Crash after toggling video movie recording mode using gphoto command line, C++, or Python wrapper

[hytel]

I'm creating an app that is commanding a Sony A7RIII extensively. Nearly everything works. However, I do want to start/stop recording a video at one point, and no matter how I code it, I get a crash. To be clear, it DOES toggle the recording correctly, but crashes in the gp_camera_set_config. This means my application exits before performing other tasks. Of all the the examples I see online, there are actually very few that I see that toggle on/off video recording (lots for preview or still capture though!). This even happens in gphoto2 on the command line simply with:

gphoto2 --set-config movie=1

which does the task but gives:

Segmentation fault (core dumped)

A simple C++ program showing the same thing:

#include <stdio.h>

#include <gphoto2/gphoto2-camera.h>

#define CHECK(f) {int res = f; if (res < 0) {printf ("ERROR: %s\n", gp_result_as_string (res)); return (1);}}

int main() {

Camera *camera;
CameraWidget *root_widget;
GPContext *context;
CameraWidget *movie_child;

CHECK (gp_camera_new (&camera));
int ret = gp_camera_get_config (camera, &root_widget, context);
printf("%d\n", ret);

ret = gp_widget_get_child_by_name(root_widget, "movie", &movie_child);
printf("Child by Name: %d\n", ret);

int val = 1;

ret = gp_widget_set_value(movie_child, &val);
printf("Set Value: %d\n", ret);

ret = gp_camera_set_config(camera, root_widget, context);
printf("Set Config: %d\n", ret);

ret = gp_camera_exit(camera, context);
printf("Exit: %d\n", ret);

return 0;
}

Name the camera
Model Port

Sony Alpha-A7r III (PC Control) usb:001,018

libgphoto2 and gphoto2 version
This version of gphoto2 is using the following software versions and options:
gphoto2 2.5.28 gcc, popt(m), exif, cdk, aa, jpeg, readline
libgphoto2 2.5.31 standard camlibs, gcc, no ltdl, EXIF
libgphoto2_port 0.12.2 iolibs: disk ptpip serial usb1 usbdiskdirect usbscsi, gcc, no ltdl, EXIF, USB, serial without locking

To Reproduce
Same crash on the command line as above with gphoto2, or with the C++ code above, or even using the python wrapper. It's a pity because is this is the LAST function I need for my controlling app :-(

Any ideas?