[FFmpeg-user] is filtering 3 multicast addresses using same port possible?

[robb]

>
>
> Have you tried debugging your command?
>
> Usually you need to send a complete uncut console output from ffmpeg along
> with your issue
>
> ffmpeg -loglevel debug -i udp://@239.255.42.42:5004 -f raw -
>
>
> no, thx 4 askin

$ ffmpeg -loglevel debug -i udp://239.255.42.42:5004 -vcodec copy -codec:a
aac -b:a 128k -f flv test.flv
ffmpeg version N-48443-g6dc1da416e-static https://johnvansickle.com/ffmpeg/
Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
  configuration: --enable-gpl --enable-version3 --enable-static
--disable-debug --disable-ffplay --disable-indev=sndio
--disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r
--enable-gnutls --enable-gmp --enable-gray --enable-libaom
--enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype
--enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libopenjpeg --enable-librubberband --enable-libsoxr
--enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora
--enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx
--enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2
--enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg
  libavutil      56. 26.100 / 56. 26.100
  libavcodec     58. 47.105 / 58. 47.105
  libavformat    58. 26.101 / 58. 26.101
  libavdevice    58.  7.100 / 58.  7.100
  libavfilter     7. 48.100 /  7. 48.100
  libswscale      5.  4.100 /  5.  4.100
  libswresample   3.  4.100 /  3.  4.100
  libpostproc    55.  4.100 / 55.  4.100
Splitting the commandline.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging
level) with argument 'debug'.
Reading option '-i' ... matched as input url with argument 'udp://
239.255.42.42:5004'.
Reading option '-vcodec' ... matched as option 'vcodec' (force video codec
('copy' to copy stream)) with argument 'copy'.
Reading option '-codec:a' ... matched as option 'codec' (codec name) with
argument 'aac'.
Reading option '-b:a' ... matched as option 'b' (video bitrate (please use
-b:v)) with argument '128k'.
Reading option '-f' ... matched as option 'f' (force format) with argument
'flv'.
Reading option 'test.flv' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument debug.
Successfully parsed a group of options.
Parsing a group of options: input url udp://239.255.42.42:5004.
Successfully parsed a group of options.
Opening an input file: udp://239.255.42.42:5004.
[NULL @ 0x5c953c0] Opening 'udp://239.255.42.42:5004' for reading
[udp @ 0x5c95cc0] No default whitelist set
[udp @ 0x5c95cc0] end receive buffer size reported is 131072
[AVIOContext @ 0x5cb6140] Statistics: 0 bytes read, 0 seeks
udp://239.255.42.42:5004: Immediate exit requested
Exiting normally, received signal 2.



when i run it with another device using the port (-i
udp://239.255.42.*44*:5004)
it outputs a file as expected