horizontal frame scramble

[PPJSmith]

I followed the steps for ripping a dvd to svcd (480x480) w/o 8GB free. I am getting a problem when I play the svcd. In action scenes I get a sorta of blurring effect. When I zoom in on it it appears that the previous frame is still visible. I think that every other horizontal line is displaying the previous frame. Does anyone have any suggestions on fixing this? I tried it at 1500 bitrate and also 2500 but both cause same problem.

[stanwebber]

it's called interlacing. need to know what you did to determine how to fix it or whether it even needs to be fixed

[PPJSmith]

Well I used DVDx to rip it and TMPGEnc with the VFAPI plug-in to encode it to MPEG2.
(http://www.vcdhelp.com/dvdbackup.htm)
I played with the Interlace filter in DVDx last night and I put it on Interpolate and it fixed the problem, but in the help file it says that there will be a quality loss. Is there another way to fix it without any quality loss. and if not exactly how much quality is lost with this filter.

[stanwebber]

i took a look at that guide and i see lots of potential problems because of its broad approach. first off, is your source ntsc or pal? what template are you using in tmpgenc? yes, quality will take a big hit if you deinterlace although it is unavoidable in some circumstances. the fact is mpeg2 should be interlaced on playback, so nothing may be wrong at all. how are you viewing the mpg(dvdplayer? windvd? tmpgenc preview?) as this might explain away any perceived problems

[The VidKid]

Hhm.
Well, there are several "broad" approaches to this problem. I don't know much of how you went about doing your SVCD, but let's see if I can help you out.

Let's take an example:
When ripping DVDs to DivX AVI or MPEG-1, interlacing causes the "spikey movements". You can either de-interlace or use progressive framing. With de-interlacing, you can have the frame rate at just about whatever frame rate you want, including 30fps. With progressive framing, the frame rate is dropped to 24fps. Progressive framing gives smother lines (i.e. the outline of someone's face), and de-interlacing gives clearer quality (not much, but noticeably sharper picture). These are how most DVD rips to DivX AVI or MPEG-1 are usually done.

Now, what you can try is either use TMPGenc's De-interlace option (double click on it to fine tune your options), or try the progressive framing option in FlaskMPEG, and then convert the output of FlaskMPEG to VCD or SVCD using TMPGenc.

The strange thing is, the straight to SVCD from DVD should work fine, since the DVD should automatically make use of the interlacing. My guess is you're using a DVD-ROM. Some DVD-ROMs can't handle the interlacing of some DVDs (i.e. CGI movies), unless you have a really good DVD-ROM paired with a powerful Video Card (because it WILL need all the hardware power it can get).

Anyway, I've always used the 24fps progressive framing approach to get rid of interlacing problems with all my DVD to DivX AVIs and it's always worked fine. But, your DVD to SVCD problem.. hm... not quite sure. I hope this post will somehow spark a method that will work for you.

[PPJSmith]

It is a ntsc dvd. I noticed that the video is being distorted straight out of DVDx, (so it is still distorted in the following stages also [as mpeg file, then also on standalone DVD]) I am also using SuperVCD NTSC format in tmpgenc with no filters. If I use the progressive framing filter and it drops my frame rate to 24. Will tmpgenc convert it back to 29.9 (ntsc), and will this cause a drop in quality? I will try the tmpgenc de-interlace filter and see how that works. If ya'll have anymore suggestions let me know. Oh yea? What would be the best program (gives best quality) to convert from DVD's vod to avi. I'm going to try dvd2avi, if you know of a program that will produce a better quality let me know.

[stanwebber]

assuming dvdx output the correct ntsc framerate(29.97fps) then ostensibly everything should be ok, but if it looks wrong on your standalone dvdplayer then something is wrong. i dont know enough about the internal workings of dvdx to single it out as the problem, but moving to smartripper/dvd2avi/tmpgenc method is a welcome suggestion. one last thing you might try is swapping the field order on tmpgenc advanced tab(this remedy is for jerky, stuttering video which you did not specifically mention)

[PPJSmith]

Ok I fixed the interlace problem using tmpgenc's deinterlace filter. But now I have a jerking, jittering problem. Someone suggested swapping the field order to fix this. Can someone give me more information on figuring out which field order is the correct one. Also if I select the correct field order will I still have to use the deinterlace filter, because I read that this filter causes a quality drop. Also I just found out also that doulble clicking on the interlace filter brings up some options, will any of these options help my problem?