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• I don't know the time unit to use for av_dict_set to set a timeout

  16 juin, par ICYMYM

  I am confused. I am using the av_dict_set function to set a time-out, but when I searched for information about av_dict_set, the time unit seems to be different. I don't know how to set it now. Can anyone help ?

  



  I found some code like the following :

  



  pFormatCtx = avformat_alloc_context();

av_dict_set(&opts, "rtsp_transport", "tcp", 0);
//av_dict_set(&opts, "timeout", "5000000", 0);
if(strncmp(stream_url, "rtmp:", sizeof("rtmp:")) == 0){
    av_dict_set(&opts, "timeout", "6", 0); // in secs
}
else if(strncmp(stream_url, "http:", sizeof("http:")) == 0){
    av_dict_set(&opts, "timeout", "6000", 0); // in ms
}

if(avformat_open_input(&pFormatCtx, stream_url, NULL, &opts)!=0)
{
  return 1;
}


  



  Maybe it should set the time unit according to the different protocols (http or rtsp).

  



  Is the code above right ?

  


• lavc/hevc : Don't parse NAL unit for a dummy buffer

  30 mars 2018, par Haihao Xiang

  lavc/hevc : Don't parse NAL unit for a dummy buffer
  hevc parser mistakenly reports the following message if a dummy buffer
  
  is padded for EOF
     [hevc @ 0x559b63848610] missing picture in access unit
  Signed-off-by : Haihao Xiang <haihao.xiang@intel.com>
  
  Reviewed-by : Steven Liu <lq@chinaffmpeg.org>
  
  Reviewed-by : "Li, Zhong" <zhong.li@intel.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/hevc_parser.c

• FFmpeg : Invalid NAL unit size after Concat filter

  12 juin 2019, par green_hat

  I am trying to concatenate 3 videos using Concat filter.
  The videos are :

  Video1

  Duration : 00:00:05.34, start : 0.000000, bitrate : 45584 kb/s
  Stream #0:0(eng) : Video : h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 45653 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)

  Video2

  Duration : 01:12:18.67, start : 0.000000, bitrate : 730 kb/s
  Stream #0:0(und) : Video : h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 704x352 [SAR 457:704 DAR 457:352], 599 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)

  Video3

  Duration : 00:00:10.02, start : 0.000000, bitrate : 25827 kb/s
  Stream #0:0(und) : Video : h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 25812 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)

  The ffmpeg command that I use is :

  ffmpeg -i video1.mp4 -i video2.mp4 -i video3.mp4 -filter_complex 
  
  "[0:v]scale=1920:1080:force_original_aspect_ratio=1,pad=1920:1080:(ow-iw)/2:(oh-ih)/2,setdar=16/9[v0];
  
  [1:v]scale=1920:1080:force_original_aspect_ratio=1,pad=1920:1080:(ow-iw)/2:(oh-ih)/2,setdar=16/9[v1]; 
  
  [2:v]scale=1920:1080:force_original_aspect_ratio=1,pad=1920:1080:(ow-iw)/2:(oh-ih)/2,setdar=16/9[v2];
  
  [v0][0:a][v1][1:a][v2][2:a] concat=n=3:v=1:a=1[v][a]" 
  
  -map "[v]" -map "[a]" output.mp4
  
  (I have tried also with force_original_aspect_ratio=decrease)

  However I get the following error

  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x55b7422ea700] stream 1, offset 0xbac62: partial files dup=2 drop=0 speed=0.989x
  
  [h264 @ 0x55b742be9a20] Invalid NAL unit size (110724 > 17746).
  
  [h264 @ 0x55b742be9a20] Error splitting the input into NAL units.
  
  video3.mp4: Invalid data found when processing input
  
  video3.mp4: Invalid data found when processing input
  
  Last message repeated 2 times
  
  Error while decoding stream #2:0: Invalid data found when processing input
  
  video3.mp4: Invalid data found when processing input
  
  Last message repeated 1 times

  and the output.mp4 is only video1+video2.

  BUT ! If I use a sample of video2.mp4 (for example the first 10 minutes of it), the ffmpeg command runs successfully till the end, generating the expected output (video1+video2+video3).

  Do you know why do I get this error and how could I cope with it ?

  UPDATE :
  My command works perfectly with a downgraded version of FFmpeg. Maybe there is a bug in the newest one ?