This is a tutorial on how to use Tracker to track and analyze the motion of an object in a video. Tracker is a free video analysis and modeling tool from Open Source Physics.
Dear Doug Brown you have written a very powerful programm. Thank you very much! I have been using this programm for almost 7 years now. So many laws of physics can be investigated with very little spending for experimental setup. Great work!
Thank you so much for this great piece of software and tutorial - my daughter is doing her homework right now using your software for acceleration measurements of a dynamic friction test!
Doug Brown, thank you so much for this intuitive software! Had to develop a video analysis and plot of a sine wave fin motion and I was recommended Kinovea. Unfortunately it doesn't work with MacOS or in Parallels. On the other hand, your software easily installed and worked first try. After reviewing your video and documentation I had the entire project completed within a few hours and exported to a sharable Excel sheet with the data export option. Again, thank you for this open source, free option!
Great video! This past year, I've been having my physics students record their own videos (using a GoPro Hero 3 black-240fps) and analyze their videos for their physics labs. Last year, I had my high school physics students use Tracker to analyze a movie/tv clip to see if the physics was realistic. Thank you for making a great and user-friendly product!
I wonder how to achieve the best recording for Tracker, I mean a video with no perspective, just like the one shown in the tutorial. Anybody has an idea?
Hello Mr Brown, Is it possible to measure the distance of the ball's trajectory? I am trying to do some measure of coral larvae natation with this software. Thanks
+Douglas Abrantes One way to do this would be to plot the speed (velocity magnitude "v", not vx or vy) vs time, then double-click the plot to open the data in Data Tool. In Data Tool click the Measure button and check the Area box. The area under the speed-time graph is distance. The only disadvantage of this method is that you only get the distance from the second to the next-to-last position (since speed cannot be measured at the first and last point).
Hello Douglas. Thank you so much for this amazing piece of work. It is really simple and easy to use tool. In my application, i need to track two Point masses which are moving in opposite direction with different velocity towards each other along a straight line. Is there a way where we can extend the functionality of this program to track the motion of the two object moving towards each other.
what is the optimal resolution to record videos for tracking? from eyeballing it I have been getting the best quality using 1080p and 60fps. I am using a GoPro 5 Black
There's no optimal resolution. If you have good contrast, focus, small distinguishable details and other best practices (eg bright illumination for fast shutter speeds, etc) when shooting the video then higher video resolutions should give smaller uncertainties when marking either manually or automatically. However, larger file sizes and pixel dimensions definitely slow Tracker down!
Hi Douglas, Great video and thanks for making it. I'm using it for a modelling project i have to do (mechanical engineering). I just imported a video which was recorded on an iphone at 60 fps. Although the frame rate says 59.8f/s in the clip settings the video seems to be running in slow motion. Is this normal? Will it influence my time scale?
From my experience using the software, The program uses a "read-only" system, and only loads the frame as it is displayed. This can cause it to look like it is running in slow motion, but if the frame rate is correct, the plots, graphs and tables should all keep time in the correct scale, assuming 59.8 is very close to the actual frame rate of the video. Hope this helps.
Hello Douglas. Great video. I have a problem when using the perspective tool. Its a rocording of a bowling field at foot height and therefor there is a lot of perspective, when comparing the bottom of the bowling alley to the start. Is there too much perspective to use the tool?
Thanks for making this video! It was very helpful. For my experiment I need to deduce the angular velocity of a spinning skater. I was wondering is it possible to do it with using this software? If so how?
If you have a view from above it's easy because you can track an arm or something else that rotates. If not, then your best bet is to simply measure the mean time per rotation and determine angular velocity from that period.
I suggest you ask this question on the Tracker forum at www.compadre.org/osp/bulletinboard/ForumDetails.cfm?FID=57 You'll need to create an account, but it is free and easy. You should also put more detail into your question. See www.compadre.org/osp/items/detail.cfm?ID=16061 for reporting guidelines.
Estou tendo problema na utilização do tracker. Gostaria de saber se alguém já utilizou gravando com celular. A qualidade dos vídeos não estão ficando boas quando passo para o software. Mesmo gravando em full Hd.
Probably. You might have to cut your video into smaller pieces, analyze separately and combine the data. If you have a problem loading your video try converting it to a different format like FLV.
Thanks a lot. I am physiotherapist interested in researching biomechanic of falls. Now i will be able to analyze simple variables form smartphone-made movies! This soft is exactly what I need. Explanation was perfect, dont listen to others, you sound like experienced mentor
Thanks for this great software. Really appreciate it. If this works for several particles/masses and to take the average of them, this can even be used in research purposes too. Please consider it for this free software
You can use any units you want since they are not shown, it just depends on how you calibrate. If you calibrate in mm, then the units are mm. BTW units will be included in the upcoming version 5.0.
Hi, I’m new in using Tracker and wanted to ask how could I use it to estimate the speed of an object in a GIF? For reference, I made a GIF using GIPHY and tried to upload it on Tracker by dragging it directly on the blank page - but I couldn’t make it work, and I’m now stuck. Thanks in advance for the help.
If your gif won’t open in Tracker then there’s probably something wrong with it. Does it play automatically in a browser? Once it’s open you’ll need to set the frame rate in the clip settings and calibrate the scale.
Hi,I am trying to simulate the sloshing phenomena. i have got the video file of the sloshing. Now I want to get the plot of amplitude of free surface variation with time. So in tracker which tracker option should I select??
Use a point mass to track the surface at a single horizontal position. If you use the autotracker, rotate the axes so the x-axis points up and check the "x-axis only" box in the autotracker dialog.
@@trackervideotool thanks for the reply. I tried doing this.But I am not getting desired results, i.e I am getting pointed graph,not a smooth curve, I should get repeated sinusoidal variation with beats. Any idea how to do it?
@@sajidmomin7759 it’s impossible to know what the issue is without seeing the video. Have you looked carefully at the marked points to see if they are reasonable? Have you tried marking the points by hand?
When you save changes it saves a file with extension .trk. The first time you do this you must name the file. After that it saves changes to the same filename. You should be able to search for that file and open it in Tracker.
I have a high definition video on ".mov" here on my computer... But when i try to open it on the program it says: "the video can not be opened". What should I do?
I don't know if its too late but you have to install the full program and not just the .Jar file www.cabrillo.edu/~dbrown/tracker/ (The Installer) you might also need a program called Xuggle which you can find here www.compadre.org/osp/items/detail.cfm?ID=11606....I had the same issue and this fixed me!
Hello Mr. Brown, I would like to change the coordinate system as a function of time. I have a video where the camera is not being held stationary, and I'd like to have the axes track to lines on the background of the video automatically. Is this possible with this software? I have so far been unable to find how to do this.
+Daniel Walsh Easy--just uncheck the "Fixed Origin" box in the Coordinate System menu, display and select the axes, then step through the video and shift-click to mark the origin manually in each frame. If you want to do it automatically use the autotracker. For more info, see Tracker Help or look at the Tracker Autotracker Tutorial at ua-cam.com/video/Dn0Zz7rtkZw/v-deo.html. BTW if it's a hand-held camera, you may have a varying tilt also. In this case you may want to use Calibration Points to set both the origins and angles.
+Douglas Brown Yes, I need to track both translation and rotation of the axes. I figured out how to autotrack a point mass in the software, but after a couple of hours I couldn't figure out how to autotrack the origin and angle of the axes. What am I missing?
More specifically, the issue is that when using the two calibration points, I can set one of them, and it autotracks just fine, but then when I go to set the other one, tracker "forgets" the tracking for the first calibration point. Why is this happening?
+Douglas Brown Great, I'm happy to have helped discover an issue. I ended up using the method whereby the origin and x axis autotrack, and this worked great. I was using the Mac OS version, by the way.
Douglas I downloaded video tracking from your link I have applied for a work at home with Assurance they send me an email to practice a window when I click on the link will not open the screen
Thanks a lot for this vedio. There is problem faced me when I import .mp4 vedio, this message appears "File cannot be loaded: E:/tracker program/ track.mp4"
If you have a high frame rate video (slow-mo) you should set the frame rate in the Clip Settings. Not sure what you mean by object not being detected. If you can see it in the video then you can track it.
Hi Mr. Brown, thanks so much for the video. I've been having some problems with Tracker, though, and I was wondering if you knew anything about how to solve it. I can get an x-t graph from clicking manually, but I can't get a vx-t or any other kind of graph from it. When I look at the data table, it doesn't record any of those values. The only time it records those is when I enable auto tracking. Any idea what's going on here? Thanks!
Check to see if you have turned off auto-refreshing. Click on the right-most button on the toolbar and make sure the Auto-refresh box is checked. Choose Refresh to immediately refresh plots and tables. Does this do the job?
You have to mark it by shift-clicking where you want the ends of the stick to be (see instructions on the toolbar). You can adjust after. You can change the preference to make the stick draw itself if you prefer.
iPhone 11 by default uses a new High Efficiency HEIF/HEVC codec that is not supported by Tracker. You can either change the video format in your iPhone (Settings|Camera|Formats) or convert the videos to a different format (eg FLV or MP4 with H.264) with a separate video converter application.
@@trackervideotool I tried rotating a potrait video into a landscape format, but the canvas remains potrait. With this issue i was unable to track some parts of the video that went outside the potrait white canvas. How do I fix this problem?
@@carlt9003 Hi Carl, that is a bug which will be fixed in the next release very shortly. In the meantime you should be able to enlarge the background mat with the Edit|Mat Size menu.
Check Help|Diagnostics|About Xuggle. If Xuggle is working right then it's probably a codec issue and you'll have to convert your video to a different format. There are free video converters that work fine. FLV is a good format for Xuggle.
You can copy an image of the main view, any other open view, or the entire frame to the clipboard using Edit|Copy Image. Or Choose File|Export|Thumbnail Image to save an image file of the main view or entire frame. The "thumbnail" can be full size--pick a size from the dropdown. Is this what you had in mind?
Do you mean in the DataTool? Choose Help in DataTool and look at #6. Fitting mathematical models to data. Scroll down to the section "Defining custom fit functions".
@@trackervideotool Sorry Sir, please accept my apologies for my previous misformed sentence. Is it possible to have an url / link to download your software "tracker" in order to test it? Thank you for your help Sir.
@@trackervideotool Thank you very much Mr. Douglas Brown for the link! I wasn't notified by youtube that you added a response and I have no idea why ... again thanks for sharing with us Tracker. I'am a bit early but let me wish you a happy new year 2022 Mr. Douglas !
Dear Doug Brown
you have written a very powerful programm. Thank you very much! I have been using this programm for almost 7 years now. So many laws of physics can be investigated with very little spending for experimental setup.
Great work!
Thank you so much for this great piece of software and tutorial - my daughter is doing her homework right now using your software for acceleration measurements of a dynamic friction test!
Brilliant free software - great, clear description of how to do the basics in around 5 minutes.
How do you do it
the vid is like 15 mins but it is a great vid to learn how to use tracker
Excellent program!! Thank you for such an amazingly simple yet powerful tool.
Just wanted to say thank you for this amazing free software! -A physics student
Short, concise tutorial. Thank you good sir. 👍
I need to learn how to use this program for my classes at my university, this was very helpful
very nice, will be downloading and using this some time in the future. I can see a good use for it
Wonderful tutorial, thank you!
Doug Brown, thank you so much for this intuitive software! Had to develop a video analysis and plot of a sine wave fin motion and I was recommended Kinovea. Unfortunately it doesn't work with MacOS or in Parallels. On the other hand, your software easily installed and worked first try. After reviewing your video and documentation I had the entire project completed within a few hours and exported to a sharable Excel sheet with the data export option. Again, thank you for this open source, free option!
Simply amazing piece of software!
Highly appreciated explanation, Thank you.
Great video! This past year, I've been having my physics students record their own videos (using a GoPro Hero 3 black-240fps) and analyze their videos for their physics labs. Last year, I had my high school physics students use Tracker to analyze a movie/tv clip to see if the physics was realistic. Thank you for making a great and user-friendly product!
EVEN HEGGESTAD SOGNDAL KVÅLE
Awesome! Very well done!
Thank you very much! Very good program. Good tutorial
Great simple software, well done !
You saved my day! Thankyou
great vid, Doug!
Helpful video. Thanks, buddy!
+Solomon Blinchevsky especially since I need it for physics
That's incredibly cool, and I needed to see this to help a physics student today!
Thank you for this helpful video!
Good job Doug!
Can you use this for compositing? Like, say, putting something in a video, and having it move with the camera's movements?
That was really helpful, thanks man!
great video, thanks
Amazingly written program.
Very helpful, thank you!
Thanks Doug Brown, I appreciate you.
great work
Súper clear!!
This is amazing! Thank you!!!
thank you for your software, it's brilliant
nice vid. thanks a lot
Great software! thanks
Awesome software!
thank you so much!
Thanks for tutorial
I wonder how to achieve the best recording for Tracker, I mean a video with no perspective, just like the one shown in the tutorial.
Anybody has an idea?
Hello Mr Brown,
Is it possible to measure the distance of the ball's trajectory? I am trying to do some measure of coral larvae natation with this software.
Thanks
+Douglas Abrantes One way to do this would be to plot the speed (velocity magnitude
"v", not vx or vy) vs time, then double-click the plot to open the
data in Data Tool. In Data Tool click the Measure button and check
the Area box. The area under the speed-time graph is distance. The
only disadvantage of this method is that you only get the distance
from the second to the next-to-last position (since speed cannot be
measured at the first and last point).
Thank you!
Hello Douglas. Thank you so much for this amazing piece of work. It is really simple and easy to use tool. In my application, i need to track two Point masses which are moving in opposite direction with different velocity towards each other along a straight line. Is there a way where we can extend the functionality of this program to track the motion of the two object moving towards each other.
Sure, just track one at a time.
what is the optimal resolution to record videos for tracking? from eyeballing it I have been getting the best quality using 1080p and 60fps. I am using a GoPro 5 Black
There's no optimal resolution. If you have good contrast, focus, small distinguishable details and other best practices (eg bright illumination for fast shutter speeds, etc) when shooting the video then higher video resolutions should give smaller uncertainties when marking either manually or automatically. However, larger file sizes and pixel dimensions definitely slow Tracker down!
Hi Douglas, Great video and thanks for making it. I'm using it for a modelling project i have to do (mechanical engineering). I just imported a video which was recorded on an iphone at 60 fps. Although the frame rate says 59.8f/s in the clip settings the video seems to be running in slow motion. Is this normal? Will it influence my time scale?
From my experience using the software, The program uses a "read-only" system, and only loads the frame as it is displayed. This can cause it to look like it is running in slow motion, but if the frame rate is correct, the plots, graphs and tables should all keep time in the correct scale, assuming 59.8 is very close to the actual frame rate of the video.
Hope this helps.
For 14:41, is it better if the value of the parameter is smaller? Thank you so much
Hello Douglas. Great video.
I have a problem when using the perspective tool. Its a rocording of a bowling field at foot height and therefor there is a lot of perspective, when comparing the bottom of the bowling alley to the start. Is there too much perspective to use the tool?
That sounds like an extreme perspective correction, so it is not likely to give you very accurate results. But you might as well give it a shot!
I would like to have an x,t diagram instead of an t,x. Do you know how i can change that?
Thanks for making this video! It was very helpful. For my experiment I need to deduce the angular velocity of a spinning skater. I was wondering is it possible to do it with using this software? If so how?
If you have a view from above it's easy because you can track an arm or something else that rotates. If not, then your best bet is to simply measure the mean time per rotation and determine angular velocity from that period.
Grazie di tutto, molto utile!
Is the tracker still available because I cant find it
Kindly, can you provide us with video to show how we can measure bubble frequency on Tracker
Hey Douglas, Thanks for this great tool! I was wondering if there is a possibility to analyze videos with a changing perspective? And 3D movement?
Yes, the perspective filter can change from one frame to the next. Read about it in Help.
Great program and useful presentation
amazing
How do I change quicktime option to xoggle?
Do you know what is problem with Tracker when it says " It can't work with this file style" (I tried mp4 with H264 Codec, mov, and avi style)
I suggest you ask this question on the Tracker forum at www.compadre.org/osp/bulletinboard/ForumDetails.cfm?FID=57 You'll need to create an account, but it is free and easy. You should also put more detail into your question. See www.compadre.org/osp/items/detail.cfm?ID=16061 for reporting guidelines.
Really awesome piece of software. Only gripe so far is my 120fps video gets treated as 30fps and there doesn't seem to be a way to change this.
You can set the frame rate and frame dt in the Clip Settings, 5th button on the toolbar.
Thanks, makes things much easier.
When I upload a video the calibration stick or any other function is not working. why is that
Estou tendo problema na utilização do tracker. Gostaria de saber se alguém já utilizou gravando com celular. A qualidade dos vídeos não estão ficando boas quando passo para o software. Mesmo gravando em full Hd.
Hello. Please, I have a video file of 9 GB, that runs for an average time of about 10 minutes. Can I use Tracker to do my analysis?
Probably. You might have to cut your video into smaller pieces, analyze separately and combine the data. If you have a problem loading your video try converting it to a different format like FLV.
Thanks a lot. I am physiotherapist interested in researching biomechanic of falls. Now i will be able to analyze simple variables form smartphone-made movies! This soft is exactly what I need. Explanation was perfect, dont listen to others, you sound like experienced mentor
Thank U
is it possible to export the data table to a comma-seperated textfile or Excel?
Sure, just use File|Export|Data File. Or right-click the data table and choose Copy Selected Cells, then paste into Excel.
Douglas Brown thank you!
Thanks for this great software. Really appreciate it. If this works for several particles/masses and to take the average of them, this can even be used in research purposes too. Please consider it for this free software
Thanks! Tracker is indeed used widely for research.
Thanks!
Is there any way to set a specific/different metric like millimetres on the calibration stick?
You can use any units you want since they are not shown, it just depends on how you calibrate. If you calibrate in mm, then the units are mm. BTW units will be included in the upcoming version 5.0.
Yes. The latest Tracker lets you set the units.
Hi, I’m new in using Tracker and wanted to ask how could I use it to estimate the speed of an object in a GIF? For reference, I made a GIF using GIPHY and tried to upload it on Tracker by dragging it directly on the blank page - but I couldn’t make it work, and I’m now stuck. Thanks in advance for the help.
If your gif won’t open in Tracker then there’s probably something wrong with it. Does it play automatically in a browser? Once it’s open you’ll need to set the frame rate in the clip settings and calibrate the scale.
Required audio or video track is missing when I click on the email
Hi, How can i get the "galileo's projectile" .mov file? it is not in the downloaded installation file and not in the "sample videos" on the site
Amit Porat It used to be available from the LivePhoto project but I don’t think you can get it any more. Try making your own 😀
Hi,I am trying to simulate the sloshing phenomena. i have got the video file of the sloshing. Now I want to get the plot of amplitude of free surface variation with time. So in tracker which tracker option should I select??
Use a point mass to track the surface at a single horizontal position. If you use the autotracker, rotate the axes so the x-axis points up and check the "x-axis only" box in the autotracker dialog.
@@trackervideotool thanks for the reply. I tried doing this.But I am not getting desired results, i.e I am getting pointed graph,not a smooth curve,
I should get repeated sinusoidal variation with beats.
Any idea how to do it?
@@sajidmomin7759 it’s impossible to know what the issue is without seeing the video. Have you looked carefully at the marked points to see if they are reasonable? Have you tried marking the points by hand?
@@trackervideotool i saw the video,I am getting graph,but that graph is not smooth
how do I check my previously done projects? because when I saved changes and went back into the app, it was gone.
When you save changes it saves a file with extension .trk. The first time you do this you must name the file. After that it saves changes to the same filename. You should be able to search for that file and open it in Tracker.
@@trackervideotool thanks a lot
I have a high definition video on ".mov" here on my computer... But when i try to open it on the program it says: "the video can not be opened".
What should I do?
I don't know if its too late but you have to install the full program and not just the .Jar file www.cabrillo.edu/~dbrown/tracker/ (The Installer) you might also need a program called Xuggle which you can find here www.compadre.org/osp/items/detail.cfm?ID=11606....I had the same issue and this fixed me!
FreakonFlight Thank you man. I'll try it out!
No problem (:
how can you rotate the view of the motion. Cuz i have taken my video vertically but whenever i open it in tracker, the motion comes horizontal
Dhruv Shrivastava Just apply a Rotate video filter. Use the Video|Filters|New|Rotate menu item.
Ok thanks
can multiple objects be tracked at the same time and info extracted by excel?
+Collins Allan No, only one object can be tracked at a time.
Hi,
how to constantly monitor the distance between two points using tracker. In case I want to monitor the expansion or contraction of an object
If the points are two different point masses the you can create a tape measure and attach the ends to the points.
Hello Mr. Brown,
I would like to change the coordinate system as a function of time. I have a video where the camera is not being held stationary, and I'd like to have the axes track to lines on the background of the video automatically. Is this possible with this software? I have so far been unable to find how to do this.
+Daniel Walsh Easy--just uncheck the "Fixed Origin" box in the Coordinate System menu, display and select the axes, then step through the video and shift-click to mark the origin manually in each frame. If you want to do it automatically use the autotracker. For more info, see Tracker Help or look at the Tracker Autotracker Tutorial at ua-cam.com/video/Dn0Zz7rtkZw/v-deo.html. BTW if it's a hand-held camera, you may have a varying tilt also. In this case you may want to use Calibration Points to set both the origins and angles.
+Douglas Brown Yes, I need to track both translation and rotation of the axes. I figured out how to autotrack a point mass in the software, but after a couple of hours I couldn't figure out how to autotrack the origin and angle of the axes. What am I missing?
More specifically, the issue is that when using the two calibration points, I can set one of them, and it autotracks just fine, but then when I go to set the other one, tracker "forgets" the tracking for the first calibration point. Why is this happening?
+Daniel Walsh You've discovered a bug, Daniel--thank you! I will fix it ASAP.
+Douglas Brown Great, I'm happy to have helped discover an issue. I ended up using the method whereby the origin and x axis autotrack, and this worked great. I was using the Mac OS version, by the way.
How do you change the orientation of the video on tracker?
Nevermind
my video is 15G, but when I put it to tracker, it only have 8 seconds.
I made a video with my phone and i could put it in tracker, but it wasn't in there the right way. How can you tilt it??
Use a Rotate video Filter (Video|Filters|New|Rotate).
Our teacher that we should watch this video.
THANKS
Douglas I downloaded video tracking from your link I have applied for a work at home with Assurance they send me an email to practice a window when I click on the link will not open the screen
Donna, I don't know what you mean. I never sent you a link. Better check back with Assurance??
you probably won't see this in time, but tracker keeps rotating my video the wrong way, is there anyway I can fix that?
Choose Video|Filters|New|Rotate to rotate or reflect the video.
Thanks a lot for this vedio. There is problem faced me when I import .mp4 vedio, this message appears "File cannot be loaded: E:/tracker program/ track.mp4"
How to do slow motion at this program? Bcs I think my object is not detected by it
If you have a high frame rate video (slow-mo) you should set the frame rate in the Clip Settings. Not sure what you mean by object not being detected. If you can see it in the video then you can track it.
What I mean about the object was not detected bcs it was to small. So I changed it into the bigger one and it works. Anyway, thank you Mr.Brown🖒
Hi Mr. Brown, thanks so much for the video. I've been having some problems with Tracker, though, and I was wondering if you knew anything about how to solve it. I can get an x-t graph from clicking manually, but I can't get a vx-t or any other kind of graph from it. When I look at the data table, it doesn't record any of those values. The only time it records those is when I enable auto tracking. Any idea what's going on here? Thanks!
Check to see if you have turned off auto-refreshing. Click on the right-most button on the toolbar and make sure the Auto-refresh box is checked. Choose Refresh to immediately refresh plots and tables. Does this do the job?
hey guys do you know why I can't see my calibration stick even if I set it "visible"
You have to mark it by shift-clicking where you want the ends of the stick to be (see instructions on the toolbar). You can adjust after. You can change the preference to make the stick draw itself if you prefer.
Wondering if I could utilize this to track a golf ball that I hit into a net........interesting.
The software won't let us open .mov files recorded with an iPhone 11, anyone knows why this might be?
iPhone 11 by default uses a new High Efficiency HEIF/HEVC codec that is not supported by Tracker. You can either change the video format in your iPhone (Settings|Camera|Formats) or convert the videos to a different format (eg FLV or MP4 with H.264) with a separate video converter application.
@@trackervideotool Thank you!
Where do I get the software to install video tracker
physlets.org/tracker/
Where do i download it?
physlets.org/tracker/
THAT NOSE WHISTLE AHHHHHHHHHHHHHHHH
How do we rotate our video if it is upside down after we import it?
Just apply a rotate video filter (Video|Filters|New|Rotate).
@@trackervideotool I tried rotating a potrait video into a landscape format, but the canvas remains potrait. With this issue i was unable to track some parts of the video that went outside the potrait white canvas. How do I fix this problem?
@@carlt9003 Hi Carl, that is a bug which will be fixed in the next release very shortly. In the meantime you should be able to enlarge the background mat with the Edit|Mat Size menu.
I try to do that but my video does not open. It's a .mov.
Can someone please help me?
Check Help|Diagnostics|About Xuggle. If Xuggle is working right then it's probably a codec issue and you'll have to convert your video to a different format. There are free video converters that work fine. FLV is a good format for Xuggle.
how do i save a graphic?
You can copy an image of the main view, any other open view, or the entire frame to the clipboard using Edit|Copy Image. Or Choose File|Export|Thumbnail Image to save an image file of the main view or entire frame. The "thumbnail" can be full size--pick a size from the dropdown. Is this what you had in mind?
alguien conoce una alternativa a este software ya sea de paga o gratuito? // Does anyone know of an alternative to this software, either paid or free?
How to create other equation fit?
Do you mean in the DataTool? Choose Help in DataTool and look at #6. Fitting mathematical models to data. Scroll down to the section "Defining custom fit functions".
How to find the distance of an object whose motion is non-linear???
The data variable L (path length) measures the total distance along the path of a point mass. Is this what you want?
Who make tracker
an url or a link to DL tracker ?
No idea what you're talking about. What is DL tracker?
@@trackervideotool Sorry Sir, please accept my apologies for my previous misformed sentence.
Is it possible to have an url / link to download your software "tracker" in order to test it?
Thank you for your help Sir.
@@antoninperbosc1532 physlets.org/tracker/
@@trackervideotool Thank you very much Mr. Douglas Brown for the link! I wasn't notified by youtube that you added a response and I have no idea why ... again thanks for sharing with us Tracker.
I'am a bit early but let me wish you a happy new year 2022 Mr. Douglas !
nice! Xd :)