MultiCam not working with 1.11.x anymore (str vs. object)

NODeeJay · May 16, 2025, 11:30am

With the recent update in OctoPrint to correctly process the webcam identifier as string instead of webcam object, breaks MultiCam's snapshot function.
I filed a report in mikedmor's repo 'str' object has no attribute 'config' with latest OctoPrint 1.11.x · Issue #77 · mikedmor/OctoPrint_MultiCam · GitHub but I also found the author is for good reasons (life, the best reason ) not much active anymore/at the moment.

I am not into python, but I think the issue is in line 129 OctoPrint_MultiCam/octoprint_multicam/__init__.py at 64d212000cf60db2b738a84fba60bd8d4367572b · mikedmor/OctoPrint_MultiCam · GitHub where the webcam object is created.

Any idea how to fix that?

jneilliii · May 17, 2025, 1:14pm

I had the same issue with go2rtc plugin, need to make sure that displayName=name is forced as string. Quick fix would be to wrap name in str function.

displayName=str(name)

jneilliii · May 17, 2025, 1:50pm

Actually, that is a different error. Looking back a pr was merged from me for this issue, but some reason may not have completely fixed it. Comparing to go2rtc plugin it may be this line.

github.com

jneilliii/OctoPrint-go2rtc/blob/384bdf2dce3e5fb9d3cd883e1544110e9ddde647/octoprint_go2rtc/init.py#L186


      
                  self._logger.debug(f"Webcam: {webcam}")
                  return webcam
          
              return [profile_to_webcam(stream_key) for stream_key in streams if str(stream_key) not in self._settings.get(["disabled_streams"])]
          
          def lookup_webcam(self, webcam_name):
              webcam_configs = self.get_webcam_configurations()
              return [webcam_config for webcam_config in webcam_configs if webcam_config.name == webcam_name]
          
          def take_webcam_snapshot(self, provided_webcam):
              webcam = None
              if isinstance(provided_webcam, str):
                  webcam_lookup = self.lookup_webcam(provided_webcam)
                  if len(webcam_lookup) > 0:
                      webcam = webcam_lookup[0]
              else:
                  webcam = provided_webcam.config
          
              if webcam is None:
                  raise WebcamNotAbleToTakeSnapshotException("provided_webcam is None")

jneilliii · May 17, 2025, 8:57pm

@NODeeJay did you have multicam plugin installed prior to Feb 4th 2025? If so, the changes were merged then that fixes the string issue, but the maintainer never published a release with the changes in version 0.4.3, and 0.4.2 is the only one showing. You can force the install by copying/pasting this URL in plugin manager > get more > ...from URL to force the upgrade.

https://github.com/mikedmor/OctoPrint_MultiCam/archive/refs/heads/master.zip