Using USB API (MTP) with libghoto2 and Python bindings on MacOS, Raspberry Pi, Linux, ROS

API Usage
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27

  1. I left out the explanation, but huga.py is @mhenrie 's program.

  2. I was just wondering if installing gvfs-dbg would save me from having to uninstall gvfs-backs, but I haven’t tried that in this raspberry-pi environment.
    “gvfs-dbg was not installed in the production development environment where gvfs-mount -u {path}” was available.
    Instead, gvfs, gvfs-bin, gvfs-daemon, gvfs-fuse, and gvfs-lib(:arm64) were installed.
    Any of these have “gvfs-mount -u {path}” available, and that’s what’s important.
    You can unmount them by looking up bus,dev in Theta and typing
    gvfs-mount -u /run/user/1000/gvfs/mtp:host=%5B{bus}%2C{dev}%5D.
    Note that the string after “host=” means the URL encoded string of [{bus}:{dev}].
    Just for reference.
    I don’t know which gvfs* can do this, but I think you should include them all for now.
    (That’s an irresponsible statement.)

  3. gvfs-backends Just uninstalling it was enough.

  4. If you have a fast enough internet connection and a working environment that doesn’t put too much strain on your raspberry-pi, you’ll be set up in no time. Because all you have to do is sudo apt install libgphoto2 and pip install gphoto2.
    I just uninstall gvfs-backends if needed.
    I haven’t tried building from git sources yet. Because I haven’t been able to find a reason for the current event that the point at which the error occurs has changed.
    If I can ignore it, I’ll move on to the second experiment.

I’m not sure about Vendor IDs or Product IDs yet, but list-files.py does work with the error. Doesn’t theta there shoot anything? Or did you just omit the display and it showed up correctly?
Examples of my results

WARNING: gphoto2: (foreach_func [gphoto2-port-info-list.c:237]) Error during assembling of port list: 'Unspecified error' (-1).
WARNING: gphoto2: (gp_port_set_error [gphoto2-port.c:1186]) The supplied vendor or product id (0x0,0x0) is not valid.
File list
=========
/store_00020001/DCIM/100RICOH/R0010132.MP4
/store_00020001/DCIM/100RICOH/R0010133.MP4
/store_00020001/DCIM/100RICOH/R0010134.MP4
/store_00020001/DCIM/100RICOH/R0010135.MP4
/store_00020001/DCIM/100RICOH/R0010136.JPG
/store_00020001/DCIM/100RICOH/R0010137.MP4
/store_00020001/DCIM/100RICOH/R0010138.MP4
...
/store_00020001/DCIM/100RICOH/R0010132.MP4
/store_00020001/DCIM/100RICOH/R0010133.MP4
/store_00020001/DCIM/100RICOH/R0010134.MP4
/store_00020001/DCIM/100RICOH/R0010135.MP4
/store_00020001/DCIM/100RICOH/R0010136.JPG
/store_00020001/DCIM/100RICOH/R0010137.MP4
/store_00020001/DCIM/100RICOH/R0010138.MP4
File info
=========
image dimensions: 1920 960
image type: video/mp4
file mtime: 2020-09-02 19:55:11
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