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• Video file is hanging after concatenating video files and drawtext to output

  12 avril 2019, par elzix88

  I’m trying to concat 3 video files and add text to output using ffmpeg.
  Each part is 10 sec long.

  I’ve end up with this code :

  ffmpeg -i output3.mp4 -i output2.mp4 -i output1.mp4 -filter_complex "[0:v:0][0:a:0][1:v:0][1:a:0][2:v:0][2:a:0]concat=n=3:v=1:a=1[v][a]; [0:v:0]drawtext=fontfile=tahoma.ttf:text=Sample text:fontcolor=white:fontsize=40:box=1:boxcolor=black@0.7:boxborderw=5:x=100:y=100" -map "[v]" -map "[a]" output.mp4

  The result video has 30 seconds but it hangs after 1st part (10s). When I remove drawtext filter part (just concat), then video is fine, but without text...
  Anyone can help ?

• FFMPEG av_read_frame() return an I/O error (-5) ?

  7 mars 2019, par vominhtien961476

  I’m using ffmpeg library to capture screen (desktop). Everything works fine when I run my app in debug/release mode. The I/O error comes when this app run in c# window service mode (win 10 OS). I googled but still don’t know why the error come. In the service mode there is no problem when connecting to some rtsp link (Camera) except desktop capture.

  AVInputFormat * pAVInputFormat = av_find_input_format("gdigrab"); 
  
  if (pAVInputFormat != NULL) 
  
  { 
  
     int err = avformat_open_input(&pFormatCtx, "desktop", pAVInputFormat, NULL); 
  
     if(err== 0) 
  
     { 
  
        err = av_read_frame(&pFormatCtx, &packet); 
  
        if (err < 0) 
  
        { 
  
            char errs[AV_ERROR_MAX_STRING_SIZE]; 
  
            av_make_error_string(errs, AV_ERROR_MAX_STRING_SIZE, err ); 
  
            String^ errStr = gcnew String(errs); 
  
            WriteLog("Error in function av_read_frame() return = " + errStr); 
  
            return -1; 
  
       } 
  
     } 
  
  }

  ---

• libavformat/mpegtsenc : allow to set service_type in sdt

  2 février 2015, par dhead666

  libavformat/mpegtsenc : allow to set service_type in sdt
  This adds an option to set the service type in mpegts as defined in ETSI 300 468.
  I added what I believe are the most useful service types as pre defined values,
  
  the others can be sent by using their hexdecimal form directly (e.g. -mpegts_service_type digital_radio, -mpegts_service_type 0x07).
  I’ve been using this patch in order to pipe internet radio stream (originally as HLS/m3u8) from ffmpeg to tvheadend,
  
  when the service type set right tvheadend recognize the mpegts stream as a radio channel.
  The patch in its original form was written by linuxstb from freenode’s hts channel which allowed me pushing it upstream.
  This close issue 4118.
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] doc/muxers.texi
  • [DH] libavformat/mpegtsenc.c