Is it OK to use 24p capture all the time?

[turk690]

I've started giving my clients HD video on BD-Rs since the last two months, and have been seeing to it that the chain is 60i from shooting to authoring, taking a cue from good ole NTSC. But I see that all Hollywood movies are 24p on blu-ray, with the BD players accomodating that very well, and all of the current HD camcorders I own to shoot events are capable of genuine 24p (distinctly NOT 60i tagged as 24p, which is also an option on Canon). What problems can crop up if I shoot and author on BD all the way in 24p instead of 60i?

[mrswla]

You should always decide, with the client, what the end format will be before starting the project!

[mrswla]

For instance, if I hired you I would want it in 60i (or 30p) not 24p.

[edDV]

I've started giving my clients HD video on BD-Rs since the last two months, and have been seeing to it that the chain is 60i from shooting to authoring, taking a cue from good ole NTSC. But I see that all Hollywood movies are 24p on blu-ray, with the BD players accomodating that very well, and all of the current HD camcorders I own to shoot events are capable of genuine 24p (distinctly NOT 60i tagged as 24p, which is also an option on Canon). What problems can crop up if I shoot and author on BD all the way in 24p instead of 60i?

You should know this if in business.

24fps (23.976 actually) progressive is very jerky unless shot from a stable tripod or Steadicam, with low depth of field lenses and ideal lighting. There are three main reasons to shoot 24p.

1. You need to release in both NTSC and PAL (Hollywood's main reason)

2. You need to transfer to film for cinema distribution.

3. You think 24p has an aesthetic value for your client*

Alts are 30p, 60p and 60i. Each has reason for being.


* the client calls this one.

[turk690]

My input and output are exclusively AVCHD and BD. I See the caveats for 24p, so OK, 30p then? The main reason I need progressive is I have to cull stills from the timeline. I have to carefully select which frame to pick on a 60i or I get jaggies galore.

[budwzr]

Then speed up your shutter, not reduce the capture fps.

24p is to simulate a film camera, which is low quality. You can always fake that in later, but if your original footage is low quality, then you have painted yourself in a corner.

And any fast motion is going to be blurry, as mentioned above.

[edDV]

Many variables but if stills cap is the main user requirement, then I agree with budwzr on 30p.

That is why you use 30p.

As for the video, it depends first on user format requirement. This comes down to motion jumps (motion sample rate). is it 24p, 30p, 60i/60p?

60i/60p works with Vegas but for some may be too smooth (video like). If so go for jumpy then shoot for 24p/30p.

I understand need for PAL release but not for jumpy look. Ask the client. "You want jumpy?" "I can do that".

[budwzr]

I have to carefully select which frame to pick on a 60i or I get jaggies galore.

Well, why don't you deinterlace it then? 60i deinterlaced can run at half speed to get slomo, or smooth velocity changes.

[edDV]

Snapshot in VLC will accommodate 1080i deinterlace. Blend deinterlace will be somewhat blurry, Yadif or Yadif2 will need some CPU grunt. Your i7-920 should handle it.

[turk690]

Thanks, edDV and budwzr.