DV to Mpeg always interlaced

[forare]

Dear All,

I am using powerdirector 3 to edit and convert my DV avi to Mpeg2 compliant. The problem is that all produced mpeg2 are interlaced no matter what i did. I already used panasonic, ulead and mainconcept codecs but still getting the same result however i click the option deinterlace when producing. Any suggestion please ?
thank you

[guns1inger]

If you ultimate aim is to produce a DVD, leave it interlaced. You will not see it on your TV.

[edDV]

Any suggestion please ?

Why do you think you need to deinterlace?

Normally you would encode 480i/576i DV to 480i/576i DVD for best quality. Computer screens are progressive, therefore you will see field split while viewing the raw stream. You solve that problem by using a deinterlacing player without changing the video itself.

There are reasons to deinterlace in the PC but all reduce quality. You need to deinterlace if your goal is internet streaming or heavy compression (e.g. wmv, xvid, divx, h.264*). For DV source you would usually back up the full quality 480/576i before deinterlacing.


*use the VC-1 codec for high compression of interlace material.

[forare]

The problem is that on fast camera motion the video blurs after i encoded it to mpeg2, so i assume this is intrelacing while the original dv is excellent and no interlace. the same happens when playing dvd on tv on fast camera motion picture is not clear.

[guns1inger]

Without seeing a sample it is difficult to say exactly what the cause is, but at a guess it could be that the bitrate is too low. High motion scenes generally need higher bitrate because every pixel changes a lot, and more data is required to keep the image quality up.

[jagabo]

The problem is that on fast camera motion the video blurs after i encoded it to mpeg2, so i assume this is intrelacing while the original dv is excellent and no interlace.

No, your DV is probably interlaced. Microsoft hides the interlace comb artifacts with a BOB deinterlace when playing DV on the computer.

the same happens when playing dvd on tv on fast camera motion picture is not clear.

That sounds more like a blend deinterlace problem.

[edDV]

Are you seeing something like this? A blend deinterlace.


Or this? Field split on progressive monitor.


Or something else?

[forare]

Are you seeing something like this? A blend deinterlace.
[img]https://forum.videohelp.com/images/guides/p1609239/

Or this? Field split on progressive monitor.
[img]https://forum.videohelp.com/images/guides/p1609239/
Or something else?

I found out that my source DV avi has the same problem also but why ?? is it because may be of my VGA (gofrce 2) ?
i am attaching a sample of the encoded mpeg2 at 8000 bitrate, not much difference compared to the original AVI

thanks for your help

[edDV]

That shows blend deinterlace. This is particularly awful with shaky handheld video.

Your original DV-AVI file should not be progressive, it is your player that is doing this.

Start over and encode MPeg2 with interlace settings (e.g. lower field first, 29.97fps, 720x480*). Use a high average bitrate >7500 Kb/s. Do not deinterlace the MPeg2.

When you play back the DVD to a TV it should play smoothly without blur. Computer playback will require a deinterlacing player like PowerDVD. Usually a lite version of the PowerDVD or WinDVD player is included with DVD-ROM drives.
http://www.cyberlink.com/english/products/powerdvd/7/features.jsp


* or 25fps, 720x576 for PAL

[edDV]

A raw DV-AVI 480i file will look like this on a high motion frame when both fields are displayed on a progressive monitor. The fields are offset in time by 1/59.94 sec therefore the odd and even lines are displaced.



A bob deinterlace interpolates a full frame per field calculating a progressive frame every 1/59.94 sec.



A good deinterlacing player will adaptively apply various deinterlace techniques depending on the type of motion in the video. This is best done with hardware assist as is done in advanced video display cards, progressive DVD players and digital TV sets.