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• How to insert infinite audio into the live streaming by using ffmpeg ?

  20 juillet 2017, par Xiang Wang

  I use the following command to insert infinite audio into rtsp stream, but -stream_loop -1 didn’t work. How to fix it ?

  ffmpeg -i rtsp://admin:12345@192.168.31.104/h264/ch1/main/av_stream  -stream_loop -1 -i blank.aac  -vcodec libx264 -acodec aac -f flv rtmp://localhost/live/test

  This is the full console when I executed the following command :

  ffmpeg -i "rtsp://admin:admin@192.168.31.140:554/cam/realmonitor?channel=1&subtype=0" -f lavfi -i anullsrc -vcodec libx264 -acodec aac -f flv rtmp://live.lamp.mowainfo.com:11935/live/test
  
  
  
  mowa@OpenWRT-Dev:~$ ffmpeg -i "rtsp://admin:admin@192.168.31.140:554/cam/realmonitor?channel=1&subtype=0" -f lavfi -i anullsrc -vcodec libx264 -acodec aac -f flv rtmp://live.lamp.mowainfo.com:11935/live/test
  
  ffmpeg version N-86764-ga824685 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
  
    configuration: --enable-nonfree --enable-gpl --enable-libx264 --enable-zlib
  
    libavutil      55. 67.100 / 55. 67.100
  
    libavcodec     57.100.104 / 57.100.104
  
    libavformat    57. 75.100 / 57. 75.100
  
    libavdevice    57.  7.100 / 57.  7.100
  
    libavfilter     6. 95.100 /  6. 95.100
  
    libswscale      4.  7.101 /  4.  7.101
  
    libswresample   2.  8.100 /  2.  8.100
  
    libpostproc    54.  6.100 / 54.  6.100
  
  Guessed Channel Layout for Input Stream #0.1 : mono
  
  Input #0, rtsp, from 'rtsp://admin:admin@192.168.31.140:554/cam/realmonitor?channel=1&subtype=0':
  
    Metadata:
  
      title           : RTSP Session/2.0
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: h264 (Main), yuv420p(progressive), 1280x720, 25.08 tbr, 90k tbn, 180k tbc
  
      Stream #0:1: Audio: pcm_alaw, 8000 Hz, mono, s16, 64 kb/s
  
  Input #1, lavfi, from 'anullsrc':
  
    Duration: N/A, start: 0.000000, bitrate: 705 kb/s
  
      Stream #1:0: Audio: pcm_u8, 44100 Hz, stereo, u8, 705 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
    Stream #1:0 -> #0:1 (pcm_u8 (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  [rtsp @ 0x23d0520] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
  
  [libx264 @ 0x244d200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0x244d200] profile High, level 3.1
  
  [libx264 @ 0x244d200] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, flv, to 'rtmp://live.lamp.mowainfo.com:11935/live/test':
  
    Metadata:
  
      title           : RTSP Session/2.0
  
      encoder         : Lavf57.75.100
  
      Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p, 1280x720, q=-1--1, 25.08 fps, 1k tbn, 25.08 tbc
  
      Metadata:
  
        encoder         : Lavc57.100.104 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
      Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, stereo, fltp, 128 kb/s
  
      Metadata:
  
        encoder         : Lavc57.100.104 aac
  
  Past duration 0.642738 too large   13286kB time=00:03:50.22 bitrate= 472.8kbits/s dup=0 drop=4 speed=0.985x    

• ffmpeg concat error-unusual video

  19 juillet 2017, par Samhita vempatti

  I have been trying to concatenate two 48 seconds video bits to one using the following command

      ffmpeg -f concat -safe 0 -i C:\moviepy-master\concat.txt -c copy output.mp4

  When I played it using Windows media player the first 48 second plays fine but the player closes before playing the second bit .

  Then I tried to play it using VLC media player but in the second bit player but the audio and video are not in sync .

  Then I also tried giving inputs separately so the following error shows up

              C:\Users\SAMHITA VVNK>ffmpeg -f concat -safe 0 -i C:\moviepy-master\extract1.mp4
  
               -i C:\moviepy-master\extract2.mp4 -c copy -flags +global_header output.mp4
  
              ffmpeg version N-86723-g3b3501f Copyright (c) 2000-2017 the FFmpeg developers
  
                built with gcc 7.1.0 (GCC)
  
                configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --e
  
              nable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --
  
              enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv
  
              --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-li
  
              bfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug -
  
              -enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enabl
  
              e-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-li
  
              bsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolam
  
              e --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
  
               --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable
  
              -libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
  
                libavutil      55. 67.100 / 55. 67.100
  
                libavcodec     57.100.103 / 57.100.103
  
                libavformat    57. 75.100 / 57. 75.100
  
                libavdevice    57.  7.100 / 57.  7.100
  
                libavfilter     6. 94.100 /  6. 94.100
  
                libswscale      4.  7.101 /  4.  7.101
  
                libswresample   2.  8.100 /  2.  8.100
  
                libpostproc    54.  6.100 / 54.  6.100
  
              C:\moviepy-master\extract1.mp4: Invalid data found when processing input

  These are the input file’s specifications are as follows
  C :\Users\SAMHITA VVNK>ffmpeg -i C :\moviepy-master\extract.mp4 -filter_complex "[
  0:v]setpts=0.5*PTS[v] ;[0:a]atempo=2.0" -map "[a]" extract1fast.mp4

      C:\Users\SAMHITA VVNK>ffmpeg -i C:\moviepy-master\extract2.mp4 -i C:\moviepy-mas
  
      ter\extract1.mp4
  
      ffmpeg version N-86723-g3b3501f Copyright (c) 2000-2017 the FFmpeg developers
  
        built with gcc 7.1.0 (GCC)
  
        configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --e
  
      nable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --
  
      enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv
  
      --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-li
  
      bfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug -
  
      -enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enabl
  
      e-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-li
  
      bsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolam
  
      e --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
  
       --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable
  
      -libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
  
        libavutil      55. 67.100 / 55. 67.100
  
        libavcodec     57.100.103 / 57.100.103
  
        libavformat    57. 75.100 / 57. 75.100
  
        libavdevice    57.  7.100 / 57.  7.100
  
        libavfilter     6. 94.100 /  6. 94.100
  
        libswscale      4.  7.101 /  4.  7.101
  
        libswresample   2.  8.100 /  2.  8.100
  
        libpostproc    54.  6.100 / 54.  6.100
  
      Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\moviepy-master\extract2.mp4':
  
        Metadata:
  
          major_brand     : isom
  
          minor_version   : 512
  
          compatible_brands: isomiso2avc1mp41
  
          encoder         : Lavf57.56.101
  
        Duration: 00:00:49.00, start: 0.012993, bitrate: 785 kb/s
  
          Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yu
  
      v420p(tv, smpte170m/smpte170m/bt709), 640x360, 668 kb/s, 29.97 fps, 29.97 tbr, 1
  
      1988 tbn, 23976 tbc (default)
  
          Metadata:
  
            handler_name    : VideoHandler
  
          Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp,
  
       137 kb/s (default)
  
          Metadata:
  
            handler_name    : SoundHandler
  
      Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\moviepy-master\extract1.mp4':
  
        Metadata:
  
          major_brand     : isom
  
          minor_version   : 512
  
          compatible_brands: isomiso2avc1mp41
  
          encoder         : Lavf57.56.101
  
        Duration: 00:00:49.00, start: 0.012993, bitrate: 526 kb/s
  
          Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 640x360 [
  
      SAR 1:1 DAR 16:9], 462 kb/s, 24.86 fps, 24.86 tbr, 19888 tbn, 49.72 tbc (default
  
      )
  
          Metadata:
  
            handler_name    : VideoHandler
  
          Stream #1:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, flt
  
      p, 95 kb/s (default)
  
          Metadata:
  
            handler_name    : SoundHandler

• Overlay Image on moving object in Video (Argumented Reality / OpenCv)

  30 juillet 2017, par Karandeep Atwal

  I am using FFmpeg to overlay image/emoji on video by this command -

  "-i "+inputfilePath+" -filter_complex "+"[0][1]overlay=enable='between(t,"+startTime+","+endTime+")'[v1]"+" -map [v0] -map 0:a "+OutputfilePath;  

  But above command only overlay image over video and stays still.

  In Instagram and Snapchat there is New pin feature. I want exactly same ,eg blur on moving faces or as in below videos -

  

  Here is link.

  Is it possible via FFmpeg ?

  I think someone with OPENCV or Argumented Reality knowledge can help in this. It is quiet similar to AR as we need to move/zoom emoji exactly where we want to on video/live cam.