Flicker Free ETTR Timelapse: - -Beginners Guide & Basic Post Processing --

[Doyle4]

Sorry for another question,

On mac where do i put the images? when i run exiftool -Exposure2012+=-0.5 /path/to/ettr_sequence_folder i get

Doyles-MacBook-Pro:~ doyle$ exiftool -Exposure2012+=-0.5 /path/to/ettr_sequence_folder
Error: File not found - /path/to/ettr_sequence_folder
    0 image files updated
    1 files weren't updated due to errors

Im guessing the 2012 = how many images are in the folder and i change that to how many i have?

Solved: exiftool -Exposure2012+=-0.5 /*drag folder onto here*

[Doyle4]

Anyone know what type for shadows? i deleted -Exposure and replaced with -Shadows, it started to do something but said no files where updated.

Solved: I deleted the XMP's by mistake

[andyshon]

If this doesn't throw it, I don't know what will? The exposure changes and contrast in this shot are pretty extreme. And it copes beautifully. This really is an amazing tool for timelapse.

I'm still having problems with stability. And it's not predictable, at least not to my un-scientific brain. It seems to crash more often with quicker intervals, longer max exposures, but it can happen with any settings. The last exposure seems always to be lacking an XMP file, and is often (perhaps always) a different exposure than the previous frame.

Sorry I can't give better info but I really hope you can find the fault. I'm gonna switch back to an older build for the moment, 21st July seems stable on the 5D2.

The exposure in the above shot was ramped up by one stop in post, using a slightly modified version of the shell script above. Seems to work quite well. If you just need to do simple ramping then this is a cost effective (free) way. Download the script here:- http://www.lightandtime.co.uk/downloads/exramp.zip

[Doyle4]

the exramp dont seem to work this end... says cant find .xmp's, i placed the file in same directory as images and xmp's and nothing.

ls: *.XMP: No such file or directory
(standard_in) 1: parse error
The path to the sequence is
The total number of .xmp files to process is        0
The total ramp will be
The increment per file will be
(standard_in) 2: parse error
logout

[andyshon]

You need to tell it the path to the folder full of cr2+xmp. For example, if the script is on your desktop, as is a folder called ETTRSequence, and you want to ramp it up by 1.2 stops:

~/Desktop/exramp 1.2 ~/Desktop/ETTRSequence

[Doyle4]

Thanks dude, ill give this a try

Is this a mac terminal code or windows? think this could be the problem also? ahhh ill try n find out lol.

Ahhh its for windows, i tried to run it on mac, finds the folder etc but cant find the xmps.

Doyles-MacBook-Pro:~ doyle$ /Users/doyle/Desktop/Test/exramp 1.2 /Users/doyle/Desktop/Test
ls: *.XMP: No such file or directory
The path to the sequence is /Users/doyle/Desktop/Test
The total number of .xmp files to process is        0
The total ramp will be 1.2
The increment per file will be -1.200000

[andyshon]

I'm on Mac OS 10.8.5. Works for me but I'm no programer. I didn't have the script in the same folder as the files but don't know why that would break it.

[Doyle4]

10.8.5 here too, thanks for the help but still no joy, not sure whats going on either. iv tried it out of the folder and in. odd one.

[Doyle4]

If anyone can understand code could someone explain to me why this code cant find my xmp's?

Code: [Select]

#!/bin/sh
# Script to ramp XMP exposure values
# exramp [total ramp] [path/to/sequence]

ramp=$1
path=$2
cd "$path"
seq_total=$(ls -1 *.XMP| wc -l)
steps=$(expr $seq_total - 1)
inc=$(echo "scale=6; $ramp / $steps" | bc)

echo "The path to the sequence is $path"
echo "The total number of .xmp files to process is $seq_total"
echo "The total ramp will be $ramp"
echo "The increment per file will be $inc"

n=0
gain=$(echo "scale=6; 0 - $inc" | bc)

while [ $n -lt $seq_total ]
do
n=$(expr $n + 1)
gain=$(echo "scale=6; $gain + $inc" | bc)
xmp_file=$(ls -1 *.xmp | sed -n "$n"p)
echo ""
echo "Processing frame $n: $xmp_file"
echo "The gain to be added is $gain"
exiftool -Exposure2012+="$gain" "$xmp_file"
done

my out come.

Code: [Select]

Doyles-MacBook-Pro:~ doyle$ /Users/doyle/Desktop/Test/exramp 1.2 /Users/doyle/Desktop/Test
ls: *.XMP: No such file or directory
The path to the sequence is /Users/doyle/Desktop/Test
The total number of .xmp files to process is        0
The total ramp will be 1.2
The increment per file will be -1.200000

[andyshon]

Try the tweak below and let me know. It's a guess but might work. Think there may also be problems if your xmp files have .xmp as extension rather that .XMP. Not sure how to stop it being case sensitive.

I'll try and make a more robust version that handles errors a bit better, and possibly add an optional third argument to ramp other parameters other than Exposure2012. But I'm learning as I go along so it wont happen quickly.

Code: [Select]

#!/bin/sh
# Script to ramp XMP exposure values
# exramp [total ramp] [path/to/sequence]

ramp=$1
path=$2
cd "$path"
seq_total=$(ls -1 "$path"/*.XMP| wc -l)
steps=$(expr $seq_total - 1)
inc=$(echo "scale=6; $ramp / $steps" | bc)

echo "The path to the sequence is $path"
echo "The total number of .xmp files to process is $seq_total"
echo "The total ramp will be $ramp"
echo "The increment per file will be $inc"

n=0
gain=$(echo "scale=6; 0 - $inc" | bc)

while [ $n -lt $seq_total ]
do
n=$(expr $n + 1)
gain=$(echo "scale=6; $gain + $inc" | bc)
xmp_file=$(ls -1 "$path"/*.XMP | sed -n "$n"p)
echo ""
echo "Processing frame $n: $xmp_file"
echo "The gain to be added is $gain"
exiftool -Exposure2012+="$gain" "$xmp_file"
done


[Doyle4]

Sweet dude!

New code worked and changing xmp to XMP worked, so it is case sensitive, luckily deflicker on dng's produces XMP and not xmp.
Wonder if it can be tweaked to look for xmp and XMP's.

Thanks again man!

also i had to put Doyles-MacBook-Pro:~ doyle$ /Users/doyle/Desktop/test/exramp 1.2 /Users/doyle/Desktop/test to get it too work

[andyshon]

Nice one.

Like I say, I'll get working on a version thats less picky.

[Doyle4]

Cool man, PM me or somin when done n ill grab it for sure.

[Socalboarder]

Hey all, has anyone tried this on a 5D MKII? When I installed ML, on my 5D MKII, the ETTR option is not available under the EXPO menu. Any help would be appreciated . I just stumbled onto this post today, and I am pretty exited to get flicker free time-lapse.

[RenatoPhoto]

You probably should follow this thread to get the RAW features enabled:

14-Bit RAW video Builds for 5D2
http://www.magiclantern.fm/forum/index.php?topic=5533.0

[audunbrekke]

Hi. I have tryed the last ML nightly build on a 6D. I would like to use the ETTR with day to night timelapse, but I cant get it to work properly. I have followed the guide at http://www.magiclantern.fm/forum/index.php?topic=5705.0 If I shoot on and one shot manually it sems to adjust the EV but it ower adjust. It suddenly jumps to 25 or 32 seconds exposure. When using the intervallometer it wont change the exposure at all, and only stays at the same vaules as the first picture. is it some setting I am missing ? Or is the feature not supported by the 6D ?

[RenatoPhoto]

If you have followed the manual and cannot get exposure adjustment with intervalometer action it may be that this feature has not been incorporated to the main builds yet.
but first you should make sure that:

Your camera is on M mode,
In the ETTR module: ETTR is ON, Trigger mode is set to Always On,
In Canon Menu: Image Review is set to at least 2 seconds.

[fcpk]

How does one deal with ETTR in very dark scenes with just a couple very bright objects?
Tried to do a night timelapse last night but there was no way I could bring ETTR under 2, it'd jump to ISO 12800 instantly and push shutter speed to 30"...

EDIT: 5DMkIII, ML nightly from a couple days ago

[RenatoPhoto]

If you want to darken the scene lower the Exposure target to say -2 EV
Found under Advanced ETTR

[audunbrekke]

If you have followed the manual and cannot get exposure adjustment with intervalometer action it may be that this feature has not been incorporated to the main builds yet.
but first you should make sure that:

Your camera is on M mode,
In the ETTR module: ETTR is ON, Trigger mode is set to Always On,
In Canon Menu: Image Review is set to at least 2 seconds.

I have followed the manual, and set these values. it seems to work if I shoot pictures manually on by one. But if I shoot with intervallometer, it never adjusts the exposure. I can see the overlay and the ettr values on the overlay, but it does not change.

Earlyer I have user the intervallometer with sunset on a 550D with great success. Is it possible to get this function as a module for the 6D untill the ETTR is functioning properly ?

[fcpk]

If you want to darken the scene lower the Exposure target to say -2 EV
Found under Advanced ETTR

the problem is that once day rise will come up in my timelapse, then everything will be super dark...(I want a night->day timelapse of a very dark scene with some very bright objects)

[RenatoPhoto]

the problem is that once day rise will come up in my timelapse, then everything will be super dark...(I want a night->day timelapse of a very dark scene with some very bright objects)

According to Alex you have to do that in post.  I think he set Exposure target to -1EV
Ramping of this Exposure target would be useful but Alex says that is not possible. 
Here is an excellent now ramping module for Timelapse:
Intervalometer Ramping Module (adv_int.mo)
http://www.magiclantern.fm/forum/index.php?topic=8431.0

[RenatoPhoto]

I have followed the manual, and set these values. it seems to work if I shoot pictures manually on by one. But if I shoot with intervallometer, it never adjusts the exposure. I can see the overlay and the ettr values on the overlay, but it does not change.

I said earlier:

If you have followed the manual and cannot get exposure adjustment with intervalometer action it may be that this feature has not been incorporated to the main builds yet.

Explore this thread, maybe 1% has enabled this feature in his build:
6D - Install guide and raw shooting.
http://www.magiclantern.fm/forum/index.php?topic=5530.0

The latest build from 1% for 6D is found here:
https://bitbucket.org/OtherOnePercent/tragic-lantern-6d/downloads

[saltador]

Ok.

another confuse newbie here...hope not too confuse  or newbie for you all..hehehe.

i read and read and still have doubts...so i would like to ask.

As other here are asking I also want to do a time lapse from night to day and day to night.

question i still don't grasp..

So, is auto ETTL the substitute for expoRamp?
can i use auto ETTL for night to day and vise versa?
anyone can share setting for this?

for post.

Do i need to use extol or other app or can i just open lightroom?
any one has a explanation for a lightroom workflow?

i'm on mac..with lightroom..Davinci Resolve..FCPX..

thanks so much.

[RenatoPhoto]

So, is auto ETTL the substitute for expoRamp?

Not sure what expo ramp is, but yes anyway.... 

can i use auto ETTL for night to day and vise versa?
anyone can share setting for this?

Yes
Opening post

Do i need to use extol or other app or can i just open lightroom?
any one has a explanation for a lightroom workflow?

Not a mac man.  some one else can help..
See here:
http://www.magiclantern.fm/forum/index.php?topic=6789.msg78647#msg78647

Also read the Opening post for mac xmp workflow

but... I think Lightroom should be able to open the cr2 files and read the exposure adjustment included in the XMP file, even if you are on a mac.