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Does Tracker have a file size limit? post and replies

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Initial question - Jan 14 at 2:03PM
Noah Allen
2 Posts

Hello all, I am using Tracker to try and measure strain with respect to applied load (time syncing Tracker's analysis of a video file with load data). The displacements due to load are quite small, so I am shooting video at 4K and 30 frames per second, to maximize detail and let AutoTracker pick out small movements of my markers.

I have tested Tracker with smaller files at 4K (up to about 150 MB) with no problem, but the full experiment is over four minutes long and 3 GB in file size. So, I suppose, getting back to the topic of the thread, does Tracker have a cap on how large files can be before the software will not analyze them?

Thank you.


Replies to Initial question

Re: Initial question - Jan 14 4:52PM
Douglas Brown Avatar
Douglas Brown
223 Posts

There's no built-in cap on file size but Tracker can become very slow with large files and image dimensions.  I recommend you experiment with breaking the video into shorter segments and then combining the data.


> Re: Initial question
>
> Hello all, I am using Tracker to try and measure strain
> with respect to applied load (time syncing Tracker's
> analysis of a video file with load data). The displacements
> due to load are quite small, so I am shooting video
> at 4K and 30 frames per second, to maximize detail
> and let AutoTracker pick out small movements of my
> markers.
>
> I have tested Tracker with smaller files
> at 4K (up to about 150 MB) with no problem, but the
> full experiment is over four minutes long and 3 GB
> in file size. So, I suppose, getting back to the topic
> of the thread, does Tracker have a cap on how large
> files can be before the software will not analyze them
>
>
> Thank you.



Re: Initial question - Jan 16 2:42PM
Noah Allen
2 Posts

Douglas:

Thank you for the reply. Similar to your solution (as far as reducing file size), I decided to use the time lapse mode on my camera to shoot fewer frames (as the motion is very slow) while retaining a sufficiently high resolution for AutoTracker to reliably track the points I was interested in. It worked beautifully.


As an aside, special thanks for programming Tracker -- it has made data analysis on this project remarkably easy.

Best,

Noah



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