DownloadHelper is a way to discover many sites showing Web videos from all around the world. They are here !
DownloadHelper is also a free Firefox extension for downloading and converting videos from many sites with minimum effort. Install the extension !
Using DownloadHelper, you can easily save videos from most of the popular video sites. (Click here for lists of supported sites).
It is also possible to capture all the images from a gallery in a single operation.
Note that DownloadHelper does not break any real protection implemented on the sites. It just give an easier access to clear content that will be downloaded by your browser anyway. Unless exceptions, downloaded videos must be kept on your disk for personal use and not shown on other Web sites.
Its easy to convert the video from flv to avi
The program is Video Conversion with DownloadHelper
What is it about
DownloadHelper's primary job is to retrieve to your disk the videos that are playing in Web pages, in their original format.
Unfortunately, the native format (generally FLV) is often not very convenient when it comes to playing back the videos, on either your home computer or a hand held device, burning them to a DVD or reworking the movie.
With the new DownloadHelper's Video Conversion feature, you can very easily select one or more videos that lie on your disk and choose a pre-defined output format. The program will process the movies in background.
Even better: you can setup the extension to automatically convert the videos as soon as they are saved by DownloadHelper. You can even specify conversion rules (which site, which original media format) to be processed with a given set of parameters.
Video conversion is available on DownloadHelper 3.1 or later.
Easy or powerful ?
While you can select an output format by choosing it from a drop-down list, you can also fine tune the program to deal with dozens of parameters, like the size of the video, the bitrates to be generated, the number of frames per seconds, the audio and video codecs to be used and many more, including multi-pass conversions for an optimal result.
How does it work ?
DownloadHelper doesn't do the conversion by itself: this type of job is not really suitable for a Mozilla extension. Instead, it relies on the well-known FFMPEG program to do the conversion task, and provides the necessary glue to make it simple and convenient for DownloadHelper users.
FFMPEG is the most powerful video conversion utility. In fact, this is the back-end program used by most video converters on the market.
On Linux and Mac, DownloadHelper accesses directly the FFMPEG version you installed on your system. On Windows, this is simpler as you install directly an application, ConvertHelper, to make easier the DownloadHelper/FFMPEG relationship.
Installing the feature
Installing on Windows
Using video conversion with DownloadHelper requires that you turn on the feature from the extension's preferences dialog.
The simplest way to open the preferences is to right click on the DownloadHelper icon and select the first entry 'Preferences'. If the icon is not installed in the toolbar, the preferences can also be opened from the Tools / DownloadHelper / Preferences menu, or Tools / Add-ons menu, DownloadHelper selection, Preferences button. From the preferences window, the tab Conversion must be selected.
The Conversion enabled input must be checked.
The message in red indicates that ConvertHelper, the external program in charge of the conversion job, has not been found on the system. Clicking on the Install/Update converter button takes the user to a page where a ConvertHelper installation program can be downloaded from.
Installing ConvertHelper is an easy job
Once ConvertHelper is installed, click on the Re-check Converter button or reopen the preferences
Video conversion is ready to be used.
Installing on Linux and Mac
For Linux and Mac, we do not have a specific FFMPEG distribution to connect to DownloadHelper. Instead, the conversion relies on the distribution that has been installed separately on the computer. Of course, this can lead to conversion failures as the version of FFMPEG may not have been compiled with the features required by the chosen conversion parameters. This might be the case, for instance, when converting to MP3 format, as the native FFMPEG may not have this feature for legal reasons.
On Linux Ubuntu, you may install FFMPEG with:
sudo apt-get install ffmpeg
Or better, recompile FFMPEG with more features.
You can specify the exact location of the FFMPEG executable in the preferences.
Note that you can also use Mencoder as an alternative to FFMPEG. However, all the defined conversion parameters will simply be ignored.
Using the feature
Manual conversion allows the user to choose a set of video files from the standard File open dialog, and to
Answered By: hazeeq n - 4/2/2009