view UDP output?

[jonbjohns]

using liveView.py. I get feedback that my camera is unlocked and the live view stream starts, but I've been unable to view it.

I tried the capture example
ffmpeg -i 'udp://224.0.0.100:10101?&localaddr=10.100.1.100' -vcodec copy output.mp4

I get a large response. it seems like it is going, but I don't see a file generated where I triggered the command:

ffmpeg version 2023-02-02-git-7d49fef8b4-full_build-www.gyan.dev Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 12.2.0 (Rev10, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      57. 44.100 / 57. 44.100
  libavcodec     59. 61.100 / 59. 61.100
  libavformat    59. 37.100 / 59. 37.100
  libavdevice    59.  8.101 / 59.  8.101
  libavfilter     8. 56.100 /  8. 56.100
  libswscale      6.  8.112 /  6.  8.112
  libswresample   4.  9.100 /  4.  9.100
  libpostproc    56.  7.100 / 56.  7.100

I also tried using VLC and got nothing back. I've tried

udp://224.0.0.100:10101
udp://10.100.1.100
udp://10.100.1.100:5678

based on the examples in liveView.py and got no response

[ea]

Thanks for trying it out!

Live view images/video is transmitted over multicast UDP which can be tricky to set up correctly on the client side and can be buggy. That ffmpeg command should work , but can be unstable (and might also depend on the firewall settings).

Are you on linux ? If you can start wireshark listening on the wifi interface , you should be able to see the packets, to at least confirm that the camera is transmitting.

Alternatively, trying a couple of times might get it working.

I'll try to make a custom client/script that does it correctly when I get some more free time.

[jonbjohns]

i'm on windows.

[ea]

Ah, ok. I'll give it a try on Windows to see if it will work. As I mentioned, multicast UDP can be problematic due to many reasons.