MacGyver Season 1 R1 DVDs - any fix for (bad?) telecining? are these Hybrid?

[JumboMaverick]

I was in the process of backing up my MacGyver season 1 region 1 DVDs when I noticed something strange. First off, with a little tweaking to Decomb 5.2.1, I can get most episodes to properly IVTC with these settings:

Telecide(order=1,guide=1,nt=50,vthresh=35,gthresh=4,chroma=true,hints=true).Decimate()

Only thing that needs tweaking from episode to episode is the vthresh up/down a few points.

My problem is, that the source DVDs sometimes have 3 interlaced frames in a row. I have never seen this before and was curious why it exists (bad telecining?) and if it's possible to fix. Let's take episode 1x20 The Escape for example. I attached a sequence of 5 frames (0,1,2,3,4) to this post in the rar file here (http://home.alltel.net/aanker/macgyver_1x20.rar).

Now, what happens on the original DVD source is, frame 0 is progressive, frames 1,2,3 are interlaced, and frame 4 is progressive again. My IVTC settings correctly choose frames 0,4 and drop frames 1,2,3. But, it introduces a slight jerk in the motion. It simply skips over to many frames and introduces jerky playback. This only happens a few times per episode and only on certain scenes. Does anyone know exactly what is going on, and if this can be fixed (automatically?) I basically need it to also be choosing frame 2 and deinterlace or blend it to smooth playback again. It's rather annoying seeing a little skip every now and then. Is it possible that these MacGyver DVDs are slightly hybrid? Thank you for any help/information you can give me.

[Chainmax]

I'd be very interested too in knowing how can you tell wether the movie is a standard 3:2 telecine or not from looking at the interlaced-progressive frame sequence it shows. I remember that when trying to backup my "Grave of the Fireflies" DVD, I got a 4 progressive-1 interlaced sequence and I was still recommended to use standard IVTC. Try using tritical's TIVTC and see if it works.

[Revgen]

According to this site (http://www.thedigitalbits.com/reviews3/spinsheet022505.html#mac), although the show was shot on film, the original masters were created on analog video instead of film stock.

This may be your problem.

[JumboMaverick]

I tried out TIVTC on episode 1x20 and it seemed to clear up the jerky motion problems. I'm going to encode the entire episode and do some testing to see if it really does a better job on this then decomb did. Thank you for the tip!

I think the analog video does have something to do with the problem, but TIVTC seemed to have fixed it... more testing is required though.

[JumboMaverick]

Well, after a few test encodes, TIVTC appears to have fixed the jerky motion that was the result if I ran the video through Decomb. On the other hand, TIVTC introduced a few new, different parts in the video with jerky playback; ones that Decomb successfully IVTC'd. Oh well, this just goes to show us that no IVTC is perfect, and if I want the absolute highest quality, I'll need to do this manually to some degree. Or, I can scrap .avi altogether and just make DVD-R backups... Just thought I'd share my findings.

[Chainmax]

Maybe it is a hybrid, you should read Decomb's and TIVTC's readmes, or post a small vob sample here so we can better help you.

[JumboMaverick]

Hi, sorry it's taken me so long to reply. School has kept me extremely busy and I haven't had a chance to mess around with this alot. I attached a small sample (10 MB) from episode 1 that Decomb doesn't IVTC properly. I renamed the sample as a *.txt, so obviously rename back to *.vob. Messing around with TIVTC, 2 pass VFR with MKV seemed to have fixed 99% of all problems I've had with encoding this. Only 2 or 3 interlaced frames slipped through, which is acceptable to me, since in the end I'll probably be watching these on TV via my Xbox. But interestingly enough, the timecodes file that MKV generated shows this episode to be about 4% video, and 96% film. So I guess these are a hybrid to an extent. I haven't tried any other episodes yet (finals week starts tomorrow), but I'm sure I'll get similar results. I think 2 pass VFR with MKV might very well be the best method for encoding this series. Any other input is always appriciated.

[DryFire]

I'm not seeing an attachment or pending attachemnt with your post jumbo.

Finals start tomarrow for me to :scared:

[Leak]

I'm not seeing an attachment or pending attachemnt with your post jumbo.
I doubt that the forum allows attachments that big or that attachments of that size (10MB) are wanted here.

@Jumbo: use one of the many file sharing services on the internet to upload your clip, and post a link to it here.

[JumboMaverick]

I didn't think the forum would allow such a big attachment, but it didn't yell at me when I tried. So I figured it was fine. But anyway, I upped it to YSI.

http://s64.yousendit.com/d.aspx?id=2OQHS7DX28LLT11J59F93EEER6