Hello,
I had the same error with gphoto2 installed from apt. The fix is working but you need to modify and recompile libgphoto2.
It will be nice if you make a pull request. Before that if someone could check the VendorID on others Theta cameras in order to make the correction for all the theta models.
Hugues
Thank you for all your work and insight.
Iāll also try and help test this. Thereās been a new surge in interest in the USB API, possibly driven by the increased demand for virtual surveillance.
BTW, if anyone with a good business opportunity is looking to partner with a company with experience in the USB API and streaming, please check out the article on FOX Sewer Rover and consider contacting Hugues with a great business opportunity. 
Note the followup posts covering his modifications.
@Hugues is the VendorID, the same as the VendorExtensionID?
From the MTP Specification.
If so, I can run it against the cameras I have. I believe the extension ID is 0x00000006 on all of them, but I can check. In the libptp source code, this ID is assigned to Microsoft.
Camera information
==================
Model: RICOH THETA Z1
manufacturer: Ricoh Company, Ltd.
serial number: '10010104'
device version: 1.50.1
extension ID: 0x00000006
extension description: (null)
extension version: 0x006e
Camera information
==================
Model: RICOH THETA V
manufacturer: Ricoh Company, Ltd.
serial number: '00105377'
device version: 3.40.1
extension ID: 0x00000006
extension description: (null)
extension version: 0x006e
This is the same as the SC2. The firmware number is different, but everything else should be the same for our purposes.
Camera information
==================
Model: RICOH THETA SC2
manufacturer: Ricoh Company, Ltd.
serial number: '40100146'
device version: 06.12
extension ID: 0x00000006
extension description: (null)
extension version: 0x006e
@NaokiSato102, I have not looked into the GitHub pull request. Please proceed with your testing and I can try and support your efforts. To do a pull request, youāll need to fork the project first and do the modification, then test the modifications, then do the pull request.
My status:
My plan:
I couldnāt get it to work with the lib I installed with apt, either. (summarized)
Thank you @Hugues for checking the behavior.
Iām going to try the following on Raspberry Pi 3B+ before I try it in the production development environment.
And if 2 and 3 go well, Iāll try it out in the production development environment.
Iāll make the transition between 1 and 2 by backing up the disk image.
Maybe the problem is that the lib that can be installed with apt is not updated to the latest version of git yet, and it works fine if you install it from the git source.
So Iām going to change the process to the following
@mhenrie 's program on Ras-pi
What ?! Of course I installed libgphoto2 and PygPhoto2.
Traceback (most recent call last):
File āhuga.pyā, line 13, in
import gphoto2 as gp
ImportError: No module named gphoto2
Probably because of the lack of a path. Iām too sleepy to come up with a solution.
I installed gPhoto2 in pip, which is pip3 and works fine in Python3.
However, I didnāt install it in pip2, so it didnāt work in Python2.
The un-numbered Python in raspberry pi refers to 2, so thatās why it didnāt work.
What a rudimentary error.
Also, after resolving this, I had the usual mount-related errors, and since this is a CUI environment and I couldnāt use the sequential unmounting method by gvfs-mount, which I often use in my environment, I solved it by removing gvfs-backends and got it running.
The conclusion is that the first experiment failed as expected.
According to this article, the reason why gvfs-mount is not available can be solved by apt install gvfs-dbg.
However, when I looked closely, I saw an error in a different area. The error occurred one step or line later than last time.
Traceback (most recent call last):
File āhuga.pyā, line 234, in
_unittest()
File āhuga.pyā, line 210, in _unittest
camera.init()
File āhuga.pyā, line 118, in init
fstop = self.other_config.get_child_by_name(F_NUMBER)
gphoto2.GPhoto2Error: [-2] Bad parameters
Thank you for all this great information.
huga.py available somewhere so that we can test the same file?gvfs-dbg. I am not familiar with this and would like to solve the problems Iām having when I use gvfs automount and libptp2 at the same time. Did you uninstall gvfs-backends and then install gvfs-dbg?gvfs packages that can be installed with apt?My status
I decided to remove gphoto2 from my x86 i7 system and install things from source.
$ df |grep gphoto2
/dev/loop18 16512 16512 0 100% /snap/gphoto2/8
$ snap remove gphoto2
gphoto2 removed
$ sudo apt remove libgphoto2-dev
In the newest version of libphoto2 from github, modified the code per hugues post.
$ make
$ sudo make install
No problems.
I installed gphoto2 from source.
$ gphoto2 --version
gphoto2 2.5.23.1
...
This version of gphoto2 is using the following software versions and options:
gphoto2 2.5.23.1 gcc, popt(m), exif, no cdk, no aa, no jpeg, no readline
libgphoto2 2.5.25 standard camlibs (SKIPPING lumix), gcc, ltdl, EXIF
libgphoto2_port 0.12.0 iolibs: disk ptpip serial usb1 usbdiskdirect usbscsi, gcc, ltdl, EXIF, USB, serial without locking
$ which gphoto2
/usr/local/bin/gphoto2
Tests
$ gphoto2 --list-cameras |grep 'Ricoh Theta'
"Ricoh Theta (WLAN)" (TESTING)
"Ricoh Theta m15 (PTP mode)"
"Ricoh Theta S (PTP mode)"
"Ricoh Theta SC (PTP mode)"
$ gphoto2 --get-config shutterspeed
Label: Shutter Speed
Readonly: 0
Type: RADIO
Current: Auto
Choice: 0 Auto
END
$ gphoto2 --set-config=/main/other/500e=4
Label: Shutter Speed
Readonly: 0
Type: RADIO
Current: 1/60
Choice: 0 1/25000
Choice: 1 1/20000
Choice: 2 1/16000
Choice: 3 1/12500
Choice: 4 1/10000
Choice: 5 1/8000
Choice: 6 1/6400
Choice: 7 1/5000
Choice: 8 1/4000
Choice: 9 1/3200
Choice: 10 1/2500
...
$ gphoto2 --set-config=/main/other/500e=2
$ gphoto2 --get-config shutterspeed
Label: Shutter Speed
Readonly: 0
Type: RADIO
Current: Auto
Choice: 0 Auto
Iām not sure how it pulls the vendor and product id.
$ python list_files.py
WARNING: gphoto2: (gp_port_set_error [gphoto2-port.c:1190]) The supplied vendor or product id (0x0,0x0) is not valid.
I can get the port and device from gphoto2 --autodetect
$ gphoto2 --auto-detect
Model Port
----------------------------------------------------------
USB PTP Class Camera usb:005,003
However, the python library is showing 0x0, 0x0
$ gphoto2 --summary
Camera summary:
Manufacturer: Ricoh Company, Ltd.
Model: RICOH THETA Z1
Version: 1.50.1
Serial Number: 10010104
Vendor Extension ID: 0x6 (1.10)
I left out the explanation, but huga.py is @mhenrie 's program.
I was just wondering if installing gvfs-dbg would save me from having to uninstall gvfs-backs, but I havenāt tried that in this raspberry-pi environment.
āgvfs-dbg was not installed in the production development environment where gvfs-mount -u {path}ā was available.
Instead, gvfs, gvfs-bin, gvfs-daemon, gvfs-fuse, and gvfs-lib(:arm64) were installed.
Any of these have āgvfs-mount -u {path}ā available, and thatās whatās 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 āhost=ā means the URL encoded string of [{bus}:{dev}].
Just for reference.
I donāt know which gvfs* can do this, but I think you should include them all for now.
(Thatās an irresponsible statement.)
gvfs-backends Just uninstalling it was enough.
If you have a fast enough internet connection and a working environment that doesnāt put too much strain on your raspberry-pi, youāll 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 havenāt tried building from git sources yet. Because I havenāt 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, Iāll move on to the second experiment.
Iām not sure about Vendor IDs or Product IDs yet, but list-files.py does work with the error. Doesnāt 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 19:55:11If you have time, Iād appreciate it if you could reply to me.
Hi, sorry for the delay. I was trying to get more progress before I updated the group here. Unfortunately, I still donāt have libgphoto2 working properly with Python bindings.
Currently, list-files.py does work for me, but I get the same WARNING at the top as you. I would like to eliminate the warning. The output does work, but it is not satisfying.
When I used mhenrieās program, I have a different error. I get the āUnable to copy DNGā error raised by this section.
gp_dng_path = wait_for_event(self.camera, timeout=TIMEOUT_CAPTURE_DNG, event_type=gp.GP_EVENT_FILE_ADDED)
if not gp_dng_path:
raise RuntimeError('Unable to copy DNG')
Thus, the command line program gphoto2 works for me, but the Python bindings in libgphoto2 do not work.
At the moment, I am using ptpcam from libptp2 inside of programs by running running a shell process inside of my program. As the API commands are not time sensitive, this seems to work, but is not satisfying.
The C functions inside of libptp are not that friendly to use, so I would like to use libghoto2, but Iām not sure if the full library of API commands work with the THETA.
I believe the best path forward is to use mhenrieās program and modify the _unittest to test less features first, then apply a debugger and see what is happening to the variable dng_path
I just thought that maybe you hadnāt noticed. Iām sorry if I rushed you.
I have been wondering for a long time if it is possible to fix the error at the time of video shooting by modifying the source code of libgPhoto2.
@Hugues has suggested the possibility of resolving the error by modifying the source.
Could it be possible to fix the problem as well, so that gphoto2 --set-config movie=0 does not stop video recording?
I think I can do it.
But I canāt write it because I donāt know what the source code is, but itās too big for me.
I should be able to figure it out by myself sooner or later.
Is it naive to wait for someone to solve the problem?
Aside from that, I had a similar error when using @mhenrieās program.
When I saw that error, I took a peek at the shutter speed and exposure time settings that werenāt working properly and made them work.
We have many options.
Keep trying the libgPhoto2 system
We will continue to use the python-gphoto2 system, which converts C code by SWIG, with analysis and improvement.
Use gphoto2-cffi, which is converted by cffi
I believe operational testing is not yet available on this forum. git, pypi
Another use of piggyphoto to convert with another ctype
āThis is a very rough proof of concept. feel free to play with it and add improvements.ā
so you might not expect it to work very well. git
Try the Python binding in linptp2
I canāt find anything useful here, according to my research.
I found a hit on git, but itās not available on Linux because they donāt know how to compile it as a shared library.
Does anyone know how to use it?
By the way, Iām going to move on to the next phase of operational testing.
I have the same problem with libgphoto2. It is a big project. I have a difficult time understanding it.
I do not think anyone else will solve the problem. It may be up to you if you want the challenge. 
John Thomas was looking at GitHub - Parrot-Developers/sequoia-ptpy: Python library used to communicate with PTP devices like Parrot Sequoia
The last I checked, he did not have it working around 3 weeks ago. Maybe it is working now?
I understand that it is better to have working Python bindings when using ROS on Linux. However, I think that people can run shell process if they need to as a workaround.
In the discussion of that GitHub issue, you may notice a reference to a RICOH USB SDK. Note that SDK is not the SDK for the RICOH THETA. It is for other RICOH cameras.
I donāt know if it will be usefull for you but to stop the video recording Iām using the command
gphoto2 --set-config=/main/actions/opcode=0x1018,0xFFFFFFFF
Hugues
Iām surprised thereās such a solution! But unfortunately, it didnāt work in my environment.
My environment is as below.
ā»gPhoto2 related items are all unmodified
gphoto2 --set-config=/main/actions/opcode=0x1018,0xFFFFFFFF
*** Error ***
The /main/actions/opcode widget is not configurable.
*** Error (-2: āBad parametersā) ***For debugging messages, please use the --debug option.
Debugging messages may help finding a solution to your problem.
If you intend to send any error or debug messages to the gphoto
developer mailing list gphoto-devel@lists.sourceforge.net, please run
gphoto2 as follows:env LANG=C gphoto2 --debug --debug-logfile=my-logfile.txt --set-config=/main/actions/opcode=0x1018,0xFFFFFFFFPlease make sure there is sufficient quoting around the arguments.
First, thanks to @Hugues for providing this fix. Amazing that you could figure it out! I canāt even find the documentation for --set-config=/main/actions/opcode=
Second, for @NaokiSato102, the solution works for me. I believe that maybe you are not starting the video or your THETA is mounted as a file system?
Here is my complete test
If the camera is mounted, the commands may not work.
Using the API reference, we can see that video mode is hex 0x8002 or 32770 in base 10.
$ gphoto2 --set-config=5013=32770
$ gphoto2 --set-config movie=1
$ gphoto2 --set-config=/main/actions/opcode=0x1018,0xFFFFFFFF
$ gphoto2 --set-config movie=1 --wait-event=2s --set-config movie=0
There is a beep after each command and no errors on the console.
If you mount the camera again, you can see the media.
In my test, I have intentionally disabled internal stitching.
I suspect that your camera may be auto-mounting. Please check it and report back.
I have added this test to the USB API documentation on the Linux streaming documentation I am building. Iām providing attribution to Hugues by linking to his profile on this site along with his ID on this site.
(Missed stringing the replies together.)
I have firmly unmounted Theta and started recording and then tried it.
I would appreciate it if you all could tell me the results of your tests with information on your experimental environment.
Is it interference from other applications etc.? I do not know the reason.
Iām going to try it in the raspberry-pi environment as well.
The fact that the stop command works with --set-config suggests that it can work with the corresponding code in Python-gPhoto2. I canāt think of any code at the moment, but I think I can convert @mhenrieās code to suit.
Also, was āgphoto2 --set-config movie=1 --wait-event=2s --set-config movie=0ā able to exit after the shooting started successfully in @craigās environment? This should have been inoperative in my perception, i.e. it was not possible to stop shooting.
RICOH THETA Z1 with firmware 1.50.1
craig@cube:~$ lsb_release -a
LSB Version: core-11.1.0ubuntu2-noarch:security-11.1.0ubuntu2-noarch
Distributor ID: Ubuntu
Description: Ubuntu 20.04.1 LTS
Release: 20.04
Codename: focal
craig@cube:~$
craig@cube:~$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 60
model name : Intel(R) Pentium(R) CPU G3258 @ 3.20GHz
craig@cube:~$ gphoto2 --version
gphoto2 2.5.23
This version of gphoto2 is using the following software versions and options:
gphoto2 2.5.23 gcc, popt(m), exif, cdk, aa, jpeg, readline
libgphoto2 2.5.25 standard camlibs (SKIPPING lumix), gcc, ltdl, EXIF
libgphoto2_port 0.12.0 iolibs: disk ptpip serial usb1 usbdiskdirect usbscsi, gcc, ltdl, EXIF, USB, serial without locking
It worked in my test. The correct video was saved to file. Note that the camera was in video mode at the start of the sequence.
Host system is the same as described above.
Camera is
$ gphoto2 --summary
Camera summary:
Manufacturer: Ricoh Company, Ltd.
Model: RICOH THETA V
Version: 3.40.1
Serial Number: 00105377
Vendor Extension ID: 0x6 (1.10)
craig@cube:~$ gphoto2 --set-config movie=1
craig@cube:~$ gphoto2 --set-config=/main/actions/opcode=0x1018,0xFFFFFFFF
craig@cube:~$
Result: successful
craig@cube:~$ gphoto2 --set-config movie=1 --wait-event=2s --set-config movie=0
Result: successful
Itās interesting that there are different versions of gphoto2. It may be derived from that.
I CAN NOT get gphoto2 2.5.23 by apt install.
What should I do?
When I installed gPhoto2 using gPhoto2-updater after removing an existing apt-derived gPhoto2 with reference to this article, I was able to execute the commands which @craig presented and the configuration of gPhoto2 became the same.
It seems to be better to use gPhoto2-updater than to install it with apt.
But I wonder why gPhoto2-updater has not been updated. I wonder why we have to separate gPhoto2-updater and apt.
As usual, āgphoto2 --set-config-index shutterspeed=10ā did not work properly, but the error message changed.
Previously.
*** Error (-110: 'I/O in progress') ***
Present.
*** Error ***
Shutterspeed not found in configuration tree.
*** Error (-1: 'Unspecified error') ***[quote=āNaokiSato102, post:39, topic:4521, full:trueā]
I CAN NOT get gphoto2 2.5.23 by apt ins[/quote]