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• 'Could find no file' error

  15 octobre 2015, par Brooks

  This is my command :

  "C:\...\ffmpeg.exe" -i "C:\...\audio.mp3" -r 1 -i "C:\...\%%d5.jpg" -qscale:v 1 -shortest ^
  
    -s:v 1280x720 -y -r 30 -pix_fmt yuv420p -filter_complex "[0:a]volume=1[aout]" ^
  
    -map 1:v -map "[aout]" "C:\...\video1.mp4"

  This is the error I get everytime :

  

  I’ve searched and found various answers so I tried with %%d5 %%5d %d5 %5d with no luck.
  My files are named 00000.jpg, 00001.jpg ..., 00005.jpg.

• 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.

• FFMPEG Live Stream Capturing : Any option to find stream is down ?

  27 octobre 2015, par Naeem Ur Rehman

  I am capturing live video stream using ffmpeg through the following command :

  ffmpeg -re -i STREAM_URL -t 3600 c :/test.mp4

  Is there any opetion in ffmpeg that generate a message whenever the stream is down