What resolution and ratio do you use for 60fps in 5DMIII?

[thapapawan]

I have been using 1280 settings for 60fps video but recently my friend told me I can shoot in slightly higher frame size for slomo.

I would like to know how you guys are setting up for the slomo look in RAW.

Thank you.

[mattcraigthomas]

Without exception, I aim to capture the highest quality digital negative possible. That means I'm always at 1920 pixels across, and adjust the aspect ratio to match or exceed the project height after the (5÷3)x vertical scale.

The only drawback is the short record times, especially if you're shooting for 1920x1080, but depending what you're shooting, that can be overcome with a little planning and good timing.

I'm looking forward to stepping down to 12-bit capture when it's integrated into the nightly builds, and hopefully lossless compressed too, as this should enable longer record times.

[thapapawan]

Thanks for replying. I am talking about shooting in 60 fps. We can't shoot in 60 fps in 1920. So, I am looking for the best ratio/reso for the slomo.

[mattcraigthomas]

As am I. 50p and 60p at 1920 pixels wide is definitely possible with the 5D Mark III; I've been doing it for more than two and a half years.

Unless I'm missing the point, obviously the best aspect ratio is whatever matches or exceeds the height of your project, and the best resolution will always be the highest that allows you to record for as long as the shot requires.

[cmccullum]

As am I. 50p and 60p at 1920 pixels wide is definitely possible with the 5D Mark III; I've been doing it for more than two and a half years.

Care to share your settings, and how long you're able to record?

[thapapawan]

Are you kidding? I am sure it is impossible to record in that frame rate at 1080p. Maybe for 3 sec?
 
Read this: http://www.magiclantern.fm/forum/index.php?topic=8875.0

[MitchLally]

mattcraigthomas is talking about mv720.

1920 x 672 stretched x1.667 in post.

You can get up to 6 seconds at 14 bit with a fast enough card. Drop to 10 bit you can record over 1 minute.

[mattcraigthomas]

It's either impossible, or maybe you can record for as little or as long as 3 seconds, but it can't be both! 

5D3.123 firmware, August 24th 2016 build. Haven't had a chance to test the new January 2017 build yet. 14-bit MLV with sound. 'Global Draw' and 'RAW Zebras' on. 'Shutter fine-tuning' used to achieve 180º shutter for 60p recordings. Lexar 32GB/64GB 1000x CF, will eventually get the 256GB 1066x to make life easier!

In the Magic Lantern menu, I have the following selected:

Resolution - 1920x1080
Aspect Ratio - 16x9

In the Canon menu, I change 'Movie rec. size' and 'Video system' to select the frame rate I want. The above is true for 24p, 25p and 30p. By changing the Canon menu options to 50p and 60p, and nothing else, the Magic Lantern menu will now read:

Resolution - 1920x648
Aspect Ratio - 16x9

Once scaled vertically by (5÷3)x, that gives you an image with a pixel count of 1920x1080.

Unless I'm mistaken, that's the best possible 50p and 60p image you can get out of the 5D Mark III. I understand 3x3 binning has been enabled with the newer crop mode, although 50p and 60p is capped to crazy-wide!

I just ran some tests, this is what I got:

1920x648, 16x9 (makes 1920x1080) 50p: ~ 400 frames, 8 seconds real time, 16.5 seconds playback at 23.976p
1920x648, 16x9 (makes 1920x1080) 60p: ~ 250 frames, 4 seconds real time, 10 seconds playback at 23.976p

1920x576, 2:1 (makes 1920x960) 50p: ~ 700 frames, 14 seconds real time, 29 seconds playback at 23.976p
1920x576, 2:1 (makes 1920x960) 60p: ~ 300 frames, 5 seconds real time, 12.5 seconds playback at 23.976p

1920x490, 2.35:1 (makes 1920x817) 50p: ~ 3000 frames, 60 seconds real time, 125 seconds playback at 23.976p
1920x490, 2.35:1 (makes 1920x817) 60p: ~ 550 frames, 9 seconds real time, 22 seconds playback at 23.976p

Didn't bother testing 1920x482, 2.39:1 (makes 1920x803). Theoretically, a few more frames than above.

While we're on the subject, I really wish there was a 1920x480, 2.4:1 (makes 1920x800) option, ideally in both slow-mo and standard frame rates, please. There's really no such thing as "2.35:1" or "2.39:1". Most modern movies in that sort of aspect ratio are 1920x800, which is precisely 2.4:1. It may potentially offer a few more recorded frames per shot in slow-mo, and a few more seconds of footage on a card. But perhaps most importantly, 480x(5÷3) is exactly 800, resulting in a perfectly accurate vertical scale, just like 2:1 and 16x9. If any developers are reading this, I'd really appreciate this addition, thank you! 

Obviously these record times are nothing spectacular, and definitely make things difficult when the camera is mounted on a gimbal or when shooting live event stuff, although you could also drop the resolution too. But for me and what I shoot, it's perfectly workable! 

[dia3olik]

hey matt!

I agree with you 1920x800 is the way to go!

Ah side note...how is the scaling in camera from 1920x1080 to 1920x648?

I mean when you desqueeze it vertically in post how is as far as aliasing/moire/artifacts is concerned??

Thanks!

[mattcraigthomas]

It's not bad, just a little softer. It's definitely better suited to shallow depth of field, close up shots, with no hard, straight, diagonal lines in frame. I've only seen aliasing a couple of times, but that was in shots that perfectly contradict that advice!

[RenatoPhoto]

The highest detail in ML can be achieved in zoomed mode where no sensor lines are skipped. 
In the case of 5D3 and for 60 fps the best solution is to use the Crop Module (experimental) which gives you the highest detail and allows you to record at 60 fps at 1:1 (no line skipping).  This means that the resulting image is not squeezed.  The only drawback is the limited resolutions (frame size) and ratio.  The resulting image is 1920x648 and not larger but I can record 14 seconds.  If I chose a smaller aspect ratio I get less height but I can record continuously.  Also you can lower the size to 1728x584 you can record continuously at 60fps and 1:1 detail.  Another advantage is that the preview, although a little distorted, is center, in full color so framing is a breeze!

More details on crop module here: http://www.magiclantern.fm/forum/index.php?topic=17021.0

Download the experimental build from 5D3 and EOSM here: https://builds.magiclantern.fm/experiments.html

Edit: forgot to mention that I selected 10bit recording (available now) to extend the recording time.

[mattcraigthomas]

Sorry, but I have to disagree. It's in no way "the best solution".

Sure, you gain per-pixel sharpness by sampling 1:1, and it's super handy if you wanna turn your 100mm f/2.8 into a pseudo 300mm f/2.8. But the aspect ratio isn't even close to being a useable standard, you'd need a really bloody wide angle lens for anything close to resembling a wide shot, I'm assuming noise would be more visible and you totally lose the magic of the 'full frame look'. If I wanted to shoot with a 3x crop factor, I'd use a Blackmagic Micro Cinema Camera! 

The full frame 3x3 binning implemented in the new crop mode is really interesting; I'd love to shoot 50p and 60p without the need to correct it. But with the resolution being what it is, you'd need to scale it up anyway, throwing away some of the width in the process, which also makes wide angles and framing more difficult, so it's really not practical!

[RenatoPhoto]

You are right!  It will not be the best solution for all circumstances but it may be the best for others.  It will be the sharpest, it will not have any aliasing, it will be framed exactly as you see it, and also you can get it pretty close to 2.35:1 if you sacrifice some of the width.  I can get continuous recording by using crop mode at 1:1 with aspect ratio 2.35:1 by setting the width to 1536 and the aspect ratio to 4:3 giving me 1536x672 at 60 fps.

Agreed that in the case you want a wide angle shot then the crop module is not your friend. 

[erikbaldwinson]

FPS over-ride 37, 38, or 39 FPS (I think 40 locks up) in 24p 1080p. At 10bit you should be able to get a decent length recording. Slowed down to 24 depending upon speed of movement in frame is a convincing and clean slowmo.