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• ffmpeg created timelapse won't play on other players than VLC

  27 février 2019, par theFeiter

  I am creating a Timelapse Video with the following ffmpeg command :

  ffmpeg -r 24 -start_number 7754 -i IMG_%d.JPG -pix_fmt yuv420p -s 1920x1080 Output.mp4

  This works without errors, but when I try to play the .mp4 on my Android Phone it shows an Error : "Unable to play file. Not enough resources"

  With the VLC App : "Currently unable to play this video. Stop the other video and try again"

  When I put the Video through Handbrake It plays fine on all players.

  I tried out changing some ffmpeg options, but nothing helped.

  When I compare the output of ffmpeg -i Output.mp4 from the original with the output from the video out of handbrake it differs only in the video bitrate.

  Are there any other options I can try to change ?

  This is the ffmpeg output :

  ffmpeg version 3.4.4-0ubuntu0.18.04.1 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
  
    configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  
    libavutil      55. 78.100 / 55. 78.100
  
    libavcodec     57.107.100 / 57.107.100
  
    libavformat    57. 83.100 / 57. 83.100
  
    libavdevice    57. 10.100 / 57. 10.100
  
    libavfilter     6.107.100 /  6.107.100
  
    libavresample   3.  7.  0 /  3.  7.  0
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
    libpostproc    54.  7.100 / 54.  7.100
  
  Input #0, image2, from 'PIC_%d.jpg':
  
    Duration: 00:00:02.24, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 720x1280 [SAR 1:1 DAR 9:16], 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [swscaler @ 0x56059fe911a0] deprecated pixel format used, make sure you did set range correctly
  
  [libx264 @ 0x56059f9b4180] using SAR=1/1
  
  [libx264 @ 0x56059f9b4180] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 0x56059f9b4180] profile High, level 3.1
  
  [libx264 @ 0x56059f9b4180] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=2 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'ttyffmpeg.mp4':
  
    Metadata:
  
      encoder         : Lavf57.83.100
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 720x1280 [SAR 1:1 DAR 9:16], q=-1--1, 2 fps, 16384 tbn, 2 tbc
  
      Metadata:
  
        encoder         : Lavc57.107.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  frame=   56 fps= 11 q=-1.0 Lsize=    5242kB time=00:00:26.50 bitrate=1620.4kbits/s speed=5.38x    
  
  video:5241kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.025511%
  
  [libx264 @ 0x56059f9b4180] frame I:9     Avg QP:14.75  size:111662
  
  [libx264 @ 0x56059f9b4180] frame P:35    Avg QP:17.14  size: 90885
  
  [libx264 @ 0x56059f9b4180] frame B:12    Avg QP:17.74  size: 98312
  
  [libx264 @ 0x56059f9b4180] consecutive B-frames: 62.5% 21.4% 16.1%  0.0%
  
  [libx264 @ 0x56059f9b4180] mb I  I16..4:  2.6% 96.8%  0.6%
  
  [libx264 @ 0x56059f9b4180] mb P  I16..4:  1.0% 93.5%  1.2%  P16..4:  1.6%  1.1%  0.4%  0.0%  0.0%    skip: 1.1%
  
  [libx264 @ 0x56059f9b4180] mb B  I16..4:  0.6% 66.7%  2.1%  B16..8: 10.1% 10.6%  3.0%  direct: 4.8%  skip: 2.0%  L0:35.3% L1:34.6% BI:30.0%
  
  [libx264 @ 0x56059f9b4180] 8x8 transform intra:97.3% inter:91.2%
  
  [libx264 @ 0x56059f9b4180] coded y,uvDC,uvAC intra: 94.3% 79.0% 44.3% inter: 77.2% 76.9% 31.3%
  
  [libx264 @ 0x56059f9b4180] i16 v,h,dc,p: 59% 25% 14%  2%
  
  [libx264 @ 0x56059f9b4180] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 18% 42%  3%  2%  2%  4%  4%  6%
  
  [libx264 @ 0x56059f9b4180] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 27% 10%  3%  5%  5%  8%  5%  7%
  
  [libx264 @ 0x56059f9b4180] i8c dc,h,v,p: 40% 24% 29%  7%
  
  [libx264 @ 0x56059f9b4180] Weighted P-Frames: Y:8.6% UV:5.7%
  
  [libx264 @ 0x56059f9b4180] ref P L0: 67.0% 15.7% 14.0%  3.2%  0.1%
  
  [libx264 @ 0x56059f9b4180] ref B L0: 88.0% 11.4%  0.6%
  
  [libx264 @ 0x56059f9b4180] kb/s:1533.05

• Get two consecutive frames

  27 mars 2019, par Wizix

  I’m trying to compare two frames of a video using libav of FFmpeg, I followed this tutorial. This is what I have done for the moment :

  int response = 0;
  
  int packetsToProcess = 500;
  
  
  
  while (av_read_frame(pFormatCtx, pPacket) >= 0) {
  
      if (pPacket->stream_index == videoStreamIndex) {
  
          response = decode_packet(pPacket, pCodecCtx, pFrame);
  
  
  
          if (response < 0) break;
  
          if (--packetsToProcess <= 0) break;
  
      }
  
  
  
      av_packet_unref(pPacket);
  
  }
  
  
  
  static int decode_packet(AVPacket *pPacket, AVCodecContext *pCodecContext, AVFrame *pFrame)
  
  {
  
      int response = avcodec_send_packet(pCodecContext, pPacket);
  
      while (response >= 0) {
  
          response = avcodec_receive_frame(pCodecContext, pFrame);
  
          if (response == AVERROR(EAGAIN) || response == AVERROR_EOF) break;
  
          if (response >= 0)
  
              printf("Frame %d pts %ld.\n", pCodecContext->frame_number, pFrame->pts); 
  
          av_frame_unref(pFrame);
  
      }
  
      return 0;
  
  }
  
  
  
  static int diff_frames(AVFrame *f, AVFrame *n)
  
  {
  
      if (f->height != n->height || f->width != n->width) {
  
          printf("Frames don't have the same size.\n");
  
          return -1;
  
      }
  
  
  
      int pixelDiff = 0;
  
  
  
      for (int y = 0; y < f->height; ++y) {
  
          for (int x = 0; x < f->width; ++x) {
  
              int fp = f->data[0][y * f->linesize[0] + x];
  
              int np = n->data[0][y * n->linesize[0] + x];
  
  
  
              if (fp != np) {
  
                  ++pixelDiff;
  
              }
  
          }
  
      }
  
  
  
      printf("Diff between %ld and %ld: %d", f->pts, n->pts, pixelDiff / (f->height * f->width));
  
  
  
      return 0;
  
  }

  My function diff_frames needs two frames to compare and my issue is : how can I have the frame and the next frame to send to it ?

• FFmpeg overwrite an AVPacket

  26 janvier 2019, par Alejandro Ramírez

  Hello guys I am working with video. I wan to encrypt the I-frames of one video compressed in H.264. So I get the AVPacket from the video and compare if (AVPacket.flags & AV_PKT_FLAG_KEY) to know if the packet has an I frame, but when I try to print the AVPacket.data I don’t have any information to encrypt.
  Where can I get the information regarding to I-frame. ahead a put my code, thank you.

  #include <iostream>
  
  extern "C" {
  
  #include <libavcodec></libavcodec>avcodec.h>
  
  #include <libavformat></libavformat>avformat.h>
  
  #include <libswscale></libswscale>swscale.h>
  
  #include <libavutil></libavutil>avutil.h>
  
  }
  
  #define INBUF_SIZE 4096
  
  //#define AV_INPUT_BUFFER_PADDING_SIZE 32
  
  int main (int argc, char * argv[])
  
  {
  
      //av_register_all();//omit
  
      //revisar el número de argumentos en el video
  
      AVFormatContext *pFormatCtx = NULL;
  
      AVCodec *dec = NULL;
  
      AVCodecContext *pCodecCtx = NULL;
  
      AVStream *st = NULL;
  
      AVDictionary *opts = NULL;
  
      AVFrame *frame;
  
      AVPacket avpkt;
  
      uint8_t inbuf [INBUF_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
  
      FILE *f;
  
      int frame_count;
  
      int video_stream_index = -1;
  
  
  
      //av_init_packet (&amp;avpkt);
  
  
  
      memset (inbuf + INBUF_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
  
      if (avformat_open_input (&amp;pFormatCtx, argv[1], NULL, NULL) != 0)
  
          return -1;
  
      if (avformat_find_stream_info (pFormatCtx, NULL) &lt; 0)
  
          return -1;
  
      //video_stream_index = av_find_best_stream (pFormatCtx,AVMEDIA_TYPE_VIDEO, -1, -1, &amp;dec,0);
  
      video_stream_index = av_find_best_stream (pFormatCtx,AVMEDIA_TYPE_VIDEO, -1, -1, &amp;dec,0);
  
      if ( video_stream_index &lt; 0)
  
          return -1;
  
      std::cout &lt;&lt; "video_stream; " &lt;&lt; video_stream_index &lt;&lt; "\n";
  
      st = pFormatCtx -> streams [video_stream_index];
  
      std::cout &lt;&lt; "number of frames " &lt;&lt; st -> nb_frames &lt;&lt; "\n";
  
      std::cout &lt;&lt; "event_flags " &lt;&lt; st -> event_flags &lt;&lt; "\n";
  
      //pCodecCtx = st -> codec;//deprecated
  
  
  
      dec = avcodec_find_decoder (st -> codecpar -> codec_id);
  
      std::cout &lt;&lt; "codec_id: " &lt;&lt; st -> codecpar -> codec_id &lt;&lt; "\n";
  
      std::cout &lt;&lt; "AV_CODEC_ID_H264: " &lt;&lt; AV_CODEC_ID_H264 &lt;&lt; "\n";
  
      if (!dec)
  
          return -1;
  
      pCodecCtx = avcodec_alloc_context3 (dec);
  
      if (!pCodecCtx)
  
          return -1;
  
      //av_dict_set (&amp;opts, "refcounted_frames", "0", 0);
  
      avcodec_parameters_to_context (pCodecCtx, st -> codecpar);
  
  
  
  
  
      std::cout &lt;&lt; "todo bien \n";    
  
      if (avcodec_open2 (pCodecCtx, dec, &amp;opts) &lt; 0)
  
          return -1;
  
      /*************hasta aqui buen codigo*********************************************/ 
  
      frame = av_frame_alloc ();
  
      if (!frame)
  
          return -1;
  
      av_init_packet (&amp;avpkt);
  
      avpkt.data = NULL;
  
      avpkt.size = 0;
  
      f = fopen (argv[1], "r");
  
      int times = 1;
  
      while (av_read_frame (pFormatCtx, &amp;avpkt) >= 0){
  
          AVPacket oripkt = avpkt;
  
          if (oripkt.stream_index == video_stream_index){
  
              if (oripkt.flags &amp; AV_PKT_FLAG_KEY){
  
                  std::cout &lt;&lt; "times: " &lt;&lt; times ++ &lt;&lt; "\n";
  
                  std::cout &lt;&lt; "avpkt.flags: " &lt;&lt; oripkt.flags &lt;&lt; "\n";
  
                  std::cout &lt;&lt; "tam avpkt.data: " &lt;&lt; sizeof(oripkt.data) &lt;&lt; "\n";
  
                  std::cout &lt;&lt; "tam avpkt.data: " &lt;&lt; oripkt.data &lt;&lt; "\n";
  
                  std::cout &lt;&lt; "oripkt.size: " &lt;&lt; oripkt.size &lt;&lt; "\n";
  
                  std::cout &lt;&lt; "oripkt.side_date_eme: " &lt;&lt; oripkt.side_data_elems &lt;&lt; "\n";
  
                  if (!oripkt.data)
  
                      std::cout &lt;&lt; "no tengo dinero \n";
  
              }
  
          }
  
      }
  
  
  
      std::cout &lt;&lt; "Fin del programa " &lt;&lt; "\n";
  
  }
  
  </iostream>