Deinterlacing SD material properly after upscale to 1080p50

[diginoob]

Hello,

I've some TV captures in Full HD 50p, which includes SD Interlaced Material.
Is it possible to fix that and how?

Thanks for the help.

[Sharc]

One has to deinterlace BEFORE upscaling, to begin with ..... (Title of your thread)

[diginoob]

I know, but that can't be done.
The TV channel do the upscaling with no deinterlacing, they broadcast it that way.

[Sharc]

This capture is just bad. How did you capture this? Look at frame 195 for example. Same if you inspect the fields.

[diginoob]

I grab it from iptv.

Here's the official Youtube Upload from the Channel, only FullHD 25p but still no deinterlaced material.
https://www.youtube.com/watch?v=kwfae8AozdU

[Sharc]

It's borked there. Your "capture" made it even worse (?), it seems ....

[GAhere]

I grab it from iptv.

Here's the official Youtube Upload from the Channel, only FullHD 25p but still no deinterlaced material.
https://www.youtube.com/watch?v=kwfae8AozdU

Content is not available in US so I can't comment on the quality.

However you do understand that YouTube IS a terrible source for video?

Youtube by default ALWAYS "re encodes" all of the video content that is uploaded to the site.

Per https://support.google.com/youtube/answer/4603579?hl=en

From link above..

"Note that YouTube always re-encodes videos to optimize their playback quality."


While they claim it is done to "optimize" playback quality, the reality is it is most likely done more for optimizing space on their servers and lowering bandwidth requirements so those watching the content can do so on lower internet speeds with less buffering.

Basically, this re-encode is at a lower bit rate and a much higher compression than the actual submitted source.

I had a co-worker that would record HD video at the highest quality possible, upload it to YouTube so other band members could see the uploaded video.. Yeah, he was disappointed with just how bad the video looked after YouTube got a hold on it.. He would complain to me about it (like I could do anything about what YouTube does) and I explained that YouTube re-encodes all video when it is uploaded and if he really wanted the bandmembers to get the full HD video that he needs to open a online storage account that has shareable links instead of using YouTube..

You need to first find a NON YouTube source..

[diginoob]

I know, Youtube HD is crap.
It was just to show, that MY IPTV grab from the Live TV Channel is not the problem.

The broadcaster did it wrong.

Some Episodes of the show are deinterlaced the right way.
There I've a smooth real 50p video.

There are 2 ways in my opinion.
- Breaking in into the National Geographic Germany Archive, steal the mastertapes, capture and deinterlacing it the right way.
- Get the files I have to work, perhaps not 100% good, but much better.

I think I need to know the original parameters (height, width ect) so I can deinterlacing properly?

[GAhere]

I know, Youtube HD is crap.
It was just to show, that MY IPTV grab from the Live TV Channel is not the problem.

The broadcaster did it wrong.

Some Episodes of the show are deinterlaced the right way.
There I've a smooth real 50p video.

There are 2 ways in my opinion.
- Breaking in into the National Geographic Germany Archive, steal the mastertapes, capture and deinterlacing it the right way.
- Get the files I have to work, perhaps not 100% good, but much better.

I think I need to know the original parameters (height, width ect) so I can deinterlacing properly?

I should have also noted.. Pretty much any and all Internet streaming services free and paid will also use highly compressed video formats, that may also mean that they have also re-encoded the video, this can be on the fly or done before they have stored the program on their servers. Heck they could even be pulling the video you want from YouTube as an embedded link and you would be none the wiser.

As far as attempting to deinterlace a video that may have had multiple re-encodes that most likely started with the source being interlaced before upscaling goes, me thinks it will be like pushing a boulder uphill with your nose..

Your original parameters if the video started life as SD would most likely be standard screen 4-3 (square picture) or Widescreen 16-9. Then add in that the original video may also have started life as NTSC and then converted to PAL adding in even more challenges and artifacts.

Not sure you are going to "fix" it..

I am not a fan of streaming, tends to make a mess of things if your picky and it was never designed for one to "keep", record, save files or play on giant TV screens.. No, it is intended for folks to watch on small smart phone screens where any and all imperfections induced by the streamer are never noticed and the viewer just watches the program directly from the streamer..

[Sharc]

I think I need to know the original parameters (height, width ect) so I can deinterlacing properly?

Forget it. Your file is crap and suffers from many more deficiencies than just improper deinterlacing. You could downscale-upscale to mush the scanlines but this still would keep the ugly ghosts. Ditch it or live with it IMO.
Maybe someone else has a better idea....