CHDK Forum
Using CHDK => General Help and Assistance on using CHDK stable releases => Topic started by: Jeffffff on 18 / August / 2009, 15:07:35
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I'm new to CHDK, and find it a bit overwhelming. I'm looking to do a couple of rather simple things, but can't figure out if CHDK will do this "as-is" or if I need a script.
I want to shoot a series of bracketed shots altering the shutter speed by a specific +/- EV setting between each shot for use in compiling an HDR image. The Canon firmware will only do 3 shots, normal exposure, 1 plus, and 1 minus shot at some EV (1/3 to 2). I want to do 5, 7, 9, or more shots at +/- "x"EV (7 would be 1 normal, and 3 over, 3 under). Do I need a script for this, or can CHDK do it as is? If so, please list the steps and menu entries to alter. I would also be nice if the 2 second self time could be triggered before the first shot so there is no camera shake on the first image from pressing the button.
If this requires a script, once I saw a script that does this I could probably figure out the rest.
Thanks in advance.
Jeff
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No problem.
Read all of this page http://stereo.jpn.org/eng/sdm/capture.htm (http://stereo.jpn.org/eng/sdm/capture.htm)
No script needed.
David
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David, I'm afraid this is just as confusing. The page talks about menu items that don't exist.
Still need help.
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Go to this page http://stereo.jpn.org/eng/sdm/index.htm (http://stereo.jpn.org/eng/sdm/index.htm) and further down you will see all the DISKBOOT.BIN versions for various cameras.
Assuming that you have a bootable card, replace existing DISKBOOT.BIN with downloaded version.
If you wish to try other features, such as time-lapse, download Common_files.zip from the same page.
David
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@Jeffffff
In the case you want to do it with CHDK instead of using the Stereo Data Maker (SDM):
Scriptless Tv bracketing (http://chdk.setepontos.com/index.php/topic,2143.msg19864.html#msg19864)
SD990 guidance (http://chdk.setepontos.com/index.php/topic,2972.msg37704.html#msg37704)
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@fe50
Great! That works. The maximum number of shots on custom timer is 10, but since HDR sequences use odd vales, 9 shots is the max. I doubt I'll need more than 9. That gives me the primary exposure, with 4 overs and 4 unders. With the Canon firmware is was only 1 over 1 under (3 total).
I'll probably take a peek at that SDM build too out of curiosity.
Thank you everyone.
OK, Next...
I want to dabble with time lapse. The camera has a built in time lapse, but only 1 or 2 seconds between shots. I keep seeing reference to an "Intervalometer". I assume this is a script that allows a more custom control of time settings so I can go above 2 seconds per shot. Is this a script, or built into CHDK? Also, does this create an AVI or movie file, or just take picture files that must be rendered into a movie file? (I saw reference to a program called SUPER that can do this?)
J
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Is this a script, or built into CHDK?
A script
Actually there are plenty of them around, going from the simplest to the most complex ones
Basically, this is a simple intervalometer:
@title Intervalometer
@param a delay between shots (sec)
@default a 1
let s=a*1000
:loop
shoot
sleep s
goto "loop"
This is a complex one:
http://chdk.wikia.com/wiki/UBASIC/Scripts:_Ultra_Intervalometer (http://chdk.wikia.com/wiki/UBASIC/Scripts:_Ultra_Intervalometer)
In both cases, save the code in a file called interval.bas or similar and put it into the CHDK/SCRIPTS folder
Scripts can be written in ubasic or lua, two different languages (SDM only supports uBasic)
further reading for ubasic
http://chdk.wikia.com/wiki/UBASIC/TutorialScratchpad (http://chdk.wikia.com/wiki/UBASIC/TutorialScratchpad)
http://images2.wikia.nocookie.net/chdk/images/6/6d/UBASIC_User_Guide_D0_4.pdf (http://images2.wikia.nocookie.net/chdk/images/6/6d/UBASIC_User_Guide_D0_4.pdf)
and for LUA:
http://chdk.wikia.com/wiki/LUA (http://chdk.wikia.com/wiki/LUA)
Also, does this create an AVI or movie file, or just take picture files that must be rendered into a movie file?
you get pictures that must be assembled.
Virtualdub is a program commonly used for this.
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@fbonomi:
Thanks. I looked at the "complex" script, and loaded it into the camera. Works as advertised. I'm kind of amazed, not that this works, but the capability and programability.
I already tried modifying the script to tailor it slightly.
I notice my G9 has a shot cycle time of about 3 seconds. Anyone know how I can lessen this shot-to-shot time? The way it is, setting an interval of one second causes a actual shot-to-shot time of about 4 seconds.
It would seem I can use the camera itself for 1 or 2 second time lapse, and the script for 4+ seconds. Not that this matters, it's all part of the learning process.
For time lapse, should I be using the 640x480 mode for images, or use the 12mp sized images? (note: shot-to-shot time the same for either 640 or 12mp).
Anyone care to chime in on how to use virtualdub to render the movie? The basic steps, so I can get an output movie.
Thanks
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There are plenty of links for using VirtualDub with image sequences.
Make sure you get a later version that supports image sequence in File\Open video File
(click the 'Files of type' drop-down menu).
Save as an AVI file using XVid codec, for example.
Someone has taken images with SDM at a faster rate than you mention, not sure about CHDK.
David
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There are plenty of links for using VirtualDub with image sequences.
Make sure you get a later version that supports image sequence in File\Open video File
(click the 'Files of type' drop-down menu).
Save as an AVI file using XVid codec, for example.
Can you point me to some links on using Virtualdub in this manner?
Thanks
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@Jeffffff
..searching for virtualdub + timelapse (http://www.google.de/search?q=virtualdub+timelapse) would help :)
[noembed]vimeo.com/1697041[/vimeo]]Video Tutorial, how to make Time Lapse with VirtualDub (http://www.[vimeo)[/noembed]
If you want to use the build-in Canon time lapse feature:
With CHDK you can set the time value to whatever you want with a little script, there's no more 1/2s limit...have a look to my wikia user page:
unleash Canon TL (Digic III) (http://chdk.wikia.com/wiki/User:Fe50#unleash_Canon_TL_.28Digic_III.29)...