ErikSwan

7 minutes ago, Luke Mason said:

8K refers to hardware accelerated encoding, downsampling is almost always a computationally intensive CPU task.

If you look at the readout modes listed on the IMX183 page, 2.7K readout is pixel-binned, it's then upscaled to 4K in the FOV mode. I don't think it's the sensor that's prone to overheat, it's the processor since it's not capable of hardware accelerated 5K downsampling (Sony's BIONZ chip was purpose built for this).

I'll quote the section from the Ambarella page (emphasis mine):

Quote

The combination of 8K video capture together with Ambarella’s advanced oversampling and image stabilization also enables higher video quality 4K video recording.

This seems to imply it can downsample 8K video to 4K.

Either way, we know the Ambarella H1 in the Phantom 4 Pro [1] can downsample the full sensor readout to 4K as shown by Cliff's chart tests, so the H3 should obviously be able to do it as well. I don't think the Ambarella SoC is the limiting factor here; there must be some other limitation, artificial or otherwise.

[1] https://madsrc.com/2016/12/08/inside-the-dji-phantom-4-pro/

On 9/10/2018 at 9:08 PM, Robert Collins said:

5) The DLog-M 10 bit h.265 profile is a huge step up from the Mavic Pro and is great in post. Unfortunately, the footage in DLog has horrendous lens distortion. Its easy to fix in post but rendering h.265 is pretty slow. (I am wondering whether it is best to transcode first for Premiere Pro.)

Do you have a profile you are using for correction in post, or are you just manually estimating the distortion parameters? I was also really struggling to edit the H.265 files in Premiere, but Resolve is much faster for me.

On 9/12/2018 at 9:18 AM, Luke Mason said:

Full FOV 4K is actually 2.7K upscaled, as the IMX183 sensor can either do full 5.5K readout or 2.7K readout, the Ambarella chip obviously cannot handle 5.5K supersampling.

See Table 3 Readout mode:

https://www.sony-semicon.co.jp/products_en/new_pro/may_2014/imx183_e.html

Do you have a source for this, or are you just guessing? The Ambarella chip in the Mavic 2 appears to be the H3 [1, 2] which should be more than capable of downsampling from the full sensor readout, seeing as the Ambarella H1 in the Phantom 4 Pro can do it, and the H3 can even capture and downsample up to 8K [3].

@Cliff Totten (who posted earlier in this thread), did some tests on the resolution of the sensor in the various modes, and it looks like Full FOV 4K does have slightly more resolution than the 2.7K mode [4], so it seems more likely to me that Full FOV 4K is using a pixel binning readout mode, rather than being upscaled from a 2.7K readout. Cliff's theory as to why the Full FOV mode is binned is due to sensor heating problems, which seems plausible to me.

Also, everyone is saying the sensor in the Mavic 2 is the IMX183, but is there actually any evidence for that?

Anyways, I think Cliff's test is a good argument for shooting in 2.7K instead of 4K if you want the full FOV. The resolution difference is barely discernible, so you might as well use that 100Mbps for better image quality/less compression rather than spending it on more pixels that aren't providing a real increase in resolution anyways. And hey, you also get 60p if you want it!

[1] https://mavicpilots.com/threads/possible-new-mavic-ii-ambarella-h-3-image-processor.45801/#post-538347
[2] https://tronicsfix.com/blogs/news/dji-mavic-2
[3] https://www.ambarella.com/products/flying-cameras/flying-cameras-products#H3
[4] https://youtu.be/EpETzfvbmD0?t=25m30s

Where does it say in the announcement that Blackmagic RAW will come to the Pocket 4K?

On 9/6/2018 at 4:07 PM, Snowbro said:

Looks good! But why so jumpy? What were the camera & post settings?

What do you mean by jumpy? Looks pretty smooth on my end.

Settings:
4K HQ (1:1 crop mode) @ 24 fps
H.265
DLog-M
Picture settings: +1, 0, 0

ISO 6400 (max in video mode)
f/2.8 (minimum)
I think shutter speed was 1/30 or 1/40 but I don't remember exactly.

With a little lot of temporal noise reduction, I'm getting some pretty impressive results out of this sensor.

Granted, there are some artifacts from the heavy NR, but it still looks quite usable to me.

Shot 30 minutes after sunset. For an idea of how little light there was, look at the headlights on the hill in the background at the start of the clip, the various phone screens you can see throughout, and the city lights in the background towards the end.

I haven't owned any of DJI's previous drones but I have a hard time believing any of the 1/2.3" sensors would have been able to get anything remotely looking like this.

From the Imaging Resource interview:
 

DE: I wanted to come back to the data-readout speed. Is the camera actually capable of recording video at 240 frames?

JK: No.

DE: Oh, because the codec isn't fast enough to compress and format it?

JK: Actually, we just didn't implement that functionality, but the DRIMe V and the sensor could do it. When the guys in R&D were working on the Samsung Auto Shot feature, they recorded live 28 megapixel, 240 fps "video" to help with the debugging. We didn't see there being an application for that, at least for very, very few people.

I saw on BMC User a thread with a letter from the head of Hot Rod Cameras. The gist is that the "limited quantities" = each dealer getting one (ONE!) Pocket Camera initially and about 3-4 weeks after that more quantities should arrive, hopefully. The 4k is even more delayed and won't ship with Raw.

Link: http://www.bmcuser.com/showthread.php?4836-BlackMagic-Pocket-Cinema-Camera-Update!!!!!

Good job, BMD.  :rolleyes:

I think the kowa LM8HC 8mm 1.4 is a winner: http://bit.ly/16OFjHI

Nice! I would wait before dropping $400 on it but it looks like if the image quality holds up this could be a nice, affordable, wide (and very fast!) prime.

Newest information:

The team tells me that we are still on track to start shipping before the end of July. I'm not sure if there will be more of an official update than that within the next week, but for anyone in the LA area, we will have cameras at our event on Thursday if you want to check them out.

(source)

And:

(source)

On topic: as of July 18th, the reps on the black magic site still claim that the team is working hard trying to meet the deadline. 

Source please? :) Edit: found it.

A more current auction. $9k http://www.ebay.co.uk/itm/Zeiss-8mm-T1-3-Ultra-16-Arri-PL-mount-/180918390524?pt=LH_DefaultDomain_0&hash=item2a1f938efc

Sooo.... who's gonna buy it and put it on the Pocket for shits and giggles? Would be an absolutely amazing lens...

To all those saying it's not late yet, you're right. It's not late yet.

And there is still a possibility that it will be to the distributors by July 31st and shortly to us thereafter, with RAW firmware and all. If that happens, I'll be satisfied and impressed with Blackmagic's ability to stick to their word this time and pull off a product launch in such a short period of time.

But I think we all know that's not very likely at this point.

Well, the plot thickens...
 
Quoting from here.
 

RAW is not likely to be ready for shipping but will be added later.

:rolleyes:

The item that I paid $1000 for was clearly advertised as having RAW recording capability. If the piece of metal and plastic and silicon that shows up on my doorstep doesn't have the ability to record RAW images, we're going to have a problem here.

I emailed B&H today asking about the status of the Pocket camera and where I was in the pre-order line. Here's the exact email:
 

Hi there, 
 
I pre-ordered the Blackmagic Pocket Cinema Camera they day it was announced (April 8, at around 1:30pm, to be exact, order #XXXXXXXXXX), and I was wondering if you could tell me my exact place in the pre-order queue for the camera. 
 
I was also wondering if you have any information on when you believe the cameras will start shipping. I know Blackmagic originally said they would be shipping in July, and you had the date July 25 on the item page until a few days ago. 
 
Do you still expect them to ship this month? If you have a date that you expect them to start shipping, or (even better), a date when you think I will receive mine based on my place in the queue, that would be great. 
 
Thank you!

Here is their response (my emphasis):

Disappointing, to say the least. I agree that if they are late again, they will be nothing short of a laughingstock in my mind. It's completely unacceptable. I think we were all very surprised to hear them announce a July shipping date in the first place, but we figured, well, they must be very serious this time, surely they wouldn't allow themselves to even come close to repeating the debacle of the BMCC?

Short of a very thorough and apologetic explanation, failing to ship in July will just make it look like they have a corporate policy of deception and enjoy lying through their teeth to their customers, especially since that they were (at least publicly) so sure it would be shipping in July less than a month ago. 

Meanwhile, I am hearing that samples that have been sent out to John Brawley and the New Zealand guy above do not even have RAW functionality yet, and that this may be coming in a "future firmware upgrade." If they end up shipping the camera without RAW recording ability, I will be even more shocked and angry than if it ships late. I put $1000 down for this camera for its RAW ability, as nice as the ProRes footage may be, and failing to ship with such a significant advertised feature will be nothing short of false advertising.