sloMo rendering

Widetrack wrote on 10/28/2018, 8:41 PM

Using Vegas 15 Bld 387, I’m trying to render Mavic Air footage shot at 2720x1530, 29.97fps to output at 1080p, 29.97 for YouTube. Most everything is good, but I can’t get good slowMo.

I read a bunch of Nick’s and others’ posts on the subject and followed their suggestions:

  • Made sure project and source framerates were the same
  • Slowed clips by 50%
  • Disabled resampling and deinterlace
  • Tried both enabled and disabled GPU acceleration
  • Use MainConcept AVC/MVC
  • Preview monitor set to Preview (Auto)
  • Closed and re-opened Vegas several times after changing preferences as suggested

I rendered samples from the original source, slowed by Velocity envelope; from a sample I created by rendering the un-slowed original to 1080 and then slowing it by the envelope; and with Video preview Preferences set to both project size (2720x1530) and the size it goes to (680x382) of its own volition which I can’t figure out how to change to 1080 or anything else .

Each result plays back with the same stuttering, jerking motion, in what appears to be the exact same way. They all malfunction in the exact same way.

Any help would be greatly appreciated.

 

One other question: Can I render to a track in an open Vegas project instead of a file?

Thank you all.

Comments

Kinvermark wrote on 10/28/2018, 8:49 PM

To be expected. You haven't got enough frames. Best would be to shoot at 60p and then your slow down to 30p or 24p will be smooth.

Alternatively, you need software to interpolate frames: Twixtor or Respeedr. Or different NLE like Resolve, Final Cut Pro,...none of this is great, but can be acceptable.

Gopro Studio has FLUX fro Cineform files, but is no longer supported and is hard to use without crashes.

 

PS Re your last question: Yes, but will still create a file.

astar wrote on 10/28/2018, 11:51 PM

As Kinvermark said in the prior post, having more recorded FPS will give you smoother slo-mo animation.

One thing you might try is exporting your slo-mo source material as an image sequence .PNG. Then reimport the image sequence to the timeline, this gives a little better control over playback speeds.

Widetrack wrote on 10/29/2018, 12:15 AM

Thank you both for your replies.

Kinvermark, Can you tell me how to render to a track? I looked all around but didn't find anything.

astar: That's an interesting idea. How would I control the playback speed of a bunch of .png's?

Grazie wrote on 10/29/2018, 12:51 AM

(@Kinvermark : Apologies for jumping in .... )

@Widetrack : Render To New Track.

john_dennis wrote on 10/29/2018, 12:52 AM

"How would I control the playback speed of a bunch of .png's?"

By definition, "a bunch of .pngs" don't have a frame rate. When you add them to a new project each .png takes the period of one frame at the frame rate of the Project. You can time compress or stretch from there.

Widetrack wrote on 10/29/2018, 9:48 AM

john: That sounds like a long process.

Grazie: How do I make it do that?

 

Kinvermark wrote on 10/29/2018, 10:51 AM

It's a menu option: TOOLS - RENDER TO NEW TRACK (CTRL M)

john_dennis wrote on 10/29/2018, 12:26 PM

"john: That sounds like a long process."

Some times it can be the best or only way to fix some things.

It doesn't help you now, but for the future, when your focus is slow motion you would be better served shooting at one of the higher frame rates offered by your camera.

Video Format 3840 x 2160p at 24/25/30 fps (100 Mb/s MP4 via H.264)
2720 x 1530p at 24/25/30/48/50/60 fps (100 Mb/s MP4 via H.264)
1920 x 1080p at 24/25/30/48/50/60/120 fps (100 Mb/s MP4 via H.264)
1280 x 720p at 24/25/30/48/50/60/120 fps (100 Mb/s MP4 via H.264)

Widetrack wrote on 10/29/2018, 1:05 PM

It's a menu option: TOOLS - RENDER TO NEW TRACK (CTRL M)


Thanks, Kindermark. That's a relief to learn.

 

Widetrack wrote on 10/29/2018, 1:06 PM

It sounds like shooting at a higher frame rate is the solution here. Thanks to all for the input.