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• FFMPEG "buffer queue overflow, dropping" with trim and atrim filters

  11 décembre 2016, par Prasanna Mahendiran

  In FFMPEG I am actually trimming and concating a 24 FPS video. When I apply a complex filter

  ffmpeg -i sample.mp4 -filter_complex \
  
    "[0:v]setpts = PTS-STARTPTS[bv];
  
    [bv]split=6[v0][v1][v2][v3][v4][v5];
  
    [v0]trim=start_frame=1:end_frame=142,loop=1:1:1,setpts=N/FRAME_RATE/TB[0v];
  
    [v1]trim=start_frame=846:end_frame=878,loop=1:1:1,setpts=N/FRAME_RATE/TB[1v];
  
    [v2]trim=start_frame=57:end_frame=114,loop=1:1:1,setpts=N/FRAME_RATE/TB[2v];
  
    [v3]trim=start_frame=865:end_frame=885,loop=1:1:1,setpts=N/FRAME_RATE/TB[3v];
  
    [v4]trim=start_frame=70:end_frame=155,loop=1:1:1,setpts=N/FRAME_RATE/TB[4v];
  
    [v5]trim=start_frame=155:end_frame=909,loop=1:1:1,setpts=N/FRAME_RATE/TB[5v];
  
    [0:a]asplit=6[a0][a1][a2][a3][a4][a5];
  
    [a0]atrim=0.041666666666666664:5.917,asetpts=N/SR/TB[0a];
  
    [a1]atrim=35.256:36.603,asetpts=N/SR/TB[1a];
  
    [a2]atrim=2.379:4.767,asetpts=N/SR/TB[2a];
  
    [a3]atrim=36.024:36.859,asetpts=N/SR/TB[3a];
  
    [a4]atrim=2.93:6.438172,asetpts=N/SR/TB[4a];
  
    [a5]atrim=6.438172:37.895,asetpts=N/SR/TB[5a];
  
    [0v][0a][1v][1a][2v][2a][3v][3a][4v][4a][5v][5a]concat=n=6:v=1:a=1[vv][aa]"\
  
    -map "[vv]" -map "[aa]" output.mp4

  I am getting "buffer queue overflow, dropping" error. The resultant video and audio is still and not working properly.

  ffmpeg version 3.2-1~16.04.york1 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 5.4.1 (Ubuntu 5.4.1-3ubuntu1~ubuntu16.04.1york0) 20161019
  
    configuration: --prefix=/usr --extra-version='1~16.04.york1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-libtesseract --disable-stripping --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librubberband --enable-libschroedinger --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-libxvid --enable-libzmq --enable-libzvbi --enable-opengl --enable-sdl2 --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-openal --enable-frei0r --enable-libopencv --enable-libx264 --enable-chromaprint --enable-shared
  
    libavutil      55. 34.100 / 55. 34.100
  
    libavcodec     57. 64.100 / 57. 64.100
  
    libavformat    57. 56.100 / 57. 56.100
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libavresample   3.  1.  0 /  3.  1.  0
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      track           : 0
  
      artist          : 
  
      album           : 
  
      date            : 0
  
      genre           : 
  
      lyrics          : 
  
      title           : 
  
      encoder         : Lavf56.36.100
  
    Duration: 00:00:37.90, start: 0.000000, bitrate: 951 kb/s
  
      Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 820 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 126 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  File 'output.mp4' already exists. Overwrite ? [y/N] y
  
  [libx264 @ 0x55650097a540] using SAR=1/1
  
  [libx264 @ 0x55650097a540] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0x55650097a540] profile High, level 3.0
  
  [libx264 @ 0x55650097a540] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=24 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 'output.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      track           : 0
  
      artist          : 
  
      album           : 
  
      date            : 0
  
      genre           : 
  
      lyrics          : 
  
      title           : 
  
      encoder         : Lavf57.56.100
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 24 fps, 12288 tbn, 24 tbc (default)
  
      Metadata:
  
        encoder         : Lavc57.64.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
      Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
        encoder         : Lavc57.64.100 aac
  
  Stream mapping:
  
    Stream #0:0 (h264) -> setpts
  
    Stream #0:1 (aac) -> asplit
  
    concat:out:v0 -> Stream #0:0 (libx264)
  
    concat:out:a0 -> Stream #0:1 (aac)
  
  Press [q] to stop, [?] for help
  
  [Parsed_concat_33 @ 0x55650097b420] Buffer queue overflow, dropping. 471.5kbits/s speed=4.94x    
  
      Last message repeated 201 times
  
  [Parsed_concat_33 @ 0x55650097b420] Buffer queue overflow, dropping. 522.9kbits/s speed=3.89x    
  
      Last message repeated 1266 times
  
  [Parsed_concat_33 @ 0x55650097b420] Buffer queue overflow, dropping. 557.0kbits/s speed=3.28x    
  
      Last message repeated 48 times
  
  [output stream 0:1 @ 0x556500947e20] 100 buffers queued in output stream 0:1, something may be wrong.
  
  [Parsed_concat_33 @ 0x55650097b420] Buffer queue overflow, dropping. 718.6kbits/s speed=3.46x    
  
      Last message repeated 19 times
  
  [output stream 0:0 @ 0x5565009785c0] 100 buffers queued in output stream 0:0, something may be wrong.
  
  frame= 1091 fps=117 q=-1.0 Lsize=    2795kB time=00:00:45.51 bitrate= 503.1kbits/s dup=475 drop=0 speed=4.88x    
  
  video:2455kB audio:316kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.861779%
  
  [libx264 @ 0x55650097a540] frame I:8     Avg QP:19.26  size: 24207
  
  [libx264 @ 0x55650097a540] frame P:409   Avg QP:21.33  size:  4108
  
  [libx264 @ 0x55650097a540] frame B:674   Avg QP:27.46  size:   949
  
  [libx264 @ 0x55650097a540] consecutive B-frames: 10.3% 13.9% 24.5% 51.3%
  
  [libx264 @ 0x55650097a540] mb I  I16..4:  9.9% 57.0% 33.1%
  
  [libx264 @ 0x55650097a540] mb P  I16..4:  3.6%  7.6%  2.9%  P16..4: 33.0% 10.6%  3.0%  0.0%  0.0%    skip:39.2%
  
  [libx264 @ 0x55650097a540] mb B  I16..4:  0.4%  0.8%  0.4%  B16..8: 24.5%  2.6%  0.2%  direct: 0.5%  skip:70.5%  L0:55.5% L1:41.8% BI: 2.7%
  
  [libx264 @ 0x55650097a540] 8x8 transform intra:53.8% inter:66.7%
  
  [libx264 @ 0x55650097a540] coded y,uvDC,uvAC intra: 44.6% 50.0% 14.8% inter: 6.2% 7.7% 0.2%
  
  [libx264 @ 0x55650097a540] i16 v,h,dc,p: 22% 28% 17% 33%
  
  [libx264 @ 0x55650097a540] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 23% 28%  3%  4%  3% 11%  3%  5%
  
  [libx264 @ 0x55650097a540] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 26% 16%  2%  5%  3% 16%  3%  3%
  
  [libx264 @ 0x55650097a540] i8c dc,h,v,p: 60% 22% 13%  6%
  
  [libx264 @ 0x55650097a540] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x55650097a540] ref P L0: 72.6%  8.4% 15.1%  3.9%
  
  [libx264 @ 0x55650097a540] ref B L0: 88.5% 10.7%  0.8%
  
  [libx264 @ 0x55650097a540] ref B L1: 93.3%  6.7%
  
  [libx264 @ 0x55650097a540] kb/s:442.30
  
  [aac @ 0x556500979280] Qavg: 3215.870

  I tried with other stackoverflow questions but none of them worked. Also I think it is partially because the trim timings are mixed. That is start time can be anywhere between 0-end. When I make it strictly increasing it is working fine.

• "Amix" and "adelay" combined leads to "Error while filtering : Cannot allocate memory"

  10 février 2016, par Harald Nordgren

  I was trying to add to audio clips together (using amix) while delaying one of them (with adelay). I used the following command

  ffmpeg -i org/onclassical_demo_luisi_chopin_scherzo_2_31_small-version_ii-ending.wav \
  
  -i org/all_u_had_2_say.wav -filter_complex \
  
  "[1]adelay=1000[del1];[0][del1]amix" out.wav

  and get the following output

  ffmpeg version N-77387-g9d38f06 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  
    configuration: --enable-libmp3lame --enable-gpl --enable-libx264 --enable-libx265
  
    libavutil      55. 11.100 / 55. 11.100
  
    libavcodec     57. 18.100 / 57. 18.100
  
    libavformat    57. 20.100 / 57. 20.100
  
    libavdevice    57.  0.100 / 57.  0.100
  
    libavfilter     6. 21.100 /  6. 21.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Guessed Channel Layout for  Input Stream #0.0 : stereo
  
  Input #0, wav, from 'org/onclassical_demo_luisi_chopin_scherzo_2_31_small-version_ii-ending.wav':
  
    Duration: 00:02:18.26, bitrate: 1411 kb/s
  
      Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s
  
  Guessed Channel Layout for  Input Stream #1.0 : mono
  
  Input #1, wav, from 'org/all_u_had_2_say.wav':
  
    Duration: 00:00:03.85, bitrate: 88 kb/s
  
      Stream #1:0: Audio: pcm_u8 ([1][0][0][0] / 0x0001), 11025 Hz, 1 channels, u8, 88 kb/s
  
  Output #0, wav, to 'out.wav':
  
    Metadata:
  
      ISFT            : Lavf57.20.100
  
      Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 11025 Hz, mono, s16, 176 kb/s (default)
  
      Metadata:
  
        encoder         : Lavc57.18.100 pcm_s16le
  
  Stream mapping:
  
    Stream #0:0 (pcm_s16le) -> amix:input0
  
    Stream #1:0 (pcm_u8) -> adelay
  
    amix -> Stream #0:0 (pcm_s16le)
  
  Press [q] to stop, [?] for help
  
  Error while filtering: Cannot allocate memory
  
  size=      83kB time=00:00:03.85 bitrate= 176.6kbits/s speed= 213x    
  
  video:0kB audio:83kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.091808%

  Maybe there is some incompatibility between the streams (pcm_s16le, 44100 Hz, 2 channels vs. pcm_u8, 11025 Hz, 1 channel) that need to be handled first, but running only amix works so that doesn’t actually seem to be the case.

• avcodec_open2 error -542398533 : "Generic error in an external library"

  15 février 2017, par bot1131357

  I am encountering an error when trying to open the codec with avcodec_open2(). I have tried the same code without any problems if I specify avi instead of h264 in the av_guess_format() function.

  I don’t know what to make of it. Has anyone else encountered a similar problem ?

  The library that I’m using is ffmpeg-20160219-git-98a0053-win32-dev. I would really really appreciate if you could help me out of this confusion.

  This is my console output :

  Video encoding
  [libx264 @ 01383460] broken ffmpeg default settings detected
  [libx264 @ 01383460] use an encoding preset (e.g. -vpre medium)
  [libx264 @ 01383460] preset usage : -vpre -vpre
  [libx264 @ 01383460] speed presets are listed in x264 —help
  [libx264 @ 01383460] profile is optional ; x264 defaults to high
  Cannot open video codec, -542398533

  This is the code that I’m working with :

  // Video encoding sample
  
  AVCodec *codec = NULL;
  
  AVCodecContext *codecCtx= NULL;
  
  AVFormatContext *pFormatCtx = NULL;
  
  AVOutputFormat *pOutFormat = NULL;
  
  AVStream * pVideoStream = NULL;;
  
  AVFrame *picture = NULL;;
  
  
  
  int i, x, y, ret;
  
  
  
  printf("Video encoding\n");
  
  
  
  // Register all formats and codecs
  
  av_register_all();
  
  
  
  // guess format from file extension
  
  pOutFormat = av_guess_format("h264", NULL, NULL);
  
  if (NULL==pOutFormat){
  
      cerr << "Could not guess output format" << endl;
  
      return -1;
  
  }   
  
  
  
  // allocate context
  
  pFormatCtx = avformat_alloc_context();
  
  pFormatCtx->oformat = pOutFormat;
  
  memcpy(pFormatCtx->filename,filename,
  
      min(strlen(filename), sizeof(pFormatCtx->filename)));
  
  
  
  // Add stream to pFormatCtx
  
  pVideoStream = avformat_new_stream(pFormatCtx, 0);
  
  if (!pVideoStream) 
  
  {
  
      printf("Cannot add new video stream\n");
  
      return -1;
  
  }
  
  
  
  // Set stream's codec context
  
  codecCtx = pVideoStream->codec;
  
  codecCtx->codec_id = (AVCodecID)pOutFormat->video_codec;
  
  codecCtx->codec_type = AVMEDIA_TYPE_VIDEO;
  
  codecCtx->frame_number = 0;
  
  // Put sample parameters.
  
  codecCtx->bit_rate = 2000000;
  
  // Resolution must be a multiple of two.
  
  codecCtx->width  = 320;
  
  codecCtx->height = 240;
  
  codecCtx->time_base.den = 10;
  
  codecCtx->time_base.num = 1;
  
  pVideoStream->time_base.den = 10;
  
  pVideoStream->time_base.num = 1;
  
  codecCtx->gop_size = 12; // emit one intra frame every twelve frames at most
  
  codecCtx->pix_fmt = AV_PIX_FMT_YUV420P;
  
  
  
  if (codecCtx->codec_id == AV_CODEC_ID_H264)
  
  {
  
      // Just for testing, we also add B frames 
  
      codecCtx->mb_decision = 2;
  
  }
  
  // Some formats want stream headers to be separate.
  
  if(pFormatCtx->oformat->flags & AVFMT_GLOBALHEADER)
  
  {
  
      codecCtx->flags |= CODEC_FLAG_GLOBAL_HEADER;
  
  }
  
  
  
  if(codecCtx->codec_id == AV_CODEC_ID_H264)
  
      av_opt_set(codecCtx->priv_data, "preset", "slow", 0);
  
  
  
  
  
  // Open the codec.
  
  codec = avcodec_find_encoder(codecCtx->codec_id);
  
  if (codec == NULL) {
  
      fprintf(stderr, "Codec not found\n");
  
      return -1;
  
  }
  
  ret = avcodec_open2(codecCtx, codec, NULL); // returns -542398533 here
  
  if (ret < 0) 
  
  {
  
      printf("Cannot open video codec, %d\n",ret);
  
      return -1;
  
  }