video_effect.py sample code not working

[leon6827]

Hi,

I noticed that av.open(drone.get_video_stream()) never returns. Can anyone point out potential area to debug this?

        print("Connect Done")
        drone.wait_for_connection(60.0)
        print("Wait for Connect Done")
        container = av.open(drone.get_video_stream())
        print("AV Open Done")

Logs attached:

Tello: 12:13:03.980: Info: start video thread Tello: 12:13:03.980: Info: send connection request (cmd="conn_req:9617") Tello: 12:13:03.981: Info: video receive buffer size = 524288 Tello: 12:13:03.981: Info: state transit State::disconnected -> State::connecting ===Connect Done Tello: 12:13:04.021: Info: connected. (port=9617) Tello: 12:13:04.021: Info: send_time (cmd=0x46 seq=0x01e4) Tello: 12:13:04.021: Info: state transit State::connecting -> State::connected ===Wait for Connect Done Tello: 12:13:04.055: Info: get video stream Tello: 12:13:04.056: Info: start video (cmd=0x25 seq=0x01e4) Tello: 12:13:04.072: Info: recv: ack: cmd=0x34 seq=0x0000 cc 60 00 27 90 34 00 00 00 00 72 a5 Tello: 12:13:04.073: Info: recv: ack: cmd=0x20 seq=0x0000 cc 60 00 27 b0 20 00 00 00 00 42 b9 Tello: 12:13:04.073: Info: recv: ack: cmd=0x34 seq=0x0000 cc 60 00 27 90 34 00 00 00 00 72 a5 Tello: 12:13:04.073: Info: recv: ack: cmd=0x20 seq=0x0000 cc 60 00 27 b0 20 00 00 00 00 42 b9 Tello: 12:13:07.013: Info: video data 789925 bytes 379.9KB/sec Tello: 12:13:09.015: Info: video data 755506 bytes 368.4KB/sec Tello: 12:13:11.015: Info: video data 753945 bytes 368.1KB/sec Tello: 12:13:13.015: Info: video data 752572 bytes 367.4KB/sec loss=1 Tello: 12:13:14.971: Info: video recv: 1460 bytes 5200 +784 Tello: 12:13:15.031: Info: video data 454465 bytes 220.1KB/sec loss=207 Tello: 12:13:16.759: Info: video recv: 1460 bytes 8300 +228 Tello: 12:13:16.983: Info: video recv: 1460 bytes 8a01 +105 Tello: 12:13:17.277: Info: video recv: 1460 bytes 8a06 +290 Tello: 12:13:17.277: Info: video data 590056 bytes 256.6KB/sec loss=58 Tello: 12:13:17.591: Info: video recv: 1460 bytes 9a07 +270 Tello: 12:13:17.764: Info: video recv: 1460 bytes a600 +145 Tello: 12:13:18.083: Info: video recv: 1460 bytes aa04 +279 Tello: 12:13:18.258: Info: video recv: 1460 bytes b404 +143 Tello: 12:13:18.563: Info: video recv: 1460 bytes b904 +274 Tello: 12:13:18.748: Info: video recv: 1460 bytes be07 +146 Tello: 12:13:18.920: Info: video recv: 1460 bytes c900 +140 Tello: 12:13:19.067: Info: video recv: 1460 bytes c901 +147 Tello: 12:13:19.243: Info: video recv: 1460 bytes d100 +144 Tello: 12:13:19.563: Info: video recv: 1460 bytes d703 +287 Tello: 12:13:19.563: Info: video data 188107 bytes 80.3KB/sec loss=538 Tello: 12:13:19.742: Info: video recv: 1460 bytes e005 +141 Tello: 12:13:19.988: Info: video recv: 1460 bytes e803 +215 Tello: 12:13:20.163: Info: video recv: 1460 bytes ef03 +147 Tello: 12:13:21.570: Info: video data 587037 bytes 285.6KB/sec loss=196 Tello: 12:13:23.151: Info: video recv: 1460 bytes 4a02 +177 Tello: 12:13:23.337: Info: video recv: 1460 bytes 4b00 +165 Tello: 12:13:23.668: Info: video recv: 1460 bytes 5903 +165 Tello: 12:13:23.669: Info: video data 568066 bytes 264.4KB/sec loss=108 Tello: 12:13:24.019: Info: video recv: 1460 bytes 6800 +141 Tello: 12:13:24.197: Info: video recv: 1460 bytes 6d00 +152 Tello: 12:13:24.630: Info: video recv: 1460 bytes 7600 +271 Tello: 12:13:24.814: Info: video recv: 1460 bytes 7f04 +140 Tello: 12:13:24.994: Info: video recv: 1460 bytes 8003 +164 Tello: 12:13:25.160: Info: video recv: 1460 bytes 8a00 +142 Tello: 12:13:25.332: Info: video recv: 1460 bytes 8f00 +134 Tello: 12:13:25.651: Info: video recv: 1460 bytes 9400 +278 Tello: 12:13:25.677: Info: video data 254564 bytes 123.8KB/sec loss=348 Tello: 12:13:25.828: Info: video recv: 1460 bytes 9406 +145 Tello: 12:13:26.005: Info: video recv: 1460 bytes a407 +147 Tello: 12:13:26.185: Info: video recv: 1460 bytes aa00 +164 Tello: 12:13:26.356: Info: video recv: 1460 bytes ab03 +145 Tello: 12:13:26.519: Info: video recv: 1460 bytes b500 +138 Tello: 12:13:26.661: Info: video recv: 1460 bytes b501 +141 Tello: 12:13:26.843: Info: video recv: 1460 bytes bd03 +153

[clydemcqueen]

Try av.container.open(drone.get_video_stream())

[leon6827]

Thanks for the suggestion, but I saw the same log

[leon6827]

PyAV v6.0.0 git origin: git@github.com:mikeboers/PyAV git commit: unknown-commit library configuration: --prefix=/usr/local/Cellar/ffmpeg/4.0.2_1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gpl --enable-libmp3lame --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-opencl --enable-videotoolbox library license: GPL version 3 or later libavcodec 58. 18.100 libavdevice 58. 3.100 libavfilter 7. 16.100 libavformat 58. 12.100 libavutil 56. 14.100 libswresample 3. 1.100 libswscale 5. 1.100

[leon6827]

Seems to be a problem with my busy WiFi environment. In my case, video_data.gap(self.prev_video_data) always >0, then no data will be appended to the queue. This seems cause av.open() to wait forever.

Now why we have this logic? I should have the option to view my video even though it is choppy right?

       elif event is self.drone.EVENT_VIDEO_DATA:
            self.log.debug('%s.handle_event(VIDEO_DATA, size=%d)' % (self.name, len(data)))
            video_data = VideoData(data)
            if 0 < video_data.gap(self.prev_video_data):
                self.wait_first_packet_in_frame = True

            self.prev_video_data = video_data
            if self.wait_first_packet_in_frame and data[1] != 0:
                self.ignore_packets += 1
                return
            if self.wait_first_packet_in_frame:
                self.log.debug('%s.handle_event(VIDEO_DATA): ignore %d packets' %
                               (self.name, self.ignore_packets))
            self.ignore_packets = 0
            self.wait_first_packet_in_frame = False

            self.cond.acquire()
            self.queue.append(data[2:])
            self.cond.notifyAll()
            self.cond.release()

[hanyazou]

It did not work on python 2 for a while. I've fixed the bug today. Could you try the latest version with pip install --upgrade tellopy ?