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Tutorial: Processing videos to assess

the time individuals spent at the

feederLilianasinternship

2014.02.26

Dominance and access to the foodresource

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Objectives

For two hoursof feeding per video maximum:

Record the time each individual spent in the periphery area =

OUT zone

Record the time each individual spent in the feeder area =IN zone

Record with a binomial variable (0 = feed on the edge; 1= feed

inside the feeder) whether each individual are feeding from

the edge of the feeder or from inside =Feed.in

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Zone IN

Zone OUT

This one feeds inside the IN zone and you will

have to write 1 in the feed.incolumn

because it is feeding inside the feeder

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Files and software

Download the latest version of VLC (free)

Open VA resource alim 2013-2014 _ L

Open the video you have to process with VLC

NOTES:1. If you cannot read the video smoothly from the hardware using VLC, you mayneed to copy the video first on your computer if this does not solve the pb,that means your graphic card is not powerful enough which means we willhave to find another computer

2. Try to be organized, keep track of videos you have processed already etcMaybe create an excel file where you list all the videos you have to analyze

and a variable showing if you did it or not It is also quite interesting to havewritten the bout of time where birds are seen at the feeder OR moreconvinient, the bout of time where no birds are around (it helps if we have tolook at the video again)

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VLC tips

Use the key - to slow down a playback

Use the key + to accelerate a playback

The more you press these keys, the

faster/slower the video is played.

Use the keyboard main tab to pause theplayback

When no bird are around, move the cursorforward from about 10s (not more otherwiseyou may miss things)

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Before you press the start button

From file: VA resource alim 2013-2014 _ L

Enter year, month, day, col, processor (= your initial)

time start, time end, duration of the video (if less than 2hrs,

note it and process the video until the end, if > 2hrs, do only 2hrs: its painfulenough!).

Have a look at my behavioural observation file

to extract the ID of the birds I have observed

around. It will facilitate the ID determination from thevideoFilter per colony

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How to write colour IDs

BK = BLACK

DB = DARK BLUE

EG = EMERALD GREEN

FP = FLUO PINK LB = LIGHT BLUE

LG = LIGHT GREEN

OR = ORANGE

PS = PINK STRIPE (black bandwith fluo-pink stripes)

RE = RED

VI = VIOLET

WH = WHITE

WS = WHITE STIPE (black

band with white stripes) YE = YELLOW

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Colour IDs have to bewritten with the followingorder

Upper left; Lower left; upperright; lower right

Left hand side is the left leg of thebird (on the left when you look at the

back of the bird)For instance: the bird on the pic isYEWHYEM

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One more example:

This one is WHREYEM

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How to write ID with missing ring

UR = Code for missing ring (UnRing)

If the colour ring above the metal ring is

missing, always write URM

If one colour is missing from the leg with no

metal ring, always write the color code first

ORUR or DBUR or REUR or LBUR etc

Example: ORURURM has one colour missing and one orange

band on the left hand side and just a metal ring on the right

hand side.

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For example:

This one is

EGURYEM

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Be aware of

Light Blue (LB) and White (WH) are very very

tricky, hard to differentiate on videos, make sureyou do not have birds that differ only from those colours. If it is the case

and you have trouble, email/skype me (i.e. at colony 27 there are a

LBORORM and a WHORORM)

DB and BK can also be a bit tricky when the light is notgood but usually, the exposure change and the confusion vanishes

Be very careful not to omit any time and toenter time correctly

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For example:

This one is

LBLBYEM and not

WHWHYEM luckily,in that colony there is no

WHWHYEM so it makes

thing easier

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With the next slides, I have attempted todescribe you as best as possible how I proceedto process a video (so what you should do!)

In that example, we are looking at whathappens from 1hr 08 min 15 sec after westarted the camera & positioned the feederunder the colony

To simplify, I used A,B,C,D,E,F instead ofColour IDs

Example of video processing

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A

B

CE

D

F

1h08m15s

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Yr Mth Day Col Proc

.

AM/

PM

IN/

OUT

ID.

Col

Start End Duration Total

Video

Fee

d.in

2013 09 9 33 MR PM OUT A 1:06:09 02:00:00

2013 09 9 33 MR PM OUT B 1:07:52 02:00:00

2013 09 9 33 MR PM OUT D 1:08:02 02:00:00

2013 09 9 33 MR PM OUT E 1:07:08 02:00:00

2013 09 9 33 MR PM OUT F 1:02:05 02:00:00

2013 09 9 33 MR PM OUT C 1:08:01 02:00:00

2013 09 9 33 MR PM IN A 1:08:10 02:00:00 1

2013 09 9 33 MR PM IN B 1:08:12 02:00:00

2013 09 9 33 MR PM IN D 1:08:07 02:00:00

1. A few seconds before 1:08:15, these 6 individuals were all in the OUT zone. A,B,D,E,F,E

jumped over the green hoop and stayed at least 2 sec in the OUT zone therefore we

enter for each of them at what time they entered the OUT zone, we specified it is the

OUT zone considered here and we precise the ID.

The table should look like the one above

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A

B

CE

D

F

1h08m15s

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Yr Mth Day Col Proc

.

AM/

PM

IN/

OUT

ID.

Col


Video

Fee

d.in

2013 09 9 33 MR PM OUT A 1:06:09 1:08:10 =End-Start 02:00:00

2013 09 9 33 MR PM OUT B 1:07:52 1:08:12 00:00:20 02:00:00

2013 09 9 33 MR PM OUT D 1:08:02 1:08:07 00:00:05 02:00:00

2013 09 9 33 MR PM OUT E 1:07:08 02:00:00

2013 09 9 33 MR PM OUT F 1:02:05 02:00:00

2013 09 9 33 MR PM OUT C 1:08:01 02:00:00

2013 09 9 33 MR PM IN A 1:08:10 02:00:00 1

2013 09 9 33 MR PM IN B 1:08:12 02:00:00

2013 09 9 33 MR PM IN D 1:08:07 02:00:00

2. But then individuals A,B,D leaves the OUT zone (at respectively 1:08:10, 1:08:12 and

1:08:07 to start feeding directly from the feeder, standing on the edge for B,D. In the middle

of the feeder for A Enter the time they left the OUT zone inside the End column for each individual.

Use these times as a Start time for the IN zone for each of those 3 individuals

Also, individual A is feeding inside the feeder so do not forget to write 1 in the feed.in

column.

Careful, it is very easy to forget a End time, always check that the number of birds you

see in each zone (IN and OUT correspond to the data entry with no End time yet.

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A

B

CE

D

F

1h08m29s

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Yr Mth Day Col Proc

.

AM/

PM

IN/

OUT

ID.

Col


Video

Fee

d.in


2013 09 9 33 MR PM OUT B 1:07:52 1:08:12 00:00:20 02:00:00

2013 09 9 33 MR PM OUT D 1:08:02 1:08:07 00:00:05 02:00:00

2013 09 9 33 MR PM OUT E 1:07:08 02:00:00

2013 09 9 33 MR PM OUT F 1:02:05 02:00:00

2013 09 9 33 MR PM OUT C 1:08:01 02:00:00

2013 09 9 33 MR PM IN A 1:08:10 02:00:00 1

2013 09 9 33 MR PM IN B 1:08:12 02:00:00

2013 09 9 33 MR PM IN D 1:08:07 1:08:29 02:00:00

2013 09 9 33 MR PM OUT D 1:08:29

3. At 1:08:29

A, B are still in the IN zone

D left the IN zone, we need to create a new OUT entry

C, E, F, are still in the OUT zone.

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1h08m37s

A

B

CE

D

F

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FA

C

B

D

1h09m17s

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5. At 1:09:17

A is still in the IN zone (he may not be inside the feeder anymore but as he went at

least feeding from inside once during this bout, we keep the variable 1)

C is still in the OUT zone

D is still in the IN zone but went inside the feedertype 1 in the feed.in column

E left the OUT zone and the whole feeding areaenter End time in the OUT entry

for this ind.

F left the OUT zone to feed in the IN zone from the edge.enter End time in

the OUT entry and create a new IN entry with this same time for this ind.

B left the IN zone to feed in the OUT zoneenter End time in the IN entry and

create a new OUT entry with this same time for this ind.

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Yr Mth Day Col Proc

.

AM/

PM

IN/

OUT

ID.

Col


Video

Fee

d.in


2013 09 9 33 MR PM OUT B 1:07:52 1:08:12 00:00:20 02:00:00

2013 09 9 33 MR PM OUT D 1:08:02 1:08:07 00:00:05 02:00:00

2013 09 9 33 MR PM OUT E 1:07:08 1:09:17 00:00:09 02:00:00

2013 09 9 33 MR PM OUT F 1:02:05 1:09:17 00:07:12 02:00:00

2013 09 9 33 MR PM OUT C 1:08:01 02:00:00

2013 09 9 33 MR PM IN A 1:08:10 02:00:00 1

2013 09 9 33 MR PM IN B 1:08:12 1:09:17 00:01:05 02:00:00

2013 09 9 33 MR PM IN D 1:08:07 1:08:29 00:00:22 02:00:00

2013 09 9 33 MR PM OUT D 1:08:29 1:08:37 00:00:08 02:00:00

2013 09 9 33 MR PM IN D 1:08:37 02:00:00 1

2013 09 9 33 MR PM IN F 1:09:17 02:00:00

2013 09 9 33 MR PM OUT B 1:09:17 02:00:00

Check:

We have 3 birds that are supposed to be still in the IN zoneYES

We have 2 birds that are supposed to be in the OUT zone

YES

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More rules

Suppose individual E comes back to the OUT zone jumping over the

hoop and then crossing the OUT zone quickly to directly reach the IN

zone It is quite time consuming to create new row/entry for such

behaviour So if a bird stays < 2 sec in a zone, do not create a new entry

for that zone. Use the time the ind enters/leaves the first zone it crossed

as a start time.

Another rule, sometime they move from the edge just for a bit and come

back to the feeder, if this is < 2 sec, do not end the IN entry to create a

new OUT entry and then again a new IN entry

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General advices

BE PATIENT! Do not rush this analysis otherwise it is prone to

mistakes! And we need accurate data!

I know it can be painful, believe me, I am doing very intense videos at the moment for

which I can spend sometime 15min processing 1min of video because there are a lot

of movements between zones and a lot of birds! I have been as kind to you as possible

and I have spared you the most intense colonies!

When they are many birds at the same time, I found

sometime easier just to follow one bird (i.e. focal obs) at the

time for that crazy bout and then play the bout again andfocus on a second bird

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General advices

When your eyes start to be very red, your

brain painful and your nerves at the edge of a

breakdown Sit back, breath, relax, enjoy a

coffeetake a break and come back to itonce youve calm down

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Priorities

Start by colony 21 and colony 81

I will send you a list of 5 video ID for each

colony. You will start with those, then

probably 5 more. That means you will have

to analyze 20 videos of 2 hours

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Good luck!!!!!!!!!!!!!!!

If you have any questions

[email protected] I am usually on

skype for emergency (username: margaux.rat)
mailto:[email protected]:[email protected]

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