>ffmpeg -i http://server.domain.com/horse/horse.stream/playlist.m3u8 -i http://cdn-si
gnal-bowl50.tunein.com/tiger/tiger.stream/playlist.m3u8 -i http://server.domain.com
/christopherrobin/christopherrobin.stream/playlist.m3u8 -i http://server.domain.com/mexico/mexico.strea
m/playlist.m3u8 -flags +global_header -filter_complex "[0:a][1:a]amerge=inputs=4,pan=4c|bl<c0+c1|fl<
c2+c3|fr<c4+c5|br<c6+c7[aout]" -map "[aout]" -f flv "rtmp://ec03signalin01.tinonprod.net/ingress/cou
ntry_1"
ffmpeg version N-76822-g12a419d Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 5.2.0 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzli
b --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libblu
ray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab
le-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger
 --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --ena
ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --en
able-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --
enable-lzma --enable-decklink --enable-zlib
  libavutil      55.  9.100 / 55.  9.100
  libavcodec     57. 16.100 / 57. 16.100
  libavformat    57. 19.100 / 57. 19.100
  libavdevice    57.  0.100 / 57.  0.100
  libavfilter     6. 15.100 /  6. 15.100
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
[mp3 @ 00000000003e4120] Skipping 0 bytes of junk at 0.
Input #0, hls,applehttp, from 'http://server.domain.com/horse/horse.stream/playlist.m
3u8':
  Duration: N/A, start: 71480.111022, bitrate: 128 kb/s
  Program 0
    Metadata:
      variant_bitrate : 128067
    Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
    Metadata:
      variant_bitrate : 128067
Input #1, hls,applehttp, from 'http://server.domain.com/tiger/tiger.stream/playlist
.m3u8':
  Duration: N/A, start: 71420.168711, bitrate: 32 kb/s
  Program 0
    Metadata:
      variant_bitrate : 32088
    Stream #1:0: Audio: aac (HE-AACv2), 44100 Hz, stereo, fltp, 32 kb/s
    Metadata:
      variant_bitrate : 32088
[mp3 @ 0000000000435580] Skipping 0 bytes of junk at 0.
Input #2, hls,applehttp, from 'http://server.domain.com/christopherrobin/christopherrobin.stream/playlist
.m3u8':
  Duration: N/A, start: 71470.080000, bitrate: 128 kb/s
  Program 0
    Metadata:
      variant_bitrate : 128066
    Stream #2:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
    Metadata:
      variant_bitrate : 128066
[aac @ 00000000036e0ec0] element type mismatch 1 != 0
[aac @ 00000000036e14c0] element type mismatch 1 != 0
Input #3, hls,applehttp, from 'http://server.domain.com/mexico/mexico.stream/playlist.m
3u8':
  Duration: N/A, start: 71460.153467, bitrate: 59 kb/s
  Program 0
    Metadata:
      variant_bitrate : 65350
    Stream #3:0: Audio: aac (HE-AAC), 44100 Hz, stereo, fltp, 59 kb/s
    Metadata:
      variant_bitrate : 65350
[Parsed_pan_1 @ 00000000036ede80] Expected out channel name, got "bl<c0+c1"
[AVFilterGraph @ 00000000004027e0] Error initializing filter 'pan' with args '4c|bl<c0+c1|fl<c2+c3|f
r<c4+c5|br<c6+c7'
Error initializing complex filters.
Invalid argument