Does the video stream function work with Wifi Adapter?

[francisduan]

Hey really cool design. I have used the scripts well on my laptop, but when I transferred everything to my PC, which uses a Wifi adapter to communicate with Tello, the video stream function seems to be not working. The other commands such as take off and moving functions work fine, it is only the video stream function that I could not duplicate. Could you help me a bit on this?

Tello: 14:02:56.879: Info: start video thread Tello: 14:02:56.879: Info: send connection request (cmd="conn_req:9617") Tello: 14:02:56.880: Info: video receive buffer size = 524288 Tello: 14:02:56.880: Info: state transit State::disconnected -> State::connecting Tello: 14:02:56.885: Info: connected. (port=9617) Tello: 14:02:56.885: Info: send_time (cmd=0x46 seq=0x01e4) Tello: 14:02:56.885: Info: state transit State::connecting -> State::connected connected Tello: 14:02:56.885: Info: start video (cmd=0x25 seq=0x01e4) Tello: 14:02:56.885: Info: set exposure (cmd=0x34 seq=0x01e4) Tello: 14:02:56.886: Info: set video encoder rate (cmd=0x20 seq=01e4) Tello: 14:02:56.889: Info: get video stream Tello: 14:02:56.889: Info: start video (cmd=0x25 seq=0x01e4) Tello: 14:02:56.936: Info: recv: ack: cmd=0x34 seq=0x0000 cc 60 00 27 90 34 00 00 00 00 72 a5 Tello: 14:02:56.937: Info: recv: ack: cmd=0x20 seq=0x0000 cc 60 00 27 b0 20 00 00 00 00 42 b9 Tello: 14:02:56.938: Info: recv: ack: cmd=0x34 seq=0x0000 cc 60 00 27 90 34 00 00 00 00 72 a5 Tello: 14:02:56.939: Info: recv: ack: cmd=0x20 seq=0x0000 cc 60 00 27 b0 20 00 00 00 00 42 b9 Tello: 14:02:56.939: Info: recv: ack: cmd=0x34 seq=0x0000 cc 60 00 27 90 34 00 00 00 00 72 a5 Tello: 14:02:56.940: Info: recv: ack: cmd=0x20 seq=0x0000 cc 60 00 27 b0 20 00 00 00 00 42 b9 Tello: 14:02:56.941: Info: recv: ack: cmd=0x34 seq=0x0000 cc 60 00 27 90 34 00 00 00 00 72 a5 Tello: 14:02:56.941: Info: recv: ack: cmd=0x20 seq=0x0000 cc 60 00 27 b0 20 00 00 00 00 42 b9 event="time" data=52480 height= 0, fly_mode=0x01, battery_percentage=56, drone_battery_left=0x0000 event="time" data=59392 height= 0, fly_mode=0x01, battery_percentage=55, drone_battery_left=0x0000 event="time" data=1536 Tello: 14:03:02.882: Error: video recv: timeout event="time" data=8448 event="time" data=15360 Tello: 14:03:07.882: Error: video recv: timeout event="time" data=22272 event="time" data=29440 Tello: 14:03:12.883: Error: video recv: timeout

[francisduan]

In fact I do not even need video stream, I just need Tello to take an image capture when I give him a command. It worked fine on my laptop but it really makes me frustrated on the new PC.

container = av.open(drone.get_video_stream()) for frame in container.decode(video=0): image = cv2.cvtColor(numpy.array(frame.to_image()), cv2.COLOR_RGB2BGR) cv2.imwrite("capture_0.jpg", image) break

[hanyazou]

I have no idea about your wifi trouble, sorry. But @ToxicFrog implemented the still image capture function. Please search 'take_picture' in his sample app to find how to use the function.

https://github.com/hanyazou/TelloPy/blob/develop-0.6.0/tellopy/examples/keyboard_and_video.py

[ToxicFrog]

Bear in mind that you will need to permit your firewall to allow outgoing UDP traffic to, and incoming UDP traffic from, the Tello; if it works on one machine but not on the other, that's the most likely cause, and the symptoms you describe sound like your firewall is letting the computer send commands to the Tello but rejecting the image packets the Tello is sending to the computer.

Try opening inbound UDP ports 9000, 9617, and 6038 -- or just temporarily disabling the firewall for the wifi adapter -- and see if that helps.

[francisduan]

Thanks for the help! It worked!

Francis On Sun, 30 Sep 2018 at 13:56 Ben Kelly notifications@github.com wrote:

Bear in mind that you will need to permit your firewall to allow outgoing UDP traffic to, and incoming UDP traffic from, the Tello; if it works on one machine but not on the other, that's the most likely cause, and the symptoms you describe sound like your firewall is letting the computer send commands to the Tello but rejecting the image packets the Tello is sending to the computer.

Try opening inbound UDP ports 9000, 9617, and 6038 -- or just temporarily disabling the firewall for the wifi adapter -- and see if that helps.

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/hanyazou/TelloPy/issues/13#issuecomment-425738808, or mute the thread https://github.com/notifications/unsubscribe-auth/AJ_rsAov7rlbVyXYWhND0uSwV96kN_ihks5ugQW4gaJpZM4VVwh1 .

[francisduan]

Hey Ben,

I am trying to to feed the live stream into Unity. So that users could see what tells sees in the designed program. So the problem now is to move the open cv videos to Unity webcam or video player.

I have little experitise in UDP transmission. Could you give me some insights on how to achieve this feature( link to other github files is fine as well).

Thanks, Francis On Sun, 30 Sep 2018 at 13:56 Ben Kelly notifications@github.com wrote:

Bear in mind that you will need to permit your firewall to allow outgoing UDP traffic to, and incoming UDP traffic from, the Tello; if it works on one machine but not on the other, that's the most likely cause, and the symptoms you describe sound like your firewall is letting the computer send commands to the Tello but rejecting the image packets the Tello is sending to the computer.

Try opening inbound UDP ports 9000, 9617, and 6038 -- or just temporarily disabling the firewall for the wifi adapter -- and see if that helps.

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/hanyazou/TelloPy/issues/13#issuecomment-425738808, or mute the thread https://github.com/notifications/unsubscribe-auth/AJ_rsAov7rlbVyXYWhND0uSwV96kN_ihks5ugQW4gaJpZM4VVwh1 .