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• TCL command prompt crashed with the error "ffmpeg.exe stopped working" with tcl version 8.0 and window 7

  9 février 2019, par M. D. P

  TCL command prompt crashed with the error "ffmpeg.exe has stopped working" with tcl version 8.0 and window 7 32 bit. my code file is "live.tcl" which is as follow :

  proc live {} {
  
  
  
  exec ffmpeg -f dshow -s 1280x720 -i "video=Logitech HD Webcam C525" -f sdl2 - >& c:/test/temp.txt &
  
  
  
  }
  
  live

  On the other hand same my code for video capturing i.e "videocapture.tcl" works on the same tclsh command prompt on windows 7. my tcl code for "videocapture.tcl" is :

  proc videocapture {} { 
  
  
  
   exec ffmpeg -f dshow -t 00:00:10 -i "video=Integrated Webcam" c:/test/sample-a.avi >& temp.txt & 
  
   
  
  }
  
  videocapture

  error report is as follow :

  ffmpeg started on 2017-11-22 at 10:56:04
  
  Report written to "ffmpeg-20171122-105604.log"
  
  Command line:
  
  ffmpeg -f dshow -s 1280x720 -i "video=HD Webcam C525" -report -f sdl2 -
  
  ffmpeg version N-89127-g8f4702a93f Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 7.2.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth --enable-libmfx
  
    libavutil      56.  0.100 / 56.  0.100
  
    libavcodec     58.  3.103 / 58.  3.103
  
    libavformat    58.  2.100 / 58.  2.100
  
    libavdevice    58.  0.100 / 58.  0.100
  
    libavfilter     7.  2.100 /  7.  2.100
  
    libswscale      5.  0.101 /  5.  0.101
  
    libswresample   3.  0.101 /  3.  0.101
  
    libpostproc    55.  0.100 / 55.  0.100
  
  Splitting the commandline.
  
  Reading option '-f' ... matched as option 'f' (force format) with argument 'dshow'.
  
  Reading option '-s' ... matched as option 's' (set frame size (WxH or abbreviation)) with argument '1280x720'.
  
  Reading option '-i' ... matched as input url with argument 'video=HD Webcam C525'.
  
  Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
  
  Reading option '-f' ... matched as option 'f' (force format) with argument 'sdl2'.
  
  Reading option '-' ... matched as output url.
  
  Finished splitting the commandline.
  
  Parsing a group of options: global .
  
  Applying option report (generate a report) with argument 1.
  
  Successfully parsed a group of options.
  
  Parsing a group of options: input url video=HD Webcam C525.
  
  Applying option f (force format) with argument dshow.
  
  Applying option s (set frame size (WxH or abbreviation)) with argument 1280x720.
  
  Successfully parsed a group of options.
  
  Opening an input file: video=HD Webcam C525.
  
  [dshow @ 03dfca20] Selecting pin Capture on video
  
  dshow passing through packet of type video size  1843200 timestamp 664898760000 orig timestamp 664898643970 graph timestamp 664898760000 diff 116030 HD Webcam C525
  
  [dshow @ 03dfca20] All info found
  
  Input #0, dshow, from 'video=HD Webcam C525':
  
    Duration: N/A, start: 66489.876000, bitrate: N/A
  
  Stream #0:0, 1, 1/10000000: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1280x720, 10 fps, 10 tbr, 10000k tbn, 10000k tbc
  
  Successfully opened the file.
  
  Parsing a group of options: output url -.
  
  Applying option f (force format) with argument sdl2.
  
  Successfully parsed a group of options.
  
  Opening an output file: -.
  
  Successfully opened the file.
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo (native) -> rawvideo (native))
  
  Press [q] to stop, [?] for help
  
  cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  
  [rawvideo @ 03e01660] PACKET SIZE: 1843200, STRIDE: 2560
  
  detected 1 logical cores
  
  [graph 0 input from stream 0:0 @ 03e06ae0] Setting 'video_size' to value '1280x720'
  
  [graph 0 input from stream 0:0 @ 03e06ae0] Setting 'pix_fmt' to value '1'
  
  [graph 0 input from stream 0:0 @ 03e06ae0] Setting 'time_base' to value '1/10000000'
  
  [graph 0 input from stream 0:0 @ 03e06ae0] Setting 'pixel_aspect' to value '0/1'
  
  [graph 0 input from stream 0:0 @ 03e06ae0] Setting 'sws_param' to value 'flags=2'
  
  [graph 0 input from stream 0:0 @ 03e06ae0] Setting 'frame_rate' to value '10000000/1000000'
  
  [graph 0 input from stream 0:0 @ 03e06ae0] w:1280 h:720 pixfmt:yuyv422 tb:1/10000000 fr:10000000/1000000 sar:0/1 sws_param:flags=2
  
  [AVFilterGraph @ 03de2780] query_formats: 3 queried, 2 merged, 0 already done, 0 delayed
  
  dshow passing through packet of type video size  1843200 timestamp 664899770000 orig timestamp 664899643970 graph timestamp 664899770000 diff 126030 HD Webcam C525
  
  dshow passing through packet of type video size  1843200 timestamp 664900890000 orig timestamp 664900643970 graph timestamp 664900890000 diff 246030 HD Webcam C525
  
  dshow passing through packet of type video size  1843200 timestamp 664902040000 orig timestamp 664901643970 graph timestamp 664902040000 diff 396030 HD Webcam C525
  
  [dshow @ 03dfca20] real-time buffer [HD Webcam C525] [video input] too full or near too full (121% of size: 3041280 [rtbufsize parameter])! frame dropped!
  
  dshow passing through packet of type video size  1843200 timestamp 664902650000 orig timestamp 664902643970 graph timestamp 664902650000 diff 6030 HD Webcam C525
  
  [dshow @ 03dfca20] real-time buffer [HD Webcam C525] [video input] too full or near too full (121% of size: 3041280 [rtbufsize parameter])! frame dropped!
  
  dshow passing through packet of type video size  1843200 timestamp 664903610000 orig timestamp 664903643970 graph timestamp 664903610000 diff -33970 HD Webcam C525
  
  [dshow @ 03dfca20] real-time buffer [HD Webcam C525] [video input] too full or near too full (121% of size: 3041280 [rtbufsize parameter])! frame dropped!
  
  dshow passing through packet of type video size  1843200 timestamp 664904570000 orig timestamp 664904643970 graph timestamp 664904570000 diff -73970 HD Webcam C525
  
  [dshow @ 03dfca20] real-time buffer [HD Webcam C525] [video input] too full or near too full (121% of size: 3041280 [rtbufsize parameter])! frame dropped!
  
  dshow passing through packet of type video size  1843200 timestamp 664905520000 orig timestamp 664905643970 graph timestamp 664905520000 diff -123970 HD Webcam C525
  
  [dshow @ 03dfca20] real-time buffer [HD Webcam C525] [video input] too full or near too full (121% of size: 3041280 [rtbufsize parameter])! frame dropped!
  
  dshow passing through packet of type video size  1843200 timestamp 664929720000 orig timestamp 664906643970 graph timestamp 664929720000 diff 23076030 HD Webcam C525
  
  [dshow @ 03dfca20] real-time buffer [HD Webcam C525] [video input] too full or near too full (121% of size: 3041280 [rtbufsize parameter])! frame dropped!
  
  dshow passing through packet of type video size  1843200 timestamp 664929760000 orig timestamp 664907643970 graph timestamp 664929760000 diff 22116030 HD Webcam C525
  
  [dshow @ 03dfca20] real-time buffer [HD Webcam C525] [video input] too full or near too full (121% of size: 3041280 [rtbufsize parameter])! frame dropped!
  
  dshow passing through packet of type video size  1843200 timestamp 664929790000 orig timestamp 664908643970 graph timestamp 664929790000 diff 21146030 HD Webcam C525
  
  [dshow @ 03dfca20] real-time buffer [HD Webcam C525] [video input] too full or near too full (121% of size: 3041280 [rtbufsize parameter])! frame dropped!
  
  dshow passing through packet of type video size  1843200 timestamp 664929820000 orig timestamp 664909643970 graph timestamp 664929820000 diff 20176030 HD Webcam C525
  
  [dshow @ 03dfca20] real-time buffer [HD Webcam C525] [video input] too full or near too full (121% of size: 3041280 [rtbufsize parameter])! frame dropped!
  
  dshow passing through packet of type video size  1843200 timestamp 664929870000 orig timestamp 664910643970 graph timestamp 664929870000 diff 19226030 HD Webcam C525
  
  [dshow @ 03dfca20] real-time buffer [HD Webcam C525] [video input] too full or near too full (121% of size: 3041280 [rtbufsize parameter])! frame dropped!
  
  dshow passing through packet of type video size  1843200 timestamp 664929910000 orig timestamp 664911643970 graph timestamp 664929910000 diff 18266030 HD Webcam C525
  
  [dshow @ 03dfca20] real-time buffer [HD Webcam C525] [video input] too full or near too full (121% of size: 3041280 [rtbufsize parameter])! frame dropped!
  
  dshow passing through packet of type video size  1843200 timestamp 664929940000 orig timestamp 664912643970 graph timestamp 664929940000 diff 17296030 HD Webcam C525
  
  [dshow @ 03dfca20] real-time buffer [HD Webcam C525] [video input] too full or near too full (121% of size: 3041280 [rtbufsize parameter])! frame dropped!
  
  dshow passing through packet of type video size  1843200 timestamp 664929980000 orig timestamp 664913643970 graph timestamp 664929980000 diff 16336030 HD Webcam C525
  
  [dshow @ 03dfca20] real-time buffer [HD Webcam C525] [video input] too full or near too full (121% of size: 3041280 [rtbufsize parameter])! frame dropped!
  
  dshow passing through packet of type video size  1843200 timestamp 664930030000 orig timestamp 664914643970 graph timestamp 664930030000 diff 15386030 HD Webcam C525
  
  [dshow @ 03dfca20] real-time buffer [HD Webcam C525] [video input] too full or near too full (121% of size: 3041280 [rtbufsize parameter])! frame dropped!
  
  dshow passing through packet of type video size  1843200 timestamp 664930070000 orig timestamp 664915643970 graph timestamp 664930070000 diff 14426030 HD Webcam C525
  
  [dshow @ 03dfca20] real-time buffer [HD Webcam C525] [video input] too full or near too full (121% of size: 3041280 [rtbufsize parameter])! frame dropped!

• "moov atom not found" when using av_interleaved_write_frame but not avio_write

  9 octobre 2017, par icStatic

  I am attempting to put together a class that can take arbitrary frames and construct a video from it using the ffmpeg 3.3.3 API. I’ve been struggling to find a good example for this as the examples still seem to be using deprecated functions, so I’ve attempted to patch this using the documentation in the headers and by referring to a few github repos that seem to be using the new version.

  If I use av_interleaved_write_frame to write the encoded packets to the output then ffprobe outputs the following :

  [mov,mp4,m4a,3gp,3g2,mj2 @ 0000000002760120] moov atom not found0
  
  X:\Diagnostics.mp4: Invalid data found when processing input

  ffplay is unable to play the file generated using this method.

  If I instead swap it out for a call to avio_write, ffprobe instead outputs :

  Input #0, h264, from 'X:\Diagnostics.mp4':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: h264 (Main), yuv420p(progressive), 672x380 [SAR 1:1 DAR 168:95], 25 fps, 25 tbr, 1200k tbn, 50 tbc

  ffplay can mostly play this file until it gets towards the end, when it outputs :

  Input #0, h264, from 'X:\Diagnostics.mp4':    0KB sq=    0B f=0/0
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: h264 (Main), yuv420p(progressive), 672x380 [SAR 1:1 DAR 168:95], 25 fps, 25 tbr, 1200k tbn, 50 tbc
  
  [h264 @ 000000000254ef80] error while decoding MB 31 22, bytestream -65
  
  [h264 @ 000000000254ef80] concealing 102 DC, 102 AC, 102 MV errors in I frame
  
      nan M-V:    nan fd=   1 aq=    0KB vq=    0KB sq=    0B f=0/0

  VLC cannot play files from either method. The second method’s file displays a single black frame then hides the video output. The first does not display anything. Neither of them give a video duration.

  Does anyone have any ideas what’s happening here ? I assume my solution is close to working as I’m getting a good chunk of valid frames coming through.

  Code :

  void main()
  
  {
  
      OutputStream Stream( "Output.mp4", 672, 380, 25, true );
  
      Stream.Initialize();
  
  
  
      int i = 100;
  
      while( i-- )
  
      {
  
          //... Generate a frame
  
  
  
          Stream.WriteFrame( Frame );
  
      }
  
      Stream.CloseFile();
  
  }
  
  
  
  OutputStream::OutputStream( const std::string& Path, unsigned int Width, unsigned int Height, int Framerate, bool IsBGR )
  
  : Stream()
  
  , FrameIndex( 0 )
  
  {
  
      auto& ID = *m_InternalData;
  
  
  
      ID.Path = Path;
  
  
  
      ID.Width = Width;
  
      ID.Height= Height;
  
      ID.Framerate.num = Framerate;
  
      ID.Framerate.den = 1;
  
  
  
      ID.PixelFormat = IsBGR ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_RGB24;
  
      ID.CodecID = AV_CODEC_ID_H264;
  
      ID.CodecTag = 0;
  
  
  
      ID.AspectRatio.num = 1;
  
      ID.AspectRatio.den = 1;
  
  }
  
  
  
  CameraStreamError OutputStream::Initialize()
  
  {
  
      av_log_set_callback( &InputStream::LogCallback );
  
      av_register_all();
  
      avformat_network_init();
  
  
  
      auto& ID = *m_InternalData;
  
  
  
      av_init_packet( &ID.Packet );
  
  
  
      int Result = avformat_alloc_output_context2( &ID.FormatContext, nullptr, nullptr, ID.Path.c_str() );
  
      if( Result < 0 || !ID.FormatContext )
  
      {
  
          STREAM_ERROR( UnknownError );
  
      }
  
  
  
      AVCodec* Encoder = avcodec_find_encoder( ID.CodecID );
  
  
  
      if( !Encoder )
  
      {
  
          STREAM_ERROR( NoH264Support );
  
      }
  
  
  
      AVStream* OutStream = avformat_new_stream( ID.FormatContext, Encoder );
  
      if( !OutStream )
  
      {
  
          STREAM_ERROR( UnknownError );
  
      }
  
  
  
      ID.CodecContext = avcodec_alloc_context3( Encoder );
  
      if( !ID.CodecContext )
  
      {
  
          STREAM_ERROR( NoH264Support );
  
      }
  
  
  
      ID.CodecContext->time_base = av_inv_q(ID.Framerate);
  
  
  
      {
  
          AVCodecParameters* CodecParams = OutStream->codecpar;
  
  
  
          CodecParams->width = ID.Width;
  
          CodecParams->height = ID.Height;
  
          CodecParams->format = AV_PIX_FMT_YUV420P;
  
          CodecParams->codec_id = ID.CodecID;
  
          CodecParams->codec_type = AVMEDIA_TYPE_VIDEO;
  
          CodecParams->profile = FF_PROFILE_H264_MAIN;
  
          CodecParams->level = 40;
  
  
  
          Result = avcodec_parameters_to_context( ID.CodecContext, CodecParams );
  
          if( Result < 0 )
  
          {
  
              STREAM_ERROR( EncoderCreationError );
  
          }
  
      }
  
  
  
      if( ID.IsVideo )
  
      {
  
          ID.CodecContext->width = ID.Width;
  
          ID.CodecContext->height = ID.Height;
  
          ID.CodecContext->sample_aspect_ratio = ID.AspectRatio;
  
          ID.CodecContext->time_base = av_inv_q(ID.Framerate);
  
  
  
          if( Encoder->pix_fmts )
  
          {
  
              ID.CodecContext->pix_fmt = Encoder->pix_fmts[0];
  
          }
  
          else
  
          {
  
              ID.CodecContext->pix_fmt = ID.PixelFormat;
  
          }
  
      }
  
      //Snip
  
  
  
      Result = avcodec_open2( ID.CodecContext, Encoder, nullptr );
  
      if( Result < 0 )
  
      {
  
          STREAM_ERROR( EncoderCreationError );
  
      }
  
  
  
      Result = avcodec_parameters_from_context( OutStream->codecpar, ID.CodecContext );
  
      if( Result < 0 )
  
      {
  
          STREAM_ERROR( EncoderCreationError );
  
      }
  
  
  
      if( ID.FormatContext->oformat->flags & AVFMT_GLOBALHEADER )
  
      {
  
          ID.CodecContext->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
  
      }
  
  
  
      OutStream->time_base = ID.CodecContext->time_base;
  
      OutStream->avg_frame_rate= av_inv_q(OutStream->time_base);
  
  
  
      if( !( ID.FormatContext->oformat->flags & AVFMT_NOFILE ) )
  
      {
  
          Result = avio_open( &ID.FormatContext->pb, ID.Path.c_str(), AVIO_FLAG_WRITE );
  
          if( Result < 0 )
  
          {
  
              STREAM_ERROR( FileNotWriteable );
  
          }
  
      }
  
  
  
      Result = avformat_write_header( ID.FormatContext, nullptr );
  
      if( Result < 0 )
  
      {
  
          STREAM_ERROR( WriteFailed );
  
      }
  
  
  
      ID.Output = std::make_unique( ID.CodecContext->width, ID.CodecContext->height, ID.CodecContext->pix_fmt );
  
  
  
      ID.ConversionContext = sws_getCachedContext(
  
          ID.ConversionContext,
  
          ID.Width,
  
          ID.Height,
  
          ID.PixelFormat,
  
          ID.CodecContext->width,
  
          ID.CodecContext->height,
  
          ID.CodecContext->pix_fmt,
  
          SWS_BICUBIC,
  
          NULL,
  
          NULL,
  
          NULL );
  
  
  
      return CameraStreamError::Success;
  
  }
  
  
  
  CameraStreamError OutputStream::WriteFrame( FFMPEG::Frame* Frame )
  
  {
  
      auto& ID = *m_InternalData;
  
  
  
      ID.Output->Prepare();
  
  
  
      int OutputSliceSize = sws_scale( m_InternalData->ConversionContext, Frame->GetFrame()->data, Frame->GetFrame()->linesize, 0, Frame->GetHeight(), ID.Output->GetFrame()->data, ID.Output->GetFrame()->linesize );
  
  
  
      ID.Output->GetFrame()->pts = ID.CodecContext->frame_number;
  
  
  
      int Result = avcodec_send_frame( GetData().CodecContext, ID.Output->GetFrame() );
  
      if( Result == AVERROR(EAGAIN) )
  
      {
  
          CameraStreamError ResultErr = SendAll();
  
          if( ResultErr != CameraStreamError::Success )
  
          {
  
              return ResultErr;
  
          }
  
          Result = avcodec_send_frame( GetData().CodecContext, ID.Output->GetFrame() );
  
      }
  
  
  
      if( Result == 0 )
  
      {
  
          CameraStreamError ResultErr = SendAll();
  
          if( ResultErr != CameraStreamError::Success )
  
          {
  
              return ResultErr;
  
          }
  
      }
  
  
  
      FrameIndex++;
  
  
  
      return CameraStreamError::Success;
  
  }
  
  
  
  CameraStreamError OutputStream::SendAll( void )
  
  {
  
      auto& ID = *m_InternalData;
  
  
  
      int Result;
  
      do 
  
      {
  
          AVPacket TempPacket = {};
  
          av_init_packet( &TempPacket );
  
  
  
          Result = avcodec_receive_packet( GetData().CodecContext, &TempPacket );
  
          if( Result == 0 )
  
          {
  
              av_packet_rescale_ts( &TempPacket, ID.CodecContext->time_base, ID.FormatContext->streams[0]->time_base );
  
  
  
              TempPacket.stream_index = ID.FormatContext->streams[0]->index;
  
  
  
              //avio_write( ID.FormatContext->pb, TempPacket.data, TempPacket.size );
  
              Result = av_interleaved_write_frame( ID.FormatContext, &TempPacket );
  
              if( Result < 0 )
  
              {
  
                  STREAM_ERROR( WriteFailed );
  
              }
  
  
  
              av_packet_unref( &TempPacket );
  
          }
  
          else if( Result != AVERROR(EAGAIN) )
  
          {
  
              continue;
  
          }
  
          else if( Result != AVERROR_EOF )
  
          {
  
              break;
  
          }
  
          else if( Result < 0 )
  
          {
  
              STREAM_ERROR( WriteFailed );
  
          }
  
      } while ( Result == 0);
  
  
  
      return CameraStreamError::Success;
  
  }
  
  
  
  CameraStreamError OutputStream::CloseFile()
  
  {
  
      auto& ID = *m_InternalData;
  
  
  
      while( true )
  
      {
  
          //Flush
  
          int Result = avcodec_send_frame( ID.CodecContext, nullptr );
  
          if( Result == 0 )
  
          {
  
              CameraStreamError StrError = SendAll();
  
              if( StrError != CameraStreamError::Success )
  
              {
  
                  return StrError;
  
              }
  
          }
  
          else if( Result == AVERROR_EOF )
  
          {
  
              break;
  
          }
  
          else
  
          {
  
              STREAM_ERROR( WriteFailed );
  
          }
  
      }
  
  
  
      int Result = av_write_trailer( ID.FormatContext );
  
      if( Result < 0 )
  
      {
  
          STREAM_ERROR( WriteFailed );
  
      }
  
  
  
      if( !(ID.FormatContext->oformat->flags& AVFMT_NOFILE) )
  
      {
  
          Result = avio_close( ID.FormatContext->pb );
  
          if( Result < 0 )
  
          {
  
              STREAM_ERROR( WriteFailed );
  
          }
  
      }
  
  
  
      return CameraStreamError::Success;
  
  }

  Note I’ve simplified a few things and inlined a few bits that were elsewhere. I’ve also removed all the shutdown code as anything that happens after the file is closed is irrelevant.

  Full repo here : https://github.com/IanNorris/Witness If you clone this the issue is with the ’Diagnostics’ output, the Output file is fine. There are two hardcoded paths to X :.

• "moov atom not found" when using av_interleaved_write_frame but not avio_write

  9 octobre 2017, par icStatic

  I am attempting to put together a class that can take arbitrary frames and construct a video from it using the ffmpeg 3.3.3 API. I’ve been struggling to find a good example for this as the examples still seem to be using deprecated functions, so I’ve attempted to patch this using the documentation in the headers and by referring to a few github repos that seem to be using the new version.

  If I use av_interleaved_write_frame to write the encoded packets to the output then ffprobe outputs the following :

  [mov,mp4,m4a,3gp,3g2,mj2 @ 0000000002760120] moov atom not found0
  
  X:\Diagnostics.mp4: Invalid data found when processing input

  ffplay is unable to play the file generated using this method.

  If I instead swap it out for a call to avio_write, ffprobe instead outputs :

  Input #0, h264, from 'X:\Diagnostics.mp4':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: h264 (Main), yuv420p(progressive), 672x380 [SAR 1:1 DAR 168:95], 25 fps, 25 tbr, 1200k tbn, 50 tbc

  ffplay can mostly play this file until it gets towards the end, when it outputs :

  Input #0, h264, from 'X:\Diagnostics.mp4':    0KB sq=    0B f=0/0
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: h264 (Main), yuv420p(progressive), 672x380 [SAR 1:1 DAR 168:95], 25 fps, 25 tbr, 1200k tbn, 50 tbc
  
  [h264 @ 000000000254ef80] error while decoding MB 31 22, bytestream -65
  
  [h264 @ 000000000254ef80] concealing 102 DC, 102 AC, 102 MV errors in I frame
  
      nan M-V:    nan fd=   1 aq=    0KB vq=    0KB sq=    0B f=0/0

  VLC cannot play files from either method. The second method’s file displays a single black frame then hides the video output. The first does not display anything. Neither of them give a video duration.

  Does anyone have any ideas what’s happening here ? I assume my solution is close to working as I’m getting a good chunk of valid frames coming through.

  Code :

  void main()
  
  {
  
      OutputStream Stream( "Output.mp4", 672, 380, 25, true );
  
      Stream.Initialize();
  
  
  
      int i = 100;
  
      while( i-- )
  
      {
  
          //... Generate a frame
  
  
  
          Stream.WriteFrame( Frame );
  
      }
  
      Stream.CloseFile();
  
  }
  
  
  
  OutputStream::OutputStream( const std::string& Path, unsigned int Width, unsigned int Height, int Framerate, bool IsBGR )
  
  : Stream()
  
  , FrameIndex( 0 )
  
  {
  
      auto& ID = *m_InternalData;
  
  
  
      ID.Path = Path;
  
  
  
      ID.Width = Width;
  
      ID.Height= Height;
  
      ID.Framerate.num = Framerate;
  
      ID.Framerate.den = 1;
  
  
  
      ID.PixelFormat = IsBGR ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_RGB24;
  
      ID.CodecID = AV_CODEC_ID_H264;
  
      ID.CodecTag = 0;
  
  
  
      ID.AspectRatio.num = 1;
  
      ID.AspectRatio.den = 1;
  
  }
  
  
  
  CameraStreamError OutputStream::Initialize()
  
  {
  
      av_log_set_callback( &InputStream::LogCallback );
  
      av_register_all();
  
      avformat_network_init();
  
  
  
      auto& ID = *m_InternalData;
  
  
  
      av_init_packet( &ID.Packet );
  
  
  
      int Result = avformat_alloc_output_context2( &ID.FormatContext, nullptr, nullptr, ID.Path.c_str() );
  
      if( Result < 0 || !ID.FormatContext )
  
      {
  
          STREAM_ERROR( UnknownError );
  
      }
  
  
  
      AVCodec* Encoder = avcodec_find_encoder( ID.CodecID );
  
  
  
      if( !Encoder )
  
      {
  
          STREAM_ERROR( NoH264Support );
  
      }
  
  
  
      AVStream* OutStream = avformat_new_stream( ID.FormatContext, Encoder );
  
      if( !OutStream )
  
      {
  
          STREAM_ERROR( UnknownError );
  
      }
  
  
  
      ID.CodecContext = avcodec_alloc_context3( Encoder );
  
      if( !ID.CodecContext )
  
      {
  
          STREAM_ERROR( NoH264Support );
  
      }
  
  
  
      ID.CodecContext->time_base = av_inv_q(ID.Framerate);
  
  
  
      {
  
          AVCodecParameters* CodecParams = OutStream->codecpar;
  
  
  
          CodecParams->width = ID.Width;
  
          CodecParams->height = ID.Height;
  
          CodecParams->format = AV_PIX_FMT_YUV420P;
  
          CodecParams->codec_id = ID.CodecID;
  
          CodecParams->codec_type = AVMEDIA_TYPE_VIDEO;
  
          CodecParams->profile = FF_PROFILE_H264_MAIN;
  
          CodecParams->level = 40;
  
  
  
          Result = avcodec_parameters_to_context( ID.CodecContext, CodecParams );
  
          if( Result < 0 )
  
          {
  
              STREAM_ERROR( EncoderCreationError );
  
          }
  
      }
  
  
  
      if( ID.IsVideo )
  
      {
  
          ID.CodecContext->width = ID.Width;
  
          ID.CodecContext->height = ID.Height;
  
          ID.CodecContext->sample_aspect_ratio = ID.AspectRatio;
  
          ID.CodecContext->time_base = av_inv_q(ID.Framerate);
  
  
  
          if( Encoder->pix_fmts )
  
          {
  
              ID.CodecContext->pix_fmt = Encoder->pix_fmts[0];
  
          }
  
          else
  
          {
  
              ID.CodecContext->pix_fmt = ID.PixelFormat;
  
          }
  
      }
  
      //Snip
  
  
  
      Result = avcodec_open2( ID.CodecContext, Encoder, nullptr );
  
      if( Result < 0 )
  
      {
  
          STREAM_ERROR( EncoderCreationError );
  
      }
  
  
  
      Result = avcodec_parameters_from_context( OutStream->codecpar, ID.CodecContext );
  
      if( Result < 0 )
  
      {
  
          STREAM_ERROR( EncoderCreationError );
  
      }
  
  
  
      if( ID.FormatContext->oformat->flags & AVFMT_GLOBALHEADER )
  
      {
  
          ID.CodecContext->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
  
      }
  
  
  
      OutStream->time_base = ID.CodecContext->time_base;
  
      OutStream->avg_frame_rate= av_inv_q(OutStream->time_base);
  
  
  
      if( !( ID.FormatContext->oformat->flags & AVFMT_NOFILE ) )
  
      {
  
          Result = avio_open( &ID.FormatContext->pb, ID.Path.c_str(), AVIO_FLAG_WRITE );
  
          if( Result < 0 )
  
          {
  
              STREAM_ERROR( FileNotWriteable );
  
          }
  
      }
  
  
  
      Result = avformat_write_header( ID.FormatContext, nullptr );
  
      if( Result < 0 )
  
      {
  
          STREAM_ERROR( WriteFailed );
  
      }
  
  
  
      ID.Output = std::make_unique( ID.CodecContext->width, ID.CodecContext->height, ID.CodecContext->pix_fmt );
  
  
  
      ID.ConversionContext = sws_getCachedContext(
  
          ID.ConversionContext,
  
          ID.Width,
  
          ID.Height,
  
          ID.PixelFormat,
  
          ID.CodecContext->width,
  
          ID.CodecContext->height,
  
          ID.CodecContext->pix_fmt,
  
          SWS_BICUBIC,
  
          NULL,
  
          NULL,
  
          NULL );
  
  
  
      return CameraStreamError::Success;
  
  }
  
  
  
  CameraStreamError OutputStream::WriteFrame( FFMPEG::Frame* Frame )
  
  {
  
      auto& ID = *m_InternalData;
  
  
  
      ID.Output->Prepare();
  
  
  
      int OutputSliceSize = sws_scale( m_InternalData->ConversionContext, Frame->GetFrame()->data, Frame->GetFrame()->linesize, 0, Frame->GetHeight(), ID.Output->GetFrame()->data, ID.Output->GetFrame()->linesize );
  
  
  
      ID.Output->GetFrame()->pts = ID.CodecContext->frame_number;
  
  
  
      int Result = avcodec_send_frame( GetData().CodecContext, ID.Output->GetFrame() );
  
      if( Result == AVERROR(EAGAIN) )
  
      {
  
          CameraStreamError ResultErr = SendAll();
  
          if( ResultErr != CameraStreamError::Success )
  
          {
  
              return ResultErr;
  
          }
  
          Result = avcodec_send_frame( GetData().CodecContext, ID.Output->GetFrame() );
  
      }
  
  
  
      if( Result == 0 )
  
      {
  
          CameraStreamError ResultErr = SendAll();
  
          if( ResultErr != CameraStreamError::Success )
  
          {
  
              return ResultErr;
  
          }
  
      }
  
  
  
      FrameIndex++;
  
  
  
      return CameraStreamError::Success;
  
  }
  
  
  
  CameraStreamError OutputStream::SendAll( void )
  
  {
  
      auto& ID = *m_InternalData;
  
  
  
      int Result;
  
      do 
  
      {
  
          AVPacket TempPacket = {};
  
          av_init_packet( &TempPacket );
  
  
  
          Result = avcodec_receive_packet( GetData().CodecContext, &TempPacket );
  
          if( Result == 0 )
  
          {
  
              av_packet_rescale_ts( &TempPacket, ID.CodecContext->time_base, ID.FormatContext->streams[0]->time_base );
  
  
  
              TempPacket.stream_index = ID.FormatContext->streams[0]->index;
  
  
  
              //avio_write( ID.FormatContext->pb, TempPacket.data, TempPacket.size );
  
              Result = av_interleaved_write_frame( ID.FormatContext, &TempPacket );
  
              if( Result < 0 )
  
              {
  
                  STREAM_ERROR( WriteFailed );
  
              }
  
  
  
              av_packet_unref( &TempPacket );
  
          }
  
          else if( Result != AVERROR(EAGAIN) )
  
          {
  
              continue;
  
          }
  
          else if( Result != AVERROR_EOF )
  
          {
  
              break;
  
          }
  
          else if( Result < 0 )
  
          {
  
              STREAM_ERROR( WriteFailed );
  
          }
  
      } while ( Result == 0);
  
  
  
      return CameraStreamError::Success;
  
  }
  
  
  
  CameraStreamError OutputStream::CloseFile()
  
  {
  
      auto& ID = *m_InternalData;
  
  
  
      while( true )
  
      {
  
          //Flush
  
          int Result = avcodec_send_frame( ID.CodecContext, nullptr );
  
          if( Result == 0 )
  
          {
  
              CameraStreamError StrError = SendAll();
  
              if( StrError != CameraStreamError::Success )
  
              {
  
                  return StrError;
  
              }
  
          }
  
          else if( Result == AVERROR_EOF )
  
          {
  
              break;
  
          }
  
          else
  
          {
  
              STREAM_ERROR( WriteFailed );
  
          }
  
      }
  
  
  
      int Result = av_write_trailer( ID.FormatContext );
  
      if( Result < 0 )
  
      {
  
          STREAM_ERROR( WriteFailed );
  
      }
  
  
  
      if( !(ID.FormatContext->oformat->flags& AVFMT_NOFILE) )
  
      {
  
          Result = avio_close( ID.FormatContext->pb );
  
          if( Result < 0 )
  
          {
  
              STREAM_ERROR( WriteFailed );
  
          }
  
      }
  
  
  
      return CameraStreamError::Success;
  
  }

  Note I’ve simplified a few things and inlined a few bits that were elsewhere. I’ve also removed all the shutdown code as anything that happens after the file is closed is irrelevant.

  Full repo here : https://github.com/IanNorris/Witness If you clone this the issue is with the ’Diagnostics’ output, the Output file is fine. There are two hardcoded paths to X :.