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• Is there a way to create a single HLS output from more than one RTMP inputs in listen mode ?

  25 novembre 2020, par Gabriele Tassoni

  I'm trying to create a single HLS output using, as inputs, different RTMP playpaths or different RTMP streams, i.e. :

  


  

  • rtmp ://ip:1935/app/key0

  


  • rtmp ://ip:1935/app/key1

  


  • rtmp ://ip:1935/app/key2

  


  


  The resulting HLS output should have video track from key0, and three audio tracks from key0, key1 and key2.

  


  I used FFMPEG, but I'm open to different open source software for the server/converter part.

  


  What I tried so far :

  


  NO RTMP approach

  


  I get in input anything thrown to a TCP port, the mp4 stream sent already has multiple audio tracks, this works well and the HLS output is correctly created, cons : it's not compatible with RTMP standard, many commercial software, like vMix, just live streams to RTMP, so I cannot use this approach.

  


  ffmpeg -y -hwaccel auto \
    -i tcp://0.0.0.0:${port}?listen \
    -map 0:0 \
    -map 0:a \
    -c:v libx264 -c:a aac -b:v 5000k -b:a 192k -vf "scale=1920:trunc(ow/a/2)*2" -tune zerolatency -preset veryfast -crf 23 -g 48 \
      -f hls -hls_time 4 -hls_playlist_type event -hls_segment_filename ${dir}/${name}/1080p_%03d.ts ${dir}/${name}/1080p.m3u8


  


  NGINX RTMP Module

  


  I used in NGINX RTMP an application which execs an ffmpeg command, cons : it doesn't work, it sits there forever, like it's waiting for something.

  


  ffmpeg -y -hwaccel auto \
        -i "rtmp://localhost:1935/mainav/$key" \
        -i "rtmp://localhost:1935/mainav/$name:lang:$lang" \
        -map 0:v:0 -map 0:a:0 -metadata:s:a:0 "language=$default" \
        -map "1:a:0" -metadata:s:a:1 "language=$lang" \
        -c:v libx264 -c:a aac -b:v 5000k -b:a 192k -vf "scale=1920:trunc(ow/a/2)*2" -tune zerolatency -preset veryfast -crf 23 -g 48 \
        -f hls -hls_time 4 -hls_playlist_type event -hls_segment_filename "${dir}/${name}/1080p_%03d.ts" "${dir}/${name}/1080p.m3u8"



  


  FFMPEG Listener

  


  Quite similar to the NGINX version, but without NGINX, going raw on bare ffmpeg server capabilities. Cons : it doesn't work, just throws an I/O Error as soon as the client connects.

  


  ffmpeg -y -hwaccel auto \
            -listen 1 -i "rtmp://0.0.0.0:1935/mainav/$key" \
            -listen 1 -i "rtmp://0.0.0.0:1935/mainav/$name:lang:$lang" \
            -map 0:v:0 -map 0:a:0 -metadata:s:a:0 "language=$default" \
            -map "1:a:0" -metadata:s:a:1 "language=$lang" \
            -c:v libx264 -c:a aac -b:v 5000k -b:a 192k -vf "scale=1920:trunc(ow/a/2)*2" -tune zerolatency -preset veryfast -crf 23 -g 48 \
            -f hls -hls_time 4 -hls_playlist_type event -hls_segment_filename "${dir}/${name}/1080p_%03d.ts" "${dir}/${name}/1080p.m3u8"


  


  Client used for tests

  


  I used an ffmpeg which reads a file from my disk and sends to different RTMP playpaths :

  


  ffmpeg -y -hwaccel auto -re \
    -i /home/me/Videos/xm.mkv \
    -map 0:v:0 \
    -map 0:a:0 \
    -f flv rtmp://localhost:1935/mainav/thebiglive:default:ita \
    -map 0:a:1 \
    -f flv rtmp://localhost:1935/mainav/thebiglive:lang:eng


  


  I feel a bit clueless now. The only working solution is not a standard one taken into account the common live encoders found in the market. Anyone has a pointer for which direction I can take ?

  


  Thanks

  


• build ffmpeg with my static lib "undefined reference to" [duplicate]

  7 septembre 2020, par Vassago

  exec

  


  nvcc xtest.cu -c
ar rcs libxtest.a xtest.o


  


  get libxtest.a

  


  dir : /root/work/xtest.cu /root/work/include/xtest.h /root/work/lib/libxtest.a

  


  Then I copy root/work/include/xtest.h root/work/lib/libxtest.a to /root/work/FFmpeg/libavfiler direction
And add my fuc : int test() (which is in xtest.cu) to myfilter.c

  


  next

  


  ./configure \
  --prefix="$HOME/ffmpeg_build" \
  --pkg-config-flags="--static" \
  --extra-cflags="-I/root/work/include" \
  --extra-ldflags="-L/root/work/lib" \
  --extra-libs="-lpthread -lm" \
  --bindir="$HOME/bin" \
  --enable-gpl \
  --enable-gnutls \
  --disable-libaom \
  --enable-libass \
  --disable-libfdk-aac \
  --disable-libfreetype \
  --disable-libmp3lame \
  --disable-libopus \
  --disable-libvorbis \
  --disable-libvpx \
  --enable-nonfree

make


  


  error :

  


  AR  libavfilter/libavfilter.a
LD  ffmpeg_g
libavfilter/libxtest.a(vf_colorcalc.o): In function `colorcale_filter_frame':
/root/work/FFmpeg/libavfilter/vf_colorcalc.c:166: undefined reference to `test'
collect2: error: ld returned 1 exit status
Makefile:114: recipe for target 'ffmpeg_g' failed
make: *** [ffmpeg_g] Error 1



  


  please teach me how to build static lib to FFmpeg

  


• ffmpeg - error message "Invalid data found when processing input" when trying to convert a video file but video is playable

  1er septembre 2020, par Rotem

  I'm using ffmpeg version

  


  ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers
  built with Apple clang version 11.0.0 (clang-1100.0.33.8)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.1_1 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/adoptopenjdk-13.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/adoptopenjdk-13.jdk/Contents/Home/include/darwin -fno-stack-check' --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100


  


  When I try to process this video using this command

  


  ffmpeg -i IMG_0029.mp4 -y newvideo2.mp4


  


  I get this output

  


  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f8a1f008200] could not find corresponding trex (id 1)
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f8a1f008200] could not find corresponding track id 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f8a1f008200] trun track id unknown, no tfhd was found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f8a1f008200] error reading header
IMG_0029.mp4: Invalid data found when processing input


  


  I don't understand what is the problem as the video is playable.

  


  Would appreciate any help.