How to convert Commercial DVD to Progressive with Avisynth & keep framerate

[VideoFanatic]

I was just wondering why when I demux the DVD to an MPEG2 then look at the info, it says it's "progressive or interlaced". How can it be either, I thought it can only be one or the other?

It's a PAL MPEG2 at 25 fps. If I try to use QTGMC to convert to progressive and keep the same frame rate (to keep it DVD compliant), it speeds up the video. In my video encoder I'm encoding the video as progressive. I don't want to lose half the temporal resolution and I thought that since this is a commercial DVD then it should already be progressive or I should be able to encode it as progressive with it's original framerate without losing half the temporal resolution?

Here's a DVD demuxed sample: Sample

I tried this script:

AssumeTFF()
QTGMC(Preset="fast") 
SelectOdd()

I also tried this:

AssumeTFF()
QTGMC(Preset="fast") 
SelectEven()

Full script I'm using:

setmtmode(5,9)
Mpeg2Source("H:\2 = New\video.d2v", CPU=6)
setmtmode(2,0)

AssumeTFF() # I've tried with and without this line but it made no difference
QTGMC(Preset="fast") 
SelectEven() # Documentation says to add this line to keep the original frame rate

[jagabo]

sample

MPG and VOB files can switch between progressive and interlaced at any time.

[sanlyn]

It's a PAL MPEG2 at 25 fps. If I try to use QTGMC to convert to progressive and keep the same frame rate (to keep it DVD compliant), it speeds up the video. In my video encoder I'm encoding the video as progressive. I don't want to lose half the temporal resolution and I thought that since this is a commercial DVD then it should already be progressive or I should be able to encode it as progressive with it's original framerate without losing half the temporal resolution?

Using the likes of QTGMC or yadif to deinterlace, you don't lose "half" of anything. The results of the deinterlaqce are interpolated, full-data, frames, not "half-fields". So if there is any loss, it's too neglible too worry about and is probably mostly noise. Why are you deinterlacing?

AFAIK retail standard PAL is usually 25fps interlaced.

I'll second jagabo's motion: how about a sample?

[manono]

If I try to use QTGMC to convert to progressive and keep the same frame rate (to keep it DVD compliant), it speeds up the video.

How can QTGMC (or anything else in that script) speed up the audio? There's not even any audio in your script. I use similar scripts on PAL sources all the time and not once has my audio speeded up. You're screwing it up in some other way.

[manono]

The sample is interlaced. I'd suggest reencoding it as interlaced. How can the audio get speeded up? Aren't you just keeping it unchanged and muxing it back in when authoring?

[johns0]

holygamer-please do not open another thread on the same subject,continue it in the first thread,this thread is closed.