST seek)")
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print(" , / . : Frame-by-frame seek (fine control)")
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print(" W/S: Decrease/Increase playback speed")
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print(" 1-5: Grade and move file")
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print(" N: Next file")
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print(" P: Previous file")
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print(" Q/ESC: Quit")
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cv2.namedWindow("Media Grader", cv2.WINDOW_NORMAL)
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while self.media_files and self.current_index < len(self.media_files):
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current_file = self.media_files[self.current_index]
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if not self.load_media(current_file):
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print(f"Could not load {current_file}")
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self.current_index += 1
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continue
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window_title = f"Media Grader - {current_file.name} ({self.current_index + 1}/{len(self.media_files)})"
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cv2.setWindowTitle("Media Grader", window_title)
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while True:
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self.display_current_frame()
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if self.is_video(current_file):
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if self.is_seeking:
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delay = self.FRAME_RENDER_TIME_MS
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else:
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delay = self.calculate_frame_delay()
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else:
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delay = self.IMAGE_DISPLAY_DELAY_MS
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key = cv2.waitKey(delay) & 0xFF
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if key == ord("q") or key == 27:
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return
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elif key == ord(" "):
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self.is_playing = not self.is_playing
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elif key == ord("w"):
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self.playback_speed = max(
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self.MIN_PLAYBACK_SPEED,
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self.playback_speed - self.SPEED_INCREMENT,
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)
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elif key == ord("s"):
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self.playback_speed = min(
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self.MAX_PLAYBACK_SPEED,
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self.playback_speed + self.SPEED_INCREMENT,
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)
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elif self.process_seek_key(key):
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pass
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elif key == ord("n"):
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break
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elif key == ord("p"):
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self.current_index = max(0, self.current_index - 1)
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break
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elif key in [ord("1"), ord("2"), ord("3"), ord("4"), ord("5")]:
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grade = int(chr(key))
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if not self.grade_media(grade):
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return
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break
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elif key == 255:
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if self.is_seeking and self.current_seek_key is not None:
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self.process_seek_key(self.current_seek_key)
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if (
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self.is_playing
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and self.is_video(current_file)
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and not self.is_seeking
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):
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if not self.advance_frame():
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break
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if key not in [ord("p")]:
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self.current_index += 1
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if self.current_cap:
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self.current_cap.release()
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cv2.destroyAllWindows()
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print("Grading session complete!")
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def main():
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parser = argparse.ArgumentParser(
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description="Media Grader - Grade media files by moving them to numbered folders"
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)
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parser.add_argument(
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"directory",
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nargs="?",
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default=".",
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help="Directory to scan for media files (default: current directory)",
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)
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parser.add_argument(
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"--seek-frames",
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type=int,
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default=30,
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help="Number of frames to seek when using arrow keys (default: 30)",
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)
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parser.add_argument(
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"--snap-to-iframe",
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action="store_true",
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help="Snap to I-frames when seeking backward for better performance",
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)
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args = parser.parse_args()
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if not os.path.isdir(args.directory):
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print(f"Error: {args.directory} is not a valid directory")
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sys.exit(1)
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grader = MediaGrader(args.directory, args.seek_frames, args.snap_to_iframe)
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try:
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grader.run()
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except KeyboardInterrupt:
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print("\nGrading session interrupted")
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except Exception as e:
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print(f"Error: {e}")
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sys.exit(1)
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if __name__ == "__main__":
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main()
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