Timing Analysis Spreadsheet forTiming Analysis Spreadsheet forPre/Post Time Stamped VideosPre/Post Time Stamped Videos

Presented to 2013 IOTA Annual MeetingPresented to 2013 IOTA Annual Meeting

Brad Timerson, Tony GeorgeBrad Timerson, Tony George

BackgroundBackground

Technique pioneered by Scotty Degenhardt for his multi-Technique pioneered by Scotty Degenhardt for his multi-station deploymentsstation deployments

Makes use of scripting in AviSynthMakes use of scripting in AviSynth Uses time stamp on many commonly used digital Uses time stamp on many commonly used digital

camcorderscamcorders

Why do this?Why do this?

It became necessary for others to learn these techniques It became necessary for others to learn these techniques when observations were received and no one was available when observations were received and no one was available

to do the analysisto do the analysis

Brad Timerson and Tony George worked together usingBrad Timerson and Tony George worked together using

Scotty’s original spreadsheet as a template Scotty’s original spreadsheet as a template

to create a new form.to create a new form.

We received help from John Talbot on the final product. We received help from John Talbot on the final product.

A Word document describing the procedures is availableA Word document describing the procedures is available

along with the new spreadsheet.along with the new spreadsheet.

This presentation provides a brief overview of the process.This presentation provides a brief overview of the process.

Basic StepsBasic Steps

1.1. Download and install AviSynth 2.5Download and install AviSynth 2.5

2.2. Install PlugIn called: DVInfoInstall PlugIn called: DVInfo

3.3. Create/Receive video file for Pre-, Post-, and Event Create/Receive video file for Pre-, Post-, and Event (the pre- and post- videos are time stamped and have time insertion on them)(the pre- and post- videos are time stamped and have time insertion on them)

4.4. Create AVS script.Create AVS script.

5.5. Use AVS scripts with LiMovie to get input needed for Use AVS scripts with LiMovie to get input needed for spreadsheet.spreadsheet.

6.6. Complete spreadsheetComplete spreadsheet

Associate time stamp with UTCAssociate time stamp with UTCOpen Pre- video in LiMovie. Open Pre- video in LiMovie.

Find UTC associated with next whole second Find UTC associated with next whole second

of the time stamp.of the time stamp.

Here we incremented video until next second (:21) to get UTC from time inserter (18:26:21.7536). You need the time stamp

(06:26:21 PM) and the UTC.

Associate time stamp with UTCAssociate time stamp with UTCNext, open Post- video in LiMovie. Next, open Post- video in LiMovie.

Find UTC associated with next whole second Find UTC associated with next whole second

of the time stamp.of the time stamp.

Here we incremented video until next second (:30) to get UTC from time inserter (9:13:31.7897). You need the time stamp

(09:13:30 AM) and the UTC.

Analyze Event VideoAnalyze Event Video

Analyze video to obtain CSV file Analyze video to obtain CSV file

Get fractional event timesGet fractional event times (from Occular, for example)(from Occular, for example)

Open video in LiMovie. Move to location before the frame.Open video in LiMovie. Move to location before the frame.

Find frame where time stamp increments to next second.Find frame where time stamp increments to next second.

Record time stamp time. Record time stamp time.

Find number of frames from that location until the event.Find number of frames from that location until the event.

Location of the D eventLocation of the D event

Occular showed D at frame 284.8 Occular showed D at frame 284.8

At frame 255, time stamp incremented At frame 255, time stamp incremented

to next whole second. to next whole second.

Record 07:13:30 AM.Record 07:13:30 AM.

Next record (284.8 - 255) or 29.8 frames.Next record (284.8 - 255) or 29.8 frames.

Repeat for R eventRepeat for R event

Occular showed R at frame 554.1 Occular showed R at frame 554.1

At frame 525, time stamp incremented At frame 525, time stamp incremented

to next whole second. to next whole second.

Record 07:13:39 AM.Record 07:13:39 AM.

Next record (554.1 - 525) or 29.1 frames.Next record (554.1 - 525) or 29.1 frames.

Spreadsheet EntrySpreadsheet Entry

Open spreadsheet. Be sure the yellow cell at Step 9 is empty.

Spreadsheet with EntriesSpreadsheet with Entries

Last step is to enter value in green cell of Step 9 into the yellow cell for that step.

Files Needed or AvailableFiles Needed or Available

Blank SpreadsheetBlank Spreadsheet Word document outlining proceduresWord document outlining procedures AVS scriptAVS script Sample completed Spreadsheet Sample completed Spreadsheet

(for date/time format which is critical)(for date/time format which is critical)

Links for download sites are in the Word file.Links for download sites are in the Word file.

All files will be placed within a zipfile on the North AmericanAll files will be placed within a zipfile on the North American

Asteroidal Occultation webpage.Asteroidal Occultation webpage.

AcknowledgementsAcknowledgements

The authors acknowledge and thank Scotty Degenhardt forThe authors acknowledge and thank Scotty Degenhardt for

pioneering the use of the time stamping technique and forpioneering the use of the time stamping technique and for

his original spreadsheet. We also thank John Talbot forhis original spreadsheet. We also thank John Talbot for

fixing formatting issues within the spreadsheet and forfixing formatting issues within the spreadsheet and for

verifying that it works as expected.verifying that it works as expected.

Brad Timerson, Tony GeorgeBrad Timerson, Tony George

October 2013October 2013