The SECRET behind Interlaced vs. Progressive Video 

I restore old dance videos and in ways they come out superior to my modern Sony Broadcast HDCAM when shot at 30 fps. This is in particular if the original video was on DVCAM or Super VHS. Dance, especially ballet, is not great at 30 fps. You are tricking your eyes with a set of continuous blurred images. With a powerful computer and correctly deinterlacing using AI you end up with true 60 fps where every frame is crisp if you capture a still frame. Artificial intelligence can do near miracles in restoration of old videos even when enlarging to 1920 x 1080.

You're so good at explaining things.

Thank you. I learn more from this video.

you are calm in person!!! thanks for the facts

You have a really good channel, should come back to it. THANKS

And I feel like I learn sumting eerytiem its a good feel

The way interlacing is explained here is wrong. The two fields in an interlaced frame *never* form a complete image. The fields are captured at separate points in time, they are separate images just with the odd/even lines missing. When played back, those odd and even lines also never fill each other in. The missing lines are completely missing from the signal. By the time the odd lines come around, the previous image with the even lines is long vanished from the display. It's only the eye/brain with its flicker fusion and persistence of vision that makes the moving image appear whole. The point of interlacing is also not doubling the framerate, but doubling the perceived vertical resolution due to the scanning starting at different lines each field. SImply put: Interlacing can be though of as 60fps progressive running at half the vertical resolution (this is also what you get when using basic Bob-deinterlacing). The combing that is associated with interlacing is basically just the result of playing back the video incorrectly (i.e. using 30fps instead of 60fps).

So much tech Nick cal I don't know what to do with myself...but I need more.

Brother how many lines are their in a frame

Hey there, superb job on explaining what was required in a clear and concise manner. I have a doubt, my Sony A58 only supports 50i/60i 1080i video. Does deinterlacing the footage in DaVinci Resolve essentially make it a 25 or 30 fps footage. Also is there any way I can slow down this footage to 50% without making it choppy?

Good teaching sir tysm

But also above all, you don't need a scientific reason as to why to use one over the other, on a purely technical level Progressive will always be superior, but that's not the whole tale, some images such as older games or sports have an extra flare of authenticity on interlaced. Grand Theft Auto IV looks best on a plasma TV in 1080i , football (what you call "soccer" in the U.S) looks best on an interlaced signal, so do football games like PES and Fifa, all PS2 and PS1 games look awful on progressive scan. I think that over the years we have sacrificed a great deal of beauty in the persuit of what is "technically superior" and we've gotten massive downgrades in other areas, LCD's came with much sharper images, colder and more efficient bodies and much larger choice of aspect ratios....and in return we lost the deep blacks, low input lag, high refresh rates, perfect viewing angles and perfect motion clarity of CRT's and Plasmas. It's frankly a tragedy that interlaced resolutions are being left behind today on computers and consoles, and its also odd, football channels still display 1080i in UEFA and Conmebol matches.

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-mXZRm40d7Ik.html I slowed down this video so you can see the issue with it. Notice the two men's movements, as one passes the other one cans of beer to put in the fridge.... it almost looks like tracers, or double-image .... the original digitized copy isn't like this, but after editing the video with DaVinci Resolve , this is how it looks. I even tried using the Deinterlace Feature that DaVinci offers, but it doesn't help. Can anyone tell me how to fix this issue?

It's so funny you mentioned comments I was going to say you look like an old friend I had from years ago-and I want to offer you his role in a hypothetical movie I'm writing! I so bad wanted to the LOL vbut part of me is serious anyway peace brother.