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• Multi bitrate live HLS with FFmpeg on Windows

  16 mai 2014, par Nioreh

  I am trying to encode a live stream into Apple HLS for iPhone on windows. I was looking at different options and wowza can do it, but doesn’t support CDN distribution of HLS as far as I can see. Plus it costs a lot of money.

  What I did find was this site : http://www.espend.de/artikel/iphone-ipad-ipod-http-streaming-segmenter-and-m3u8-windows.html

  I can now set up a single bitrate stream easily, but my goal is an adapive multi-bitrate live stream. Is it possible ? For VOD content it can easily be accomplished with creating the different qualities then linking to them in a new m3u8, but how would this be done in live ?

  I can of course set up three quality live streams and link to them in an m3u8, but how will I get them GOP-aligned in this case ?

  My initial thought was to have one ffmpeg instance create all qualities and re-stream those outputs to new ffmpeg-instances that just remux and pipe to the segmenter. But I would need some way of streaming locally between instances. Can that be done ?

  If anyone has a nice solution to this, or can link to other software capable of live HLS on windows, I would appreciate any input.

  Have a great day !
  Regards
  Carl

• FFMPEG permission in windows wamp

  15 octobre 2011, par shababhsiddique

  I am trying to build a video sharing site using drupal 6. One of the modules i am using is ffmpeg , it requires me to set a ffmpeg binary file location . I downloaded ffmpeg from here

  http://ffmpeg.arrozcru.org/autobuilds/ffmpeg/mingw32/static/

  I placed it on C :\ffmpeg\bin\ffmpeg.exe and gave this path with the slashes changed to /

  it got the encoders information .. but i cant test it. It shows a message like

  Fmpeg failed to create an output file. This could be due to permission problems or an error from the encoding settings.

  I found that i need permission. How do i set permission ? i am using wamp on windows. Please help urgent.

• YUY2 image ==>>sws_scale ==>>x264_encoder_encode doesn't work in Windows

  8 décembre 2011, par shiju sasi

  I have a multi media app in Windows using x264 built using MSYS-MingW and ffmpeg Windows binaries. This works for most of the cameras which capture data in RGB24 and RGB32 formats in most of the OSes. But when I tested the app on a Windows 7 (64 bit OS) Sony Vaio Laptop which has an integrated webcam capturing in YUY2 format, the x264_enoder_encode crashes. The sws_scale to convert the YUY2 data to YUV420 Planar any way works fine here too and returns proper stride values. Please check the relevant code fragments that I have attached below.

       x264_param_apply_profile(&m_param, "baseline");
  
         m_pEncoder = x264_encoder_open(&m_param);
  
         x264_encoder_parameters(m_pEncoder,&m_param);
  
  
  
         m_encoderConvertCtx = sws_getContext(g_iWidth, g_iHeight, PIX_FMT_YUYV422, SCALE_WIDTH, SCALE_HEIGHT, PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL);
  
  
  
         x264_picture_t m_pic_in, m_pic_out;   //X264 picture variables to get the X264 encoded picture out.
  
         x264_picture_init(&m_pic_in);
  
   m_pic_in.i_type = X264_CSP_I420;
  
  
  
   x264_nal_t*  m_nals;
  
  
  
  
  
   srcstride = g_iWidth * 2;  //For YUYV422 Packed
  
  
  
   AVFrame* pictIn;
  
   AVFrame* pictOut;
  
  
  
   int iInBytes = avpicture_get_size(PIX_FMT_YUV420P, SCALE_WIDTH, SCALE_HEIGHT); 
  
   uint8_t* outbuffer = (uint8_t*)av_malloc(iInBytes); 
  
   pictOut = avcodec_alloc_frame(); 
  
  
  
   avpicture_fill((AVPicture*)pictOut, outbuffer, PIX_FMT_YUV420P, SCALE_WIDTH, SCALE_HEIGHT); 
  
  
  
   sws_scale(m_encoderConvertCtx, &in_buf, &srcstride, 0, g_iHeight, pictOut->data, pictOut->linesize); //Scale from YUYV422 Packed to YUV420 Plane
  
  
  
  
  
  ///Code after Scale begins
  
  
  
  memcpy(m_pic_in.img.plane[0],pictOut->data[0],SCALE_WIDTH * SCALE_HEIGHT);
  
  memcpy(m_pic_in.img.plane[1],pictOut->data[1],SCALE_WIDTH * SCALE_HEIGHT/4);
  
  memcpy(m_pic_in.img.plane[2],pictOut->data[2],SCALE_WIDTH * SCALE_HEIGHT/4);
  
  m_pic_in.img.plane[3] = 0; 
  
  
  
  for(int iPlane = 0; iPlane < 3; iPlane++)
  
  {
  
   m_pic_in.img.i_stride[iPlane] = pictOut->linesize[iPlane];
  
  }
  
  m_pic_in.img.i_stride[3] = 0;
  
  
  
  int frame_size = x264_encoder_encode(m_pEncoder, &m_nals, &i_nals, &m_pic_in, &m_pic_out);

  Please help if possible, as this has been consuming a lot of time at my end. But I am not able to dig in to the library side for debugging. Any experienced hands are requested to assist.