====== FFPLAY ======
<color #db5f0b>Aug 2017</color>
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FFPLAY comes bundled with the ffmpeg download. The ffplay is a simple to use command line app for playing the extracted streams that you have just created.
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The simple use of fflplay is just:
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    ffplay filename.mp4
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However, the issue with UHD streams is that they are larger than most monitors, so it is generally necessary to either rescale the output, or force it to fullscreen.
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To replay a video in a window.
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    ffplay -i video.mpg -vf scale=800x600
    
    This will replay the selected file at a window size of 800x600. Remember, currently (End 2016) 
    UHD streams play very poorly and you will only get 1 or 2 frames per second. 
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To replay a video full screen.
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    ffplay -i video.mpg -vs
    
    This will replay the video at fullscreen resolution.
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