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• ffmpeg used vda from os x

  13 mai 2014, par user2618420

  I try to enable hardware decoding project earlier decoded using ffmpeg

  ffmpeg has support in hard-copy decoding
  Here documentation kotoroya I did https://github.com/dilaroga/ffmpeg-vda/wiki/FFmpeg-vda-usage
  my code

  enum AVPixelFormat myGetFormatCallback(struct AVCodecContext *ctx, const enum AVPixelFormat * fmt)
  
  {
  
      struct vda_context *vda_ctx;
  
      vda_ctx = (struct vda_context *)malloc(sizeof(vda_context));
  
      vda_ctx->decoder = NULL;
  
      vda_ctx->width = ctx->width;
  
      vda_ctx->height = ctx->height;
  
      vda_ctx->format = 'avc1';
  
      vda_ctx->use_ref_buffer = 1;
  
      switch (ctx->pix_fmt) {
  
          case PIX_FMT_UYVY422:{
  
              vda_ctx->cv_pix_fmt_type = '2vuy';
  
              break;
  
          }
  
          case PIX_FMT_YUYV422:{
  
              vda_ctx->cv_pix_fmt_type = 'yuvs';
  
              break;
  
          }
  
          case PIX_FMT_NV12:{
  
              vda_ctx->cv_pix_fmt_type = '420v';
  
              break;
  
          }
  
          case PIX_FMT_YUV420P:{
  
              vda_ctx->cv_pix_fmt_type = 'y420';
  
              break;
  
          }
  
          default:{
  
              av_log(ctx, AV_LOG_ERROR, "Unsupported pixel format: %d\n", ctx->pix_fmt);
  
              Logger::debug(LOG_LEVEL_ERROR, "Unsupported pixel format: %d", ctx->pix_fmt);
  
              throw AbstractException("Unsupported pixel format");
  
          }
  
       }
  
      int status = ff_vda_create_decoder(vda_ctx, (unsigned char*)ctx->extradata,ctx->extradata_size);
  
      if (status){
  
          Logger::debug(LOG_LEVEL_ERROR, "Error create VDA decoder");
  
          throw AbstractException("Error create VDA decoder");
  
      }else{
  
          ctx->hwaccel_context = vda_ctx;
  
      }
  
  
  
      return ctx->pix_fmt;
  
  }
  
  
  
  static void release_vda_context(void *opaque, uint8_t *data)
  
  {
  
      vda_buffer_context *vda_context = (vda_buffer_context *)opaque;
  
      av_free(vda_context);
  
  }
  
  
  
  int myGetBufferCallback(struct AVCodecContext *s, AVFrame *av_frame, int flags)
  
  {
  
      vda_buffer_context *vda_context = (vda_buffer_context *)av_mallocz(sizeof(*vda_context));
  
      AVBufferRef *buffer = av_buffer_create(NULL, 0, release_vda_context, vda_context, 0);
  
  
  
      if( !vda_context || !buffer )
  
      {
  
          av_free(vda_context);
  
          return -1;
  
      }
  
  
  
      av_frame->buf[0] = buffer;
  
      av_frame->data[0] = (uint8_t*)1;
  
      return 0;
  
  }
  
  
  
  
  
  static void release_buffer(struct AVCodecContext *opaque, AVFrame *pic)
  
  {
  
      vda_buffer_context *context = (vda_buffer_context*)opaque;
  
      CVPixelBufferUnlockBaseAddress(context->cv_buffer, 0);
  
      CVPixelBufferRelease(context->cv_buffer);
  
      av_free(context);
  
  }
  
  
  
  main(){
  
      //init ff context
  
      if (avcodec_open2(mCodecContext, mCodec, NULL) < 0) throw AbstractException("Unable to open codec");
  
  
  
      mCodecContext->get_format = myGetFormatCallback;
  
      mCodecContext->get_buffer2 = myGetBufferCallback;
  
      mCodecContext->release_buffer = release_buffer;
  
  }

  but I did not myGetFormatCallback the method is called, and called myGetBufferCallback falls
  why not called myGetFormatCallback ? what’s wrong ? may not work well at all

• Extract audio from video in mp3 format using android-ffmpeg-library

  28 mai 2014, par user2870161

  I want extrat audio from any type of video file and save it in mp3 format using android-ffmpeg-library.

  My most of work is done here i am create wav file using this code but problame is when i create mp3 file it make only 0kb file in sdcard.

  I hope I’ve made myself clear, and thanks for taking the time to read this.

      if (inputPath == null || outputPath == null) {
  
          throw new IllegalStateException("Need an input and output filepath!");
  
      }   
  
  
  
      final List<string> cmd = new LinkedList<string>();
  
  
  
  
  
      String baseDir = Environment.getExternalStorageDirectory().getAbsolutePath();
  
      String fileName = "3.mp4";
  
      String fileName1 = "2.mp3";
  
  
  
      String path  = baseDir + "/" + fileName;
  
      String path1  = baseDir + "/" + fileName1;
  
  
  
        File f = new File(path);
  
  
  
        if(f.exists()){
  
            System.out.println("File existed");
  
        }else{
  
            System.out.println("File not found!");
  
        }
  
  
  
        cmd.add(mFfmpegPath);
  
        cmd.add("-i");
  
        cmd.add(path);
  
  
  
        cmd.add("-vn");
  
        cmd.add("-acodec");
  
        cmd.add("copy");
  
  
  
        cmd.add(path1);
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
      final ProcessBuilder pb = new ProcessBuilder(cmd);
  
      return new ProcessRunnable(pb);
  
  </string></string>

• Transcode Adobe Media Encoder live stream using FFMPEG in node.js

  23 juin 2014, par user2757842

  I am using Adobe media live encoder to send a stream up to the adobe media server. What I would like to do is take that stream and transcode it to a local file on my machine in another format other that .f4m

  Here is the code I have so far, it is built using FFmpeg within a node.js app :

  var ffmpeg = require('fluent-ffmpeg');
  
  var fs = require('fs');
  
  
  
  //make sure you set the correct path to your video file
  
  var inStream = fs.createReadStream('rtmp://localhost/livepkgr/livestream live=1'); // this is where the streams are stored
  
  var command = new ffmpeg({ source: inStream});
  
  
  
  //Set the path to where FFmpeg is installed
  
  command.setFfmpegPath("C:\\Users\\Jay\\Documents\\FFMPEG\\bin\\ffmpeg.exe");
  
  
  
  command
  
  //set the size
  
  .withSize('100%')
  
  
  
  // set fps
  
  .withFps(24)
  
  
  
  // set output format to force
  
  .toFormat('ismv')
  
  
  
  // setup event handlers
  
  .on('end', function() {
  
      console.log('file has been converted successfully');
  
  })
  
  .on('error', function(err) {
  
      console.log('an error happened: ' + err.message);
  
  })
  
  // save to file <-- the new file I want -->
  
  .saveToFile('rtmp://localhost/livepkgr/livestream1'); //this is where i want to store the newly converted stream

  I have it working with a local file but when I try it with my live stream, I get this error

  events.js:72
  
          throw er; // Unhandled 'error' event
  
                ^
  
  Error: ENOENT, open 'C:\Users\Jay\workspace\FFMPEGtest\rtmp:\localhost\livepkgr\livestream live=1'

  Anyone seen this before ?