496 Reply by joan

(5 replies, posted in Cameras and hardware)

Try version 0.9.3 if possible, there is a new recording mode and more improvements.

When you press the red record button it records the video using the mode set in Preferences > Capture > Recording. This defines if delay is taken into account or not and whether the recording is done on the fly or not.

It decides to compress the video or not based on Preferences > Capture > General. Depending on the speed of the storage medium and the CPU one option might be better than the other. If you have an SSD with room to spare you can try recording without compression.

If the length of the recordings fit in the delay cache you can try the Retroactive recording mode. In this mode it stores the frames in memory until the the recording operation is over and then compress/save all at once, this avoids dropped frames.  You can change the size of this cache in Preferences > Capture > Memory.

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497 Reply by joan

(5 replies, posted in Cameras and hardware)

Hi,
Please add more details:
- Which version of Kinovea?
- What camera settings ? (stream format, image size, framerate)
- Which recording mode are you using?
- Are you saving compressed or not compressed?
- What is the storage medium SSD, HDD, is it the location as Windows system?
- What value do you see for "Load" in the infobar? Does it go over 100%, what about the drop counter?

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498 Reply by joan

(10 replies, posted in Bug reports)

Ouch, these exceptions are happening in very deep and low level parts of the code… What kind of computer is it?
I'll leave the capture running overnight to see if I can reproduce any spurious crash.

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499 Reply by joan

(10 replies, posted in Bug reports)

No it's all the logging there is… What kind of camera is it?

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500 Reply by joan

(1 replies, posted in Cameras and hardware)

Double check the exposure time in the camera configuration dialog, maybe it is so low that everything is dark and you can't see anything. If it's not that it's probably a bandwidth or current bottleneck. Do you get an image in Zoom/Skype or other software using the camera?

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501 Reply by joan

(2 replies, posted in Cameras and hardware)

Hi, I don't think the MER-160 exists in GigE / Ethernet variant, only USB3.

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502 Reply by joan

(2 replies, posted in Bug reports)

Usually when cameras works independently but not simultaneously it's a USB issue. They either want to draw more current than possible or want more bandwidth than available.

It's not that easy to diagnose, sometimes all the ports on a laptop end up in a single USB root hub. There is a tool called USB tree view or that let you see the USB hierarchy and which ports ultimately end up in the same root hub and have to share resources. https://www.uwe-sieber.de/usbtreeview_e.html

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503 Reply by joan

(2 replies, posted in Bug reports)

Hi,
Yes this is the way it currently works in 0.9.3.
The "saving last configuration" you read was probably about the fact that the camera options themselves, like exposure time, framerate, etc. should be restored when you reopen that particular camera.

For the next version there is a concept of "workspace" that will contain the screen arrangement and content. Each instance can have its own workspace and will start up on this arrangement. Maybe later there will be a different or related function to save and restore the state every time but first I will want to get some feedback on that workspace feature.

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504 Reply by joan

(19 replies, posted in Cameras and hardware)

No worries. This particular UI change has confused a lot of people. I'll try to add back a way to select the camera from the configuration dialog when the screen is empty or at least put a message box explaining the new way to open cameras.

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505 Reply by joan

(8 replies, posted in General)

I glanced at it but didn't really find any issue, so now I'm confused by your new formula smile

Did you mean to write COS in the second line? It made more sense for the Y coordinate to be = radius * sin(angle), where "angle" is the total angle, in radians, relatively to the global X-axis and "radius" is the distance to the known point. There might be an issue in the way you compute the P1-P2 line angle relatively to the X-axis?

I made a little drawing:
https://www.kinovea.org/screencaps/relative-coords2.png

I'm assuming you are tracking P1 and P2 and you are looking for P3. And assuming you know about alpha2 (blue) (the P2-P1-P3 angle) that you measure by hand on the object, and you also know d, the distance between P1 and P3, measured on the object.

So what you are doing is, find alpha1, then compute alpha3, compute the P1-P3 vector from trigonometry, and add that vector to P1. Correct?
Your original formula should work: 

P3x = P1x + d * cos(alpha3)
P3y = P1y + d * sin(alpha3)

How do you compute alpha1?

There is another way that doesn't involve angles, if you express P3 in its own little coordinate system where P1-P2 is the horizontal unit vector.

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506 Reply by joan

(2 replies, posted in General)

Fantastic!

By the way I remember you reported an issue with tracking values of tools that also have a constraint, like "angle-to-horizontal", where the value was correct in the video view but not in the Angular kinematics graphs. This should be fixed now in the latest beta.

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507 Reply by joan

(1 replies, posted in Ideas and feature requests)

I agree it's not ideal, a tool-specific toolbar would be nice to have somewhere. You don't have to open the color profile and search for the tool though, if you right click in the video background while the tool is active it will directly bring you to the color profile at the right page.

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508 Reply by joan

(1 replies, posted in General)

You can tell it to stay visible for a number of frames.
Right click > Visibility > Custom fading, and then in "Configure custom fading" change the "Opaque duration (frames)" counter.

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509 Reply by joan

(42 replies, posted in General)

No it hasn't changed. Set the working zone then use either menu "File > Save" or the "Save video" button in the lower right corner of the playback screen and then "Save video with annotations permanently applied" to export a new video.

What is the result you are getting? The output contains the whole video?

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510 Reply by joan

(6 replies, posted in Cameras and hardware)

I don't know about that camera but I'm confident it doesn't stream 1080p@120 fps to the outside, that spec is what goes to the SD card.

You can record with a smartphone, you need to install an "IP camera" application that outputs an MJPEG stream, like "IP Webcam" for Android. This won't get you to 1080p@120 though.

Another option is industrial "machine vision" cameras, like Daheng Imaging, Basler, IDS. These have much better perfs but are more expensive and you have to buy a lens in addition to the camera, but quality-wise they are the best.

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