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• ffmpeg Unrecognized option 'hls_enc'

  16 juin 2017, par riubin

  Does anyone have a ffmpeg problem that Unrecognized option ’hls_enc’ ?

  when I use ffmpeg to convert videos to hls with option ’hls_enc’,followed the document : https://www.ffmpeg.org/ffmpeg-formats.html#Options-5
  but throw error:Unrecognized option ’hls_enc’

  Is it missing any configure options ?

  configuration : —enable-gpl —enable-nonfree —yasmexe=/data/ffmpeg.src/_release/bin/yasm —prefix=/data/ffmpeg.src/_release —cc= —enable-static —disable-shared —enable-debug —extra-cflags=’-I/data/ffmpeg.src/_release/include’ —extra-ldflags=’-L/data/ffmpeg.src/_release/lib -lm -ldl’ —enable-postproc —enable-bzlib —enable-zlib —enable-parsers —enable-pthreads —enable-libx264 —enable-libmp3lame —enable-libfdk_aac —enable-libspeex —extra-libs=-lpthread —enable-encoders —enable-decoders —enable-avfilter —enable-muxers —enable-demuxers

• Javascript, method chaining, how to realize response in callback ?

  12 avril 2017, par CHBS

  Good afternoon, ladies and gentlemen.
  I write for myself a module on node js, I can not implement the save () function

  module.exports = function(filename, callback){
  
      this.callback = callback(require(filename));
  
      return { 
  
          save: function() {
  
              console.log(this);
  
              //fs.writeFile(filename, 'Hello Node.js');
  
          }
  
      }; 
  
  }
  
  
  
  File('file.json', function(data){
  
      data['blablabla'] = 12345;
  
  }).save();

  How from a callback, to transfer the changed copy of a file in save (), and there already to save it through fs ?
  I’m interested in the implementation of the fluent-ffmpeg function save ()

  ffmpeg('/path/to/file.avi')
  
   .videoCodec('libx264')
  
   .audioCodec('libmp3lame')
  
   .size('320x240')
  
   .on('error', function(err) {
  
     console.log('An error occurred: ' + err.message);
  
   })
  
   .on('end', function() {
  
     console.log('Processing finished !');
  
   })
  
   .save('/path/to/output.mp4');

  And as well as implemented on() ?

  on('end'),   
  
  on('error'),   
  
  on('response'),

  I will be grateful for the information provided.

• Can the outputFile of MediaRecorder be a named pipe ?

  13 avril 2017, par Harrison

  Following
  Android Camera Capture using FFmpeg
  and
  feed raw yuv frame to ffmpeg with timestamp

  I successfully put raw frames of Android phone camera into a named pipe made by mkfifo, and used ffmpeg to process them and generated a video file.

  But the problem is that by ffmpeg, the encoding is very slow, it can only process 3 5 frames per second. The reason I have to use ffmpeg instead of MediaRecorder is that later I need to use ffmpeg to generate HLS segments and m3u8 file.

  So I have to turn to use native encoder like MediaRecorder and try to set its OutputFile to a named pipe following
  How to use unix pipes in Android

  My code likes this,

  private String pipe = "/data/data/com.example/v_pipe1";
  
  ...
  
  mMediaRecorder.setOutputFile(pipe);
  
  ...
  
  mMediaRecorder.start();

  Also I have a ffmpeg thread to use this pipe as the input.

  But when I call mMediaRecorder.start() ; It will throw java.lang.IllegalStateException. I’ve tried to put ffmpeg thread before or after calling mMediaRecorder.start(), but with the same error.

  I have no idea about this now. Could someone tell me how to solve this ?
  Any suggestions are welcome and appreciated. Thanks.