The "downloaded segment is empty" error in Ant Video Downloader (AVD) typically indicates that while the tool detected a video stream, it was unable to capture actual data from the source segments
. This often happens when there is a mismatch between the extension and the site's streaming protocol or when security software interferes with the Native Application communication. Firefox Add-ons Troubleshooting Steps for Empty Segments Verify Native Application Installation
: AVD requires a "Native Application" to handle actual file downloads. Ensure avd-host.exe ffmpeg.exe
are present in your local application data folder (typically %LocalAppData%\Programs\Ant.com\Ant Video downloader Check Antivirus/Security Blocks
: Security software may quarantine the downloader's components or block its communication with the browser. Try adding the AVD installation folder to your antivirus exclusion list. Address Browser VPN Conflicts
: If you are using a browser-based VPN, the AVD extension will use it, but the Native App (which does the heavy lifting) may not. This causes the downloader to "see" the video but fail to retrieve the data. Switch to a system-wide VPN if necessary. Clear Temporary Cache
: Sometimes corrupted temporary segment files prevent new data from being written. Go to AVD Settings ant video downloader downloaded segment is empty
, find the "Temporary files folder," and delete all its contents. Disable Hardware Acceleration
: In some browsers, GPU hardware acceleration can cause glitches in video capture. Try turning it off in your browser's "Performance" settings. Mozilla Support Known Limitations Unsupported Protocols
: Versions prior to 4.14 do not support external audio streams in HLS protocols or complex MPEG-DASH (MPD) streaming. Site Updates
: Websites frequently update their streaming algorithms to block downloaders. If an empty file occurs only on a specific site that previously worked, it is likely a server-side change.
If these steps do not resolve the issue, you can report the specific URL and your AVD version to the Ant Support Team for further analysis. Mozilla Support To help me narrow this down, could you tell me: are you using (Chrome, Firefox, etc.)? Is this happening on all websites or just one specific site? Have you recently updated your operating system
ANT video downloader can't download video | Firefox Support Forum The "downloaded segment is empty" error in Ant
If you are writing a script or a feature to handle video downloads and encountering empty segments, you need to implement validation and retry logic.
Here is a Python implementation using requests and m3u8 libraries that "completes the feature" by ensuring segments are not empty before proceeding.
If retries fail:
To understand the error, you must first understand how video downloaders like Ant work. Modern websites do not simply serve you one giant .mp4 file. Instead, they split videos into dozens, hundreds, or even thousands of small "segments" (usually .ts or .m4s files). Your browser or downloader reassembles these segments in real-time.
When Ant Video Downloader analyzes a page, it identifies a playlist file (like an M3U8 or MPD manifest). It then attempts to download each segment listed in that playlist. The error "Downloaded segment is empty" means that Ant successfully requested a specific segment from the website’s server, but the server responded with a file that has zero bytes—no video data, no audio data, absolutely nothing.
In essence, the downloader received a "ghost" file. Try to reconstruct missing segment from:
If you are downloading with 8 or 16 simultaneous connections, reduce to 1 or 2.
Most major streaming platforms (YouTube, Vimeo, Twitch, Netflix) use signed URLs or temporary tokens. These tokens expire anywhere from 30 seconds to 6 hours after the page loads. When you start a download, Ant captures the initial segment URLs. By the time you reach segment #150, the token for that segment has expired. The server, seeing an expired token, returns an empty 204 or 403 response.
Users of the Ant Video Downloader browser extension may occasionally encounter an error message stating that a "downloaded segment is empty." This error typically interrupts the downloading process, resulting in a corrupted or unplayable video file (often with a .mp4 or .webm extension but 0 bytes of data).
This issue usually indicates that the extension successfully requested the video data, but the server refused to send it, or the data was intercepted and blocked before it could reach your hard drive.
If Ant’s temp folder is on a full drive or a read‑only location, segment writes may fail silently.
Fix:
C:\Downloads\ (or another writable location).Expand Your Knowledge and Unlock Your Learning Potential - Your One-Stop Source for Information!
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