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• Using ffmpeg to merge two videos from online sources without downloading both ?

  18 juin 2014, par user3754017

  Im trying to merge two videos from that I found online into just one file to be downloaded to my pc. Im looking to do this without downloading the first and second video then merging them together. In addition to merging I also want to edit like the duration of the video that I want from the video I found online. Can I do this with just the url alone ?

• How to save data of packet.data using ffmpeg && c language ?

  12 juin 2015, par patrick

  I’m try to build an app in c that extract audio from video and save it as audio file. I’m able to extract the audio but now the problem is how to save it. I wrote the code given below but it’s giving me an segmentation fault. Thanks in advance.

  My code is :

  AVOutputFormat* fmt = av_guess_format("mp3", NULL, NULL);;
  
  AVFormatContext* oc = avformat_alloc_context();
  
  oc->oformat = fmt;
  
  avio_open2(&oc->pb, "test.mp3", AVIO_FLAG_WRITE,NULL,NULL);
  
  
  
  AVStream* stream=NULL;
  
  int cnt = 0;
  
  
  
  while(av_read_frame(pFormatCtx, &packet)>=0) { //pFormatCtx is input file format context.
  
      if (packet.stream_index==audioStream) {
  
      int got_frame = 0;
  
      if (avcodec_decode_audio4(pCodecCtx, pFrame, &got_frame, &packet) < 0) {
  
          fprintf(stderr, "Error encoding frame\n");
  
                  exit(1);
  
          }
  
  
  
          if(got_frame) {
  
          if (av_interleaved_write_frame(oc, &packet) < 0) {
  
                  printf(stderr, "Error writing frame\n");
  
                      exit(1);
  
                  }
  
          }
  
      }
  
      av_free_packet(&packet);
  
      av_init_packet(&packet);
  
  }

• online free media hosting for live streaming

  30 novembre 2013, par Abdul Ali

  wanted to ask two things :

  1- How can we put the output of FFMPEG to a stream (online address to put the stream).

  2- Is there any free service (for testing purpose) to use FFMPEG and pass the output to it for live streaming .

  apologies if am unable to explain properly what is intended.

  to summarize, wish to convert images to video using FFMPEG (have tried the image to video conversion locally and seems to be working) and put the output to an online resource for live streaming and possibly also have VOD (so users who later logon can view at least from some point behind which they have missed).

  regards,