støkkva skjaldbaka translates to "Snapping Turtle" in Old Norse, or at least Icelandic (which is apparently similar)
"Snap" because the program triggers the camera to snap photos
"Turtle" because timelapses are slow and take a lot of time
Capture an image and transfer -> Measure brightness -> Adjust settings -> Capture another image -> repeat
- The X-T1 bult-in intervalometer is limited to 999 shots
- You don't want to buy a bigger memory card
- You don't want to buy an expensive intervalometer
- There is no info on the interface when shooting timelapses, so you can't see your exposure meter or histogram and adjust accurately
- Conditions are changing during the shoot
- You want to ramp day-to-night/holy grail
- Python 3.x
- gphoto2
- exiftool
- ImageMagick (v7.x recommended)
- USB cable
- Change the USB mode to "PC SHOOT AUTO" or "PC SHOOT FIXED" (Recommended)
- Shutter Dial in "T" position
$ python stokkva.py
støkkva skjaldbaka started
$ ps aux | grep gphoto
$ kill -9 {pid of gvfs-gphoto2-volume-monitor}
or
$ sudo chmod -x /usr/lib/gvfs/gvfs-gphoto2-volume-monitor
$ sudo chmod -x /usr/lib/gvfs/gvfsd-gphoto2
You probably need to power cycle the camera after fixing these problems
The "PC SHOOT FIXED" USB option in the X-T1 says it will not save to the memory card, but it still does. Take out the memory card if you don't want it to fill up or be the limitation of your duration. Might also speed up the process, since it isn't trying to write data twice.
Make sure your "AUTO POWER OFF" settings is set to "OFF", or at least longer than the interval time.
Sometimes the camera refuses to shut off while still plugged in to USB.
Based on https://github.com/dps/rpi-timelapse
I did not fork his project because it is more complicated than I needed and it is based on python2.
- ISO ramping - Doesn't respond to the --set-config command
- Better shutter speed handling logic/math
- _preview.jpg clean up
- Histogram based luminance measurement