utils.py

import cv2
import numpy as np
from datetime import timedelta
import subprocess

def format_timestamp(seconds):
    """Convert seconds to HH:MM:SS.mmm format"""
    td = timedelta(seconds=seconds)
    hours = td.seconds // 3600
    minutes = (td.seconds % 3600) // 60
    seconds = td.seconds % 60
    milliseconds = round(seconds % 1 * 1000)
    return f"{hours:02d}:{minutes:02d}:{int(seconds):02d}.{milliseconds:03d}"

def parse_timestamp(timestamp):
    """Convert HH:MM:SS.mmm format to seconds"""
    hours, minutes, seconds = timestamp.split(':')
    seconds, milliseconds = seconds.split('.')
    total_seconds = (
        int(hours) * 3600 + 
        int(minutes) * 60 + 
        int(seconds) + 
        int(milliseconds) / 1000
    )
    return total_seconds

def has_audio(video_file):
    """Check if a video file has an audio stream using ffmpeg"""
    cmd = ['ffprobe', '-i', video_file, '-show_streams', '-select_streams', 'a', '-loglevel', 'error']
    result = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    return bool(result.stdout)

def detect_text(image):
    """Detect and count text in image using pytesseract"""
    import pytesseract
    gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
    text = pytesseract.image_to_string(gray)
    return len(text.strip())