ffmpeg throws error ''udp://10.5.5.100:8554': Invalid argument' with SAVE flag enabled

[ChristopheBrown]

Using GoPro Hero6. I pulled the repo earlier today, all I changed was the SAVE flag (I want to record and save to my Windows 10 PC, not stream), and the save destination. The rest of the code is consistent with the repo. I'm a novice so my apoligies ig the answer is obvious. The streaming works with SAVEing turned off strangely enough. Here's my output:

branch HD4
HERO6 Black
HD6.01.02.01.00
UDP target IP: 10.5.5.9
UDP target port: 8554
message: GPHD:0:0:2:0.000000

Recording on camera: False
Recording locally: True
Recording stored in: C:/Users/USER/Videos/GoPro/goprofeed3.ts
Note: Preview is not available when saving the stream.
Press ctrl+C to quit this application.

ffmpeg version N-94576-g1965161ef6 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 9.1.1 (GCC) 20190807
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
libavutil 56. 33.100 / 56. 33.100
libavcodec 58. 55.100 / 58. 55.100
libavformat 58. 31.101 / 58. 31.101
libavdevice 58. 9.100 / 58. 9.100
libavfilter 7. 58.100 / 7. 58.100
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
'udp://10.5.5.100:8554': Invalid argument

[kyhau]

The "invalid argument" error can be resolved by changing

"ffmpeg -i 'udp://10.5.5.100:8554' -fflags nobuffer -f:v mpegts -probesize 8192 "

to

'ffmpeg -i "udp://10.5.5.100:8554" -fflags nobuffer -f:v mpegts -probesize 8192 '