346 Reply by joan

(9 replies, posted in Bug reports)

"Use motion synchronization mode", this is still experimental. The idea is that instead of synchronizing the videos on a common event by shifting one in relation to the other, this mode uses the length of each video segment and changes the playback speed of the right one, such that both the start and end are in sync (but they are no longer using a comparable time base).

Basically it's a way synchronize a whole segment by scaling the time axis in addition to translating it. This can be helpful if you want to compare form within a larger motion while doing abstraction of the performance speed. For example say we have two long jumpers and we want to compare their form during the aerial phase, but one jump is taking longer than the other.

Regarding cameras that have the same name. In the log there should be a line with the camera identifier. This is normally a unique name, it's the DirectShow name. I think I've heard about this issue with the Kayeton cameras. Can you check in the log if they have the same "moniker"?

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347 Reply by joan

(2 replies, posted in General)

There is not a way to manually input the coordinates from within the software.

The only way would be to create the KVA file with the coordinates in it. This is an XML file, you can create a test file to see how it looks and try to put your data into it or generate one yourself.

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348 Reply by joan

(27 replies, posted in Bug reports)

Thanks for the follow up.
Can you describe the configuration that doesn't work so I can reproduce and fix the issue?
How was the webcam "deactivated"? Is it in Windows settings? Is it something specific to that particular webcam?

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349 Reply by joan

(27 replies, posted in Bug reports)

You don't need to have a camera to use Kinovea, but it will look for connected cameras on start up and prepare a thumbnail for each connected camera in the background. This is an optimization but maybe it's causing more trouble than it's worth.

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350 Reply by joan

(9 replies, posted in Ideas and feature requests)

You're right, I think people that wanted to do this with labels were also essentially tagging the whole frame as a particular event. So being able to create named keyframes on the go as the video plays should fill the same use-case.

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351 Reply by joan

(2 replies, posted in General)

Not for center of mass per se, but since it's mountain bike maybe from the wheels? Measuring rotation per minute and knowing the radius?
Would have to test this on controlled footage first to get some error bars.

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352 Reply by joan

(9 replies, posted in Ideas and feature requests)

There was also a request for automatically creating drawings of a certain type.
I think it should be doable but not sure about the form factor.
Maybe something in two steps: 1. a number of "dynamic commands" added to the shortcut manager, where you can bind the keyboard shortcut you want. 2. in the drawings preferences a place to define the action corresponding to each dynamic command.

It would be simpler if all the actions have a simple format, for example create X and just one argument for the name. But I think people would use this a lot to add labels, so it's important that this can create labels with specific text.

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353 Reply by joan

(27 replies, posted in Bug reports)

@Martin, your problem is different. Based on the log it's possible the newest runtime from IDS is no longer compatible with the SDK I used to make the plugin.

For the problem of the crash with no error message in the log I'm not sure where to start and I don't know how to reproduce the problem to investigate it.

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354 Reply by joan

(1 replies, posted in General)

Hi,
This is not implemented and at the moment it's not on the roadmap.
You can use a dedicated software to capture the screen. OBS is free and open source.

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355 Reply by joan

(3 replies, posted in Bug reports)

Yes that's correct. You should get all the frames, they are just spread out more in time.

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356 Reply by joan

(42 replies, posted in General)

If I recall correctly this is written in the log at some point during recording. Otherwise it is saved in the .KVA file produced along the captured video, but if you opened it, modified the value and saved back it was most probably overwritten. However if you recorded multiple videos the same day one of the KVA file might still have it.

There are two log files and they roll over based on file size so there should be history for a few recording sessions in there.

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357 Reply by joan

(3 replies, posted in Bug reports)

Hi,
This aspect is often confusing because there are many different framerates when recording high speed footage.

Normally it should be automatic and work like that: the camera sends frames at 260 fps, Kinovea records 260 frames per second in the file, and at the end, in the metadata of the video file, writes "30 fps". This is to avoid media players trying to replay at 260 fps (or higher) which they can't do. It's similar to the high speed function on a phone or a camera. That's why high speed footage looks slowed down when replayed.

On the playback side there are two things to consider, the playback speed and the times displayed. The typical way to do things is to let the footage be slowed down but "fix" the time display so you can still make time measurements or compute the speed of an object. This is controlled under Video > Configure video timing. If you recorded the video with Kinovea it should be set automatically.

If you really want to have the final video marked as 260 fps (it will probably not playback at that speed), you can change the behavior under Options > Preferences > Recording > High speed cameras. Check this paragraph of the help: https://www.kinovea.org/help/en/userint … ed-cameras

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358 Reply by joan

(3 replies, posted in Bug reports)

Right click the video image itself, without adding any marker. In the "background" of the video frame so to speak. There is a separate context menu when you aren't on any drawing. It's in this menu. This means you can directly right click the area of the video you want to track, don't add a marker.

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359 Reply by joan

(2 replies, posted in Bug reports)

Is it an IDS camera? I remember there was a similar slow down with these cameras.
Could you show the beginning of the log when this slowdown happens?

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360 Reply by joan

(2 replies, posted in Ideas and feature requests)

Yes, that's a good change. Please send a pull request.

For the XML files it depends on the tools, some of them are explicitly described and others are just referencing an internal class and use the XML only to describe styling options. What kind of options do you want to add?

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