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• how to play video with an Image onit in ffmpeg [closed]

  22 mai 2020, par Naveen Kumar

  https://i.stack.imgur.com/Yqt2i.jpg

  



  Need to play a video with an image over it in ffmpeg

  



  i have tried

  



  ffmpeg -i s.mp4 -i l.png -filter_complex 'overlay=10:main_h-overlay_h-10' avi - | ffplay -


  



  but giving "Error initializing complex filters" even though i am using exact sysntax in ffmpeg documentation

  



  ---

  



  ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9.2.1 (GCC) 20200122
  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-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  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
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
ffplay version 4.2.2 Copyright (c) 2003-2019 the FFmpeg developers
  built with gcc 9.2.1 (GCC) 20200122
  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-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  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
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 's.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2020-01-19T02:20:09.000000Z
  Duration: 00:00:05.29, start: 0.000000, bitrate: 1252 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 1120 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata:
      creation_time   : 2020-01-19T02:20:09.000000Z
      handler_name    : ISO Media file produced by Google Inc. Created on: 01/18/2020.
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      creation_time   : 2020-01-19T02:20:09.000000Z
      handler_name    : ISO Media file produced by Google Inc. Created on: 01/18/2020.    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0
Input #1, png_pipe, from 'l.png':  0KB vq=    0KB sq=    0B f=0/0
  Duration: N/A, bitrate: N/A
    Stream #1:0: Video: png, rgba(pc), 2000x2000 [SAR 3779:3779 DAR 1:1], 25 tbr, 25 tbn, 25 tbc
[AVFilterGraph @ 000001584ea4c180] No such filter: 'overlay=10:main_h-overlay_h-10'
Error initializing complex filters.
Invalid argument
pipe:: Invalid data found when processing input


  


• Problems with frame rate on video conversion using ffmpeg with libx264 [migrated]

  29 mai 2013, par Lars Schroeter

  I have problems with transcoding some videos. I ran the most simple ffmpeg command and it takes very long time and the output file is about 10 times bigger. If I provide the frame rate parameter -r it works well (small file, fast transcoding). What is the problem and how can I solve it ? I don't want to set a fixed frame rate because I guess it's better to leave it the same as source, isn't it ?.

  Maybe the problem is something else, because I found many examples in web where the -r option isn't used. Also transcoding to a different format or with a different source works well without -r option (I tried with ffmpeg 0.7.15 and also 1.2.1). The videos are provided by the users of my website and automatically converted to be suitable for the web. So I need the most general command for automatic conversion.

  In the following ffmpeg output you will find this two suspicious messages :

  • Frame rate very high for a muxer not effciciently supporting it. Please consider specifiying a lower framerate, a different muxer or -vsync 2
  • MB rate (36000000) > level limit (983040)

  The ffmpeg command and output (without -r option) :

      ffmpeg -i '/tmp/standort_aquarium.mp4' -vcodec libx264 output.mp4
  
      ffmpeg version 0.7.15, Copyright (c) 2000-2013 the FFmpeg developers  built on Feb 22 2013 07:18:58 with gcc 4.4.5  configuration : —enable-libdc1394 —prefix=/usr —extra-cflags='-Wall -g ' —cc='ccache cc' —enable-shared —enable-libmp3lame —enable-gpl —enable-libvorbis —enable-pthreads —enable-libfaac —enable-libxvid —enable-postproc —enable-x11grab —enable-libgsm —enable-libtheora —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libx264 —enable-libspeex —enable-nonfree —disable-stripping —enable-avfilter —enable-libdirac —disable-decoder=libdirac —enable-libfreetype —enable-libschroedinger —disable-encoder=libschroedinger —enable-version3 —enable-libopenjpeg —enable-libvpx —enable-librtmp —extra-libs=-lgcrypt —disable-altivec —disable-armv5te —disable-armv6 —disable-vis
  
        libavutil    50. 43. 0 / 50. 43. 0
  
        libavcodec   52.123. 0 / 52.123. 0
  
        libavformat  52.111. 0 / 52.111. 0
  
        libavdevice  52.  5. 0 / 52.  5. 0
  
        libavfilter   1. 80. 0 /  1. 80. 0
  
        libswscale    0. 14. 1 /  0. 14. 1
  
        libpostproc  51.  2. 0 / 51.  2. 0
  
      Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/tmp/standort_aquarium.mp4' :
  
        Metadata :
  
          major_brand : mp42
  
          minor_version : 0
  
          compatible_brands : mp423gp4isom
  
          creation_time : 2013-04-19 15:04:05
  
        Duration : 00:00:18.24, start : 0.000000, bitrate : 2095 kb/s
  
          Stream #0.0(und) : Video : mpeg4, yuv420p, 640x480 [PAR 1:1 DAR 4:3], 2001 kb/s, 14.97 fps, 30k tbr, 30k tbn, 30k tbc
  
          Metadata :
  
            creation_time : 2013-04-19 15:04:05
  
          Stream #0.1(und) : Audio : aac, 48000 Hz, mono, s16, 96 kb/s
  
          Metadata :
  
            creation_time : 2013-04-19 15:04:05
  
      File 'output.mp4' already exists. Overwrite ? [y/N] y
  
      [mp4 @ 0x20eed80] Frame rate very high for a muxer not effciciently supporting it.
  
      Please consider specifiying a lower framerate, a different muxer or -vsync 2
  
      [buffer @ 0x20f8820] w:640 h:480 pixfmt:yuv420p tb:1/1000000 sar:1/1 sws_param :
  
      [libx264 @ 0x20efde0] Default settings detected, using medium profile
  
      [libx264 @ 0x20efde0] using SAR=1/1
  
      [libx264 @ 0x20efde0] MB rate (36000000) > level limit (983040)
  
      [libx264 @ 0x20efde0] using cpu capabilities : MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
  
      [libx264 @ 0x20efde0] profile High, level 5.1
  
      [libx264 @ 0x20efde0] 264 - core 118 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - 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=1 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, mp4, to 'output.mp4' :
  
        Metadata :
  
          major_brand : mp42
  
          minor_version : 0
  
          compatible_brands : mp423gp4isom
  
          creation_time : 2013-04-19 15:04:05
  
          encoder : Lavf52.111.0
  
          Stream #0.0(und) : Video : libx264, yuv420p, 640x480 [PAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 30k tbn, 30k tbc
  
          Metadata :
  
            creation_time : 2013-04-19 15:04:05
  
          Stream #0.1(und) : Audio : libfaac, 48000 Hz, mono, s16, 64 kb/s
  
          Metadata :
  
            creation_time : 2013-04-19 15:04:05
  
      Stream mapping :
  
        Stream #0.0 -> #0.0
  
        Stream #0.1 -> #0.1
  
      Press [q] to stop, [?] for help
  
      frame=542630 fps=132 q=33.0 Lsize=   77226kB time=00:00:18.08 bitrate=34976.2kbits/s dup=542358 drop=0
  
      video:68604kB audio:143kB global headers:0kB muxing overhead 12.333275%
  
      frame I:2174  Avg QP:18.72  size : 25040
  
      [libx264 @ 0x20efde0] frame P:136846 Avg QP:25.27  size :    56
  
      [libx264 @ 0x20efde0] frame B:403610 Avg QP:32.99  size :    20
  
      [libx264 @ 0x20efde0] consecutive B-frames :  0.8%  0.0%  0.1% 99.1%
  
      [libx264 @ 0x20efde0] mb I  I16..4 :  5.5% 83.3% 11.1%
  
      [libx264 @ 0x20efde0] mb P  I16..4 :  0.0%  0.0%  0.0%  P16..4 :  0.5%  0.0%  0.0%  0.0%  0.0%    skip:99.4%
  
      [libx264 @ 0x20efde0] mb B  I16..4 :  0.0%  0.0%  0.0%  B16..8 :  0.0%  0.0%  0.0%  direct : 0.0%  skip:100.0%  L0:21.2% L1:78.8% BI : 0.0%
  
      [libx264 @ 0x20efde0] 8x8 transform intra:83.1% inter:85.2%
  
      [libx264 @ 0x20efde0] coded y,uvDC,uvAC intra : 91.2% 95.8% 80.7% inter : 0.0% 0.1% 0.0%
  
      [libx264 @ 0x20efde0] i16 v,h,dc,p : 13% 40% 12% 35%
  
      [libx264 @ 0x20efde0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu : 19% 34% 15%  4%  4%  5%  6%  7%  8%
  
      [libx264 @ 0x20efde0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu : 20% 38%  6%  4%  6%  6%  8%  6%  6%
  
      [libx264 @ 0x20efde0] i8c dc,h,v,p : 39% 32% 19% 10%
  
      [libx264 @ 0x20efde0] Weighted P-Frames : Y:0.0% UV:0.0%
  
      [libx264 @ 0x20efde0] ref P L0 : 91.5%  5.2%  2.8%  0.4%  0.0%
  
      [libx264 @ 0x20efde0] ref B L0 : 55.7% 43.5%  0.8%
  
      [libx264 @ 0x20efde0] ref B L1 : 97.9%  2.1%
  
      [libx264 @ 0x20efde0] kb/s:31071.04
  

  The ffmpeg command and output with the -r 24 option :

      ffmpeg -i '/tmp/standort_aquarium.mp4' -r 30000/1001 -vcodec libx264 output.mp4
  
      ffmpeg version 0.7.15, Copyright (c) 2000-2013 the FFmpeg developers
  
        built on Feb 22 2013 07:18:58 with gcc 4.4.5
  
        configuration : —enable-libdc1394 —prefix=/usr —extra-cflags='-Wall -g ' —cc='ccache cc' —enable-shared —enable-libmp3lame —enable-gpl —enable-libvorbis —enable-pthreads —enable-libfaac —enable-libxvid —enable-postproc —enable-x11grab —enable-libgsm —enable-libtheora —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libx264 —enable-libspeex —enable-nonfree —disable-stripping —enable-avfilter —enable-libdirac —disable-decoder=libdirac —enable-libfreetype —enable-libschroedinger —disable-encoder=libschroedinger —enable-version3 —enable-libopenjpeg —enable-libvpx —enable-librtmp —extra-libs=-lgcrypt —disable-altivec —disable-armv5te —disable-armv6 —disable-vis
  
        libavutil    50. 43. 0 / 50. 43. 0
  
        libavcodec   52.123. 0 / 52.123. 0
  
        libavformat  52.111. 0 / 52.111. 0
  
        libavdevice  52.  5. 0 / 52.  5. 0
  
        libavfilter   1. 80. 0 /  1. 80. 0
  
        libswscale    0. 14. 1 /  0. 14. 1
  
        libpostproc  51.  2. 0 / 51.  2. 0
  
      Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/tmp/standort_aquarium.mp4' :
  
        Metadata :
  
          major_brand : mp42
  
          minor_version : 0
  
          compatible_brands : mp423gp4isom
  
          creation_time : 2013-04-19 15:04:05
  
        Duration : 00:00:18.24, start : 0.000000, bitrate : 2095 kb/s
  
          Stream #0.0(und) : Video : mpeg4, yuv420p, 640x480 [PAR 1:1 DAR 4:3], 2001 kb/s, 14.97 fps, 30k tbr, 30k tbn, 30k tbc
  
          Metadata :
  
            creation_time : 2013-04-19 15:04:05
  
          Stream #0.1(und) : Audio : aac, 48000 Hz, mono, s16, 96 kb/s
  
          Metadata :
  
            creation_time : 2013-04-19 15:04:05
  
      File 'output.mp4' already exists. Overwrite ? [y/N] y
  
      [buffer @ 0x132e820] w:640 h:480 pixfmt:yuv420p tb:1/1000000 sar:1/1 sws_param :
  
      [libx264 @ 0x1325de0] Default settings detected, using medium profile
  
      [libx264 @ 0x1325de0] using SAR=1/1
  
      [libx264 @ 0x1325de0] using cpu capabilities : MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
  
      [libx264 @ 0x1325de0] profile High, level 3.0
  
      [libx264 @ 0x1325de0] 264 - core 118 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - 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=1 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, mp4, to 'output.mp4' :
  
        Metadata :
  
          major_brand : mp42
  
          minor_version : 0
  
          compatible_brands : mp423gp4isom
  
          creation_time : 2013-04-19 15:04:05
  
          encoder : Lavf52.111.0
  
          Stream #0.0(und) : Video : libx264, yuv420p, 640x480 [PAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 30k tbn, 29.97 tbc
  
          Metadata :
  
            creation_time : 2013-04-19 15:04:05
  
          Stream #0.1(und) : Audio : libfaac, 48000 Hz, mono, s16, 64 kb/s
  
          Metadata :
  
            creation_time : 2013-04-19 15:04:05
  
      Stream mapping :
  
        Stream #0.0 -> #0.0
  
        Stream #0.1 -> #0.1
  
      Press [q] to stop, [?] for help
  
      frame=  542 fps= 36 q=29.0 Lsize=    2059kB time=00:00:18.01 bitrate= 936.3kbits/s dup=270 drop=0
  
      video:1904kB audio:143kB global headers:0kB muxing overhead 0.609224%
  
      frame I:3     Avg QP:22.39  size : 14773
  
      [libx264 @ 0x1325de0] frame P:514   Avg QP:23.98  size :  3675
  
      [libx264 @ 0x1325de0] frame B:25    Avg QP:27.44  size :   643
  
      [libx264 @ 0x1325de0] consecutive B-frames : 93.7%  0.0%  1.1%  5.2%
  
      [libx264 @ 0x1325de0] mb I  I16..4 : 16.4% 78.3%  5.3%
  
      [libx264 @ 0x1325de0] mb P  I16..4 :  1.6%  6.3%  0.3%  P16..4 : 30.8%  8.6%  3.1%  0.0%  0.0%    skip:49.4%
  
      [libx264 @ 0x1325de0] mb B  I16..4 :  0.4%  0.7%  0.0%  B16..8 : 13.2%  1.6%  0.2%  direct : 0.3%  skip:83.6%  L0:50.0% L1:47.1% BI : 2.9%
  
      [libx264 @ 0x1325de0] 8x8 transform intra:77.1% inter:83.1%
  
      [libx264 @ 0x1325de0] coded y,uvDC,uvAC intra : 62.0% 76.4% 24.4% inter : 17.9% 26.3% 2.3%
  
      [libx264 @ 0x1325de0] i16 v,h,dc,p : 14% 60% 13% 13%
  
      [libx264 @ 0x1325de0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu : 15% 35% 33%  2%  3%  3%  3%  3%  4%
  
      [libx264 @ 0x1325de0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu : 15% 40% 12%  4%  7%  7%  7%  5%  4%
  
      [libx264 @ 0x1325de0] i8c dc,h,v,p : 46% 34% 16%  4%
  
      [libx264 @ 0x1325de0] Weighted P-Frames : Y:8.0% UV:4.5%
  
      [libx264 @ 0x1325de0] ref P L0 : 65.6% 16.7%  8.8%  7.9%  0.9%
  
      [libx264 @ 0x1325de0] ref B L0 : 85.9% 13.3%  0.8%
  
      [libx264 @ 0x1325de0] ref B L1 : 88.7% 11.3%
  
      [libx264 @ 0x1325de0] kb/s:862.28
  

  The video source is temporarily available under : https://www.dropbox.com/s/4xg147z77u40g87/standort_aquarium.mp4

• Streaming live video with avconv/ffmped on nginx rtmp server player error

  6 juin 2014, par user3715403

  Good morning,
  My current project involves playing live video (testing using a usb webcam for now). I compiled and installed nginx server with the rtmp module (obtained from https://github.com/arut/nginx-rtmp-module). The nginx configuration file is as :

  worker_processes  1;
  
  
  
  error_log  logs/error.log debug;
  
  
  
  events {
  
      worker_connections  1024;
  
  }
  
  
  
  rtmp {
  
      server {
  
          listen 1935;
  
  
  
          application myapp {
  
              live on;
  
  
  
              #record keyframes;
  
              #record_path /tmp;
  
              #record_max_size 128K;
  
              #record_interval 30s;
  
              #record_suffix .this.is.flv;
  
  
  
              #on_publish http://localhost:8080/publish;
  
              #on_play http://localhost:8080/play;
  
              #on_record_done http://localhost:8080/record_done;
  
          }
  
      }
  
  }
  
  
  
  http {
  
      server {
  
          listen      8080;
  
  
  
          location /stat {
  
              rtmp_stat all;
  
              rtmp_stat_stylesheet stat.xsl;
  
          }
  
  
  
          location /stat.xsl {
  
              root /path/to/nginx-rtmp-module/;
  
          }
  
  
  
          location /control {
  
              rtmp_control all;
  
          }
  
  
  
          #location /publish {
  
          #    return 201;
  
          #}
  
  
  
          #location /play {
  
          #    return 202;
  
          #}
  
  
  
          #location /record_done {
  
          #    return 203;
  
          #}
  
  
  
          location /rtmp-publisher {
  
              root /path/to/nginx-rtmp-module/test;
  
          }
  
  
  
          location / {
  
              root /path/to/nginx-rtmp-module/test/www;
  
          }
  
      }
  
  }

  The command line to start streaming is as :

  avconv -s vga -f video4linux2 -i /dev/video0 -vcodec libx264 -an -f flv -b 800k -r 30 rtmp://localhost/myapp/live

  While streaming, the following stats are displayed :

  avconv version 10.1, Copyright (c) 2000-2014 the Libav developers
  
    built on May 13 2014 15:13:23 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  
  [video4linux2 @ 0x2f06220] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, video4linux2, from '/dev/video0':
  
    Duration: N/A, start: 112393.305806, bitrate: 73728 kb/s
  
      Stream #0.0: Video: rawvideo, yuyv422, 640x480, 73728 kb/s, 15 fps, 1000k tbn
  
  [libx264 @ 0x2f187a0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
  
  [libx264 @ 0x2f187a0] profile High, level 3.0
  
  [libx264 @ 0x2f187a0] 264 - core 120 r2151 a3f4407 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - 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=1 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=abr mbtree=1 bitrate=800 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, flv, to 'rtmp://localhost/myapp/live':
  
    Metadata:
  
      encoder         : Lavf55.12.0
  
      Stream #0.0: Video: libx264, yuv420p, 640x480, q=-1--1, 800 kb/s, 1k tbn, 30 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo -> libx264)
  
  Press ctrl-c to stop encoding
  
  frame= 3283 fps= 30 q=26.0 size=   10592kB time=108.33 bitrate= 810.5kbits/s

  Before embedding the stream onto a web page using, say videojs, I am using avplay which returns the error : rtmp ://localhost/myapp/live : Input/output error while VLC returns the error
  Your input can’t be opened :
  VLC is unable to open the MRL ’rtmp ://localhost/myapp/live’. Check the log for details.

  Any suggestions about what would cause the errors displayed by VLC/avplay ?

  Thanks
  Daniel