Confused with MPEG2 stream created by DVD2SVCD.

[SatoriGFX]

Ok. So, I have a DVD which is mostly progressive. In DVD2SVCD I set force film etc... to automatic. My log file says that force film was set to on and the framerate was 23.967. The video was encoded and then pulldown.exe was run on it. The pre-pulldown mpv file is 23.976, NTSC progressive. The resulting mpv file is 29.97 and Film BUT switches between interlaced and progressive very fast (10's of times a second).

So, the question is, did I do something wrong here? Shouldn't the final mpv be reported as progressive? Why would I end up with an interlaced mpeg stream when DVD2SVCD itself turned force film "on"?

The SVCD looks/plays decent enough on my standalone player. Audio is in sync, there is no jerkyness on playback etc... But I wonder if it is as good as it could be. There is some minor stair-stepping in the picture but that is probably more because I used SimpleResizer and I encoded to 352x480.

BTW. Bitrate Viewer reports the resulting mpv and the final mpg as interlaced.

Any help would be appreciated.

SatoriGFX.

[LeeBear]

The MPEG is suppose to be like that. What you're seeing is the soft telecine process (3:2 pulldown) which is basically the framerate conversion of film (23.976 fps) material so it's viewable on your television which is video base (29.97 fps). The method is the same method used by the studios when putting movies onto DVD. I suggest you goto http://www.lukesvideo.com/ and read the telecining section. It'll explain what's going on. Anyways you're not doing anything wrong with your encoding.

Now onto your minor stair-stepping effect. That's a common problem when using CVD resolution (352x480) and simple resize. You can reduce the effect by using a bilinear resize but I haven't found a way to eliminate it complete on my widescreen HDTV, it's not really noticeable on a regular TV though. I don't think it'll be possible to totally eliminate the jaggie problems because of the stange resolution that CVD uses, basically the pixels are rectangular looking oppose to square looking which emphasizes the jaggies.

-LeeBear

[SatoriGFX]

Thanks LeeBear. So, just to be clear. Are you telling me that I have a 23.976 stream where 3:2 pulldown is applied during playback? I am still confused why I am being told the stream is interlaced (or part interlaced). If I encode a progressive DivX to SVCD using TMPGEnc, the file I end up with is reported as progressive by DVD2AVI and Bitrate Viewer. Why would this case be any different?

Thanks again.

SatoriGFX.