FBR is a proprietary file format used by the BB FlashBack screen recording program for the Windows operating system. You can use this program to record actions you take on your computer and create tutorials. Among the features of this program is an export function, allowing you to convert movies you have recorded from the FBR format to several different other formats, including MP4, a video format compatible with mobile Apple devices such as iPods, iPhones and iPads.
Launch BBR Flashback Player and open the file you want to convert.
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Click "File" and select "Export."
Select "MPEG4" and click "OK." This opens a window allowing you to configure various settings for your video.
Configure the video settings to your liking and click "Export."
Navigate to the folder where you want to save the exported video, name the file and click "Save."
BB FlashBack Express, the free version of the program, lacks the MPEG4 export feature. If all you have is the free version, you can either install the trial version of BB FlashBack Standard or BB FlashBack Pro or convert your movie to a different format, such as AVI, and use a different converter program such as VLC to convert it to MP4.