![]() ![]() Its selection of attributes is narrow but aimed to add in its usefulness and simplicity. It is designed initially for amateur artists, and so it focuses on offering features for originating simple 3D scenes. This all assumed Linux.Cheetah3D is a 3D software for modeling, rendering, and animation. Then the user robot program doesn’t have to change if the path changes. A nice name should be kept as part of the camera configuration to use for transmitting data. I’ll add that the ByPath name is ugly and I don’t want to see that as the camera name in Network Tables keys and thus in my robot program. For example, if I decide (accidentally or on purpose) to change the RPi port for a camera or if I decide to change USB hubs and ports then there is a new ByPath for me to have to manage in the camera program be it PV or WPILIBPI, etc. I do recognize that ByPath isn’t the perfect solution although it may be ideal. Who knows what other kinds of cameras may be capable of? They start up usually with some mode configuration failure (nothing but speckles) that require unplugging and re-plugging in to show the image correctly. There is a possibility that Logitech cameras can be renamed but they don’t get along with Linux. I have no idea how to or if it’s even possible to rename a LIfeCam. I couldn’t swap out a failed camera instantly since (half the time) I’d have to rename the camera before use. The ArduCam utility works to rename a camera so that isn’t a problem except I don’t like the idea of being held hostage to mystery software that I have to run before I can use two identical cameras in PV. I don’t know PV or OS internals in order for me to predict if two cameras are always presented to PV in the same order and PV always renames the same camera in the order presented to it.įrom my experience using WPILIBPI the only method I know to assure infallible identification of a particular camera that has the same name as another camera is to use the ByPath assigned by the Linux OS. (A PV session command - SWAP CAMERAS - could be provided but that’s not a very good solution as it challenges the user to determine if the cameras are swapped at an inopportune time.) My concern (repeating it) is what if PV renames the other camera of a pair in a different PV session? Then the wrong saved camera configurations would be used. PhotonVision renames one of two duplicate cameras and that is adequate for the duration of a PV session. Swapping the two cameras is obviously unacceptable and someone has to prove it cannot happen (such as use the path for camera ID then it’s up to the user to make sure the cameras aren’t moved from the path). I don’t know how deterministic camera identification is in the Raspberry OS nor PhotonVision. I doubt that I have proven that the RPi will never swap the two cameras as PhotonVision determines their names. Two LifeCam HD-3000 and another test with two ArduCam B0332 with OV9281. I ran two different pairs of identical cameras without trouble. The other tests I promised to run are completed. (Rpi camera v1 and ArduCam day night with OV5647) I ran your exact test and much more without any difficulty on the RPi side or the robot code side. I’m running 4b for these tests.Īnyway I did run tests and get no failures. Maybe they are called different names on the different RPi. I don’t know what I’ve done or misremembered. Those cameras now call themselves unicam. I thought they were the ones on the RPi camera interface (ribbon cable). I ran tests and maybe I’m losing my mind - I do have the excuse that I’m really old! I used to have cameras that reported names as mmal_service_16.1. ![]()
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