PAL interlace detection is broken

[GoogleCodeExporter]

>What steps will reproduce the problem?

Importing PAL MPEG2 DVB-T clips

>What is the expected output? What do you see instead?

Interlaced clips are commonly being identified as Progressive or sometimes 
Hybrid

>What version of the product are you using? On what operating system?

276.1 on Win7 64-bit.

>Please provide any additional information below.

This detection used to work fine but is getting progressively worse (haha)

Is this just default settings I should change or something deeper?

Original issue reported on code.google.com by mortb...@gmail.com on 9 Jun 2012 at 6:09

[GoogleCodeExporter]

It means that your video is encoded (transmitted) as interlaced, but video 
content itself is progressive, so every two fields from a frame contains the 
same picture. With such a video you will not see any "lines" when you watching 
it without deinterlacing and resizing. It is very common situation for PAL. 
Unfortunately, some parts of the video may contains real interlaced 
frames(=Hybrid). Also due to not very good efficiency of MPEG2(especially if 
we're talking about DVB transmissions with pretty low bitrates)even on those 
parts, as looked as progressive, some "a-la-interlaced" artifacts may appears 
on fades, scenes changes e.t.c.

If you don't agree with the results of the analysing and always prefer what 
MediaInfo told you - simply turn off auto detection (Settings->Auto 
deinterlace->Disabled; yes, the name of this option is slightly misleading).

Original comment by forc...@gmail.com on 9 Jun 2012 at 9:07

[GoogleCodeExporter]

You can try to do a manual analysis.
To do so, go to video then Interlace/Framerate.
Then click on the Analyse button, once it has finished, hover your mouse on 
Analyse button (without clicking) and you'll see a detailed result.
This result should help you (most of the time) to determine what setting to use.

Original comment by Okocha1...@gmail.com on 11 Jun 2012 at 9:27

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