Problems w/ DVD2AVI and TMPGEnc

[Hoagie]

I am having trouble getting a DVD2AVI project to encode to a MPEG2 file under TMPGEnc. Has someone done this before that can help me out?

In DVD2AVI I set up my project. If the 'Field Operation' is set to 'None' I get very bad interlace lines and the video is choppy most of the time. If I set the Field Operation to 'Forced Film' the video is alright most of the time, but there are parts that become jumpy (as if I had it set None).

If I have the Field Operation set to None, then Scene A is ok (but has interlace lines) but Scene B is horribly jumping. If I set Field Operation to Forced Film, Scene A is now jumpy but Scene B looks great!

When I run the project, I notice that one of the readouts in DVD2AVI is switching between 'Film' and 'NTSC' (at the top of the readout display). Is this what is causing portions of the video to look good while others are horrible?

Are there settings in TMPGEnc that I can set up to fix these odd little moments in time?

Many thanks for any help!

Hoag

[hitechjunkie]

you could try setting field operation to none in DVD2AVI, then using the deinterlace filter, even field adaptive, in TMPGEnc. use the preview feature in TMPGEnc to see the result. during the preview, if it appears the video moves forward then slightly back, modify the field order setting, top/bottom field first.

[homerpez]

He's referring to the "Even-Odd" test in TMPGEnc. You go under "Inverse Telecine" (I think), and select "Eved-Odd" on the choice list, then click and hold the scrollbar above to see the movie run through forwards. If it stutters, flip fields. If it runs smoothly (but slowly), your field order is correct.

Keep in mind you may have a weird one, where you have to run IVTC manually (or have TMPGEnc do it automatically, it takes time)...

Also, are you trying to do a 23.976-frame/sec encode? Or are you trying to do 29.97? For VCD? Or SVCD? It makes a difference.

For VCD, never go from "Forced FILM" rate to an 29.97 encode. Or, leave the operation on "NONE" and try to do a 23.976 encode. Both will cause problems.

Gotta go, boss is coming

[hitechjunkie]

<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 2001-08-31 09:35:47, homerpez wrote:
He's referring to the "Even-Odd" test in TMPGEnc. You go under "Inverse Telecine" (I think), and select "Eved-Odd" on the choice list</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR size=1 color=black></TD></TR></TABLE>

actually i wasn't suggesting inverse telecine at all.

i was just suggesting the use of the deinterlace filter on a 29.97fps interlaced source to a 29.97fps VCD and using preview (click File->Preview) to view the results.

<font size=-1>[ This Message was edited by: hitechjunkie on 2001-08-31 09:55:27 ]</font>

[Hoagie]

Thanks guys -- I'm running a few tests to see how your suggests work in my situation.

A little more information on the final results, if it makes a difference...

My end product is a DVD complient MPEG2 stream (.m2v, not the System Stream). I am ripping the video using SmartRipper and then re-authoring a DVD (using ReelDVD) and adding subtitles. I am wanting to bring the file size down in order to fit more information onto the DVD-R, so I am playing with the 2 Pass VBR bitrate... unfortunatly I have this problem that is keeping me from my goal.

The end video must be 29.97 fps.

<font size=-1>[ This Message was edited by: Hoagie on 2001-08-31 11:06:33 ]</font>

[Hoagie]

Many thanks hitechjunkie and homepez!

The video is looking A LOT better! I'm still working on a few smaller issues, but the above suggestions cleared up the major ones!

Thanks!

[kriskim]

hoagie,

before doing anything, you should run [preview] in dvd2avi and let it play for a bit. frame rate should say 29.97fps. the video type will be NTSC or FILM [or a percentage of either]. if it's ntsc, and the frame type says INTERLACED, that means that they did a 2:3 pulldown themselves, and interlaced the movie to run at 29.97. if it says film, then that means that it's still a nice 23.976fps but they inserted rff flags for an on-the-fly 2:3 pulldown that the player does. if it's the latter, encoding is easy. choose FORCE FILM, then encode in tmpgenc with 3:2 pulldown on playback . that will encode @23.976fps (giving you better quality) but make the player do an on the fly pulldown.

if it's 29.976 ntsc interlaced (Which from what you describe it is), it's more difficult to get the best quality. don't check force film. in tmpgenc, rather than deinterlace (as that just gives you a blurry image), try your hand at an inverse telecine (tmpgenc makes it very easy, as they have a fairly good automatic ivtc feature). not only will your video be less blurry, the quality will be even better at your bitrate since you'll be really encoding at 23.976fps.

[Hoagie]

Thanks kriskim -- lots of info!

The video actually switches between NTSC and FILM. I am currently working with a short clip that switches from FILM (Progressive) to NTSC (Interlaced) at least once.

My end result *must* be at 29.97 fps, since my end result is a DVD and I am forced to that due to specs.

Do you have any suggestions on dealing with this flipping of formats during playback?

Many thanks!

Hoag