Recent Posts

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21
Chronos User Discussion / Re: Post Chronos 2.1 clips here!
« Last post by willemwopa on July 17, 2021, 11:50:57 AM »
2 more movies made with the chronos 2.1
It is a very nice camara to work with
1- https://www.youtube.com/watch?v=AmY8R5vQiA0
2-https://www.youtube.com/watch?v=A6TqH9rQEAI
3-https://www.youtube.com/watch?v=laN2YkBBrHU&t=16s
4-https://www.youtube.com/watch?v=YsQV2hR3Syk

I have some more on my channel
22
Software Dev / V0.6.0 1.4 to 2.1 comparison
« Last post by Bian on July 17, 2021, 02:43:03 AM »
Little comparison between 1.4 and 2.1

Software V0.6.0
Pictures stored as .dng on a sunny day.

Whyle the 1.4 delivers  good results – aperture between 2.8 and 4.0, video level 75 to 80 IRE,
the 2.1 quality is only at full HD well.
 
The main problem is the poor video level. Even the picture is over exposure completely, the video level will be not more than half (50 IRE) at 800x450 and below.
The „Zebra“ function doesnt work below 1280x720 because the maximal video level ist o low.....
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Chronos User Discussion / Re: Post Chronos 2.1 clips here!
« Last post by chrissie_c on July 16, 2021, 07:28:59 AM »
Hey guys! Look at my new slow-mo chemical reactions: https://www.youtube.com/watch?v=J2dECQAYXwE
(See video description for slow-mo timing)  :)

I love these so much!
24
Chronos User Discussion / Time tagging
« Last post by kaklik on July 15, 2021, 02:58:31 PM »
What is the best way to capture a video, which should be possible to time-align to absolute time (e. g. UTC.)? The required precision of time alignment should be comparable to the exposure time.
I noticed that there is possible to install the ntpd to the camera OS, which is a good base for timing. But I do not know how to mark the system time precisely to the video.

Also, I noticed that there is a time in the text overlay, It seems it always shows a time of around 17xxx seconds. But It is unclear for me which time is a zero?
25
Software Dev / Re: Lightning capture - time discontinuity
« Last post by kaklik on July 15, 2021, 02:25:12 PM »
I have modified the trigger script in a way, that minimizes a possible disturbance of the camera video system by repeated requests. The new script version checks status before action.
It seems that time discontinuities are gone.

But the relevant trouble is the question, how to immediately restart the recording without periodic checking of file saving state?  In the case of external trigger initiated recording. There is an "Auto record" option that could be set from the camera menu. It ensures that recording is started immediately after the completion of the saving procedure.  Unfortunately, this option seems to have no effect in the case of file saving started from HTTP API.
26
Chronos User Discussion / Re: How does the Color Matrix work?
« Last post by Nikon1 on July 15, 2021, 11:24:14 AM »
Do you use the Internal Monitor or an External one?
 Just from my personal experience the internal Monitor is mostly "good enough" to set your frame up and pull focus when using Digital Zoom Feature.
 But i found that i did really struggle with proper Exposure until i was able to have a Histogram on my External Monitor at all times.
 Exposure is just somewhat hard to judge on the Built-In Screen if you are going for the Best footage the Camera can Capture, also Color looks off on the Internal Screen. Not by a ton, but just enough that someone who doesn't know a lot about color would even notice. And i absolutely trust my SmallHD 502 Bright over the Built-in Screen regards Colors and such.
 .
 So if you rely on the Internal Screen only For White Balance or color settings you maybe have a hard time, indeed.  Now i also Usually only shoot in Daylight /with Daylight LEDs with good color or Tungsten Lamps, and for that the Presets usually work fine for me. Have to say, that i also try to Save as DNG if Quality of the Footage is of concern, so even if i don't hit it perfectly or just dislike how it looks, i can just go and adjust it in post.
 .
 If you save in H.264 However, you have to be a bit more careful, if i have to do that, i would usually use the Custom Color Matrix and set it to:
 .
 1    0     0
 0    1     0
 0    0     1
 .
 This will give you a very Flat, desaturated color profile and usually allow for a wider range of options in Grading the Footage Later. Make sure to get the White Balance right however, as you cant really change that easily later if you are way off when working in H.264.  .
 
 
27
Chronos User Discussion / Re: How does the Color Matrix work?
« Last post by lwaters on July 15, 2021, 11:01:42 AM »
I would also love to know more information on the Custom Color Matrix...I am really struggling to get a pure white balance and would love to be able to understand anything about it.
28
Chronos User Discussion / Re: Post Chronos 2.1 clips here!
« Last post by ChemicalForce on July 15, 2021, 10:40:16 AM »
Hey guys! Look at my new slow-mo chemical reactions: https://www.youtube.com/watch?v=J2dECQAYXwE
(See video description for slow-mo timing)  :)
29
Chronos User Discussion / Re: Chronos 1.4 Footage Thread
« Last post by Nikon1 on July 15, 2021, 05:51:00 AM »
Never thought 40.000 FPS are still to slow to capture every detail
Depends on what you try to shoot with the Camera, i guess, but for Gun Stuff (also glass and some other things) you can end up needing plenty of fps to capture fine Details.
 .
 For everyone who hasn't seen that, here is a Video shot at 1 Million FPS:
 https://www.youtube.com/watch?v=QfDoQwIAaXg
30
Chronos User Discussion / Re: Chronos 1.4 Footage Thread
« Last post by Buddlich on July 15, 2021, 02:19:45 AM »
I captured some air guns diabolos impacting  steel plates.
https://youtu.be/ZxjJ9Qd-2EA

Never thought 40.000 FPS are still to slow to capture every detail


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