Streamon Error about easytello

[ezrafielding]

Hi, what OS are you using? This seems to be an issue with calling openCV so the environment may come into play

[kherath6]

Hi Virodroid,

I'm using Mac os.
I have all the packages installed in the environment.

[ezrafielding]

I haven't been able to test easyTello on MacOS yet. Perhaps it doesn't like the way I'm calling OpenCV. I'll see if I can track down a Mac to do some testing on in future. Everything seems to work fine on Windows 10 and Ubuntu

[acdgr8]

Comments
@0bscur3
0bscur3 commented 13 days ago

Hi,

I was trying to get the example.py to work, but video stream does not seem to work. I am using python 3.6.9 on Mac OS.

This is my stdout:

pygame 1.9.4
Hello from the pygame community. https://www.pygame.org/contribute.html
Send command: command
Response: ok
Send command: speed 10
Response: ok
Send command: streamoff
Response: ok
Send command: streamon
Response: ok
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] non-existing PPS 0 referenced
[h264 @ 0x7f86968c6600] decode_slice_header error
[h264 @ 0x7f86968c6600] no frame!
[h264 @ 0x7f869801c800] error while decoding MB 48 23, bytestream -5
[h264 @ 0x7f869801fe00] error while decoding MB 30 41, bytestream -8

Thanks!
@acdgr8
acdgr8 commented 1 hour ago

Hi, I'm getting a similar error when trying to switch on the stream. Interestingly, I am able to extract frames out of it using the following code -
from djitellopy import Tello
import cv2
import time
tello =Tello()
tello.connect()
tello.takeoff()
tello.streamon()
count = 0
vidcap = cv2.VideoCapture(tello.get_udp_video_address())
success,image = vidcap.read()
success = True
while success:
vidcap.set(cv2.CAP_PROP_POS_MSEC,(count*1000))
success,image = vidcap.read()
print ('Read a new frame: ', success)
cv2.imwrite("./img/frame%d.jpg" % count, image) # save frame as JPEG file
count = count + 5

And the frames are being stored correctly. Can someone please help out why the videostream is not being displayed in a separate window.
Thanks in advance!

[tomschofield]

Exactly the same issue here. Any progress on this please?

[rdarmoul]

Me too, I try too run it with macOS,
h264 @ 0x7f99b384ac00] non-existing PPS 0 referenced [h264 @ 0x7f99b384ac00] non-existing PPS 0 referenced [h264 @ 0x7f99b384ac00] decode_slice_header error [h264 @ 0x7f99b384ac00] no frame! [h264 @ 0x7f99b384ac00] non-existing PPS 0 referenced [h264 @ 0x7f99b384ac00] non-existing PPS 0 referenced [h264 @ 0x7f99b384ac00] decode_slice_header error [h264 @ 0x7f99b384ac00] no frame! .... and so on

[manujimele]

Me too, I try too run it with macOS,
h264 @ 0x7f99b384ac00] non-existing PPS 0 referenced [h264 @ 0x7f99b384ac00] non-existing PPS 0 referenced [h264 @ 0x7f99b384ac00] decode_slice_header error [h264 @ 0x7f99b384ac00] no frame! [h264 @ 0x7f99b384ac00] non-existing PPS 0 referenced [h264 @ 0x7f99b384ac00] non-existing PPS 0 referenced [h264 @ 0x7f99b384ac00] decode_slice_header error [h264 @ 0x7f99b384ac00] no frame! .... and so on

Tengo el mismo problema.... ¿Has encontrado alguna solución?
Gracias

[ricafort]

@Virodroid i get the same errors and issue. seems like all 3rd party tello libraries needs to be updated, maybe caused by latest tello firmware update

[faaip]

Having the same issue here. Any news on this?

[ramujin]

@Virodroid any updates on this issue?

[ezrafielding]

Unfortunately, I'm not currently in possession of a DJI Tello to continue development of this library. So I won't be able to make or test any updates going forward. That's why this repo isn't really under "active" development anymore.

[skomatin]

Turns out the issue for me was that opencv was opening windows in a separate thread. MacOS does not allow (or work well with) GUI operations outside the main thread. Workaround was to move all GUI operations to the main thread.