Report on the Yi 4K+ - Page 3 at DVinfo.net

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Micro / POV Camera Systems
Covering the GoPro HERO and other small Point-Of-View video cameras.


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Old September 12th, 2017, 11:41 AM   #31
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Re: Report on the Yi 4K+

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Originally Posted by Bruce Dempsey View Post
fantastic watching on a 4k 27" hp envy monitor and it's quite lovely.
Any focusing or is the depth of field everything out there?
Have you shot any stage stuff with it?
The wide-angle lens ensures a big DOF. See the close-ups of the telescope, with the distant vista still in focus.

No stage stuff yet - the camera does need a lot of light.
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Old September 12th, 2017, 03:16 PM   #32
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Re: Report on the Yi 4K+

Have you defished the footage or is it unaltered?
Most cameras do well in daylight so it will be interesting to see some spotlit stuff
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Old September 12th, 2017, 07:48 PM   #33
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Re: Report on the Yi 4K+

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Have you defished the footage or is it unaltered?
Most cameras do well in daylight so it will be interesting to see some spotlit stuff
No alteration in post, except some gamma adjustments.

There is a spot meter mode, which will be very useful for spotlit scenes!
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Old September 13th, 2017, 09:37 AM   #34
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Joggers in slow motion in 4K

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Old September 17th, 2017, 08:05 PM   #35
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Re: Report on the Yi 4K+


24p, 2:39 aspect ratio, shot flat color and color graded.
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Old September 18th, 2017, 06:45 AM   #36
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Re: Report on the Yi 4K+

I'm wondering if the Yi 4K +1 will employ the DSCRX0 1" sensor?
Have you any indoor footage to show? please and thank you :)
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Old September 18th, 2017, 07:46 PM   #37
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Re: Report on the Yi 4K+

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I'm wondering if the Yi 4K +1 will employ the DSCRX0 1" sensor?
Have you any indoor footage to show? please and thank you :)
Here is low-light 4K test footage - shot at 4K24P ISO 800. It was very dark - one light bulb in the ceiling. This was shot to imitate what the scene looked like, not to push to make it brighter than it looked to the naked eye.

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Old September 19th, 2017, 12:34 AM   #38
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Re: Report on the Yi 4K+

Is there any control over the audio level or is it AGC like the GoPros?
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Old September 19th, 2017, 06:19 AM   #39
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Re: Report on the Yi 4K+

thanks, that was illuminating :)
not to shabby at all and quite natural. I could get 2 of these for the price or a RX0
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Old September 19th, 2017, 07:48 AM   #40
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Re: Report on the Yi 4K+

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Is there any control over the audio level or is it AGC like the GoPros?
I hate AGC, squashing dynamics and pushing up noise when there are low level sounds. However, in recent years almost all cameras use a limiter rather than aggressive AGC, and it is much better.

The Yi 4K+ allows setting two levels for audio, low and high. High is the "natural" setting. The dynamic range is large, with no pumping. 'Low' is for rock concerts, where the levels are very loud and constant.

At 2:34 in this video, a train passes by. You can hear the incredible dynamic range - from soft to very loud to soft again. That can only happen without aggressive AGC. I can see it on the audio waveform.


If you listen to some of the above posted videos with ambient sound, you will also hear large differences in amplitude depending on closeness to subject and subject levels.
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Old September 19th, 2017, 09:49 AM   #41
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Re: Report on the Yi 4K+

Thanks Mark.

I had to ask, we went for a ride on a road "train", a diesel powered mock steam locomotive with a few seated cars behind. I only had the GoPro (Hero 4 Silver) handy, so I used it with the stereo Igomic, which gives better quality audio at a lower level than the cheapies, but as we passed buildings the sound level was pumping like mad. Editing is going to be fun!

I am impressed with both the video and audio from your Yi 4K+, so now I need to decide whether to replace the Hero or do without as I did before.
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