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Introduction to FLV Although you may see FLV files around the web everyday, you may not know what and how it is used. FLV is the extension for the Flash Video Files, endorsed by Adobe. Flash Video Files are primarily used to deliver video over the internet using the widespread 'Adobe Flash Player' which can be installed as a plugin on most web browsers. FLV was originally created by Macromedia. As a default online video format for popular video sites such as Hulu, VEVO, Yahoo! Video, metacafe, Reuters.com, the FLV video format rose to popularity. Most computer users did not know what to do with this file, as Windows Media Player, does not support the FLV format. This has caused the up-rise of FLV Players, a software, especially designed to play those FLV Videos without the need of the Adobe Flash Player Plugin or a web browser. FLV Software As the video format become widespread, software, such as FLV Players and Converters became an internet sensation. Converters Converters allowed internet users, who downloaded a video in FLV format, to convert it to Windows Media Playable formats, such as AVI, WMV, MP4 and so on. These converters work by processing every frame, and outputting them in a different format. This often resulted in larger video sizes. Players Because of the long time it took to convert FLV videos, especially the ones that were more than an hour long, FLV Players turned out to be another popular tool on the internet. These players work by embedding the Adobe Flash Plugin in to their own user interface, playing any flash video file that gets opened. These video players have a similar user interface as Windows Media Player with the ability to allow you to navigate backward and forward through videos and play them in a loop. You can also adjust the volume, mute it, and adjust the size of the video. Recording Using FLV FLV files are extremely popular in recording and streaming videos due to their loseless feature. Loseless means that the quality of the video does not decrease when recording, meaning your video would not lag, blur or distort. Webcams and Screen Recorders all use the FLV Format as
default. Brief Structure The structure of a FLV file is technically complex, hence, I will only scratch the surface of it. Inside any Flash video, there is a signature, 'FLV', identifying the video as FLV. So incase of wrong file formats, such as an AVI file being named as a FLV file, the FLV player can recognize it. After the signature, the core features of that specific FLV video are stated:
width/height duration framerate keyframes
Definitions The width/height determines the width and height (the resolution) of the FLV video. The duration determines how long the FLV video plays. The frame-rate determines how fast the video is moving per second, in frames. The key frame, especially in animation and film-making, is a drawing that defines the starting and ending points of any smooth transition Audio and Video The audio and video are separately embedded in to the FLV file as two smaller FLV files. When opened, both combine, creating a visual video and audio sound. Now What? Now that you know more about the popular FLV video format, I suggest you go and try it yourself. Download a FLV file and then play it with a FLV Player. For example:
Download FLV Player Install FLV Player (Usually installs within seconds) Drag and Drop your FLV Video Into The FLV Player (Find your FLV video from your desktop or hard drive and drag it in to the Player)
Congratulations, you have just played a FLV file! Now kick back and relax as you enjoy your newly learnt video format.
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