Ant Video Downloader Downloaded Segment Is Empty -

| Component | Suggestion | |-----------|-------------| | Download manager | Add a SegmentValidator class | | Storage | Keep .part files for each segment separately | | Retry queue | Use priority queue for failed segments | | Empty detection | size == 0 OR content-length: 0 header OR first 4 bytes = 0x00000000 | | Manifest parser | Extract backup URLs from M3U8/MPD |

Users report that after downloading a video using Ant Video Downloader (browser extension or desktop app), the resulting file is either zero bytes, contains no playable content, or individual segments are empty. ant video downloader downloaded segment is empty

This script downloads an HLS stream but specifically checks for empty segments and retries them. Users report that after downloading a video using

import requests
import m3u8
import os
import sys
class VideoSegmentDownloader:
    def __init__(self, m3u8_url, output_filename="video.ts"):
        self.m3u8_url = m3u8_url
        self.output_filename = output_filename
        self.headers = 
            "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36",
            # Add 'Referer' if the video is on a protected site
            # "Referer": "https://example.com"
def validate_segment(self, content):
        """Feature: Check if segment is actually valid binary data"""
        if not content:
            return False
        # Basic check: Transport Stream files usually start with 0x47 (Sync byte)
        # Or check minimum file size (e.g., > 1KB)
        if len(content) < 100:
            print(f"Warning: Segment too small (len(content) bytes), likely empty or error.")
            return False
        return True
def download_segment(self, segment_uri, retry_count=3):
        """Feature: Download with retry logic for empty responses"""
        attempts = 0
        while attempts < retry_count:
            try:
                response = requests.get(segment_uri, headers=self.headers, timeout=10)
if response.status_code == 200:
                    content = response.content
                    if self.validate_segment(content):
                        return content
                    else:
                        print(f"Attempt attempts+1: Empty/Invalid segment content.")
                else:
                    print(f"Attempt attempts+1: HTTP response.status_code")
except Exception as e:
                print(f"Attempt attempts+1: Connection error - e")
attempts += 1
            # Optional: Wait before retry
return None
def run(self):
        print("Fetching M3U8 playlist...")
        try:
            m3u8_obj = m3u8.load(self.m3u8_url)
        except Exception as e:
            print(f"Failed to load m3u8: e")
            return
if not m3u8_obj.segments:
            print("No segments found in playlist.")
            return
total_segments = len(m3u8_obj.segments)
        print(f"Found total_segments segments. Starting download...")
with open(self.output_filename, 'wb') as f:
            for i, segment in enumerate(m3u8_obj.segments):
                seg_url = segment.absolute_uri # Handles relative paths automatically
print(f"Downloading segment i+1/total_segments...", end='\r')
data = self.download_segment(seg_url)
if data:
                    f.write(data)
                else:
                    print(f"\nERROR: Failed to download segment i+1 after retries. Feature incomplete.")
                    # Decide: Stop process or skip segment? 
                    # Writing a placeholder might corrupt video, usually best to stop or log.
                    # Here we stop.
                    return
print(f"\nDownload complete: self.output_filename")
# Usage Example
if __name__ == "__main__":
    # Replace with your actual m3u8 URL
    URL = "https://devstreaming-cdn.apple.com/videos/streaming/examples/img_bipbop_adv_example_ts/master.m3u8"
    downloader = VideoSegmentDownloader(URL)
    downloader.run()