The list of shame fake 4K cameras and CMOS size

TeriTerryTarry said:
When I right-click > Properties > Details for the 2K and 4K Elephone Explorer Pro videos it doesn't show the Frame width, Frame height or Frame rate. How can I verify what these are? Details for other resolutions are shown.
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on linux you can use "mediainfo" from command line...
 
Gibson99 said:
yes, note the info in my screenshots above - it's from a git2 on the original firmware, set to 2160p. vlc plays it at the correct 16:9 ratio so that it looks correct. but if you use vlc to extract a frame, it displays in 4:3 instead of 16:9.
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Okay, so how does the player know to play it in 16:9 instead of 4:3? And presumably there's an algorithm in the player for interpolating the 2880 x 2160 to 3840 x 2160, correct? But further, none of this is really beneficial if you have a 1080p monitor or TV, is it? Won't recordings other than those in 1080p have been resized to play full-screen? Similarly, unless you have a true 4K Ultra HD recording, won't recordings you view on a consumer 4K Ultra HD TV have been resized?
 
jokiin said:
there's a flag in the header to tell the player how to interpret the file for display
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Is that the thing that says "Display resolution" in the screenshot?
 
jokiin said:
there's a flag in the header to tell the player how to interpret the file for display
Click to expand...
Yes there is a flag - same did old cassette camcorders (f.e. Sony) which took 1440x1080 - this was played as 1920x1080, stretched 1.333:1
 
So this is what I have with the Elephone Explorer Pro. The 2K video is 2560 x 1440 @ 30fps. The 4K video is 2880 x 2160 @ 24fps. But it appears a flag is included in the 4K data. Here's how the Properties > Details reads:

Video: MPEG4 Video (H264) 2880x2160 (16:9) 24fps 24513kbps [V: DataHandler [eng] (h264 high L5.1, yuv420p, 2880x2160, 24513 kb/s)]
Audio: AAC 32000Hz mono 96kbps [A: DataHandler [eng] (aac lc, 32000 Hz, mono, 96 kb/s)]

Other camera resolutions and frame rates are as Elephone claims. I've contacted them twice using their online support form, offering two of my different e-mails for reply but they've not responded. They also have a support e-mail address that I'll try because I want to be sure I give them the opportunity to respond. But so far the Elephone Explorer Pro does not appear to be a 4K camera as claimed.

Camera web page: http://www.elephone.hk/elephone-ele-explorerpro-specs-features-purchase
 
"All" 4K action cams only record 2880x2160 (cheap sensor, weak CPU .. you
cannot get more for $40 etc.) - up to 3840x2160 is pushed by player or
INTERNALLY by camera.

H8R is a "joke" ... 2880x2160/15fps are doubled to 3140x2160/30fps :(

d8k83txig9u3psa5s.jpg


I don't believe Sony IMX117 with ELE or other cameras ... this sensor makes up to 4096x2160/60fps
 
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TeriTerryTarry said:
Video: MPEG4 Video (H264) 2880x2160 (16:9) 24fps 24513kbps [V: DataHandler [eng] (h264 high L5.1, yuv420p, 2880x2160, 24513 kb/s)]
Audio: AAC 32000Hz mono 96kbps [A: DataHandler [eng] (aac lc, 32000 Hz, mono, 96 kb/s)]
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"24,513 kb/s" - that would be a good bitrate for 1080 HD ;)

The Gitup Git2 records 2880x2160 24fps at around 37,000 kb/s. (and doesn't claim to be 4K)
 
There doesn't exist a video format 2880x2160 - it is always shown as 3840x2160.
2880x2160 is only recording format. 99.9999987% of dealers name this "4K" :)
 
Pytha said:
There doesn't exist a video format 2880x2160 - it is always shown as 3840x2160.
2880x2160 is only recording format. 99.9999987% of dealers name this "4K" :)
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Not true, the Gitup Git2 has two 2160 recording formats, one is displayed at 3840x2160 16:9, the other is displayed at 2880x2160 4:3 and is recorded using the full 4:3 sensor area.
 
Pytha said:
"All" 4K action cams only record 2880x2160 (cheap sensor, weak CPU .. you
cannot get more for $40 etc.) - up to 3840x2160 is pushed by player or
INTERNALLY by camera.

H8R is a "joke" ... 2880x2160/15fps are doubled to 3140x2160/30fps :(

d8k83txig9u3psa5s.jpg


I don't believe Sony IMX117 with ELE or other cameras ... this sensor makes up to 4096x2160/60fps
Click to expand...
Looking at your screenshot of the Eken H8R data, how can you tell that 3840 x 2160 is interpolated and not native? Same with the frame rate, how can you tell that 30fps is double frame rate rather than native?
 
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Look ANY H8R video - stepwise - then you will see that two successive
frames are SAME! - ---> It's only 15fps, doubled. Sensor is not suited
for 3840x2160 = interpolated pixels.

Some Sony sensors even make only 1920x1080 video .. how do they produce 4K?
In most cases 2880x2160 gives 3840x2160 by stretching 1.333:1 - internal or by player.
 
Pytha said:
Look ANY H8R video - stepwise - then you will see that two successive
frames are SAME! - ---> It's only 15fps, doubled. Sensor is not suited
for 3840x2160 = interpolated pixels.

Some Sony sensors even make only 1920x1080 video .. how do they produce 4K?
In most cases 2880x2160 gives 3840x2160 by stretching 1.333:1 - internal or by player.
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I'm not saying you're wrong. I'm saying that one can't tell by looking at the data that the resolution isn't 3840 x 2160 uninterpolated or that the native frame rate isn't 30fps. It might be true but I can't tell from the data. Nor do I know what sensor or processor is in the camera based on the manufacturer's website - it doesn't say.

I haven't received the Eken camera yet so it's possible this information can be found in a manual included with the camera. But as it stands, unless one works in the industry and knows this type of information for a fact, or has done a teardown of the camera, one can't say for sure that it's wrong. (I don't know how to look at frames individually. If you have an Eken H8R and have done so then of course I'll take your word that the frame rate is doubled. It's just that the available information doesn't say so.)
 
Look EKEN.com - there you will find the blahblah manual. Printed small and useless.
Doubled frames I found with my H8R - but even ALL youtube videos "4K/30fps" show
doubled frames. It's shame!

There are identical cameras (campark) with 10 and 15 fps.

campark ACT75 <--- click
 
TeriTerryTarry said:
Looking at your screenshot of the Eken H8R data, how can you tell that 3840 x 2160 is interpolated and not native?
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Will be more dangerous when a $50 chinese cheap camera will record 3840x2160 30FPS file on its Card in next 1-2 years. Right now, recording and stored as real 2880x2160 and interpolated by the player as 3840x2160 is better than recording as 3840x2160 using a poor CMOS, poor chipset but resized by camera software in some way.

When you will have poor image quality but with 3840x2160 resolution and real 30FPS you cannot accuse anymore the manufacturer for lies.
You will be lied by specs. 4K not means just a resolution and a FPS means a UltraHD quality, much better than actual FullHD, an image obtained from a bigger CMOS with very high standards.

You can record with an old mobile phone a video as VGA and 30FPS. Then you will go to the PC and resize that video to 3840x2160 30FPS. You obtained a 4K video? My answer is Not, but a poor chinese manufacturer desperate to sell, the answer is Yes. You can not go to your best friend and tell him that your Nokia Banana is recording as 4K when your original video was obtained from a 0.8MP CMOS.

enjoy,
Mtz
 
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Today I had to compare SJ8000 3840x2160/24fps (2880x2160) against EKEN H8R 1920x1080/60fps.
SJ8000 video is MUCH BETTER than EKEN video ... haha, perhaps EKENs (fake) video 3840x2160 is
an uppushed 1920x1080 ... who knows? :|
 
Will be interesting too see when some 1080p video from some action camera is looking better than Eken 4K video or any other fake 4K camera.

enjoy,
Mtz
 
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