2 movies in DVD LAB Pro

[peterhun]

1 movie is PAL and other is NTSC. I've demuxed the NTSC to Elementary Streams and resampled to 25.00 FPS. The sizes now are 720 x 576 and 720 x 480.

I put these into DLP and it gave me an error message about being different sizes and I need a separate VTS or some such thing, but I went ahead and compiled the dvd with both movies on one disc with a menu to select each one. The result is ok.

What I noticed is that the vob's are joined consecutive in numbering. I'd like to keep the vob's to each movie as separate VTS_01.1 etc then VTS_02.1 etc with one menu to select either one.

Do I need to resize the 720 x 480 to 576 lines or leave it. I think most players play both formats don't they?

I hope someone can advise on this thanks.

[guns1inger]

What you are trying to do is outside spec, and the way you are doing is more than a little crazy.

Technically, you cannot put PAL and NTSC on the same disc and a call it a DVD Video. DLP will allow you to do this, however you need to put them in separate VTSs, as DLP told you. This is easily done from the connection window by right-clicking on the tree and selecting Add New VTS. The PAL movie goes in one, the NTSC movie goes in the other. Given your player will probably play both formats, the disc should play OK, but there are no guarantees.

Your other option is to convert the NTSC video to PAL, which is a little more complicated than your half-arsed framerate conversion. Your approach is likely to give you more problems than just creating a mixed format disc.

[peterhun]

g'day guns1inger. The NTSC original rate was 23.97 and I used AVIDemux to change it to 25.00fps, it left the size at 720x480. Is this the wrong way to do this, then what prog should I use to get the avi (which has VBR audio) to my PAL specs.

[guns1inger]

Simplest way is ConvertXtoDVD.

The slightly longer method is to encode the avi to mpeg2 @ 23.976 fps (NTSC) with a resolution of 720 x 576 (PAL), then use DGPulldown to add pulldown flags for 23.976 -> 25 fps playback. This also has the advantage that you don't have to alter the audio length.

However in this case I would just convert NTSC to NTSC, PAL to PAL and create a non-compliant disc. The PAL players sold over here are pretty robust (OK, maybe Sony players wont)

[peterhun]

Thanks guns1inger.
Convertx does the job ok, makes 2 separate VTS's but I'd like more control over the menu and chapter points. So I used Convertx to convert NTSC to PAL. I joined the vob's using VideoReDo and saved it as Elementary streams. I put both movie sources into DVDLP and made my compilation, all ok.

But I notice that in the one that was converted from ntsc to pal that during fast motion I see lines across the picture. I think that this is called Combing, would this be right? Any suggestions how I could fix this, is it some sort of interleaving problem? I've read stuff about top field or bottom field first or progressive but I can't make enough sense from this.

[guns1inger]

The problem with most software format conversions is that they need to create the missing frames. Eg, 23.976 fps NTSC to 25 fps PAL requires that a new frame be created every second. To do this, most encoder will take two frames and blend them together. because there is a time offset between them, especially in motion scenes, you get ugly artifacts. The method I mentioned in my previous post, using DGPulldown, avoids this by encoding only the frames that already exist, and telling your player to create the missing frames on the fly. Hardware generally does a much better job than software in this regard.