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• Encoder (codec mp3) not found for output stream #0:0 , ffmpeg

  14 juillet 2014, par AreKay

  i am running ffmpeg on mac os x.
  while extracting audio file from a video i am getting an error as Encoder (codec mp3) not found for output stream #0:0

  this question was already asked but that was for ubuntu and i did try (using macports) port install libavcodec-extras-53 but it showed an error as libavcodec-extras-53 was not found.

  this was what came in terminal.

  Rajaths-MacBook-Pro:desktop RK$ ffmpeg -i 1.mp4 3.mp3<br />
ffmpeg version N-64663-ga65d6e1 Copyright (c) 2000-2014 the FFmpeg developers<br />
 built on Jul 15 2014 02:20:47 with Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM    3.4svn)<br />
 configuration:<br />
 libavutil      52. 92.100 / 52. 92.100<br />
 libavcodec     55. 69.100 / 55. 69.100<br />
 libavformat    55. 47.100 / 55. 47.100<br />
 libavdevice    55. 13.102 / 55. 13.102<br />
 libavfilter     4. 10.100 /  4. 10.100<br />
 libswscale      2.  6.100 /  2.  6.100<br />
 libswresample   0. 19.100 /  0. 19.100<br />
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mp4':<br />
 Metadata:<br />
   major_brand     : isom<br />
   minor_version   : 512<br />
   compatible_brands: isomiso2mp41<br />
   encoder         : Lavf55.47.100
 Duration: 00:00:39.05, start: 0.020227, bitrate: 408 kb/s<br />
   Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 274 kb/s, 30 fps, 30 tbr, 15360 tbn, 30 tbc (default)<br />
   Metadata:<br />
     handler_name    : VideoHandler<br />
   Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s        (default)<br />
   Metadata:<br />
     handler_name    : SoundHandler<br />
Output #0, mp3, to '3.mp3':<br />
 Metadata:<br />
   major_brand     : isom<br />
   minor_version   : 512<br />
   compatible_brands: isomiso2mp41<br />
   encoder         : Lavf55.47.100<br />
   Stream #0:0(und): Audio: mp3, 0 channels, 128 kb/s (default)<br />
   Metadata:<br />
     handler_name    : SoundHandler<br />
Stream mapping:<br />
 Stream #0:1 -> #0:0 (aac (native) -> ? (?))<br />
Encoder (codec mp3) not found for output stream #0:0

  any help would be appreciated.

• Progress with rtc.io

  12 août 2014, par silvia

  At the end of July, I gave a presentation about WebRTC and rtc.io at the WDCNZ Web Dev Conference in beautiful Wellington, NZ.

  

  Putting that talk together reminded me about how far we have come in the last year both with the progress of WebRTC, its standards and browser implementations, as well as with our own small team at NICTA and our rtc.io WebRTC toolbox.

  

  One of the most exciting opportunities is still under-exploited : the data channel. When I talked about the above slide and pointed out Bananabread, PeerCDN, Copay, PubNub and also later WebTorrent, that’s where I really started to get Web Developers excited about WebRTC. They can totally see the shift in paradigm to peer-to-peer applications away from the Server-based architecture of the current Web.

  Many were also excited to learn more about rtc.io, our own npm nodules based approach to a JavaScript API for WebRTC.

  

  We believe that the World of JavaScript has reached a critical stage where we can no longer code by copy-and-paste of JavaScript snippets from all over the Web universe. We need a more structured module reuse approach to JavaScript. Node with JavaScript on the back end really only motivated this development. However, we’ve needed it for a long time on the front end, too. One big library (jquery anyone ?) that does everything that anyone could ever need on the front-end isn’t going to work any longer with the amount of functionality that we now expect Web applications to support. Just look at the insane growth of npm compared to other module collections :

  

  For those that – like myself – found it difficult to understand how to tap into the sheer power of npm modules as a font end developer, simply use browserify. npm modules are prepared following the CommonJS module definition spec. Browserify works natively with that and “compiles” all the dependencies of a npm modules into a single bundle.js file that you can use on the front end through a script tag as you would in plain HTML. You can learn more about browserify and module definitions and how to use browserify.

  For those of you not quite ready to dive in with browserify we have prepared prepared the rtc module, which exposes the most commonly used packages of rtc.io through an “RTC” object from a browserified JavaScript file. You can also directly download the JavaScript file from GitHub.

  

  So, I hope you enjoy rtc.io and I hope you enjoy my slides and large collection of interesting links inside the deck, and of course : enjoy WebRTC ! Thanks to Damon, JEeff, Cathy, Pete and Nathan – you’re an awesome team !

  On a side note, I was really excited to meet the author of browserify, James Halliday (@substack) at WDCNZ, whose talk on “building your own tools” seemed to take me back to the times where everything was done on the command-line. I think James is using Node and the Web in a way that would appeal to a Linux Kernel developer. Fascinating !!

• file.mov : No such file or directory (Converting .mov to mp4)

  10 août 2014, par Dena

  I am trying to convert .mov files over to mp4 using ffmpeg however, I keep getting the error below within my terminal. Any ideas why ? I am new to rails so any help is appreciated. Thanks.

  Error

  Denas-MacBook-Pro:desktop Dena$ ffmpeg -i file.mov newfile.mp4
  
  **ffmpeg version 2.3.1** Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Aug  7 2014 16:08:43 with Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.3.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid --enable-libfreetype --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-aacenc --enable-libass --enable-ffplay --enable-libspeex --enable-libschroedinger --enable-libfdk-aac --enable-libopus --enable-frei0r --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags='-I/usr/local/Cellar/openjpeg/1.5.1_1/include/openjpeg-1.5 '
  
    libavutil      52. 92.100 / 52. 92.100
  
    libavcodec     55. 69.100 / 55. 69.100
  
    libavformat    55. 48.100 / 55. 48.100
  
    libavdevice    55. 13.102 / 55. 13.102
  
    libavfilter     4. 11.100 /  4. 11.100
  
    libavresample   1.  3.  0 /  1.  3.  0
  
    libswscale      2.  6.100 /  2.  6.100
  
    libswresample   0. 19.100 /  0. 19.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  file.mov: No such file or directory

  Path

  Denas-MacBook-Pro:desktop Dena$ which ffmpeg
  
  /usr/local/bin/ffmpeg

  Version

  Denas-MacBook-Pro:desktop Dena$ ffmpeg -version
  
  ffmpeg version 2.3.1 Copyright (c) 2000-2014 the FFmpeg developers
  
  built on Aug  7 2014 16:08:43 with Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)
  
  configuration: --prefix=/usr/local/Cellar/ffmpeg/2.3.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid --enable-libfreetype --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-aacenc --enable-libass --enable-ffplay --enable-libspeex --enable-libschroedinger --enable-libfdk-aac --enable-libopus --enable-frei0r --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags='-I/usr/local/Cellar/openjpeg/1.5.1_1/include/openjpeg-1.5 '
  
  libavutil      52. 92.100 / 52. 92.100
  
  libavcodec     55. 69.100 / 55. 69.100
  
  libavformat    55. 48.100 / 55. 48.100
  
  libavdevice    55. 13.102 / 55. 13.102
  
  libavfilter     4. 11.100 /  4. 11.100
  
  libavresample   1.  3.  0 /  1.  3.  0
  
  libswscale      2.  6.100 /  2.  6.100
  
  libswresample   0. 19.100 /  0. 19.100
  
  libpostproc    52.  3.100 / 52.  3.100