Anything wrong with rendering 24p from 60p footage?

D

digexpressions

Active member
I usually shoot 60p and render my final projects 30p. But this has given me some issues when dealing with bluray, since the format seems to only support 60i and 24p. So I'm thinking of rendering my next project 24p. Is this something that is commonly done?

30 from 60 seems logical since half the frames are just going away. What happens to the extra 6 frames when going to 24 from 60?
 
blu-ray supports 720p60 , and that would probably be the ideal choice since you shot 60p

For frame rate conversions 60p=>24p, you either get blends (ghosting), or jerky playback from decimated frames. More advanced conversions seek to generate new intermediate frames (e.g. twixtor, pixel motion in AE) , to get better playback but have various levels of artifacts
 
Don't like the video look of 60 frames. So 30p or 24p is needed. I'm rendering out a test project right now to see what kind of playpack I get. If it's too noticeable, I'll go back to 30p. Thanks.
 
Simply for having the option of slo-motion. If it wasn't for the slo -mo, I'd shoot 24p. These are wedding shots. short form will have slo-mo while the long form using a lot of the same shots will be at regular speed. Pre-selecting which shots will be used for slo-motion is not an option, since I don't know what will be slowed down until after I review the footage. Figured 60p would be the best thing, since I'd have the option of slowing anything down. And then render out to 30p to get rid of the 60fps video look. Works out great for DVDs, but the whole 30p bluray thing is hindering my workflow.
 
Smifis said:
wouldn't 60i be an option?
Click to expand...

It's an option for blu-ray , but 60i has the same "look" as 60p . Both have 60 temporal samples per second. So he would probably reject it by the same reasoning

@digiexpressions - your clients will definitely notice the dropped frames or ghosting for typical 60p=>24p conversions. It's painfully obvious to even casual observers.
 
I suppose.

60i deffinatly looks like the best option in this situation, or perhaps you could try rendering it out to 30p first, and then changing this to 6oi. I'm not sure how this would look but it may be worth a try?
 
Yeah, this is what I've been doing. Rendering out 30p and then making a bluray with the 60i settings. The problem is that DVD Architect re-encodes everything and it takes an eternity in addition to having to recompress an already compressed video. Was trying to avoid that.
 
Initially, you could encode in a lossless codec such as Cineform or a voisually lossless codec such as DNxHD
 
digexpressions said:
I usually shoot 60p and render my final projects 30p. But this has given me some issues when dealing with bluray, since the format seems to only support 60i and 24p. So I'm thinking of rendering my next project 24p. Is this something that is commonly done?

30 from 60 seems logical since half the frames are just going away. What happens to the extra 6 frames when going to 24 from 60?
Click to expand...


The real answer depends on your workflow in post.

In Premiere Pro CS4 it should be fine. In Premiere Pro CS5 it will be fine. There's genuine logic to shooting everything in 60P with AVCCAM. I get the feeling the P2 crowd doesn't understand that.

The major drawback is you're stuck in 720. But, if that's not an issue, then you're fine.

There's one more thing that I've only tested to a very limited degree at this point. The upscale feature in Premiere Pro CS5, at first glance, appears to be impressive as hell. The very first thing I did was upscale 720/60p to 1080/24p -- and at first glance it was magnificent. Again, that was just a "first glance" -- but if it turns out to be an accurate observation -- the value of the HMC ticked up a bit.
 
You must log in or register to reply here.
Back
Top