Interlaced truly neccesary?

[Jan Marijniszoon]

I have a DVD-9 source which reports to be interlaced content.

However, when I perform the "SeparateFields" command in Avisynth every other field seems to be an exact copy of the previous one (except voor the 'bounce' effect because of the line difference).
When I play the video in "DGIndex" almost no interlaced artifacts are to be seen...only sometimes at a scene change.

My question is now: should I encode this source as progressive (enabling the option: disable interlaced) in order to gain more efficieny in encoding with CCE?

Thanks in advance for answering my question.

[LoRd_MuldeR]

When I play the video in "DGIndex" almost no interlaced artifacts are to be seen...only sometimes at a scene change.

I'd use TDeint with "Evaluate all frames" disabled, in order to only deinterlace the interlaced frames.
This should give a progressive stream that can be encoded as none-interlaced safely. The progressive frames won't be touched.

[Boulder]

Most PAL DVDs are flagged as interlaced even if they have progressive content (extras are a different story).

[SeeMoreDigital]

My question is now: should I encode this source as progressive (enabling the option: disable interlaced) in order to gain more efficieny in encoding with CCE?

Thanks in advance for answering my question.Can you provide us with a short clip from your source?


Cheers

[Jan Marijniszoon]

Thanks guys for your responding so far.

Here is the requested sample...

http://www.megaupload.com/?d=E07HTMN5

Sorry it's megaupload, so I hope you can stand the nags.

[LoRd_MuldeR]

This looks like badly deinterlaced/converted video to me.
My theory: What you see is not combing artifacts from interlaced video, but the relict of improper deinterlacing.

TDeint with "Evaluate all frames" disabled won't work here, because there are very few frames with enough interlacing artifacts.
So most frames would be passed through without any change...

Maybe simply deinterlace all frames with something like "linear blend" or "cubic interpolation" ???

Before: http://img125.imageshack.us/img125/2701/dadbeforewq9.png
After: http://img125.imageshack.us/img125/3220/dadafterev8.png

[SeeMoreDigital]

A lot of 1970's BBC content was converted from film to interlaced (composite) video. Sadly, the original film sources have long since gone!