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• Is it possible to merge 3 videos with ffmpeg by -f concat and crossfade without video content

  10 août 2019, par user3792705

  I want to merge 3 .mov files quickly without losing any resolution. I want to be able to distinguish the 3 pieces of videos after merge.

  "ffmpeg -f concat" does not lose resolution and quick without crossfade.

  But, I can’t distinguish 3 videos.

  As far as I know ffmpeg filter can be used add crossfade, but it have to use video start/end content to do the merger, which might involve transcoding. It won’t be fast compared with ’concat’, which won’t do transcoding, but simply copying.

  Here is the content (ffmpeg -i video.mov) of one of 3 videos :

  ffmpeg version 4.1.3 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with Apple LLVM version 10.0.1 (clang-1001.0.46.3)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1.3 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/openjdk-12.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/openjdk-12.jdk/Contents/Home/include/darwin' --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-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-videotoolbox --disable-libjack --disable-indev=jack --enable-libaom --enable-libsoxr
  
    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
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '..../(edited)/VMEK8375.MOV':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 0
  
      compatible_brands: qt  
  
      creation_time   : 2019-06-30T01:28:04.000000Z
  
      com.apple.quicktime.model: iPhone
  
      com.apple.quicktime.software: ZHIYUN
  
      com.apple.quicktime.creationdate: 2019-06-30T09:28:04Z
  
    Duration: 00:00:07.61, start: 0.000000, bitrate: 4386 kb/s
  
      Stream #0:0(und): Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, smpte170m/bt709/bt709), 1280x720, 4329 kb/s, 30.01 fps, 30 tbr, 600 tbn, 600 tbc (default)
  
      Metadata:
  
        creation_time   : 2019-06-30T01:28:04.000000Z
  
        handler_name    : Core Media Video
  
        encoder         : HEVC
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 94 kb/s (default)
  
      Metadata:
  
        creation_time   : 2019-06-30T01:28:04.000000Z
  
        handler_name    : Core Media Audio

  If I don’t care about crossfade with video content, just some ’nice’ black screen in between (It would be nice I add some text, like date + time on the black screen) is good enough for me. Is it possible to do ’concat’ and simple crossfade without video ’content’ ?

• split quadri audio file into 4 monos

  23 août 2019, par user2216280

  I have a quadri audio file (one stream of 4tracks) and I would like to make 4 monos track from that stream/

  ffmpeg -i TRACK-026.wav -filter_complex "channelsplit=channel_layout=4[Perche][MixHf][hf1][hf2]" -map "[Perche]" perche.wav -map "[MixHF]" MixHF.wav -map "[hf1]" hf1.wav -map "[hf2]" hf2.wav

  here’s the full log :

  Guessed Channel Layout for Input Stream #0.0 : 4.0
  
  Input #0, wav, from 'TRACK-026.wav':
  
    Metadata:
  
  comment         : sSPEED=030.000-ND
  
                  : sTAKE=026
  
                  : sUBITS=$00000000
  
                  : sSWVER=2.10.71
  
                  : sSCENE=Track
  
                  : sFILENAME=TRACK-026.WAV
  
                  : sTAPE=190822
  
                  : sCIRCLED=FALSE
  
                  : sTRK1=Perche
  
                  : sTRK2=MixHF
  
                  : sTRK4=hf1
  
                  : sTRK5=hf2
  
                  : sNOTE=
  
                  :
  
  encoded_by      : SoundDev: MixPre-10T QD031734201
  
  originator_reference: USSDVQD0317342017190822DQR000101
  
  date            : 2019-08-22
  
  creation_time   : 13:26:54
  
  time_reference  : 0
  
  coding_history  : A=PCM,F=48000,W=24,M=multi,R=48000,T=4 Ch
  
                  :
  
  Duration: 00:32:19.35, bitrate: 4608 kb/s
  
  Stream #0:0: Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 4.0, s32 (24 bit), 4608 kb/s
  
  [AVFilterGraph @ 000002293f28d500] No output pad can be associated to link label 'MixHf'.
  
  Error initializing complex filters.
  
  Invalid argument

• Serving rtmp on port 1935

  22 mai 2020, par JJ The Second

  I've been trying to get ffmpeg to stream in rtmp but connection to port 1935 is always refused. I really don't know what else I can do to allow this connection.

  



  Here is what specs I'm running.

  



  

  • Ubuntu 18.04 (tried with 19.04) however same issue - here is why I think I've made a mistake

  


  • No Nginx installation at the moment

  


  • FFMPEG "ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)"

  


  



  This is the script I run :

  



  ffmpeg -i "test.mp4" -c:v copy -c:a copy -f flv "rtmp://127.0.0.1/stream/test"


  



  Error I get is :

  



  [tcp @ 0x55ff05ab8ce0] Connection to tcp://127.0.0.1:1935 failed: Connection refused


  



  I've done some research and been across many posts about ffserver.conf and I have made those changes but still no luck. Here is my config file. I also have ran ffserver once using this config.

  



  &#xA;&#xA;&#xA;HTTPPort 8090&#xA;HTTPBindAddress 127.0.0.1&#xA;MaxHTTPConnections 2000&#xA;MaxClients 1000&#xA;MaxBandwidth 1000&#xA;CustomLog -&#xA;&#xA;<feed>&#xA;&#xA;File /tmp/feed1.ffm&#xA;FileMaxSize 200K&#xA;&#xA;# Only allow connections from localhost to the feed.&#xA;ACL allow 127.0.0.1&#xA;ACL allow localhost     &#xA;ACL allow 192.168.0.0 192.168.255.255&#xA;</feed>&#xA;&#xA;<stream>&#xA;&#xA;# coming from live feed &#x27;feed1&#x27;&#xA;Feed feed1.ffm&#xA;&#xA;Format mpeg&#xA;AudioBitRate 32&#xA;&#xA;# Number of audio channels: 1 = mono, 2 = stereo&#xA;AudioChannels 2&#xA;AudioSampleRate 44100&#xA;&#xA;# Bitrate for the video stream&#xA;VideoBitRate 64&#xA;&#xA;# Ratecontrol buffer size&#xA;VideoBufferSize 40&#xA;&#xA;# Number of frames per second&#xA;VideoFrameRate 3&#xA;&#xA;&#xA;</stream>&#xA;&#xA;&#xA;<stream>&#xA;Feed feed1.ffm&#xA;Format asf&#xA;VideoFrameRate 15&#xA;VideoSize 352x240&#xA;VideoBitRate 256&#xA;VideoBufferSize 40&#xA;VideoGopSize 30&#xA;AudioBitRate 64&#xA;StartSendOnKey&#xA;</stream>&#xA;&#xA;# Special streams&#xA;&#xA;# Server status&#xA;&#xA;<stream>&#xA;Format status&#xA;&#xA;ACL allow localhost&#xA;ACL allow 127.0.0.1&#xA;ACL allow 192.168.0.0 192.168.255.255&#xA;&#xA;#FaviconURL http://pond1.gladstonefamily.net:8080/favicon.ico&#xA;</stream>&#xA;&#xA;<redirect>&#xA;URL http://www.ffmpeg.org/&#xA;</redirect>&#xA;

  



  Here is my ufw status :

  



  --                         ------      ----
22/tcp                     ALLOW       Anywhere
22                         ALLOW       Anywhere
1935/tcp                   ALLOW       Anywhere
22/tcp (v6)                ALLOW       Anywhere (v6)
22 (v6)                    ALLOW       Anywhere (v6)
1935/tcp (v6)              ALLOW       Anywhere (v6)


  



  but still nothing, I've also opened ports in iptables but no luck. Here is how this is done :

  



  iptables -A INPUT -m state --state NEW -m tcp -p tcp --dport 1935 -j ACCEPT

and

iptables -A OUTPUT -m state --state NEW -m tcp -p tcp --dport 1935 -j ACCEPT


  



  and still nothing, every time I run ffmpeg I get connection refused. I have previously installed nginx just to test but no luck.

  



  What am I doing wrong here ? Isn't this port suppose to be open now ?

  



  Thanks