Please help with interlacing lines : (

[LiNUXG33K]

Hi -

I have a DVD that I have ripped (smart ripper) convert (DVD2AVI) and encoded (TMPGenc) to a SVCD MPG2 file. I *assumed* that the source was interlaced since it was a DVD for television. So When I got to the encodeing stage I told TMPGenc to de-interlace it since I want the best picture to play on my computer. The final result now has interlacing lines when viewed on the computer screen : (

Now two Questions:

1) Why would a de-interlaced mpg show lines on a computer monitor ?

2) How can I tell if the source (DVD) is progresive or not ???


Thank you !
John

[Triton]

Ok there is an option in dvd2avi that you need to check. Click on the Forced Film option and that will make the movie a NTSC Standard 23.976. which should solve your problems.

[LiNUXG33K]

Oh I am sorry I forgot to mention that this is a PAL DVD that I am ripping. SHould I still change that setting ???

Thanks again
John

[banjazzer]

Don't use force film with a PAL DVD or else you will end up with a 20fps movie which will look horrendous!

When you use DVD2AVI, in the preview screen you can step through the movie. Any interlacing will be immediately obvious.

If it is interlaced (likely with PAL TV material) there are many de-interlace options in TMPG, and you should be able to preview the effects of each. Alternatively, use the source range settings to encode a small sample with different interlace settings.

However, if you only intend to watch on your PC, you would be much better off encoding to DivX!

[banjazzer]

And the result is? Either the advice given was relevant or not relevant. Perhaps those who ask questions here might consider it polite to provide feedback on whether they have resolved their problems???

[LiNUXG33K]

Hello -

Sorry but I hadn't had a chance to try that yet. I am working 14 hour days now !

I did just try the DVD2AVI tip you mentioned, and yes in fact I can see the interlace lines of the DVD. I have also looked at TMPGenc but the only option I know of is either Interlaced or Non-Interlaced. I have tried them both on a small clip, as soon as I change it to non-interlaced the result is again very laced on my computer screen. Why would this be ??

Thanks again for your time !!

John

[banjazzer]

In advanced settings you must choose the source type as interlaced. Then you must choose the field order. One will not give smooth motion. Then you have a de-interlace setting, which you must use if you want to use the encoded movie on your PC. There are around 16 settings, but usually you will find working down the list one that works early on. However, encode a sample first so as not to waste a lot of time.

[LiNUXG33K]

Wow ... I never saw those deinterlace settings in there before ! Yes there
are alot to try now : ) What is the purpose of the viewing window in that settings area ? Can I preview the results there or ... ?

Another question also ... you mentioned setting the correct field order, which I really know nothing about, but with my version of TMPG it says that it is setting the correct field order for me. Is that ok ?

Thanks again !
John

[banjazzer]

What is the purpose of the viewing window in that settings area ? Can I preview the results there or ... ?

I think so. I'm not 100% sure as it's a while since I had to de-interlace anything.

with my version of TMPG it says that it is setting the correct field order for me. Is that ok ?

It may indeed be, but I don't think TMPG is guaranteed to get it right. If it's wrong you will know about it!

However, to avoid wasting a lot of time, when you think you have the right settings, encode a small sample first.

[LiNUXG33K]

Banjazzer -

Thank you once again for all your information. I think I have it all in my thick head now : )

Cheers
John