1

(44 replies, posted in General)

All regards for development to Joan and other contributors! I'm happy and excited to see new Kinovea edition, it looks promising. Wish successful use to whole Kinovea community.

2

(28 replies, posted in General)

It is our pleasure to work with Joan and Kinovea community, Kinovea is such great piece of software, we use it daily and we have best words about it. We stay at disposal for further testing and development. One more time all regards from SDCS Team.

This is true, but see also purpose of cameras in experiment with lenses, they are used for long range, rather infinite view recording, sky or landscape. Weather forecast cameras, panoramic cameras, surveillance...

We have done tons of records with logitechs where recording subject was not more than 10m from camera and everything looks great.

We will try some experiments with different lenses and let people how it works.

All regards to Joan efforts, it takes more than it can be described in few posts, we are just making tests with dual capture and writing test reports, this is not ''one man show''. More progress to come in next weeks.

We use Logitech C920 with Windows 7, there is software Logitech Webcam Software that handle only one camera, it is tricky to handle two cameras, we do plug in - plug out manual operation with two cameras in order to do settings on both. I heard that there is application for Windows 8, Logitech Center where you can do settings of both cameras in the same time, never tried this.

Joan,

That would be perfect! We are waiting for your progress. Please let us know when it is ready. We will do our tests and send you report.

If you handle this issue, is there chance to add option for multiple camera capture (example 3 or 4 cams)?

7

(1 replies, posted in Cameras and hardware)

Hello Oliver,

I know that most of web cams has mjpeg, there are also some handy cams that can do it but you have to check in technical specification of camera.

I found after one year that my JVC GZ-EX215 can do mjpeg over wireless but I did not test it with Kinovea.

We used Windows 7 OS and there is control center for Logitech C920 camera, but it supports only one camera. What we have done: first we connect first camera trough usb port we do setting of camera, take it out, connect second camer in other usb port and we repeat settings of camera, and than we connect back first camera, in this way we managed that both cameras has same resolution and frame rate. There is better control center for Windows 8 where you can handle multiple Logitech cameras in the same time but we did not try it, maybe you can test it.

We saw that older computers can not handle dual capture mode easily, we done some videos and frames was missing, than we tested dual capture with better notebook, we did not have super machine but dual core processor, 4gb or ram was enough to handle dual capture with 600x360@30fps. In last 3 months we done tons of videos in dual mode and we like it very much.

There was one issue, if we try to connect both cameras with own cable it makes frame rate goes down, or there is video blinking, or there are lines and noise on video or missing frames, when we extend them with Hama usb-female to usb-male extension cable picture becomes stable. smile maybe we have usb port issue but with cable extensions it works like dream. Also added one more extension in total of 6m (two cable extension of 3m) and it works fine, no issues at all. All recordings we done with Hame cable extensions.

9

(6 replies, posted in Cameras and hardware)

Joan,

Please let us know progress of redesign of capture pipeline, we have two Logitech 920 HD pro usb 2.0 cameras, if you need any test please let us know, cameras as capable for full hd 1080@30fps

10

(6 replies, posted in Cameras and hardware)

Also you can check following files, done with Logitech c920 camera and same options in dual capture
https://commons.wikimedia.org/wiki/File … ajder.webm
https://commons.wikimedia.org/wiki/File … Rebur.webm
https://commons.wikimedia.org/wiki/File … glava.webm

11

(1 replies, posted in Ideas and feature requests)

Still waiting for linux version...

12

(6 replies, posted in Cameras and hardware)

Hello Cepoman,

Check this post http://www.kinovea.org/en/forum/viewtopic.php?id=736 similar camera Logitech C920, same issue, still we did not solve it, we done tons of videos but have get hi-quality videos, only thing that we can do is to test dual capture mode with powerful computer (tons of ram memory and processor hertz and cores wink ) Please let us know if you manage it somehow

So far for now dual capture with two Logitech C920 cameras works well at resolution 600x300@30 fps, frame rate is stable and quality of picture is good, we tested with prolonged cables total of 7.5m on each camera and no issues at all. We done recordings of various sport movements and all videos can be used for movement analysis. Next task is to solve marker tracking. Also it would be nice if we can get videos at higher resolution we will try with stronger notebook (one we use has dual core processor and 4gb or ram).

Hello Chas,

Thanks for posting here.

Right now stop-action single-frame is not important for us. We are more focused to get routine and skills in practical work with multiple cameras, and than we are have second focus and that is localization of Kinovea in our country followed with education classes and than it comes popularization of open source software and sharing of knowledge. We are more interested to teach coaches, athletes, professors and others how to analyze human movement and that there are cheap tools on the market to do that. In this moment we do not have budget to purchase other expensive cameras, and we like option of dual capturing and fork with two cameras in the same time as well file naming when there is ton of videos you have to do at competition or training.

First job done with two web cameras Logitech C920 HD pro and Kinovea software, recording has been done with dual control bar from 0.8.22 experimental version, we made some 250 video files and the most impressive is that we recorder best javelin throw in Serbia in last 10 or more years, made by Vedran Samac from Sremska Mitrovica (79,22m) and one of the personal best shot put throws done by Asmir Kolasinac (20,14m), Serbian national champion. All files has been done in resolution 600x360@30fps

We also used one JVC Everio camera as support but all recording has been done from camera (no use of Kinovea).

Take a look on our work (video resolution reduced for fast upload):

[video]https://www.youtube.com/watch?v=UJRkah1 … e=youtu.be[/video]


[video]https://www.youtube.com/watch?v=G4DLYUc … e=youtu.be[/video]