a noob tries to encode animation to xvid (ivtc, deinterlacing...)

[nosaj56]

Hello,

I am trying to encode a mid 90's cartoon sourced from interlaced dvd and progressive tv caps to xvid using gordian knot. I've tried encoding to 30fps deinterlaced and 24fps deinterlaced. Neither look too great. I know that I probably haven't provided enough information. I have no idea how to make my own avisynth script. I've read the respective guides many times. Any help would be appreciated. Thank you.

[jggimi]

Hello, and welcome to the forum....sourced from interlaced dvd and progressive tv caps...I'm confused already. Is this the same problem with multiple sources? Or is this a disc inserted into a player and captured? Is the capture analog, and if yes, at what resolution and with what codec? Was this a digital cap? If so, was it DV, DVB, or a transport stream?

Without knowing anything about your content, lets move on:

Normally, with analog capture of interlaced material, the cap is interlaced. But if you don't use a height of 480 (for NTSC) on the capture, you won't be able to deinterlace it. A half-height capture at 240 will not need to be deinterlaced, since you'll effectively only be getting a single field anyway.

There is also a difference between interlaced content and Telecined content. The latter looks interlaced, but isn't, and the original progressive frames can be reassembled. Interlaced content should not be Inverse Telecined, since it wasn't 24fps content to being with. Analog capture of Telecined content will retain Telecining, and can be Inversed Telecined.

The IVTC tutorial (www.doom9.org/ivtc-tut.htm) may be useful to you, though it hasn't been updated in a couple of years and most if not all of the software has had updates since. And at least one tool, DVD2AVI, has had a name change -- you know it as DGIndex.

If this is overwhelming, you might consider trying Auto GK. It automates the manual analysis recommended in the IVTC tutorial.

[Edit: clarity]

[nosaj56]

Hello, and welcome to the forum.I'm confused already. Is this the same problem with multiple sources? Or is this a disc inserted into a player and captured? If so, is the capture analog, and if yes, at what resolution and with what codec? Was this a digital cap? If so, was it DV, DVB, or a transport stream?

Without knowing anything about your content, lets move on:

Normally, with analog capture of interlaced material, the cap is interlaced. But if you don't use a height of 480 (for NTSC) on the capture, you won't be able to deinterlace it. A half-height capture at 240 will not need to be deinterlaced, since you'll effectively only be getting a single field anyway.

There is also a difference between interlaced content and Telecined content. The latter looks interlaced, but isn't, and the original progressive frames can be reassembled. Interlaced content should not be Inverse Telecined, since it wasn't 24fps content to being with.

The IVTC tutorial (www.doom9.org/ivtc-tut.htm) may be useful to you, though it hasn't been updated in a couple of years and most if not all of the software has had updates since. And at least one tool, DVD2AVI, has had a name change -- you know it as DGIndex.

If this is overwhelming, you might consider trying Auto GK. It automates the manual analysis recommended in the IVTC tutorial.

[Edit: clarity]

I've only tried encoding the dvd sources so far. I captured the tvcaps from digital satellite using s-video at 720x480 and in mpeg2. The software I used to capture gave me the option of writing the mpeg2 to disk interlaced or deinterlaced. I chose deinterlaced since I thought it would save me a little trouble down the road. I'd really like to master the manual tools of gordian knot and avisynth if possible. Thanks. :)

Edit:
Here's a few screenshots from my efforts:
(dvd, encoded at 24 fps, field deinterlaced (no blend))
http://img383.imageshack.us/img383/7428/vlcsnap58907624fpsint4zz.th.jpg (http://img383.imageshack.us/my.php?image=vlcsnap58907624fpsint4zz.jpg)

(dvd, encoded at 24 fps, field deinterlaced (no blend))
http://img383.imageshack.us/img383/8375/vlcsnap58955024fpsint1zs.th.jpg (http://img383.imageshack.us/my.php?image=vlcsnap58955024fpsint1zs.jpg)

(dvd, encoded at 30 fps, field deinterlaced)
http://img383.imageshack.us/img383/5124/vlcsnap1432364030fps5ob.th.jpg (http://img383.imageshack.us/my.php?image=vlcsnap1432364030fps5ob.jpg)

(dvd, encoded at 30 fps, field deinterlaced)
http://img383.imageshack.us/img383/9612/vlcsnap1432373630fps4rf.th.jpg (http://img383.imageshack.us/my.php?image=vlcsnap1432373630fps4rf.jpg)

[Guest]

You should have captured interlaced. You've foreclosed any possibility of doing IVTC by capturing deinterlaced.

For the DVD stuff, apply IVTC where possible. The easiest way is to use Force Film mode in DGIndex.

[jggimi]

This material in your examples was all DVD sources; if DGIndex FILM percentage is lower than 95% (best practice is 95%, but I personally use anything less than 100%) then a manual examination of the frames is called for, prior to doing an Inverse Telecine, per the IVTC tutorial I referenced above.

Single frames will not tell you if the source is interlaced or Telecined, you must examine a sequence that contains movement.