ZV-E10 Setting shutter speed causes erratic behaviour

[TheStaticTurtle]

Camera: ZV-Z10 (USB PTP Class Camera / usb:001,016) libgphoto2 version: 2.5.27 (standard camlibs, gcc, ltdl, EXIF) libgphoto2_port version: 0.12.0 (iolibs: disk ptpip serial usb1 usbdiskdirect usbscsi, gcc, ltdl, EXIF, USB, serial without locking)

I'm trying to set the shutter speed of my ZV-E10 with libgphoto2, but I'm facing a very weired issue.

Regardless of what I set it to with gp_widget_set_value, once I apply it with gp_camera_set_config the shutter speed is almost completely random. For example, I may set it to 1/1000 and the camera will report 1/640 or 1/4000 or anything really. After querying the config & widget again, libghoto2 also reports the "wrong" one. The only time it seems not to crap the bed is when I set it to a value that it's already at (for example, setting it to 1/500 will not set it to something else if the camera is already at 1/500)

I also need to add that this does not affect the f-number widget (didn't try any others yet). And that setting the shutter speed seems to work correctly in the command line (However, if I spam it fast enough I can see some wired behaviour).

I've noticed with sudo gphoto2 --list-config and reading some code that there are two /main/capturesettings/shutterspeed. Here is the output of gphoto2 --list-all-config --debug: https://termbin.com/90dep where there is two shutter speed (0xd229 and 0xd20d)

My program is much more complicated, but the issue boils down to the following code.

void set_shutter_speed (Camera *camera, GPContext *context, std::string val) {
    int retval;
    CameraWidget *root;
    CameraWidget *widget;
    
    retval = gp_camera_get_config(camera, &root, context);
    printf("gp_camera_get_config: %d\n", retval);
    
    retval = gp_widget_get_child_by_name (root, "shutterspeed", &widget);
    printf("gp_widget_get_child_by_id: %d\n", retval);
    
    const char* test = "1/1000"; //val.c_str();
    printf("%s\n",test);
    retval = gp_widget_set_value(widget, test);
    printf("gp_widget_set_value: %d\n", retval);
    
    retval = gp_camera_set_config(camera, root, context);
    printf("gp_camera_set_config: %d\n", retval);
    
    gp_widget_free (root);
}

Camera & context are initialized somewhere else like this:

Camera	*usb_camera;
GPContext *usb_camera_context;

usb_camera_context = gp_context_new();
gp_context_set_error_func(usb_camera_context, gphoto_ctx_error_func, NULL);
gp_context_set_status_func(usb_camera_context, gphoto_ctx_status_func, NULL);
gp_camera_new(&usb_camera);

int gpret = gp_camera_init(usb_camera, usb_camera_context);
if (gpret != GP_OK) {
    spdlog::get("gphoto2")->error("Failed to init: {}", gpret);
    return -4;
}

Anyone knows what the hell might be going on?

[ioannismihailidis]

Have you found a solution?

Maybe this is related to #775 . There are also two /main/capturesettings/shutterspeed and a strange behavior when changing it.

[msmeissn]

can you first update to 2.5.30, we did various fixes to Sony config handling in between.

do you have a debugtrace with the commandline tool?