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Messages - JamesB

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Software Dev / Re: Chronos V0.3.1 Beta
« on: September 27, 2018, 07:03:31 PM »
I can see the thumbnail previews but both Photoshop and After Effects give import errors on Windows.

Really hope the files are not useless because I just spent 2hrs shooting them  :-\

32
Good that a fix was found, this also applies for any bright lit metallic object with specular highlights!

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Software Dev / Re: Software Roadmap - 0.3.1, 0.4.x, etc.
« on: August 13, 2018, 05:09:01 PM »
Quote

… That is an excellent suggestion. I've added it to the mockup for the new UI, so it should make it into 0.4.0.


Thank you DDR, that is a big deal in my case!

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Did you happen to do any comparisons before and after the patch?
No, but shot a lot with the regular h.264. I had no available time to apply the update at separate locations.  There is a big difference in quality for the demosaic now.  Before it was dancing moire and aliasing everywhere fine detail was observed, now it is about 70% of what the RAW offers.  I will still shoot RAW for maximum quality where I need it but for just playing around the h.264 would do well. 

WHen direct DNG saving is ready it will also save the conversion step which is kind of a pain.   Maybe the DNG could be compressed to save space also.  Right now a typical session in RAW with the camera is about 30GB worth of data. Where it could really be 3GB if it was JPG like.    I wouldn't be opposed to a JPG saving feature either as long as the conversion is adequate.

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Here are my image and video tests on the new Demosaic Patch.  Highly recommended install.  There are some slim black borders on the top and bottom of h.264 not on RAW which are being fixed by the team already. Other than that the patch is solid.  Should be ready for wide release soon.  Thanks, Krontech Software team! 

http://www.hispeedcams.com/chronos-1-4-new-firmware-improves-h-264-image-quality/

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Software Dev / Re: Software Roadmap - 0.3.1, 0.4.x, etc.
« on: August 01, 2018, 01:37:57 PM »
That is an excellent run-down of upcoming releases.  The De-mosaic improvement in H.264 and HDMI out are things that will make the camera workflow improve greatly.   

One feature I would love to see implemented is having shutter speed (EXPOSURE) in 1/60 1/100 1/500 1/1000 1/XXX  instead of it being in Micro Seconds (us) as an option.  For camera operators, it would be a big deal to be able to match shutter speeds with other cameras without doing time-consuming conversions.    :-X 

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Chronos User Discussion / Re: Trigger can just stop recording
« on: July 13, 2018, 07:34:12 PM »
Most if not all Slow Motion cameras work this way. The Auto Record checkbox is the ideal solution as after saving it will always start recording which mimics how Phantom and edgertronic cameras work.  It would be ideal to have a red dot on the interface blinking that showed it was recording as it is very hard to tell unless you look at the LEDs.  (O REC)   Something for the UI improvements.

38
Software Dev / Re: Software V0.3 RC1
« on: May 08, 2018, 09:02:29 PM »
Got the same start frame corruption and occasional frames garbled.  I reverted back to the previous release as I need all frames to be free of artifacts for a shoot I'm working on.  Hopefully, this bug can be fixed soon so I can continue testing.

39
Great news, also would love to get the compressed RAW converter option soon as I have a list of clips that are just sitting there. It also makes for faster storage in the field, regular RAW just eats up cards for lunch. 

I am very happy with the RAW quality and after using it, H.264, as it is right now, is not worth it even for the speed.  Also with proper and often black calibration, most banding is taken care of.   

A 10-bit version of H.265 or a 4:2:2 H.264 variant with better demosaic algo would make this amazing for speed and quality. 

It would also be so cool if we could have a daylight balance preset for the WB. Maybe be able to save a previous WB in a file as balancing every time is an extra step.  Most of us either shoot in our studio or outside needing only 2 WB presets.  For a later build of course.   Great job so far David!

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Chronos User Discussion / Re: Chronos 1.4 RAW conversion tool - pyraw2dng
« on: February 26, 2018, 01:38:59 PM »
Thanks, David, it is really encouraging to see the Chronos starting to mature into a dependable professional tool.   Excited by the upcoming possibilities from you and the development team.  :D

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Chronos User Discussion / Re: Chronos 1.4 RAW conversion tool - pyraw2dng
« on: February 25, 2018, 06:30:49 PM »
Well, I tested the heck out of the RAW recording this weekend and I am very impressed with the quality gains. So much so that H.264 seems to be an easy way to destroy your image information.  I believe there should be a way of improving the h.264 output to offer better de-bayering even at the cost of encoding speed.  If DSLRs and Mirrorless cameras can offer h.264 free of most Bayer artifacts the Chronos should be able to do so as well. You will still have less dynamic range and much less color information but at least the color border artifacts should be gone.

I ran into problems with file size as well so the 4GB limit warning was good but it came up even when the file to be saved was just 1.8GB So there is no way of telling.  Your best bet is to have ample card speed and do attempts.   My average RAW file size was 1.67GB by just saving a small part of the action which is always trying to capture what is best.  I had to fill 2 32GB cards in my tests.  Sadly I read that the 12 bit compact RAW is not yet supported but will be so I'll have to wait for that to materialize to see the output.  I also recorded an h.264 version of most clips so I could see the gains in quality.

Much to my surprise H.264 in camera is a horrible conversion compared to the RAW data debayer in Camera RAW, much more so than I expected based on the Krontech frames that were shared.   Noise is still a problem for the RAW files but the extra information and ability to reduce color and luminance noise in Camera RAW before developing is very nice.  The Amount of detail preserved is night and day. Dynamic range is also fantastic by comparison, no contest... the ability to white balance after the fact can also not be understated.  The DNG Converter does a great job with no quality degradation well-done team!

Things that can improve: 

1) Ability to save H.264 and RAW at the same time so you can leave the camera unattended as it takes sometimes 10+min to save a RAW file. Always good to have the H.264 just in case.

2) Ability to eject the SD Card from the save clip dialogue as I ran out of space before saving one time, it would be nice to be able to swap from the saving dialogue box without corruption possibility if force ejected.

3) Camera locked up when card filled and had to do a hard reset. There was a dialogue that said something about card space and I said ok and camera locked up.  Abort button did not respond.

4) When shooting in 720p or lower resolution it would be great to have the button / scrollbar interface on the bottom to amplify the screen real estate and see a larger preview. Only full sensor size seems to require interface to the right. A simple orientation switch would be great.

5) Of course DNG direct from camera which is coming but also a chance to take a second look at H.264 and try to improve the output, the encoder is not doing a proper job of preserving detail and could really be a near RAW detail image without all of these artifacts on edges jumping out.  Most cameras from big manufacturers can do extremely clean H.264 requiring RAW only in specialized situations.  Even if the speed on saving is sacrificed H.264 high-quality encoding should be on the timeline for a software update.  Fingers Crossed X

I am including a frame from RAW and H.264 from one of the videos side by side. Look at the detail and water patterns for artifacts on the H.264, it is night and day difference.  Chronos 1.4 comes alive with RAW.  ;)


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Chronos User Discussion / Re: Chronos 1.4 RAW conversion tool - pyraw2dng
« on: February 20, 2018, 03:38:28 PM »
Wonder if it would be possible to save both RAW data and H.264 of the same clip automatically in a future firmware. Without having to change settings and save each one separately. That way it will be like RAW + JPG on still cameras.   The detail improvement with RAW is like getting a new camera.   Will test in the next few days.   ;D

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Software Dev / Re: Horizontal banding
« on: February 08, 2018, 07:56:10 PM »
I tried to replicate the problem but after black calibration, it went away every time on my unit. Glad I checked this post as I was wrestling with the same issue.  If you accidentally change the shutter even a little with the scroll bar it may come back.  I also found that if you do two black calibrations a few minutes apart the banding goes much lower.    :)

44
Software Dev / Re: Software V0.3 Beta
« on: December 15, 2017, 01:19:17 PM »
Will try it out this weekend, that is some serious feature / bug update.  Can't wait to see the increased save speed and more importantly the drop frame fix which could occur from time to time "this is probably the most important fix"  Will report issues/findings! 

Thanks, Krontech Team!      ;D

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Chronos User Discussion / Re: Shooting Actionsports with the chronos 1.4
« on: October 18, 2017, 12:40:38 PM »
Excellent footage, I see an absence of dark pixels in your video.  Did you get a second batch camera?  Everything I shoot is littered with dark pixels in the image on shadow areas.  Wondering if the batch has anything to do with it. 

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