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That interlaced look

(February 2015)

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LL
Larry the Loafer
I'm not sure if this is the best forum to ask this, but I figured somebody might know. Does anybody know if there are specific encoding settings to give videos that smooth, interlaced look? The reason I ask is I transfer things recorded from TV onto a DVD-RW and then rip them onto a hard drive. But after they've been ripped, they lose that smooth look that interlaced broadcast footage has. The only settings I can configure is frame rate, bit rate, and whether or not I want to deinterlace.

I'm convinced it's not related to frame rate, because I've tried exporting in both 25fps and 30fps. The only time I've seen it become apparent is a rip of Eurovision 2014 I downloaded that was playing in 50fps, and that was smooth as butter. But even when I ignore an option to "deinterlace", I can't get that smooth look. However, when I play the DVD-RW on OS X's DVD Player, it's incredibly smooth. It's the only DVD player program I've seen that makes it look like a live broadcast.

I don't suppose anybody has any advice to pass along regarding this? Anything would be appreciated Very Happy
NG
noggin Founding member
If you are ripping on a PC/Mac make sure that you don't re-encode (or if you do that you re-encode at 50i not 25p - but this really needs software that knows what it is doing to do it properly) AND if you are watching on a PC/Mac make sure that you are watching in an application which does a 'frame per field' not 'frame per frame' de-interlace - so you get 50p motion from a 50i (aka i25) source not 25p.

In VLC playing back with YADIF 2x works quite well. In Kodi/XBMC it varies based on your graphics solution and platform. Apple's DVD Player does a reasonable job.

Ripping a 50i DVD with something like Handbrake almost always rips at 25p losing the 50Hz smooth motion of native interlaced content. You really need to rip losslessly as a VIDEO_TS or ISO and then playback in an app like VLC that handles interlaced content properly.

And using the description 'interlaced' to describe full 50/60Hz motion is a bit out of date in the HD era. Lots of countries - Sweden, Germany, Norway (and for that matter large chunks of the US broadcast market) use progressive at the same refresh rate as UK interlaced content which has the same smooth motion. 720/50p and 1080/50i both look identical in terms of smooth motion in refresh rate terms, as do 720/60p and 1080/60i.

It is now quite out of date to describe 'film look' as 'progressive' and 'video look' as 'interlaced' (as it can be progressive too)
LL
Larry the Loafer
Thanks for that noggin. I've tried using YADIF 2x but to no avail. I can only presume it'll be the rip settings that need adjusting, seeing as I can only get that smooth look by playing from Apple's DVD Player. I'll play around with some different ripping programs and see what they come up with.
DB
dbl
A few Youtube uploads I've seen uses 50p:



(obviously switch to 720p to view)
IT
IndigoTucker
You can get the interlaced look with Handbrake from your DVDs/Interlaced Caps. Set framerate to 50 (or 59.94 for NTSC), and switch on Deinterlacing/Bob in Picture settings.
NG
noggin Founding member
dbl posted:
A few Youtube uploads I've seen uses 50p:

http://www.youtube.com/watch?v=3vbSvdZVLlc

(obviously switch to 720p to view)


Yep - YouTube supports >30p stuff now which is great. You often see the low bitrate stuff at 25p first then then 50p kicks in as the bitrate goes up.
NG
noggin Founding member
You can get the interlaced look with Handbrake from your DVDs/Interlaced Caps. Set framerate to 50 (or 59.94 for NTSC), and switch on Deinterlacing/Bob in Picture settings.


Though Bob is a pretty basic de-interlacer and far from ideal. YADIF 2x or a decent Motion Compensated de-interlace will deliver higher vertical resolution as well as full field-rate motion.
LL
Larry the Loafer
It does beg the question - how do TV Ark manage to capture and upload their more recent clips so smoothly? There must be an export procedure because that isn't reliant on playback settings on the website...?
MD
mdtauk
When graphics packages, or programmes are sent to the BBC/itv/etc, are they still typically delivered at 50fps, or 25fps? What about interlaced or progressive?

Looking at the delivery standards document, it shows 25fps but also interlaced...
Quote:

2.1 High Definition Format
All material delivered for UK HD TV transmission must be:
- 1920 x 1080 pixels in an aspect ratio of 16:9
- 25 frames per second (50 fields) interlaced - now known as 1080i/25.
- colour sub-sampled at a ratio of 4:2:2
Last edited by mdtauk on 3 March 2015 11:51am

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