Hi Group,
I have been reading this forum for a couple of years but when the MoC Nosferatu came out, I was compelled to sign-up and throw in my two cents. I am not a video professional but simply a fanatical, obsessive film nerd with boatloads of 8mm film, laserdiscs, and DVDs. I apologize in advance for the length of this post. I am also making assumptions based on my knowledge and my analysis of the video content. I was not there when MoC did their work and I don't know what they did in their processes. Perhaps they could shed some light on the transfer and encoding process from the point of receiving the videos from Transit through the encoding of the DVD.
I analyzed the MoC Nosferatu using the following free software: GordianKnot, VirtualDub, and AviSynth. This video processing software enables all sort of functions including deinterlacing, inverse telecine (pulldown removal), frame rate conversions, etc. If you are a film geek like me, you may want to get copies and actually get your fingers into the video. Doom9.net is where I got my copies.
Bottom line is: The MoC disc is both combed (frame blended) and "ghosted" (field blended).
I have some frame and field grabs to illustrate this located
here. The frames on the left are the video frames. The two corresponding "shorter" frames to the right are the constituent video fields.
This is all a side effect of the strict adherence to the original projection speed of 18fps. 18fps could be changed to 25fps by repeating certain fields (applying a pulldown), which would result in combing. I don't have a problem with combing for transferring film footage with an intended frame rate less than 24fps. To paraphrase HerrSchrek's comment in an earlier post, this is common with silent films. However, because 18fps just doesn't divide neatly into 25fps, this would result in judder or little stops/stutters/hiccups in motion that appear at regular intervals. To make the frame rate change smooth requires field blending and that is what was done here. If the frame rate conversion process used some sort of bob-type deinterlacing, that would explain the softness of the image.
An alternative would've been to slow the film frame rate to 16.667fps (2/3 25fps), a 3:3 pulldown (used to change 19.98fps to 29.976fps for NTSC) could've be used. The progressive film content would be in the video stream intact with every third video frame being a blend of two adjacent frames. It would be combed but NOT ghosted and the frame rate would look comparable to 18fps.
I appreciate the desire for strict adherence to the "original" frame rate and all but the point is this: the majority of all DVDs produced (both PAL and NTSC) are not at the original film frame rate. 24fps film is typically sped up to 25fps for PAL and slowed very slightly to 23.976fps for NTSC.
In the PAL scenario, it is possible to transform 24fps to 25fps without speed up but the resultant video is heavily combed, ghosted, both, or has judder because one frame was repeated. It is trade off between image quality and projection speed and the typical choice by DVD encoders is to change the film speed so that it cooperates with the video to get the best image. With this disc, the choice was made as frame rate over image quality.
I assume Transit provided MoC with and already converted 18-->25fps PAL master and that MoC did the best they could with it.
Even with the flaws, it still looks incredible. Can you just imagine that it could've looked even better? Well, it could've.
My open question to the board is: if a tradeoff were required, which would you choose: Projection speed or image quality?