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• Netflix neutrality

  31 mai 2014, par Mans — Law and liberty

  In the net neutrality debate, a rarely mentioned aspect is the widespread practice amongst ISPs of over-subscribing bandwidth. Before streaming video became readily available and popular, this was viable, even reasonable, since few users managed to actually saturate their links for extended periods of time. Now that customers are suddenly … Continue reading →

• Using ffmpeg to mix two rtmp streams gives av_interleaved_write_frame() : Operation not permitted

  9 février 2014, par yazan jaber

  Using ffmpg I'm trying to mix an rtmp stream containing only audio data and another rtmp stream containing only video data then publish again to rtmp server. It works for a few seconds then I get av_interleaved_write_frame(): Operation not permitted Any idea what is wrong and how can I fix it ?
  Also I'm using RED5 for streaming.

     E:\Everything\ffmpeg\ffmpeg-20140207-git-9707b53-win64-static\bin>ffmpeg -i "rtm
  
      p://localhost:1935/oflaDemo/s2 live=1" -i "rtmp://localhost:1935/oflaDemo/s3 liv
  
      e=1" -codec:v copy  -codec:a copy  -f flv rtmp://localhost:1935/oflaDemo/s4
  
      ffmpeg version N-60393-g9707b53 Copyright (c) 2000-2014 the FFmpeg developers
  
        built on Feb  6 2014 22:07:13 with gcc 4.8.2 (GCC)
  
        configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
      isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
      le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
      e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
      ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
      ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
      eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aa
  
      cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavp
  
      ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
        libavutil      52. 63.101 / 52. 63.101
  
        libavcodec     55. 49.101 / 55. 49.101
  
        libavformat    55. 30.100 / 55. 30.100
  
        libavdevice    55.  7.100 / 55.  7.100
  
        libavfilter     4.  1.102 /  4.  1.102
  
        libswscale      2.  5.101 /  2.  5.101
  
        libswresample   0. 17.104 /  0. 17.104
  
        libpostproc    52.  3.100 / 52.  3.100
  
      rtmp server sent error
  
      rtmp server sent error
  
      Input #0, flv, from 'rtmp://localhost:1935/oflaDemo/s2 live=1':
  
        Duration: N/A, start: 2006.595000, bitrate: N/A
  
          Stream #0:0: Audio: nellymoser, 22050 Hz, mono, flt
  
      rtmp server sent error
  
      rtmp server sent error
  
      Input #1, flv, from 'rtmp://localhost:1935/oflaDemo/s3 live=1':
  
        Duration: N/A, start: 0.000000, bitrate: N/A
  
          Stream #1:0: Video: flv1, yuv420p, 320x240, 15 tbr, 1k tbn, 1k tbc
  
      Output #0, flv, to 'rtmp://localhost:1935/oflaDemo/s4':
  
        Metadata:
  
          encoder         : Lavf55.30.100
  
          Stream #0:0: Video: flv1 ([2][0][0][0] / 0x0002), yuv420p, 320x240, q=2-31,
  
      1k tbn, 1k tbc
  
          Stream #0:1: Audio: nellymoser ([6][0][0][0] / 0x0006), 22050 Hz, mono
  
      Stream mapping:
  
        Stream #1:0 -> #0:0 (copy)
  
        Stream #0:0 -> #0:1 (copy)
  
      Press [q] to stop, [?] for help
  
      frame=   82 fps=0.0 q=-1.0 size=      78kB time=00:33:43.67 bitrate=   0.3kbits/
  
      frame=   88 fps= 87 q=-1.0 size=      81kB time=00:33:44.14 bitrate=   0.3kbits/
  
      frame=   96 fps= 63 q=-1.0 size=      84kB time=00:33:44.66 bitrate=   0.3kbits/
  
      frame=  102 fps= 50 q=-1.0 size=      87kB time=00:33:45.14 bitrate=   0.4kbits/
  
      frame=  110 fps= 43 q=-1.0 size=      90kB time=00:33:45.67 bitrate=   0.4kbits/
  
      frame=  117 fps= 39 q=-1.0 size=      93kB time=00:33:46.14 bitrate=   0.4kbits/
  
      frame=  124 fps= 35 q=-1.0 size=      96kB time=00:33:46.67 bitrate=   0.4kbits/
  
      frame=  132 fps= 33 q=-1.0 size=      99kB time=00:33:47.21 bitrate=   0.4kbits/
  
      frame=  138 fps= 30 q=-1.0 size=     102kB time=00:33:47.67 bitrate=   0.4kbits/
  
      frame=  146 fps= 29 q=-1.0 size=     106kB time=00:33:48.20 bitrate=   0.4kbits/
  
      WriteN, RTMP send error 10053 (140 bytes)
  
      WriteN, RTMP send error 10053 (37 bytes)
  
      WriteN, RTMP send error 10038 (42 bytes)
  
      av_interleaved_write_frame(): Operation not permitted
  
      frame=  149 fps= 28 q=-1.0 Lsize=     125kB time=00:33:48.41 bitrate=   0.5kbits
  
      /s
  
      video:541kB audio:84kB subtitle:0 data:0 global headers:0kB muxing overhead -79.
  
      973789%

• FFMPEG stops converting

  19 février 2014, par user3328745

  I've got Ubuntu 12.04 LTS, which runs Wowza Media Server, so I use FFmpeg as a transcoder for live streaming and JWplayer on my website. But ffmpeg always stops converting, and I have to input the command again and again. So here is the command :

  nohup ffmpeg -i rtsp://log:pass@<cameraip>:554/live1.sdp -ar 44100 -ab 128k -f flv -b 5000k -s 480x270 -y rtmp://<serverip>:1935/live/camera.stream &amp;
  
  </serverip></cameraip>

  And that's what i get

  ffmpeg version 0.8.10-4:0.8.10-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers
  
    built on Feb  6 2014 20:56:59 with gcc 4.6.3
  
  *** THIS PROGRAM IS DEPRECATED ***
  
  This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
  
  [rtsp @ 0x25317a0] Estimating duration from bitrate, this may be inaccurate
  
  
  
  Seems stream 0 codec frame rate differs from container frame rate: 150.00 (150/1) -> 1000.00 (1000/1)
  
  Input #0, rtsp, from &#39;rtsp://log:pass@<cameraip>:554/live1.sdp&#39;:
  
    Metadata:
  
      title           : RTSP/RTP stream 1 from DCS-2132L
  
      comment         : live1.sdp with v2.0
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0.0: Video: h264 (High), yuvj420p, 640x360 [PAR 1:1 DAR 16:9], 75 fps, 1k tbr, 90k tbn, 150 tbc
  
      Stream #0.1: Audio: pcm_mulaw, 8000 Hz, 1 channels, s16, 64 kb/s
  
  Incompatible pixel format &#39;yuvj420p&#39; for codec &#39;mpeg4&#39;, auto-selecting format &#39;yuv420p&#39;
  
  [buffer @ 0x2539f80] w:640 h:360 pixfmt:yuvj420p
  
  [scale @ 0x253a940] w:640 h:360 fmt:yuvj420p -> w:480 h:270 fmt:yuv420p flags:0x4
  
  Incompatible sample format &#39;s16&#39; for codec &#39;ac3&#39;, auto-selecting format &#39;flt&#39;
  
  [ac3 @ 0x2531120] channel_layout not specified
  
  [ac3 @ 0x2531120] No channel layout specified. The encoder will guess the layout, but it might be incorrect.
  
  [ac3 @ 0x2531120] invalid bit rate
  
  Output #0, avi, to &#39;rtmp://<serverip>:1935/live/camera.stream&#39;:
  
      Stream #0.0: Video: mpeg4, yuv420p, 480x270 [PAR 1:1 DAR 16:9], q=2-31, 1024 kb/s, 90k tbn, 1k tbc
  
      Stream #0.1: Audio: ac3, 22050 Hz, mono, flt, 1024 kb/s
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
    Stream #0.1 -> #0.1
  
  Error while opening encoder for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  </serverip></cameraip>

  Plese, help me to correct the errors