BB FlashBack screen recording software uses FBR format as it's default video format, but also offers users tools to export their files to common formats, including the MPEG-4 (.mp4) files, which is pretty much what fbr to mp4 conversion describes.
With the removal of Flash export (SWF/FLV), MP4 format is preferred export option, well-suited for playback on most mobile and desktop devices. BB FlashBack tools fully support h.264 codec and users can adjust many settings and options (frames, quality, scale etc.) before doing the export.
Updated: October 26, 2023