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(Windows/NTSC) Smooth 24fps on Goggles can be had!
650 2 2017-9-30
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sigkill
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Some of us under the North American television standards may have noticed choppy playback of movies (or our own 24fps recordings) through our Goggles' HDMI connection, as compared to a TV capable of '24p' viewing. This can be due to the fact that film is 24 frames per second (23.976fps to be exact), but the Goggles do not have the ability (yet?) to refresh at 24Hz.

Thankfully the Goggles can refresh at 50Hz (which is of course exactly two times 25Hz), and this would be the preferred display rate to watch movies at. The following image shows an example of changing the refresh rate once viewing Windows Desktop via HDMI through our Goggles:



While this should improve the fluidity of film playback somewhat, it still doesn't match our target of 24fps. Here can use a freely available tool called 'ReClock' to force playback at 25fps. The following image shows the relevant setting to change in the ReClock interface via the tray icon after starting playback of a 24fps video file:



If after configuring things correctly, the ReClock tray icon should turn to a solid green, indicating that the video is being sped up slightly and the audio is being resampled. Video playback should now be exceptionally smooth.

In some cases (as with DVD video), further adjustments must be made. For example, some 24fps material has had a process known as 'telecine' applied to it, which is an attempt to make 24fps material not quite so choppy on 60Hz displays. The 24fps material is in fact intact, but the decoding system is slicing it into 'fields' and displaying them in an alternating pattern. Typical Windows video players (and/or Windows video device drivers) will attempt to apply the reverse process called 'inverse telecine' (IVTC), or in crude terms 'deinterlace', but sometimes this process is not done correctly. If this happens it will sabotage our efforts, but we can often control how exactly our system deinterlaces the video. The following image shows a successful attempt at finding the correct settings, using 'PotPlayer' media player. Please note that ReClock being a 32bit application requires PotPlayer to also be 32bit, and so this method will fail using PotPlayer x64, as evidenced by the lack of appearance of the ReClock tray icon.



If your Windows based video hardware and software has been configured correctly, you can now experience 24fps film and video in near perfect smoothness, just as the creator intended. Enjoy!
2017-9-30
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sigkill
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Hz.jpg
reclock.jpg
IVTC.jpg
2017-9-30
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sigkill
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ReClock https://www.videohelp.com/software/ReClock-Directshow-Filter
2017-9-30
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