Does AV recommend interlaced or progressive video?

Progressive is much better than interlaced; but we can accept both.

That's the simple story.  If you want more technical details, read on.

Interlaced video formats are really left over from 60 years ago when the first televisions were invented and featured an interlaced of two fields to create the display.  All modern displays are progressive.   

Many video cameras, particularly lower cost models, still offer both interlaced and progressive video recording options.  Interlaced options are typically listed as '30i', '60i' or 'i60' while progressive options are '30p', 'p30' or '60p'. 

It can be tempting to choose interlaced video.  Many camera offer a choice between '60i' or '30p'.  Given that choice it is tempting to use the 60i over the 30p as 60 is clearly bigger than 30.  Don't be fooled.  The Interlaced video is not really capturing 60 frames per second. It's actually capturing 60 'fields' per second.  What's a 'field'?   A 'field' is basically 1/2 of the resolution of a video frame.  Specifically a field is either all the odd lines or even lines from a frame.  So 60i really give you 1/2 the resolution, at twice the rate, compared to 30p. 

Still tempted to use Interlaced?  

It gets worse.   Since the two fields are captured at different times, when we combine the fields into a single frame there are motion artifacts that distort the video.  During perfectly still scenes, this is hardly noticeable, but the best moments in sports are typically also when the fastest motion is occurring.  Even in a nearly still scene, like a soccer field before kick-off, moving the camera has the same impact as high-speed motion.  So simply panning the camera will create motion artifacts across the entire field. 

Don't worry - we can fix it (mostly)

If you have interlaced video, don't worry.  AmperVue will use state-of-the-art techniques to convert the interlaced video to progressive video before we create highlights.  However, there is no perfect approach to this type of conversion, so the final result will often show small artifacts or lower resolution.  Results will vary depending on the the speed and type of motion.  So we'll do our best with interlaced video, but we still recommend progressive.  

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