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• ffmpeg send udp stream

  26 avril 2017, par Luzwitz

  I stream my screen and i want send stream on a server with udp.

  So, I have this command :

  ffmpeg -ss 00:00:00 -s 1920x1080 -f x11grab -i :0.0+0,0 -copyts -vf "scale=-1:min(ih*1920/iw\,1080),pad=1920:1080:(1920-iw)/2:(1080-ih)/2:black" -c:v libvpx -b:v 4M -crf 16 -quality realtime -cpu-used 8 -c:a libvorbis -f webm udp://127.0.0.1:8080

  And server in C :

  int sock, clientlen, n, port = 8080;
  
  char buf[1024], *host;
  
  
  
  FILE *file;
  
  
  
  struct sockaddr_in serveraddr;
  
  struct sockaddr_in clientaddr;
  
  struct hostent *hostp;
  
  
  
  sock = socket(AF_INET, SOCK_DGRAM, 0);
  
  
  
  bzero((char *) &serveraddr, sizeof(serveraddr));
  
  
  
  serveraddr.sin_family = AF_INET;
  
  serveraddr.sin_addr.s_addr = htonl(INADDR_ANY);
  
  serveraddr.sin_port = htons((unsigned short)port);
  
  
  
  if(bind(sock, (struct sockaddr *) &serveraddr, sizeof(serveraddr)) < 0) 
  
      clientlen = sizeof(clientaddr);
  
  
  
  file = fopen("out.webm", "wb"));
  
  
  
  printf("En attente de données...\n");
  
  
  
  while(1)
  
  {
  
      bzero(buf, 1024);
  
  
  
      n = recvfrom(sock, buf, 1024, 0, (struct sockaddr *) &clientaddr, &clientlen);
  
  
  
      hostp = gethostbyaddr((const char *)&clientaddr.sin_addr.s_addr, sizeof(clientaddr.sin_addr.s_addr), AF_INET);
  
  
  
      host = inet_ntoa(clientaddr.sin_addr);
  
  
  
      fwrite(buf, n, 1, file);
  
  }

  And, when i play out.webm, i haven’t video.

• ffmpeg producing empty MP4 files

  3 mai 2017, par Joshua Dowell

  I am trying to use ffmpeg to convert MTS files to MP4 files. It seems as though the command is running correctly, but the resulting files end up being empty.

  joshua@joshua-VirtualBox:~$ ffmpeg -i /media/sf_2017-04/SD_044/00007.MTS /media/sf_2017-04/SD_04/000007.mp4
  
  ffmpeg version 0.8.17-4:0.8.17-0ubuntu0.12.04.2, Copyright (c) 2000-2014 the Libav developers
  
    built on Apr  1 2016 14:28:02 with gcc 4.6.3
  
  The ffmpeg program is only provided for script compatibility and will be removed
  
  in a future release. It has been deprecated in the Libav project to allow for
  
  incompatible command line syntax improvements in its replacement called avconv
  
  (see Changelog for details). Please use avconv instead.
  
  Input #0, mpegts, from '/media/sf_2017-04/SD_044/00007.MTS':
  
    Duration: 00:01:17.07, start: 1.927822, bitrate: 25053 kb/s
  
    Program 1 
  
      Stream #0.0[0x1011]: Video: h264 (High), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 59.96 fps, 59.94 tbr, 90k tbn, 119.88 tbc
  
      Stream #0.1[0x1100]: Audio: ac3, 48000 Hz, stereo, s16, 256 kb/s
  
      Stream #0.2[0x1200]: Data: [144][0][0][0] / 0x0090
  
  File '/media/sf_2017-04/SD_04/000007.mp4' already exists. Overwrite ? [y/N] y
  
  [buffer @ 0x88772a0] w:1920 h:1080 pixfmt:yuv420p
  
  ffmpeg -i /media/sf_2017-04/SD_044/00007.MTS /media/sf_2017-04/SD_04/000007.mp4
  
  ffmpeg version 0.8.17-4:0.8.17-0ubuntu0.12.04.2, Copyright (c) 2000-2014 the Libav developers
  
    built on Apr  1 2016 14:28:02 with gcc 4.6.3
  
  The ffmpeg program is only provided for script compatibility and will be removed
  
  in a future release. It has been deprecated in the Libav project to allow for
  
  incompatible command line syntax improvements in its replacement called avconv
  
  (see Changelog for details). Please use avconv instead.
  
  Input #0, mpegts, from '/media/sf_2017-04/SD_044/00007.MTS':
  
    Duration: 00:01:17.07, start: 1.927822, bitrate: 25053 kb/s
  
    Program 1 
  
      Stream #0.0[0x1011]: Video: h264 (High), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 59.96 fps, 59.94 tbr, 90k tbn, 119.88 tbc
  
      Stream #0.1[0x1100]: Audio: ac3, 48000 Hz, stereo, s16, 256 kb/s
  
      Stream #0.2[0x1200]: Data: [144][0][0][0] / 0x0090
  
  File '/media/sf_2017-04/SD_04/000007.mp4' already exists. Overwrite ? [y/N] y
  
  [buffer @ 0x88772a0] w:1920 h:1080 pixfmt:yuv420p
  
  encoder 'aac' is experimental and might produce bad results.
  
  Add '-strict experimental' if you want to use it.

• avcodec/dvdsubdec : Fix runtime error : left shift of 242 by 24 places cannot be repres...

  5 mai 2017, par Michael Niedermayer

  avcodec/dvdsubdec : Fix runtime error : left shift of 242 by 24 places cannot be represented in type 'int'
  Fixes : 1080/clusterfuzz-testcase-5353236754071552
  Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/dvdsubdec.c