Help w/ Deinterlacing

[ivanolo]

I'm having trouble figuring out the best course of action to take with a DVD I ripped. My goal is to encode it to XviD, but first I must deinterlace it. This has proven to be a nightmare due to my inexperience, so I find myself in need of guidance, despite having read a couple of tutorials.

Before we continue, let me provide you with important information from the clip, which I gathered using DGIndex:

• Aspect Ratio is 16:9
  Frame Size is 720x480
  Frame Rate is 29.97 fps
  Video Type is NTSC
  Frame Type is interlaced
  Field Order is Top First

My AviSynth script:

LoadPlugin("C:\Program Files\AviSynth\plugins\DGDecode.dll")
LoadPlugin("C:\Program Files\AviSynth\plugins\Decomb.dll")
MPEG2Source("C:\VIDEO_TS\VTS_01_1 - 0xE0 - Video - MPEG-2 - 720x480 (NTSC) - 16~9 - Letterboxed.d2v")
#BilinearResize(640,360)

And one final bit of information that may be useful--this is a live concert.

Now, on to my questions....
How do I determine whether it is necessary to apply pulldown or not?
Which method/filter do you recommend for the actual deinterlacing process?

*Keep in mind that I already searched the forums for an answer, unsuccessfully. If you believe that a solution to my problem has been posted, please point me in the right direction.

Thanks in advance!

[manono]

Hi-

How do I determine whether it is necessary to apply pulldown or not?

You mean "necessary to apply IVTC or not". Open that script in VDub(Mod) and scroll to a place with motion/movement. Shouldn't be too hard to find in a concert DVD. A nice closeup might be better, or you can also zoom in VDubMod by right-clicking the screen. Start advancing a frame at a time. If, in every 5 frame sequence, you see 3 progressive frames and 2 interlaced frames, it was shot on film, has been telecined, and can be IVTC'd. If every frame is interlaced, you can only deinterlace. If you see any other pattern (a 6 frame sequence, for example), you'll have to treat it differently yet.

Most, but by no means all, concert film DVDs have been shot on video and can only be deinterlaced.

Which method/filter do you recommend for the actual deinterlacing process?

If you want to IVTC, you can use Decomb's Telecide/Decimate combination, or TIVTC perhaps. For deinterlacing, in my opinion the best combination of speed and quality is LeakKernelDeint, found at the bottom of this page:

http://neuron2.net/kerneldeint/kerneldeint.html

[ivanolo]

Thank you very much. LeakKernelDeint worked perfectly, and its image quality was indeed superior to that of other filters I tried.
Here's my new AviSynth script (for reference):

LoadPlugin("C:\Program Files\AviSynth\plugins\DGDecode.dll")
LoadPlugin("C:\Program Files\AviSynth\plugins\LeakKernelDeint.dll")
MPEG2Source("C:\VIDEO_TS\VTS_01_1 - 0xE0 - Video - MPEG-2 - 720x480 (NTSC) - 16~9 - Letterboxed.d2v")
LeakKernelDeint(Order=1, Threshold=10, Sharp=False)
BilinearResize(640,360)