WebVideoCap v1.41 - Capture Flash video and RTSP/MMS streams.
Copyright (c) 2007 - 2011 Nir Sofer

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While watching a video in a Web site, you may sometimes want to save the video into your local drive, and then play it offline later. This utility allows you to capture .flv (Flash Video) files and RTSP/MMS video streams while the Web browser download and play them inside a Web page. After the entire video file is downloaded and played by the Web browser, the video file is saved in the folder that you selected, and you can play it offline later with any Video player.

System Requirements

This utility works on Windows 2000/XP/2003/Vista. Older versions of Windows are not supported. Be aware that under Windows 2000/XP, WebVideoCap can only capture the video files if you log on as a user with admin rights.
In order to use WebVideoCap under Windows Vista with SP1, you must download and install the WinPcap driver, and select the WinPcap driver as the capture method.

Versions History

  • Version 1.41:
    • Fixed WebVideoCap to capture the .mp4 files of dailymotion.com and probably other Web sites.
  • Version 1.40:
    • Fixed issue: WebVideoCap failed to capture .flv files in YouTube and probably other video sites, due to small change in the video servers.
  • Version 1.38:
    • Added Promiscuous Mode option for WinPCap capture in Advanced Options window, which is disabled by default. In previous versions, WebVideoCap always worked in Promiscuous Mode, but in some wireless cards, the network packets cannot be captured at all in this mode.
  • Version 1.37:
    • Fixed bug: WebVideoCap crashed on some mms/RTSP streams.
  • Version 1.36:
    • Fixed small bug: The .MP4 capture option was enabled during capture.
  • Version 1.35:
    • Added support for capturing .MP4 files played by Flash.
  • Version 1.33:
    • Fixed bug: WebVideoCap failed to capture Silverlight mms streams.
  • Version 1.32:
    • Fixed bug: WebVideoCap failed to capture MMS streams in non-chunked mode.
  • Version 1.31:
    • Fixed bug: WebVideoCap failed to capture some RTSP streams.
  • Version 1.30:
    • Added support for capturing with WinPcap driver (for using with Vista/SP1)
  • Version 1.27:
    • Main dialog-box is now resizable.
  • Version 1.26:
    • Fixed bug: WebVideoCap failed to capture .flv files properly if there was more than one .flv file in the same http connection. (like in ABC News site)
  • Version 1.25:
    • Added support for .swf files.
  • Version 1.20:
    • Added in 'Advanced Options': 'Keep the captured files opened until the capture is finished'.
  • Version 1.19:
    • Added error messages when the starting the capture process fails.
  • Version 1.18:
    • Added new option: Automatically delete captured files smaller than...
  • Version 1.17:
    • Added 'Advanced Options' window, that allows you to control the capture buffer size.
    • Fixed the tab order in the main window of WebVideoCap.
  • Version 1.16 - Added support for another type of .wmv stream.
  • Version 1.15 - Added support for capturing MMS streams.
  • Version 1.10 - Added support for capturing .wmv files and RTSP streams.
  • Version 1.01 - Fixed bug: WebVideoCap failed to capture files if computer name was 'localhost'.
  • Version 1.00 - First release.

Known Limitations

  • Currently, WebVideoCap can only capture the following types of video streams:
    • Flash video files (with .flv extension).
    • Microsoft Windows media files (with .wmv extension).
    • RTSP streams. (RTSP protocol is used by many news and live TV/radio Web sites)
    • MMS streams. (MMS protocol is used by many news and live TV/radio Web sites)

    Be aware that WebVideoCap cannot capture streams of RTMP protocol. Support for more types of video or audio streams may be added in future versions.

  • While capturing RTSP/MMS streams, WebVideoCap save the video raw data into the file in a format that you won't be able to play it. Only after you press the 'Stop Capture' button, the captured .wmv file is converted into a format that will allow you to play it with a Video player.
  • If you use the Windows Media Player to play a video file captured from RTSP/MMS stream, you won't be able to move it forward or backward.
  • If the video file is already saved in your browser's cache, WebVideoCap won't be able to capture it. However, in that case, you can retrieve the cached video file by using the VideoCacheView utility. Alternatively, you can simply clear the cache of your Web browser, and then reload the video Web page.

Using WebVideoCap

WebVideoCap doesn't require any installation process or additional DLL files. In order to start using it, simply run the executable file - WebVideoCap.exe
(However, if you have Vista with SP1, you have to download and install the WinPcap driver)
After you run it, the main window of WebVideoCap is displayed. First, you have to select the folder that you want to save the captured video files. By default, the save folder is located in the 'files' folder under the folder of the executable file. If you have more than one network or dialup adapter, you should also select the right adapter.
After that, you can click the 'Start Capture' button. While WebVideoCap is in capture mode, open your browser in a video Web page. If everything goes right, you should see a new video file created and grown inside the folder that you have selected. You can continue watching more Web site videos while WebVideoCap capture the video files in the background. After you finish, click the 'Stop Capture' button.

Playing The Video Files

Most Web sites today use Flash video files (.flv extension) for playing video inside the Web page.
WebVideoCap doesn't provide a build-in video player, but you can use any flv player to play the video files that you captured with WebVideoCap.

If you don't have a video player that can play .flv files, you may try one of the following freeware solutions:

Capture Buffer Size

Starting from version 1.17, WebVideoCap allows you to control the capture buffer size, in the 'Advanced' options window. In most cases, you should not change this value. However, if the files that you capture are corrupted, increasing this 'Buffer Size' value may solve the problem.

Keep the captured files opened until the capture is finished

If you have a very fast Internet connection, and the files that you capture are corrupted even after increasing the buffer size, selecting this option should increase the performances of saving the video files to disk, and thus it may solve corrupted files problems.
However, be aware that when you choose this option, the capture files will be remained open until you stop the capture process by clicking the "Stop Capture" button.

Translating WebVideoCap to other languages

In order to translate WebVideoCap to other language, follow the instructions below:
  1. Run WebVideoCap with /savelangfile parameter:
    WebVideoCap.exe /savelangfile
    A file named WebVideoCap_lng.ini will be created in the folder of WebVideoCap utility.
  2. Open the created language file in Notepad or in any other text editor.
  3. Translate all string entries to the desired language. Optionally, you can also add your name and/or a link to your Web site. (TranslatorName and TranslatorURL values) If you add this information, it'll be used in the 'About' window.
  4. After you finish the translation, Run WebVideoCap, and all translated strings will be loaded from the language file.
    If you want to run WebVideoCap without the translation, simply rename the language file, or move it to another folder.


This utility is released as freeware. You are allowed to freely distribute this utility via floppy disk, CD-ROM, Internet, or in any other way, as long as you don't charge anything for this. If you distribute this utility, you must include all files in the distribution package, without any modification !


The software is provided "AS IS" without any warranty, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. The author will not be liable for any special, incidental, consequential or indirect damages due to loss of data or any other reason.


If you have any problem, suggestion, comment, or you found a bug in my utility, you can send a message to nirsofer@yahoo.com
Download WebVideoCap in zip File
Download self-install executable for installing WebVideoCap with uninstall support

WebVideoCap is also available in other languages. In order to change the language of WebVideoCap, download the appropriate language zip file, extract the 'webvideocap_lng.ini', and put it in the same folder that you Installed WebVideoCap utility.

LanguageTranslated ByDateVersion
Brazilian PortuguesePaulo Guzmán 04/07/20121.41
Bulgarian Buy Bulgarian Properties 23/07/2008 
Czech Martin Vilímovský - CompHelp 13/02/2009 
DanishLeo Vaeversted 04/03/2009 
DutchJan Verheijen 23/03/20151.41
Dutch Sander Lambregts 25/02/20091.35
French LiberKey.com 18/05/2008 
Galician Xosé Antón Vicente Rodríguez 26/12/2007 
German «Latino» auf WinTotal.de 12/03/20141.41
GreekGeorge Georgiou 18/03/2008 
Hebrewאהרון דון - ישראל 16/06/20101.38
HungarianJánosfalvi Kálmán 02/10/2008 
Italian Alessandro Viscone 05/07/20111.40
Korean이종구(Jong Ku Lee) 13/03/2009 
PersianAmin T.K امين تقي زاده 02/12/2011 
Polish JoMeg 18/07/2008 
PortugueseMReis 12/12/2007 
Romanian Jaff (Oprea Nicolae) 05/05/20121.41
Russian Anatoliy Petukhov 07/07/2008 
RussianDmitry Yerokhin 11/04/2010 
Simplified Chineserenda 25/02/2009 
Simplified Chinesedingsq 30/01/2011 
SlovakFrantišek Fico 11/02/20171.41
SpanishJorge Ronald Cribb - Argentina 11/02/2008 
Spanish Ricardo A. Rivas 11/09/2008 
SwedishLeif Larsson 21/06/20091.37
Traditional Chinese 丹楓 Danfong-虫二電氣診所 07/11/2010 
TurkishHARUN ARI 24/10/20111.41
UkrainianDmitri Ivanchenko 16/07/2008 
Valencian vjatv 24/02/2008