<div dir="ltr">Thank you, this is great information, and it turns out I can get Matlab through my employer. For now, however, I'm trying a more off-the-shelf approach, based on the utility Macro Recorder (<a href="http://www.macrorecorder.com">www.macrorecorder.com</a>) and Windows Video Editor.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Aug 3, 2021 at 6:26 PM Tony <<a href="mailto:galaitsis@verizon.net">galaitsis@verizon.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>Hi Jonathan,</p>
<p>This is a follow up to my call earlier today. MATLAB-2021 has a
script (VideoReader.m) that I believe will address your needs. I
just hope that you have access to MATLAB-2021 through your MIT
connections.</p>
<p>Following is an excerpt from my friend's email in response to my
inquiry about the 3D capability (x-y pairs vs time/frames):</p>
<p>"</p>
<pre><font color="blue">My version of MATLAB (2021a) has a function called "VideoReader". It reads in an MP4 file and returns an object with describing the frames and various other properties. I have only tried the example provided by MATLAB, so I don't have a lot of knowledge about this feature.
Using the example from my MATLAB installation, I've made a script that plays the example MP4 file frame by frame:
vidObj = VideoReader('xylophone.mp4');
vidObj.CurrentTime
while(hasFrame(vidObj))
frame = readFrame(vidObj);
imshow(frame);
title(sprintf('Current Time = %.3f sec', vidObj.CurrentTime));
pause(2/vidObj.FrameRate);
end
The file "xylophone.mp4", comes with the MATLAB installation
This is all Windows based, so I don't know where MACs have a default installation for a user.
</font></pre>
<p><font color="blue">"</font><br>
</p>
<div>If I can be of any further help, please
let me know.</div>
<div>Cheers,</div>
<div>Tony Galaitsis</div>
<div>781-718-7847</div>
<div><br>
</div>
<div>==============</div>
<div>On 8/1/21 12:31 PM, Tony wrote:<br>
</div>
<blockquote type="cite">
<p>Jonathan,</p>
<p>I have something that with some modification might help you get
that information. <br>
</p>
<p><u><i><b>Question</b></i></u>: Youtube videos list the running
time (low-left part of frame) at rounded-off 1-sec intervals.
Would the 1-sec tolerance be sufficient for your needs? <br>
</p>
<p><u><i><b>Comment: </b></i></u>My tool is MATLAB-based but we
can work around that. <br>
</p>
<p>Please call me off line to discuss, if you have not found an
alternate solution. I will follow up with a call, too.</p>
Tony Galaitsis<br>
781-862-3607<br>
<p>==============<br>
</p>
<div>On 7/31/21 10:14 AM, Schonfeld wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">I want to measure how new-track
starting locations are distributed around the decay source.
Quantum mechanics makes a clear prediction but, remarkably, it
has never been tested (to my knowledge). Times or frame
numbers are nice-to-have. I could do without them.</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sat, Jul 31, 2021 at 9:54
AM Steve Isenberg <<a href="mailto:smisenberg@gmail.com" target="_blank">smisenberg@gmail.com</a>> wrote:<br>
</div>
<blockquote class="gmail_quote">
<div dir="auto">Jonathan,</div>
<div dir="auto">What are you trying to accomplish? What is
your goal, what would you do with the coordinates or frame
numbers?</div>
<div dir="auto">You might be able to grab this info manually
using video editing software but I don’t know a way to do
it automatically. Maybe there’s an app??</div>
<div dir="auto">-steve </div>
<div><br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sat, Jul 31, 2021
at 9:46 AM Schonfeld <<a href="mailto:jschonf@gmail.com" target="_blank">jschonf@gmail.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote">
<div dir="ltr">Hey wizards - Maybe someone can suggest
a solution to the following question:
<div><br>
</div>
<div>I've downloaded a YouTube video as an mp4
file. (It's a video of tracks emanating from a
small radioactive source in a cloud chamber.)
From time to time I want to point and click on a
feature in the video (the starting point of a new
track) and have the coordinates and time (or frame
number) of the click automatically written to an
Excel file. I mostly use a PC but I could easily
move to a Mac or iPad. Do you know any simple
ways to do this? - Jonathan Schonfeld</div>
</div>
===============================================<br>
::The Lexington Computer and Technology Group Mailing
List::<br>
Reply goes to sender only; Reply All to send to list.<br>
Send to the list: <a href="mailto:LCTG@lists.toku.us" target="_blank">LCTG@lists.toku.us</a>
Message archives: <a href="http://lists.toku.us/private.cgi/lctg-toku.us" rel="noreferrer" target="_blank">http://lists.toku.us/private.cgi/lctg-toku.us</a><br>
To subscribe: email <a href="mailto:lctg-subscribe@toku.us" target="_blank">lctg-subscribe@toku.us</a>
To unsubscribe: email <a href="mailto:lctg-unsubscribe@toku.us" target="_blank">lctg-unsubscribe@toku.us</a><br>
Future and Past meeting information: <a href="http://LCTG.toku.us" rel="noreferrer" target="_blank">http://LCTG.toku.us</a><br>
List information: <a href="http://lists.toku.us/listinfo.cgi/lctg-toku.us" rel="noreferrer" target="_blank">http://lists.toku.us/listinfo.cgi/lctg-toku.us</a><br>
This message was sent to <a href="mailto:s%2Blctglist@smistuff.com" target="_blank">s+lctglist@smistuff.com</a>.<br>
Set your list options: <a href="http://lists.toku.us/options.cgi/lctg-toku.us/s+lctglist@smistuff.com" rel="noreferrer" target="_blank">http://lists.toku.us/options.cgi/lctg-toku.us/s+lctglist@smistuff.com</a></blockquote>
</div>
</div>
</blockquote>
</div>
<br>
<fieldset></fieldset>
<pre>===============================================
::The Lexington Computer and Technology Group Mailing List::
Reply goes to sender only; Reply All to send to list.
Send to the list: <a href="mailto:LCTG@lists.toku.us" target="_blank">LCTG@lists.toku.us</a> Message archives: <a href="http://lists.toku.us/private.cgi/lctg-toku.us" target="_blank">http://lists.toku.us/private.cgi/lctg-toku.us</a>
To subscribe: email <a href="mailto:lctg-subscribe@toku.us" target="_blank">lctg-subscribe@toku.us</a> To unsubscribe: email <a href="mailto:lctg-unsubscribe@toku.us" target="_blank">lctg-unsubscribe@toku.us</a>
Future and Past meeting information: <a href="http://LCTG.toku.us" target="_blank">http://LCTG.toku.us</a>
List information: <a href="http://lists.toku.us/listinfo.cgi/lctg-toku.us" target="_blank">http://lists.toku.us/listinfo.cgi/lctg-toku.us</a>
This message was sent to <a href="mailto:galaitsis@verizon.net" target="_blank">galaitsis@verizon.net</a>.
Set your list options: <a href="http://lists.toku.us/options.cgi/lctg-toku.us/galaitsis@verizon.net" target="_blank">http://lists.toku.us/options.cgi/lctg-toku.us/galaitsis@verizon.net</a></pre>
</blockquote>
</blockquote>
</div>
</blockquote></div>