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• Using FFMPEG to split a 16 channel audio input source into 4 seperate 4 channel audio feeds for streaming

  30 décembre 2019, par Mathew Knight

  I hope someone can help

  I am currently trying to split a 16ch Dante audio feed from a separate machine into 4 different audio streams that I can use to then TX via RTMP to Wowza for MPEG-DASH encoding, at present i am just trying to split them into files, I will add the RTMP streaming later.

  The biggest issue I am encountering at current is that FFMPEG is returning me this error from my input string

  Filter channelsplit:WR has an unconnected output

  here is my current input string

  ffmpeg -f dshow -i audio="Dante Via Receive (Dante Via)" -filter_complex "[0:a]channelsplit=channel_layout=hexadecagonal[FL][FR][FC][BL][BR][BC][SL][SR][TFL][TFC][TFR][TBL][TBC][TBR][WL][WR]" -map "[FL][FR][FC][BL]" 1-4.wav -map "[BR][BC][SL][SR]" 5-8.wav -map "[TFL][TFC][TFR][TBL]" 9-12.wav -map "[TBC][TBR][WL][WR]" 13-16.wav

  and here is the full FFMPEG output

  ffmpeg version git-2019-12-26-b0d0d7e Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 9.2.1 (GCC) 20191125
  
    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-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  
    libavutil      56. 37.100 / 56. 37.100
  
    libavcodec     58. 65.100 / 58. 65.100
  
    libavformat    58. 35.101 / 58. 35.101
  
    libavdevice    58.  9.101 / 58.  9.101
  
    libavfilter     7. 69.101 /  7. 69.101
  
    libswscale      5.  6.100 /  5.  6.100
  
    libswresample   3.  6.100 /  3.  6.100
  
    libpostproc    55.  6.100 / 55.  6.100
  
  Guessed Channel Layout for Input Stream #0.0 : stereo
  
  Input #0, dshow, from 'audio=Dante Via Receive (Dante Via)':
  
    Duration: N/A, start: 103082.790000, bitrate: 1411 kb/s
  
      Stream #0:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
  
  File '1-4.wav' already exists. Overwrite? [y/N] y
  
  File '5-8.wav' already exists. Overwrite? [y/N] y
  
  File '9-12.wav' already exists. Overwrite? [y/N] y
  
  File '13-16.wav' already exists. Overwrite? [y/N] y
  
  Filter channelsplit:WR has an unconnected output 

  I’m also getting the issue where FFMPEG is guessing that the channel count is stereo, which is incorrect but i’m having problems figuring out how to define the input stream as 16ch’s of audio

  Any help with this would be greatly recieved

  Cheers

  M

• ffmpeg function/alias in .bash_aliases [duplicate]

  29 décembre 2019, par unammusic

  This question already has an answer here :

  • How do I use variables in single quoted strings ?
    
    7 answers
    

  I’m trying to build a function in my aliases to avoid typing the whole ffmpeg command everytime for a simple video cut like this :

  ffmpeg -ss 00:00:00 -t 00:00:10 -i video.mp4 -vcodec copy -acodec copy video_cut.mp4

  So I came up with this idea :

  function ffmpeg-cut () {
  
    ffmpeg -ss '$1' -t '$2' -i '$3' -vcodec copy -acodec copy '$3'_cut.mp4
  
  }

  or as a one liner :

  alias ffmpeg-cut='ffmpeg -ss '$1' -t '$2' -i '$3' -vcodec copy -acodec copy '$3'_cut.mp4'

  I guess it’s some kind of syntax error but I can’t figure out. Anyone any idea ? This is my output when I try :

  es@es-ubuntu-station:~/Downloads$ ffmpeg-cut 00:00:00 00:00:10 cut-test.mp4 
  
  ffmpeg version 4.1.4-1build2 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 9 (Ubuntu 9.2.1-4ubuntu1)
  
    configuration: --prefix=/usr --extra-version=1build2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  
    libavutil      56. 22.100 / 56. 22.100
  
    libavcodec     58. 35.100 / 58. 35.100
  
    libavformat    58. 20.100 / 58. 20.100
  
    libavdevice    58.  5.100 / 58.  5.100
  
    libavfilter     7. 40.101 /  7. 40.101
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100
  
  Invalid duration specification for ss: -t

  What am I doing wrong ?

  Thanks in advance for help !

• Creating mosaic stack 25 videos ffmpeg windows cmd

  26 décembre 2019, par KIngking431

  Hi I am trying to make a video mosaic of 25 videos in ffmpeg

  I used Jim B’s perl script to make this script, previous on my mac it worked.
  But I can’t get it to work on my windows computer in command prompt.
  I think it executes each line of code individually

  ffmpeg \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Aarhus H 2019-12-25 15-06-03.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Aller°d 2019-10-15 17-09-32.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Ballerup St. 2019-10-19 10-58-47.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Charlottenlund.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Cph Lufthavn 2019-11-23 12-49-47.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Dyssegσrd St. 2019-10-29 19-41-17.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Ejby St. 2019-10-30 19-28-05.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Fruens B°ge St.2019-11-04 08-34-53.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Give St. 2019-11-05 12-49-39.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Hjerm St. 2019-11-13 13-40-01.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Islev St.2019-11-18 11-40-19.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Jyderup St.2019-11-19 08-18-10.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Kildebakke St 2019-11-20 20-15-20.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Lem St.2019-11-24 06-51-02.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Middelpart St 2019-11-24 19-07-51.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//N°rre Aaby St 2019-11-26 17-01-06.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Ordrup St 2019-11-28 12-10-28.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Padborg St 2019-11-28 14-05-33.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Roskilde St. 2019-12-02 11-53-34.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Snedsted St. 2019-12-06 17-06-49.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Trekroner St. 2019-12-12 20-39-38.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Ulstrup St. 2019-12-16 09-58-18.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Vojens St. 2019-12-19 12-02-10.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Ydby St. 2019-12-25 16-55-38.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//╪lgod St. 2019-12-23 09-36-51.mkv \
  
    -filter_complex " \
  
        [0:v] setpts=PTS-STARTPTS, scale=qqvga [a0]; \
  
        [1:v] setpts=PTS-STARTPTS, scale=qqvga [a1]; \
  
        [2:v] setpts=PTS-STARTPTS, scale=qqvga [a2]; \
  
        [3:v] setpts=PTS-STARTPTS, scale=qqvga [a3]; \
  
        [4:v] setpts=PTS-STARTPTS, scale=qqvga [a4]; \
  
        [5:v] setpts=PTS-STARTPTS, scale=qqvga [a5]; \
  
        [6:v] setpts=PTS-STARTPTS, scale=qqvga [a6]; \
  
        [7:v] setpts=PTS-STARTPTS, scale=qqvga [a7]; \
  
        [8:v] setpts=PTS-STARTPTS, scale=qqvga [a8]; \
  
        [9:v] setpts=PTS-STARTPTS, scale=qqvga [a9]; \
  
        [10:v] setpts=PTS-STARTPTS, scale=qqvga [a10]; \
  
        [11:v] setpts=PTS-STARTPTS, scale=qqvga [a11]; \
  
        [12:v] setpts=PTS-STARTPTS, scale=qqvga [a12]; \
  
        [13:v] setpts=PTS-STARTPTS, scale=qqvga [a13]; \
  
        [14:v] setpts=PTS-STARTPTS, scale=qqvga [a14]; \
  
        [15:v] setpts=PTS-STARTPTS, scale=qqvga [a15]; \
  
        [16:v] setpts=PTS-STARTPTS, scale=qqvga [a16]; \
  
        [17:v] setpts=PTS-STARTPTS, scale=qqvga [a17]; \
  
        [18:v] setpts=PTS-STARTPTS, scale=qqvga [a18]; \
  
        [19:v] setpts=PTS-STARTPTS, scale=qqvga [a19]; \
  
        [20:v] setpts=PTS-STARTPTS, scale=qqvga [a20]; \
  
        [21:v] setpts=PTS-STARTPTS, scale=qqvga [a21]; \
  
        [22:v] setpts=PTS-STARTPTS, scale=qqvga [a22]; \
  
        [23:v] setpts=PTS-STARTPTS, scale=qqvga [a23]; \
  
        [24:v] setpts=PTS-STARTPTS, scale=qqvga [a24]; \
  
        [a0][a1][a2][a3][a4][a5][a6][a7][a8][a9][a10][a11][a12][a13][a14][a15][a16][a17][a18][a19][a20][a21][a22][a23][a24]xstack=inputs=25:layout=0_0|w0_0|w0+w1_0|w0+w1+w2_0|w0+w1+w2+w3_0|0_h0|w0_h0|w0+w1_h0|w0+w1+w2_h0|w0+w1+w2+w3_h0|0_h0+h1|w0_h0+h1|w0+w1_h0+h1|w0+w1+w2_h0+h1|w0+w1+w2+w3_h0+h1|0_h0+h1+h2|w0_h0+h1+h2|w0+w1_h0+h1+h2|w0+w1+w2_h0+h1+h2|w0+w1+w2+w3_h0+h1+h2|0_h0+h1+h2+h3|w0_h0+h1+h2+h3|w0+w1_h0+h1+h2+h3|w0+w1+w2_h0+h1+h2+h3|w0+w1+w2+w3_h0+h1+h2+h3[out] \
  
        " \
  
      -map "[out]" \
  
      -c:v libx264 -t '30' -f matroska -  | ffplay -autoexit -left 10 -top 10  -

  I tried making powershell scripts for this but with no luck, I also tried to run it in the bash implemented in cmd.
  Is there something fundamental about commandprompt I am missing ?