The requirement here if I understood correctly is to have a single instance of Kinovea with a single screen inside, and to switch between capture and playback, to minimize resources consumption.
407 2021-02-20 14:53:23
Re: Adding Hotkeys (11 replies, posted in General)
Yeah, at the moment I don't have a good idea on how we could do this nicely.
One idea maybe would be to have a command that starts a playback screen on whatever is the most recent entry in the capture history. Then you could close the capture screen and use this command. To reload the camera afterwards would require the workspace function to work at any point in the life cycle of the application instead of just the startup.
408 2021-02-19 08:57:13
Re: Adding Hotkeys (11 replies, posted in General)
No, it is not expandable unless the source code is modified. The underlying mechanism is "commands" and the shortcuts are bound to commands. The preferences.xml file defines the mapping between commands and shortcuts. In order to add a new shortcut there first need to be a existing command. A command does not necessarily have a corresponding shortcut bound to it.
What is the action you wanted to do via a keyboard shortcut?
409 2021-02-11 00:49:17
Re: Line - Calibration - Flips x and y coordinates v.0.9.3 (2 replies, posted in Bug reports)
Yes. This should be fixed in the next version.
Allow me to clarify what is happening. In previous versions the direction of the calibration line was completely ignored, and the coordinate system was always aligned with the image axes. This was a bit restrictive, if the camera was rotated a bit you couldn't really get vertical or horizontal coordinates in world space, they were always aligned with the rotated camera. We had to use the plane calibration to work around this limitation.
In 0.9.3 the line direction is used as the horizontal axis. This way we can have a rotated camera and still get coherent coordinates. But as you noted this is not always desirable.
In the next version when you define the scale of the line you also tell if this line is along the horizontal axis, the vertical axis, or if its direction should be ignored and the coordinate system should use the image axes.
410 2021-02-09 23:00:31
Re: Balser Dart Camera (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.
411 2021-02-09 13:50:57
Re: Balser Dart Camera (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?
412 2021-01-19 21:44:39
Re: Randomly closing/crashing beta v0.93 (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.
413 2021-01-08 23:20:17
Re: Randomly closing/crashing beta v0.93 (10 replies, posted in Bug reports)
No it's all the logging there is… What kind of camera is it?
414 2021-01-03 17:07:56
Re: ov2710 (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?
415 2021-01-03 17:02:13
Re: 3 Daheng mer 160 over Network Switch (2 replies, posted in Cameras and hardware)
Hi, I don't think the MER-160 exists in GigE / Ethernet variant, only USB3.
416 2020-12-30 11:33:10
Re: newbie question - cant get OV 4869 cameras to work simultaneously (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
417 2020-12-02 12:58:37
Re: Kinovea not saving configuration? (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.
418 2020-11-14 10:49:04
Re: Kayeton "high speed" USB camera based on OV4689 (17 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.
419 2020-11-03 11:34:03
Re: Tracking the relative angle of an object (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 
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:
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.
420 2020-10-16 15:26:20
Re: Configure bikefit tool (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.