Ultra MP4 Video Converter 1.7.2 - User Guide and FAQ

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1. Output Folder : Output folder is for storing the output video files , this folder is set as C:\UltraMP4Folder\ by default.
2. Output Format :
   • MP4 Video Format (*.mp4)
   • AVI Video Format (*.avi)
   • DivX Movie (*.avi)
   • XviD Movie (*.avi)
   • Archos MPEG4 Format(*.avi)
   • Apple iPod MPEG4 Format(*.mp4)
   • Creative Zen Vision MPEG4 Format(*.avi)
   • iRiver PMP MPEG4 Format(*.avi)
   • Sony PSP MPEG4 Format(*.MP4)
3. Video Codec : Choose mpeg4 xvid or h264 as recommendation.
4. Video Quality : Higher video quality means a larger file size and lower conversion speed. so you need to balance the tradeoff between file size and quality.
5. Audio Quality : Higher audio quality means a larger file size and lower conversion speed. so you need to balance the tradeoff between file size and quality.
6. Resolution : Set the output video resolution (widht and height).
7. Frame Rate : Set the output video frame rate.
   Defines how many pictures eg. frames one second of video or audio contains, normally used acronym for framerate is fps - frames per second. Human eye can't see picture changes after the framerate is more than ~24fps.
   In American TV system NTSC the framerate is appx. 29.97fps and in European PAL system the framerate is 25fps.
8. Channels : Set the output audio channels, it will impact the output file size.
9. Sample Rate : Set the output audio sample rate, it will impact the output file size. It is fixed to 24000 MHZ.
   In developing an audio sound for computers or telecommunication, the sample rate is the number of samples of a sound that are taken per second to represent the event digitally. The more samples taken per second, the more accurate the digital representation of the sound can be. For example, the current sample rate for CD-quality audio is 44,100 samples per second. This sample rate can accurately reproduce the audio frequencies up to 20,500 hertz, covering the full range of human hearing.
10. Add Letterbox to keep aspect : If you want to keep the original video aspect ratio, check it, otherwise uncheck it.
    Movies, for instance, are almost always made in widescreen format. A widescreen movie needs to be displayed on a screen with different aspect ratio from the original film, the picture frame needs to be letterboxed.
11. Automatically Shut Down the computer when converting finished: If you check this option, it will shutdown computer when conversion completed.

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