Recherche avancée

Sur d’autres sites (11297)

• Can someone give a clue with those errors from gcc ?

  17 mars 2020, par GiuTor

  I have this code :

  #include 
  
  #include 
  
  #include <libavcodec></libavcodec>avcodec.h>
  
  #include <libavutil></libavutil>opt.h>
  
  #include <libavformat></libavformat>avformat.h>
  
  
  
  int main(int argc, char **argv)
  
  {
  
      avcodec_register_all();
  
      av_register_all();
  
  
  
      struct AVCodecTag * const *avctag;
  
      AVOutputFormat *outputFormat = NULL;
  
  
  
      const char *file = "file.mp4";
  
      outputFormat = av_guess_format(0, file, 0);
  
  
  
      if( ! outputFormat)
  
      {
  
          printf ("No container found\n");
  
          exit (1);
  
      }
  
      printf("%s %d\n",outputFormat->long_name,outputFormat->video_codec);
  
  
  
      avctag = outputFormat->codec_tag[0];
  
      printf("%d\n",avctag->id);
  
  }

  The compiler gives this weird error even though I used the -> in the printf line :

  error: ‘*avctag’ is a pointer; did you mean to use ‘->’?
  
    printf("%d\n",avctag->id);

  But it gives also a warning :

  warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
  
    avctag = outputFormat->codec_tag;

  AVOutputFormat:codec_tag is defined according to the docs as :

  struct AVCodecTag * const *

  That is exactly as I defined the pointer above. Can someone give me a clue why I get the warning and the error ?

  Many thanks

• AAC bitstream not in ADTS format and extradata missing

  14 août 2014, par Boehmi

  With FFMPEG, I’m sending a stream from Computer A over to Computer B, via UDP.
  This is done over a MPEGTS stream, encoded with libx264 and aac.
  Computer B takes this stream with FFMPEG and puts it into an m3u8 playlist.

  After a random time (2-35 minutes), the message

  [mpegts @ 0533f000] AAC bitstream not in ADTS format and extradata missing
  
  av_interleaved_write_frame(): Invalid data found when processing input

  appears.
  What I figures is that the receiving FFMPEG can’t read the header file of the audio part for this particular package, and since it can’t put video and audio together anymore, it stops creating the .ts files and just stops running.

  Here’s the cmdline of the receiving stream :

  ffmpeg -i udp://address -vcodec copy -acodec copy -map 0 -f segment -segment_list playlist.m3u8 -analyzeduration 100000 -probesize 100000-segment_list_flags +lis-Þcache -segment_time 8 -segment_wrap 10 out%03d.ts

  Now I need to know the answer to either one of these 2 questions :

  1) Can I put something in my commandline in order to avoid this particular problem or

  2) Can I tell FFMPEG to just ignore it for this particular message, quite possibly creating weird audio or none at all, and to simply move on to the next one ?

• FFmpeg 'setpts=PTS-STARTPTS' cannot work on Android(ARM)

  12 octobre 2017, par Jerikc XIONG

  I use the following command on Android :

  ffmpeg -loglevel 56 -i test.mp4 -vf [0:v]setpts=PTS-STARTPTS[fg] -c:a copy out.mp4 -y

  But it’s failed and I got the following logs :

  N:0 PTS:0 T:0.000000 POS:3848 INTERLACED:0 -> PTS:0 T:nan

  So i add some logs into static int filter_frame(AVFilterLink *inlink, AVFrame *frame) in the libavfilter/setpts.c :

  av_log(inlink->dst, AV_LOG_TRACE, " -> PTS%"PRId64", d:%s timebase:%f, AV_NOPTS_VALUE:%"PRId64 ", AV_NOPTS_VALUE==0?%d:, d == AV_NOPTS_VALUE?%d, TS2T:%f, :%f\n", frame->pts, d2istr(d), av_q2d(inlink->time_base), AV_NOPTS_VALUE, val == 0, d == AV_NOPTS_VALUE, d*av_q2d(inlink->time_base), (double)(0)*0.000078);

  I got the logs :

  -> PTS0, d:0 timebase:0.000011, AV_NOPTS_VALUE:-9223372036854775808, AV_NOPTS_VALUE==0?0:, d == AV_NOPTS_VALUE?0, TS2T:nan, :0.000000

  It’s weird. I always get nan by the TS2T.

  It’s OK on MacBook Pro (Retina, 13-inch, Early 2015) with 2.7 GHz Intel Core i5 when i build the same source code.

  PS :

  #define TS2T(ts, tb) ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts)*av_q2d(tb))

  I added the full log here.