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• jPlayer - notworking on IE

  8 juillet 2014, par Deepak Suvarna

  I’m developing an application of video playlist. I could make it run for Chrome, FireFox, Safari(Though starts late), Android and iOS, but could not make it work on IE. I have put my chunk of code on jsFiddle for you guys.

  <code>http://jsfiddle.net/8g5F8/21/
  

  One thing which make me worried is, if you click on another video in same playlist, they works on IE but not mine. I am clueless about it. Am I converting wrong way or something ? What is correct way of conversion etc

  Using : PHP, FFMPEG, JPlayer

• FFmpeg libraries : Exactly constant segment duration for HLS

  25 août 2015, par user2677612

  We are using FFmpeg libraries git-ee94362 libavformat v55.2.100.
  Our purpose is to mux two streams (video and audio) into M3U8 playlist using HLS.
  In addition, we want the duration of every TS segment file be exactly 3.0 sec (frame rate is 25 fps).

  To reach it, we are trying to set several options and properties, namely :
   segment_time
  
   keyint_min
   scenechange_threshold
   gop_size
   force_key_frames.

  And our code looks as below :

  AVCodecContext *codec_ctx = NULL;
  
  AVFormatContext *ofmt_ctx = NULL;
  
  
  
  int ret = 0, gopSize = (int)(3.0 * 25);   // 3 sec * 25 fps
  
  
  
  // ofmt_ctx and codec_ctx initialization and filling are OK, but: 
  
  codec_ctx->time_base.num = 1;
  
  codec_ctx->time_base.den = 25 // fps
  
  
  
  // It seems, that the following three lines have no effect without explisit setting of the "hls_time" property
  
  codec_ctx->keyint_min = gopSize;       // in FFMpeg application, the corresponding option is "-keyint_min 3"
  
  codec_ctx->scenechange_threshold = 0;  // in FFMpeg application, the corresponding option is "-sc_threshold 0"
  
  codec_ctx->gop_size = gopSize;         // in FFMpeg application, the corresponding option is "-g 3"
  
  
  
  ret = av_opt_set_double(ofmt_ctx, "hls_time", 3.0, AV_OPT_SEARCH_CHILDREN);
  
  
  
  // Any of the following lines causes "Option not found" error.
  
  ret = av_opt_set(codec_ctx->priv_data, "profile", "main", AV_OPT_SEARCH_CHILDREN);
  
  ret = av_opt_set(codec_ctx->priv_data, "preset", "ultrafast", AV_OPT_SEARCH_CHILDREN);
  
  ret = av_opt_get(ofmt_ctx, "segment_time",  AV_OPT_SEARCH_CHILDREN, &str);
  
  ret = av_opt_set((ofmt_ctx, "segment_time", "3.0", AV_OPT_SEARCH_CHILDREN);

  Anyway, the TS files durations are different, ( 2-3 sec), and not EXACTLY 3.0 sec.
  Our question : What is the best way to solve the problem ?

  Andrey Mochenov.

• FFmpeg : HLS options cannot be set/get/find

  4 septembre 2013, par user2677612

  We are using FFmpeg libraries git-ee94362 libavformat v55.2.100.
  We are trying to write a simple HLS code example based on muxing.c standard one.
  Let be two input streams, video and audio (they can be synthetic, doesn't matter).
  Our purpose is to mux them into M3U8 playlist using HLS.
  Suppose, duration of every TS segment file be 3 sec, and the desirable maximum number of entries in M3U8 output file be 100.

  From the FFmpeg application sources, one can see that the Apple HTTP Live Streaming segmenter implemented in hlsenc.c file.
  And the relevant options there are, as well : "hls_list_size", "hls_time", etc.
  The problem is that we have not succeeded to set/get/find these options in a conventional way, as shown in the following code :

  ---

  // Here is a part of main() program
  
  
  
  int64_t i1 = 0;
  
  void *target_obj;
  
  
  
  AVFormatContext *ofmt_ctx = NULL;
  
  AVOutputFormat *ofmt = NULL;
  
  
  
  avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, "Example_Out.m3u8");
  
  
  
  ofmt = ofmt_ctx->oformat;
  
  
  
  // The relevant options ("hls_list_size", "hls_time") are located under ofmt->priv_class->option.
  
  // But AVClass *priv_class is not the first member of the AVOutputFormat.
  
  // So, due to the documentation, av_opt_find...(), av_opt_get...() and av_opt_set...() 
  
  // cannot be used for options within AVOutputFormat.
  
  // In practice, any of the following three lines causes exception.
  
  const AVOption *o = av_opt_find2(ofmt, "hls_list_size", NULL, 0, AV_OPT_SEARCH_CHILDREN, &target_obj);
  
  av_opt_get_int(ofmt, "hls_list_size", AV_OPT_SEARCH_CHILDREN, &i1);
  
  av_opt_set_int(ofmt, "hls_list_size", 10, AV_OPT_SEARCH_CHILDREN);

  ---

  Our question : If there is a way to overcome the problem, i.e. to set/get/find options for AVOutputFormat, like for AVCodecContext (for example) ?

  Thank you,

  Andrey Mochenov.