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Built In Export Function on Multiple Files

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Hello,

I'm wondering if there is a way to use the built-in export function on multiple files.

The formatting the built-in export uses is exactly what I'm looking for, just with multiple files. The tutorial in the scripting section creates a file that looks different and did not work for me.

Is there a ruby file somewhere in the application data that performs this export? If so, I can write my own script that will iterate through a folder and perform the logic to create an export for each file.

If there is anymore information I can provide, please let me know.

Thank you!!


Manual notation

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What does 'ET' stand for in the manual?

Intervals play differently on different computers

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Our research team is coding our data in 15-second intervals and we have a script to generate columns in 15-second intervals. However, we've noticed that the way Datavyu plays these intervals differs from one computer to another. When we 'snap' the interval, Datavyu on one of our computers ends each interval a second or two sooner than Datavyu on another computer. And Datavyu on one computer consistently starts playing only about 3-5 seconds after the interval start time (the video is just frozen for the first couple of seconds). Even if it is only off by a few seconds, it makes a difference because we're coding in such short intervals. Is there any way to fix this so that it is the same across different computers? Or does it depend on how new or upgraded the computer is?

Jog and Find Issue

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We are using Datavyu 1.3.4 on our MAC computers. When playing a video and we click on "stop" then attempt to jog forward one frame at a time, it skips ahead a couple of frames. It will not let us move forward one frame at a time the first time we try to. Then, after we jog backwards, it will let us go one frame at a time.

Also, sometimes when we hit "find" the time changes on the Datavyu controller, but the video does not move forward. When we push "play" both the time and video go forward but the video is not at the correct time.

Is there anything we can do about these issues? Thanks for your help

mute audio

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Is there a way to mute an audio stream? I have multiple audio streams and sometimes need to listen to only one.

I see it for QT videos but not for VLC.

Scripts for better exports

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We'd like to streamline our exports from Datavyu so they're easier to analyze later. A couple of key points have come up that would be helpful and it seems likely that scripts for these processes already exist. If so, could you point us toward them? If not, could you advise us how to write such scripts?

1) Export columns in the order we created during coding, not in ABC order. 2) Export onset/offset timestamps in seconds, not in milliseconds. 3) Export rows to reflect temporal alignment/nesting

Thank you!

Issue with scripting for intervals

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I am a complete Datavyu and Ruby novice, so it is possible this is a wholly elementary issue....

I am coding videos of mother-child dyads. I am trying to develop a script that will generate a spreadsheet for each dyad (one dyad per video), with a column for mom and a column for child, and multiple codes within each column. I want to code in 10 second intervals. The videos themselves vary in length, some being 15m on the nose and some being slightly longer, so the script needs to accommodate that the number of potential 10s intervals varies by video.

Right now, my script runs but generates a spreadsheet with a few issues:

  1. there are no offset times (probably I have a basic mistake in my script? how do I tell it to set the offset?)
  2. it generates 121 intervals regardless of the video length -- is there a way to cut it off from making new intervals after the video ends or do extra intervals need to be removed manually?
  3. the intervals in the mom and child columns sometimes do not align, they are offset by 30 seconds. sometimes this goes away on its own when I click on the spreadsheet...any rhyme or reason why that might be happening?

Thank you for any assistance!

Here is the script:

require 'Datavyu_API.rb'
begin
    mom = createColumn("mom", "praise", "critique")
    for i in 0..120
        time = i * 1000 * 10
        cell = mom.make_new_cell()
        cell.change_code("onset", time)
    end 
    setColumn(mom)
        child = createColumn("child", "persist", "quit")
    for i in 0..120
        time = i * 1000 * 10
        cell = child.make_new_cell()
        cell.change_code("onset", time)
    end
    setColumn(child)
end

Supported Video Extensions

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I'm trying to "Add Data" using a video with an .m4v extension. This opens fine in Quicktime, which leads me to believe that it should be supported by Datavyu (since the FAQ page says "Datavyu supports all video formats that Quicktime or VLC can play"). However, when I try to use the "Add Data" button in the controller, it gives me an error message that says "Could not open data source: Could not initialize class quicktime.io.QTFile".


Reverting to Previously Saved Version

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I'm an idiot and accidentally saved over a Datavyu opf file that was saved to a Desktop and not properly backed up. Is there any way to retrieve the old file?

Media Files Don't Play Smoothly

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I am having trouble with media file playback. Files will play for several seconds, then pause briefly, then jump forward. The files play normally when I watch them in quicktime or vlc. (The files are in mp4 format and we play them in datavyu through quicktime.) Has anyone run into similar issues? Any troubleshooting suggestions?

Does Datavyu have a video editing feature?

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I would like to know if Datavyu has the option to edit a video file that is being used. For example, could the user trim part of a video? Thank you for taking the time to answer my question.

Saving issues! Can you help?

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Hey everyone, I have a huge problem with the datavyu-program. I downloaded the "stable" version on my mac book and started working with it by adding a video and starting to code with the spreadsheet. The problem is that it seems to be impossible for me to save my progress. If I try to reopen a previously saved file (I pressed the "save"-button and closed the coding window) an empty spreadsheet will appear and no video. I tried to save the project under a new name and what happened was that the progress was saved under the original file and the new file was empty. But not even that works anymore. It seems to me that the "save"-button is a "delete"-button! I would be very grateful for helping ideas as I already lost a lot of work and time trying to fix this... Thank you in advance!!

Can you import csv files into Datavyu?

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Is it possible to import csv files into Datavyu so you don't have to code them again?

Coding behaviors within trials

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Hello - this question concerns how to set up coding columns for coding projects that involve trials. Should trial start/stop be one column, and the particular behavior of interest (here, looks left, right, or center) be another column?

Thank you for your insights and guidance!

changed filename and path

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Hello.

(I think there was a similar question about changed paths, but I do not understand the answer.)

I had to change the directory structure for my study’s videos. As a result, the paths to these videos and the videos’ filenames have changed. Now when I open an .opf file, the message, “The following files are missing.” Is there any way of telling the app the new file path and filename? Can I somehow modify the .opf file to update the filenames?

I have multiple videos aligned and synchronized with each other in my .opf files. (How) are the alignments preserved if I need to re-add all the videos? Is there something I had to do before the paths and filenames were changed?

Thank you.

I am using a PC, running Windows 7. I am using both VLC and QT (depending on the video file.) I have version 1.2.2


exporting specific cells from mutex column

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Hello,

I am using a mutex column and want to export only very specific cells from that column. In essence I want to export the cells for which the comparison column does not have corresponding cells (I am looking for percent disagreement). Is there a simple way to do this?

Thank you.

coding looks within trials

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I need to code looks left, right, center during trials. I need the start/stop for each trial as well as the start/stop for each look. There can be several looks within a single trials.

How can I get a single "cell" within a column to nest looks (with times) within a trial (also with start/stop)?

I appreciate any advice / guidance, as my trial-and-error approach has not been as productive as I had hoped. Thank you!

How does the "create_mutually-exclusive" command work?

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For continuous codes, the “create_mutually-exclusive” will create a new column just for the purpose of disagreement check, right? The cells won’t have a value unless the two coders disagree? What if I want to allow some time window for the coders to disagree slightly on onset and offset times?

Can I run statistical analyses in Datavyu?

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  1. The correlations you use for reliability check can only be done outside datavyu, once the data are exported to a stat program, right?

  2. Similarly, if I want to compute the durations and frequencies of the coded behaviors, I have to do it outside datavyu in an external stat program, right?

Batch operations on columns

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Can scripts be used to perform batch operations on columns themselves (not just the codes within columns)? For example, if I want to rename the 3rd column in several spreadsheets, can this be accomplished with a script?

I found instructions in the user guide for renaming codes with an RColumn Class script, and it looks like this could be modified for a batch operation pretty easily. However, I have not found any information on using scripts to change column names. Does anyone have a script that accomplishes this or suggestions for an alternate approach?

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