Tello | A simple and delightful way to track and manage TV shows | State Container library
kandi X-RAY | Tello Summary
kandi X-RAY | Tello Summary
A simple and delightful way to track and manage TV shows.
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Tello Key Features
Tello Examples and Code Snippets
Community Discussions
Trending Discussions on Tello
QUESTION
I am trying to use Gstreamer to stream video from Tello drone into RTP, so that to use it further with jetson inference. The computer to receive the UDP packages is Jetson Nano. The most succesful command till now was
...ANSWER
Answered 2022-Feb-01 at 19:23Your problem is that decodebin selects nvv4l2decoder that outputs into NVMM memory. videoconvert cannot read from NVMM memory. You would use nvvidconv instead that can read from NVMM and output into system memory.
However, it is not mandatory to decode h264 for reencoding into h264. This simple pipeline should do the job:
QUESTION
I'm new to python, but I'm trying to learn it by myself for a university course. Therefore I have to program a pygame window that represents a drone fly zone (The drone should fly automated like a search helicopter in a given area and on the window a visual representation of what happens should be displayed...).
How an older version of the pygame window look's like when the virtual drone flies.
So far so good.
Now I have to link the movements of the game-represented drone with the real Tello drone. I figured out that using threading for the movement commands to the drone is the way to go when the pygame window should run the whole time.
But now I got stuck because I have to delay the automated movements in pygame in order to wait for the drone flight time and response.
I update the pygame window with a clock
set to tick(60)
in the loop of the game (therefore I created a Clock clock = pygame.time.Clock()
in the initialization of the pygame program), but for the automated drone movements I created an Userevent.
The drone movements is trigger like a Snake game via a Userevent witch should be triggered every second.
Therefor I implemented a timer:
...ANSWER
Answered 2022-Jan-18 at 18:20From what is sounds like, I would guess you want to wait for an event in another thread whilst keeping the main loop running, in which case I think you should try using pygame.event.post()
function. This function is apparently thread safe so as long as it is called from a thread that was started after pygame.init()
it should definitely work. You can create a custom event using the pygame.event.custom_type()
function, meaning that you can wait for the event to be returned without having to pause the display. Comment below if you have any questions.
Edit:
Adding a code example for clarity:
QUESTION
I'm currently working on a Tkinter GUI for my DJI Tello, and I'm trying to make it so that when I command the drone to takeoff/land, the streamed video on the GUI does not freeze. I'm not too familiar with multithreading, but I looked the issue up and it seems like I'm not the only one encountering this. So I used what I found regarding threading and starting threads, and ended up with this line (more or less):
...ANSWER
Answered 2022-Jan-03 at 19:42Ok so I actually managed to figure out the solution this morning based on this article:
https://bhaveshsingh0124.medium.com/multi-threading-on-python-tkinter-button-f0d9f759ad3e
Essentially, what I had to do was thread the Tello commands WITHIN the function that I'm calling with the button, rather than that function itself. Since the drone can only land OR take off, it can create a new thread each time one of those two commands is called. Here is the fixed code:
QUESTION
I am trying to achieve the network architecture above. The Pi is connected to the drone via WiFi, and it is connected to the Access Point via ethernet.
How can I route packets via the Raspberry Pi to a Tello drone, and from a Tello drone via the Raspberry Pi to 192.168.1.100? What iptables commands could I use?
This is the simple python script I am using to send the drone commands from 192.168.1.100.
...ANSWER
Answered 2021-Jun-02 at 17:15Sry for late reply, just back from some testing.
You may follow this thread here for some answer
https://stackoverflow.com/a/67664774/11530294
the key command to achieve the forwarding is sudo iptabels
You may refer to this technical report for details. https://github.com/snakehaihai/Tello_formation_and_visual_control/blob/master/Technical%20Report.pdf . The key command and instructions are all in the appendix section
The rest of github repo construction isn`t complete yet. but the key command is already provided in technical report. For visual SLAM based navigation, the core source code is here but need tons of tuning.
QUESTION
I am currently working on a project where I send UDP commands to a Tello drone. The problem is that it uses UDP and when I send commands too fast before the previous one hasn't finished yet, the second command/action doesn't take place. I am using RxJS for this project and I want to create a mechanism to wait for the response ("ok" or "error") from the drone.
My Idea is to have 2 different observables. 1 observable that is the input stream from the responses from the drone and one observable of observables that I use as a commandQueue
. This commandQueue
has simple observables on it with 1 command I want to send. And I only want to send the next command when I received the "ok" message from the other observable. When I get the "ok" I would complete the simple command observable and it would automatically receive the next value on the commandQueue
, being the next command.
My code works only when I send an array of commands, but I want to call the function multiple times, so sending them 1 by 1.
The following code is the function in question, testsubject is an observable to send the next command to the drone.
...ANSWER
Answered 2021-Mar-27 at 13:42You can accomplish sending commands one at a time by using a simple subject to push commands through and those emissions through concatMap
which will execute them one at a time.
Instead of trying to put all the logic in a single function, it will may be easier to make a simple class, maybe call it TelloService
or something:
QUESTION
I have developed the following exercise, I must ensure that according to the department it shows me the cities that correspond to it based on the JSON file, so far I have managed to show me the departments in their selected selections, but I have not managed to show me only the cities that corresponds to each department in their respective selects. My code is the following: enter image description here
DATA JSON
...ANSWER
Answered 2020-Aug-14 at 04:49Every time the departmento select is changed, you are populating the ciudad select. You never empty the options added from the previous time the departmento select was changed.
QUESTION
I want to receive frames from UDP port and run face recognition algorithms on them with opencv cv::dnn framework. Tello drone is sending frames over UDP protocol.
...ANSWER
Answered 2020-Jul-15 at 16:28With unreliable protocols like UDP, where the comms stack can, and will, discard data if not promptly taken out to user space, it's important to attach a high importance to reading data, even at the expense of added complexity in the recv code.
In this case, a separate thread can be used to extract datagrams as soon as available and queueing the buffers, (pointers to buffers, anyway), off to processing code that, otherwise, would result in excessive time use and dropped datagrams.
Hey - it worked!
QUESTION
I have a tello ryze drone, which has got a camera onboard. I am connecting to the drone in order to receive the video over wifi. My system is windows 10 and I am using python 2.7.
I am receiving a h264 bytecode and i use the libh264 decoder from tello in order to get the frames of the video, which i also display in my UI. What i need to do is to save this video as a file on my computer and i have problems with this. I am able to make a snapshot with opencv and save it as an image, this isn't a problem. But making a video isn't working for some reason. I read many posts here like this one but they dont work out for me. I am getting either an error or i get a very small video file, which doesnt open. My Frames are List of List with RGB values like:
...ANSWER
Answered 2020-Feb-26 at 09:26I found the solution, so i will post it here if someone needs the same thing. I used the following blog and modified the code to do my work, you can find the post here
QUESTION
Hello i am pretty new in python and i have some problems with the oop. I am used to java where you can easily acces methods from other classes over the object/instance.
I am trying the following thing:
...ANSWER
Answered 2020-Feb-05 at 13:22You imported drone
as a class defintion, not as an object. It should be:
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