18fps

puck1263 wrote on 7/25/2016, 4:21 PM

I am having my analog 8mm film digitized. Once I edit, I'll want to burn to blu-ray.
Files will be 1080p but retain 8mm native 18fps.

I'm planning to use Sony DVD Architect Pro 6.0 build 237 for blu-ray burning. Will Architect Pro retain 18fps, or try to change to 24fps? I'd like to stay at 18 if I can. I don't see a project properties choice for this.

Comments

Eagle Six wrote on 7/25/2016, 4:56 PM

Hi Puck,

I think you will have to render out to 24p, then put it in DVDA6. To my knowledge there is no standard in Blu-ray for 18fps.

Best Regards.......George

videoITguy wrote on 7/25/2016, 6:15 PM

puck1263 - the first question for you is that given the film shot at 18 fps - who is doing the video transfer and at what effective rate on what media in what format.

There is about 0 chance that the media transfer will be at 18fps and maintained as such in the media. In other words your video coming to your house will already be at 24fps effectively and will readily integrate into a Blu-ray workflow.

Depending on the particulars of your video transfer - it is possible that the overall projection speed may appear to be slightly speeded up. This can easily be counteracted by setting speed in VegasPro to slightly slow the clip down - then output stream for Blu-ray will be ready for the 24fps authoring.

puck1263 wrote on 7/26/2016, 7:10 PM

Those doing the transfer can do no pulldown (scan at 18fps and give me an .avi at 18fps) or pulldown to 24fps, or 29.97. I'm debating between 24 or 18.
I'm leaning on 18, editing, and letting vegas render to 24p for blu-ray.

videoITguy wrote on 7/26/2016, 7:26 PM

What happens at the scanner is important - but in fact what you get as delivered media is going to make the most difference in how you treat the video clip within VegasPro to create the compatible Blu-ray media stream. See earlier post.

Chienworks wrote on 8/5/2016, 4:36 PM

I would certainly choose the 18fps version since they offer it. That way you're getting an exact 1:1 frame by frame copy of the original movie. You can always change it to whatever you want or need later.

Another option is to simply give people copies of an 18fps file for them to play on their computers if they can. The nice thing about this is that it will play at 18fps just like the original movie, with no frame rate conversion. It won't allow for fancy menues, but often menues are overblown and not terribly useful anyway.

corug7 wrote on 8/11/2016, 4:34 PM

You might consider rendering to 29.97i instead. Rendering 18p to 24p from Vegas will result in either frame blending or repeated frames, depending on whether you disable resampling or not. If you place your 18p clips on a timeline and disable resampling, then render the clip to 29.97i, Vegas will correctly pulldown the frames to fields, resulting in smoother motion.

Another option is rendering in a program that uses optical flow if you want to keep your files progressive, but that is also not foolproof and can result in some nasty artifacts.

ralph-nelson wrote on 8/28/2016, 4:43 PM

I have seen 18fps transfered at 15 fps, which would give you 2 video frames or one depending on whether you used progressive or interlaced. The result was excellent image quality, and the lower frame rate was not really noticeable.

Arenel