problems encoding NTSC encoded DVDs with tempgenc (jumpy)

[poopyhead]

i've encountered some DVDs that are purely NTSC (as stated by dvd2avi), such as Cruel Intentions 2 and Chris Rock: Bigger & Blacker. I tried 4 different methods and all have bad results.

1) When I use forced film in dvd2avi and encode with tempgenc without any filters, there are horizontal lines everywhere (very interlaced).

2) Same as above, but this time i used "de-interlace" filter. the filter removed the horizontal lines, but now the rip is very, very jumpy. i used blend, odd field, and even field, but all were very jumpy.

3) I tried turning off forced film in dvd2avi and using the "inverse telecine" filter in tempgenc. under the "inverse telecine" filter, i set fps to 24, and in auto-set, i set to "automatic (remove horizontal stripe)" and deinterlace to "none". The result was same as (1). the filter didn't remove the horizontal lines (still lots of it)

4) as as above, but i enabled the "de-interlace" filter as well. still as jumpy as ever, even though horizontal lines are gone (used blend, odd field, and even field)

any help would be appreciated.....to encode NTSC to smooth, non-horizontal striped rip

<font size=-1>[ This Message was edited by: poopyhead on 2001-11-20 16:34:18 ]</font>

[pinoy2201]

Try a all-in-one program like FlaskMPeg and use the Panasonic mpeg encoder plugin or DVDx with the LSX Mpeg encoder plug-in....i use this method when i have the problem
you have

[poopyhead]

is there anyway to fix it using tempgenc?

[shochan]

Keep off forced film in dvd2avi. set your deinterlace filter to double field and let it go. dont try to inverse telecine it. its a waste and never really works.

[KoalaBear]

In all honesty, the answer to your question lies in the source: NTSC videotape or SMPTE film. Both are handled differently.

Videotape has a certain softness to it; a lack of sharpness of definition unique to itself. who's the boss was shot on tape, as was the golden girls and every soap opera that appears on daytime TV. I'm sure you know what I'm talking about -- that "video" look that every videotape shares, that film simply cannot duplicate.

Anyway, the only practical way to deinterlace video is to split each frame into its two component fields, line-double each field into a separate frame, and throw half the frames away in order to match the original frame rate. It sounds like you lose half your vertical resolution, but you don't because half that resolution was "borrowed" from the next frame anyway. In reality, it looks quite right.

Programs like AviSynth can manipulate a program at the field level. In order to do what I just described, you'd need two lines of code:

DoubleWeave # fields into frames
SelectEvery(2,0) # Correct Frame Rate

Film sources are different. In North America, all but the least expensive TV shows are shot on film, as are all theatrical pictures. "Frasier" is film, so is "Friends," so is "Band of Brothers." These sources are deinterlaced differently. They use a procedure called IVTC (Inverse Telecine) which has been covered extensively here and elsewhere.

I've never seen "Bigger & Blacker," but I'd bet money it was shot on videotape. "Cruel Intentions 2" sounds like film, so an entirely different deinterlacing strategy would be necessary.

Either way, the program should be properly deinterlaced prior to the time it's presented to TMPGenc for encoding. Never, ever rely on an MPEG encoder to fix what should never have been broken in the first place.

[poopyhead]

<TABLE BORDER=0 ALIGN=CENTER WIDTH=85%><TR><TD><font size=-1>Quote:</font><HR size=1 color=black></TD></TR><TR><TD><FONT SIZE=-1><BLOCKQUOTE>
On 2001-11-20 17:29:28, shochan wrote:
Keep off forced film in dvd2avi. set your deinterlace filter to double field and let it go. dont try to inverse telecine it. its a waste and never really works.
</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR size=1 color=black></TD></TR></TABLE>

double field...i don't see that anywhere..do u mean even/odd field? and i tried using that but tempgenc wouldn't let me cuz it's 2x fps...that means i can't use 3:2 pulldown..and when i disabled it...tempgenc gave me error like it can't handle that high of fps....help?

[poopyhead]

oops, my bad..."double" appears in later versions of tmpgenc...i'm using an early one....but double seems to be same as blend. anywayz, double (adaptive) or double doesn't seem to work...it removes horizontal lines...but the video is really jumpy