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• "invalid argument" for av_buffersrc_write_frame / av_buffersrc_add_frame

  1er février 2017, par TheSHEEEP

  I am trying to use FFmpeg C api to create a filter to merge two audio streams. Trying to follow the code from here : Implementing a multiple input filter graph with the Libavfilter library in Android NDK

  Everything seems to be alright.

  However, as soon as I call av_buffersrc_write_frame (or av_buffersrc_add_frame or av_buffersrc_add_frame_flags, it doesn’t matter), FFmpeg just reports "invalid argument" and nothing else - an utterly useless error message, as it could mean everything.
  Which argument is invalid ? What is wrong about it ? Nobody knows.

  I am initializing the graph and "grabbing" the contexts of the buffer sources for later use like this :

  // Alloc filter graph
  
  *filter_graph = avfilter_graph_alloc();
  
  if ((*filter_graph) == NULL) {
  
      os::log("Error: Cannot allocate filter graph.");
  
      return AVERROR(ENOMEM);
  
  }
  
  
  
  // Building the filter string, ommitted
  
  
  
  int result = avfilter_graph_parse2(*filter_graph, filterString.c_str(), &gis, &gos, NULL);
  
  if (result < 0)
  
  {
  
      char errorBuf[1024];
  
      av_make_error_string(errorBuf, 1024, result);
  
      log("Error: Parsing filter string: %s", errorBuf);
  
      return AVERROR_EXIT;
  
  }
  
  
  
  // Configure the graph
  
  result = avfilter_graph_config(*filter_graph, NULL);
  
  if (result < 0)
  
  {
  
      char errorBuf[1024];
  
      av_make_error_string(errorBuf, 1024, result);
  
      log("Error: Configuring filter graph: %s", errorBuf);
  
      return AVERROR_EXIT;
  
  }
  
  
  
  // Get the buffer source and buffer sink contexts
  
  for (unsigned int i = 0; i < (*filter_graph)->nb_filters; ++i) {
  
      AVFilterContext* filterContext = (*filter_graph)->filters[i];
  
  
  
      // The first two filters should be the abuffers
  
      std::string name = filterContext->name;
  
      if (name.find("abuffer") != name.npos && i < 2) {
  
          inputs[i].buffer_source_context = filterContext;
  
      }
  
  
  
      // abuffersink is the one we need to get the converted frames from
  
      if (name.find("abuffersink") != name.npos) {
  
          *buffer_sink_context = filterContext;
  
      }
  
  }

  There are absolutely no errors in the initialization. At least FFmpeg has only this to say about it, which I think looks good :

  FFMPEG: [Parsed_abuffer_0 @ 0ddfe840] Setting 'time_base' to value '1/48000'
  
  FFMPEG: [Parsed_abuffer_0 @ 0ddfe840] Setting 'sample_rate' to value '48000'
  
  FFMPEG: [Parsed_abuffer_0 @ 0ddfe840] Setting 'sample_fmt' to value '1'
  
  FFMPEG: [Parsed_abuffer_0 @ 0ddfe840] Setting 'channel_layout' to value '3'
  
  FFMPEG: [Parsed_abuffer_0 @ 0ddfe840] Setting 'channels' to value '2'
  
  FFMPEG: [Parsed_abuffer_0 @ 0ddfe840] tb:1/48000 samplefmt:s16 samplerate:48000 chlayout:3
  
  FFMPEG: [Parsed_abuffer_1 @ 0ddfe500] Setting 'time_base' to value '1/44100'
  
  FFMPEG: [Parsed_abuffer_1 @ 0ddfe500] Setting 'sample_rate' to value '44100'
  
  FFMPEG: [Parsed_abuffer_1 @ 0ddfe500] Setting 'sample_fmt' to value '1'
  
  FFMPEG: [Parsed_abuffer_1 @ 0ddfe500] Setting 'channel_layout' to value '3'
  
  FFMPEG: [Parsed_abuffer_1 @ 0ddfe500] Setting 'channels' to value '2'
  
  FFMPEG: [Parsed_abuffer_1 @ 0ddfe500] tb:1/44100 samplefmt:s16 samplerate:44100 chlayout:3
  
  FFMPEG: [Parsed_volume_3 @ 0ddfe580] Setting 'volume' to value '2'
  
  FFMPEG: [Parsed_aresample_4 @ 0ddfe660] Setting 'sample_rate' to value '48000'
  
  FFMPEG: [Parsed_aformat_5 @ 0ddfe940] Setting 'sample_fmts' to value 'fltp'
  
  FFMPEG: [Parsed_aformat_5 @ 0ddfe940] Setting 'channel_layouts' to value '3'

  Then, I am trying to add a frame (that has been decoded beforehand) like this :

  // "buffer_source_context" is one of the "inputs[i].buffer_source_context" from the code above
  
  int result = av_buffersrc_write_frame(  buffer_source_context,
  
                                              input_frame);
  
  if (result < 0) {
  
      char errorBuf[1024];
  
      av_make_error_string(errorBuf, 1024, result);
  
      log("Error: While adding to buffer source: %s", errorBuf);
  
      return AVERROR_EXIT;
  
  }

  And the result is the mentioned "invalid argument".

  The buffer_source_context is one of those noted from the code above and the input_frame is perfectly fine as well.
  Before the filtering code was added, the same frame was passed to an encoder instead without a problem.

  I am at a loss at what the error could be here. I log FFmpeg errors at the lowest possible level, but not a single error is shown. I am using FFmpeg 3.1.1.

• FFMPEG Debug "Invalid data found when processing input"

  29 septembre 2020, par dgcipp

  How can I debug this error ? I am trying to display a vp8-encoded video stream (TCP) from Android (x86) to my PC but I got this message from ffplay : "tcp ://10.8.0.3:49152 ? listen : Invalid data found when processing input"

  


  With h264 it works and the same code in an android device works with vp8 too.

  


  Command in the server :

  


  ffplay -i tcp://10.8.0.3:49152?listen


  


  I have tried adding verbosity or log-level debug, but it shows the same. How can I get a detailed error ?

  


  

  


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

  13 juin 2020, 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.