scj643 / gphoto-live-threading

Live gphoto with the ability to change camera settings

gphoto-threading

This python script allows you to provide v4l2loopback, or other applications, with frames from a DSLR. Unlike other options, this script allows you to send commands to your camera while capturing preview frames. This lets you, for example, adjust the ISO and control focus.

Windows

For windows to work you have to install libgphoto2 using msys2. Then replace the driver with Win-USB using Zadig (I have tested this with my D5600 and without it, you won't be able to access the camera.)

mpv playback

To play with mpv --demuxer-lavf-probescore=10 must be used since the stream has no timestamps. For low latency add --no-cache --untimed --demuxer-thread=no --vd-lavc-threads=1 --no-audio

--demuxer-thread=no must be used otherwise mpv will be buffering a lot, and the output will be choppy.

This can use a lot of CPU without hardware decoding. On my i7 9700k on Windows 10, it hits 25% utilization sometimes.

Example

mpv --no-cache --untimed --no-demuxer-thread --vd-lavc-threads=1 --demuxer-lavf-probescore=10 --no-border --no-audio udp://127.0.0.1:8833

Hardware Decoding

For mpv to do hardware decoding add --hwdec-codecs=mjpeg This may or may not cause issues for you. On my i7 9700k on Windows 10 with an RTX 2080 SUPER it significantly reduces CPU usage with little noticeable latency.

gphoto-live-threading's Issues

Changing F-Stop doesn't actually work

This is an issue with how F-Stop is handled at least on the D5600.
It can not be changed while the shutter is up.
A work around needs to be made to lower the shutter manually.