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• FFmpeg on Azure Function call running slowly and producing an empty output file

  7 novembre 2017, par The Lemon

  I’m trying to make a function which uses ffmpeg, so far I haven’t been able to get anything other than the -version command to work properly. When I try to run a simple ffmpeg -i {input file path} {output file path} command, the function seems to get stuck for 3-4 minutes (in the process creating an empty output file), then try again and produce the error ’file already exists’. I’ve tried switching between the 64 bit ffmpeg.exe and the 32 bit ffmpeg.exe with the function running as both a 32 and 64 bit function. My code and the associated logs from trying to run the code are included below, if anyone can tell me what I’m doing wrong or how to get the process to work it would be greatly appreciated. Thanks in advance, Cuan

  edit : The process works on kudu with the same files, the output is shown at the bottom. On kudu the process ran in under half a minute, clearly something is causing the function process to hang, if anyone has advice it would be greatly appreciated. Thanks again, Cuan.

  second edit : I tried adding the -y to the end of my command, this works in that it no longer complains about overwriting, but alas it now just hangs twice due to timeout. (output at the bottom)

  edit the third : azure has a way to let you run functions locally, my function ran into the same issues on the local version but : as it turns out the actual processing is done within a few seconds, it just takes forever to decide to write to a file - if you terminate the process manually after the process had been running for 10 seconds the file immediately gets written. Again, any help is appreciated. Cuan.

  Run.csx :

  using System.Net;
  
  using System;
  
  using System.Diagnostics;
  
  using System.ComponentModel;
  
  public static async Task<httpresponsemessage> Run(HttpRequestMessage req, TraceWriter log)
  
  {
  
      log.Info("C# HTTP trigger function processed a request.");
  
      Process process = new Process();
  
      process.StartInfo.FileName = @"D:\home\site\wwwroot\HttpTestFunction\ffmpeg64.exe";
  
      string tmp = String.Format("-i \"" + "Airdocs Background Video.mp4" + "\" \"" + "tmpOut2.mp4" + "\"");
  
      log.Info("ffmpeg argument is: "+tmp);
  
      process.StartInfo.Arguments = tmp;
  
      process.StartInfo.UseShellExecute = false;
  
      process.StartInfo.RedirectStandardOutput = true;
  
      process.StartInfo.RedirectStandardError = true;
  
      process.StartInfo.WorkingDirectory = @"D:\home\site\wwwroot\HttpTestFunction";
  
      process.Start();
  
      log.Info("process started");
  
      string output = process.StandardOutput.ReadToEnd();
  
      string err = process.StandardError.ReadToEnd();
  
      log.Info("output:" + output);
  
      log.Info("error:"+err);
  
      process.WaitForExit();
  
  }
  
  </httpresponsemessage>

  Logs :

  2017-10-14T02:17:10.514 Function started (Id=e4ec7d1e-2bcb-4b74-8af2-15124f1576fb)
  
  2017-10-14T02:17:10.639 C# HTTP trigger function processed a request.
  
  2017-10-14T02:17:10.639 ffmpeg argument is: -i "Airdocs Background Video.mp4" "tmpOut2.mp4"
  
  2017-10-14T02:17:10.779 process started
  
  2017-10-14T02:18:15  No new trace in the past 1 min(s).
  
  2017-10-14T02:19:15  No new trace in the past 2 min(s).
  
  2017-10-14T02:20:15  No new trace in the past 3 min(s).
  
  2017-10-14T02:21:02.188 Function started (Id=b2ae9b59-8933-42e3-986c-fd26a6886285)
  
  2017-10-14T02:21:02.188 C# HTTP trigger function processed a request.
  
  2017-10-14T02:21:02.188 ffmpeg argument is: -i "Airdocs Background Video.mp4" "tmpOut2.mp4"
  
  2017-10-14T02:21:02.252 process started
  
  2017-10-14T02:21:02.377 output:
  
  2017-10-14T02:21:02.377 error:ffmpeg version N-87353-g183fd30 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 7.2.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib
  
    libavutil      55. 76.100 / 55. 76.100
  
    libavcodec     57.106.101 / 57.106.101
  
    libavformat    57. 82.101 / 57. 82.101
  
    libavdevice    57.  8.101 / 57.  8.101
  
    libavfilter     6.105.100 /  6.105.100
  
    libswscale      4.  7.103 /  4.  7.103
  
    libswresample   2.  8.100 /  2.  8.100
  
    libpostproc    54.  6.100 / 54.  6.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Airdocs Background Video.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: mp41isom
  
      creation_time   : 2017-09-08T11:55:11.000000Z
  
    Duration: 00:00:24.02, start: 0.000000, bitrate: 105 kb/s
  
      Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 104 kb/s, 30.30 fps, 30.30 tbr, 30k tbn, 60 tbc (default)
  
      Metadata:
  
        creation_time   : 2017-09-08T11:55:11.000000Z
  
        handler_name    : VideoHandler
  
        encoder         : AVC Coding
  
  File 'tmpOut2.mp4' already exists. Overwrite ? [y/N] Not overwriting - exiting
  
  2017-10-14T02:21:02.392 Function completed (Success, Id=b2ae9b59-8933-42e3-986c-fd26a6886285, Duration=205ms)
  
  2017-10-14T02:22:10.563 Function completed (Failure, Id=e4ec7d1e-2bcb-4b74-8af2-15124f1576fb, Duration=300047ms)
  
  2017-10-14T02:22:10.610 Microsoft.Azure.WebJobs.Host: Timeout value of 00:05:00 was exceeded by function: Functions.HttpTestFunction.

  Kudu code (just running the ffmpeg command directly, not the run.csx file) :

  D:\home\site\wwwroot\HttpTestFunction>ffmpeg -i "Airdocs Background Video.mp4" tmpout3.mp4
  
  
  
  
  
  ffmpeg version N-87196-g6cadbb1 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 7.1.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
  
    libavutil      55. 74.100 / 55. 74.100
  
    libavcodec     57.105.100 / 57.105.100
  
    libavformat    57. 81.100 / 57. 81.100
  
    libavdevice    57.  8.100 / 57.  8.100
  
    libavfilter     6.101.100 /  6.101.100
  
    libswscale      4.  7.103 /  4.  7.103
  
    libswresample   2.  8.100 /  2.  8.100
  
    libpostproc    54.  6.100 / 54.  6.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Airdocs Background Video.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: mp41isom
  
      creation_time   : 2017-09-08T11:55:11.000000Z
  
    Duration: 00:00:24.02, start: 0.000000, bitrate: 105 kb/s
  
      Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 104 kb/s, 30.30 fps, 30.30 tbr, 30k tbn, 60 tbc (default)
  
      Metadata:
  
        creation_time   : 2017-09-08T11:55:11.000000Z
  
        handler_name    : VideoHandler
  
        encoder         : AVC Coding
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 00000000005fc5a0] using SAR=1/1
  
  [libx264 @ 00000000005fc5a0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 00000000005fc5a0] profile High, level 3.2
  
  [libx264 @ 00000000005fc5a0] 264 - core 152 r2851 ba24899 - 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=1 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=25 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 'tmpout3.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: mp41isom
  
      encoder         : Lavf57.81.100
  
      Stream #0:0(und): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 30.30 fps, 16k tbn, 30.30 tbc (default)
  
      Metadata:
  
        creation_time   : 2017-09-08T11:55:11.000000Z
  
        handler_name    : VideoHandler
  
        encoder         : Lavc57.105.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  frame=  728 fps= 39 q=29.0 Lsize=      62kB time=00:00:23.92 bitrate=  21.1kbits/s speed=1.28x    
  
  video:52kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 17.915474%
  
  [libx264 @ 00000000005fc5a0] frame I:4     Avg QP:12.46  size:  6102
  
  [libx264 @ 00000000005fc5a0] frame P:184   Avg QP:16.94  size:    45
  
  [libx264 @ 00000000005fc5a0] frame B:540   Avg QP:20.50  size:    37
  
  [libx264 @ 00000000005fc5a0] consecutive B-frames:  1.1%  0.0%  0.0% 98.9%
  
  [libx264 @ 00000000005fc5a0] mb I  I16..4: 66.3% 30.4%  3.3%
  
  [libx264 @ 00000000005fc5a0] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  0.0%  0.0%  0.0%  0.0%  0.0%    skip:100.0%
  
  [libx264 @ 00000000005fc5a0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.0%  0.0%  0.0%  direct: 0.0%  skip:100.0%  L0:12.3% L1:87.7% BI: 0.0%
  
  [libx264 @ 00000000005fc5a0] 8x8 transform intra:30.5% inter:14.3%
  
  [libx264 @ 00000000005fc5a0] coded y,uvDC,uvAC intra: 2.3% 2.2% 2.1% inter: 0.0% 0.0% 0.0%
  
  [libx264 @ 00000000005fc5a0] i16 v,h,dc,p: 93%  6%  2%  0%
  
  [libx264 @ 00000000005fc5a0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 41% 31%  0%  0%  0%  0%  0%  0%
  
  [libx264 @ 00000000005fc5a0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 39% 17% 16%  5%  4%  5%  6%  3%  5%
  
  [libx264 @ 00000000005fc5a0] i8c dc,h,v,p: 93%  6%  1%  0%
  
  [libx264 @ 00000000005fc5a0] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 00000000005fc5a0] ref B L1: 98.2%  1.8%
  
  [libx264 @ 00000000005fc5a0] kb/s:17.57
  
  
  
  
  
  
  
  D:\home\site\wwwroot\HttpTestFunction> 

  Output on azure with the -y command

  2017-10-25T04:34:45.519 Compilation succeeded.
  
  2017-10-25T04:34:46.160 Function started (Id=18880991-c93a-42a3-96b6-7df283e3bdb4)
  
  2017-10-25T04:34:46.300 C# HTTP trigger function processed a request.
  
  2017-10-25T04:34:46.300 ffmpeg argument is: -i "Airdocs Background Video.mp4" "tmpOut2.mp4" -y
  
  2017-10-25T04:34:46.394 process started
  
  2017-10-25T04:36:46  No new trace in the past 1 min(s).
  
  2017-10-25T04:37:46  No new trace in the past 2 min(s).
  
  2017-10-25T04:38:37.947 Function started (Id=c7f7f768-c53b-4074-a0c2-8391848bbd80)
  
  2017-10-25T04:38:37.963 C# HTTP trigger function processed a request.
  
  2017-10-25T04:38:37.963 ffmpeg argument is: -i "Airdocs Background Video.mp4" "tmpOut2.mp4" -y
  
  2017-10-25T04:38:38.025 process started
  
  2017-10-25T04:39:46  No new trace in the past 1 min(s).
  
  2017-10-25T04:39:46.258 Function completed (Failure, Id=18880991-c93a-42a3-96b6-7df283e3bdb4, Duration=300079ms)
  
  2017-10-25T04:39:46.321 Microsoft.Azure.WebJobs.Host: Timeout value of 00:05:00 was exceeded by function: Functions.HttpTestFunction.

• avcodec/huffyuvenc : sub_left_prediction_bgr32, call dsp after 32 first byte of the...

  2 décembre 2017, par Martin Vignali

  avcodec/huffyuvenc : sub_left_prediction_bgr32, call dsp after 32 first byte of the line in order to try to call the align version (diff bytes have avx2 version)
  

  • [DH] libavcodec/huffyuvenc.c

• Call to avformat_find_stream_info prevents decoding of simple PNG image ?

  10 avril 2014, par kloffy

  I am running into a problem decoding a simple PNG image with libav. The decode_ok flag after the call to avcodec_decode_video2 is set to 0, even though the packet contains the entire image. Through some experimentation, I have managed to pinpoint the issue and it seems related to calling avformat_find_stream_info. If the call is removed, the example runs successfully. However, I would like to use the same code for other media, and calling avformat_find_stream_info is recommended in the documentation.

  The following minimal example illustrates the behavior (unfortunately still a bit lengthy) :

  #include <iostream>
  
  
  
  extern "C"
  
  {
  
  #include <libavformat></libavformat>avformat.h>
  
  #include <libavcodec></libavcodec>avcodec.h>
  
  }
  
  
  
  // Nothing to see here, it&#39;s just a helper function
  
  AVCodecContext* open(AVMediaType mediaType, AVFormatContext* formatContext)
  
  {
  
      auto ret = 0;
  
      if ((ret = av_find_best_stream(formatContext, mediaType, -1, -1, nullptr, 0)) &lt; 0)
  
      {
  
          std::cerr &lt;&lt; "Failed to find video stream." &lt;&lt; std::endl;
  
          return nullptr;
  
      }
  
  
  
      auto codecContext = formatContext->streams[ret]->codec;
  
      auto codec = avcodec_find_decoder(codecContext->codec_id);
  
      if (!codec)
  
      {
  
          std::cerr &lt;&lt; "Failed to find codec." &lt;&lt; std::endl;
  
          return nullptr;
  
      }
  
  
  
      if ((ret = avcodec_open2(codecContext, codec, nullptr)) != 0)
  
      {
  
          std::cerr &lt;&lt; "Failed to open codec context." &lt;&lt; std::endl;
  
          return nullptr;
  
      }
  
  
  
      return codecContext;
  
  }
  
  
  
  // All the interesting bits are here
  
  int main(int argc, char* argv[])
  
  {
  
      auto path = "/path/to/test.png"; // Replace with valid path to PNG
  
      auto ret = 0;
  
  
  
      av_log_set_level(AV_LOG_DEBUG);
  
  
  
      av_register_all();
  
      avcodec_register_all();
  
  
  
      auto formatContext = avformat_alloc_context();
  
      if ((ret = avformat_open_input(&amp;formatContext, path, NULL, NULL)) != 0)
  
      {
  
          std::cerr &lt;&lt; "Failed to open input." &lt;&lt; std::endl;
  
          return -1;
  
      }
  
      av_dump_format(formatContext, 0, path, 0);
  
  
  
  //*/ Info is successfully found, but interferes with decoding
  
      if((ret = avformat_find_stream_info(formatContext, nullptr)) &lt; 0)
  
      {
  
          std::cerr &lt;&lt; "Failed to find stream info." &lt;&lt; std::endl;
  
          return -1;
  
      }
  
      av_dump_format(formatContext, 0, path, 0);
  
  //*/
  
  
  
      auto codecContext = open(AVMEDIA_TYPE_VIDEO, formatContext);
  
  
  
      AVPacket packet;
  
      av_init_packet(&amp;packet);
  
  
  
      if ((ret = av_read_frame(formatContext, &amp;packet)) &lt; 0)
  
      {
  
          std::cerr &lt;&lt; "Failed to read frame." &lt;&lt; std::endl;
  
          return -1;
  
      }
  
  
  
      auto frame = av_frame_alloc();
  
      auto decode_ok = 0;
  
      if ((ret = avcodec_decode_video2(codecContext, frame, &amp;decode_ok, &amp;packet)) &lt; 0 || !decode_ok)
  
      {
  
          std::cerr &lt;&lt; "Failed to decode frame." &lt;&lt; std::endl;
  
          return -1;
  
      }
  
  
  
      av_frame_free(&amp;frame);
  
      av_free_packet(&amp;packet);
  
  
  
      avcodec_close(codecContext);
  
  
  
      avformat_close_input(&amp;formatContext);
  
      av_free(formatContext);
  
  
  
      return 0;
  
  }
  
  </iostream>

  The format dump before avformat_find_stream_info prints :

  Input #0, image2, from '/path/to/test.png' :
    Duration : N/A, bitrate : N/A
      Stream #0:0, 0, 1/25 : Video : png, 25 tbn

  The format dump after avformat_find_stream_info prints :

  Input #0, image2, from '/path/to/test.png' :
    Duration : 00:00:00.04, start : 0.000000, bitrate : N/A
      Stream #0:0, 1, 1/25 : Video : png, rgba, 512x512 [SAR 3780:3780 DAR 1:1], 1/25, 25 tbr, 25 tbn, 25 tbc

  So it looks like the search yields potentially useful information. Can anybody shed some light on this problem ? Other image formats seem to work fine. I assume that this is a simple user error rather than a bug.

  Edit : Debug logging was already enabled, but the PNG decoder does not produce a lot of output. I have also tried setting a custom logging callback.

  Here is what I get without the call to avformat_find_stream_info, when decoding succeeds :

  Statistics : 52125 bytes read, 0 seeks

  And here is what I get with the call to avformat_find_stream_info, when decoding fails :

  Statistics : 52125 bytes read, 0 seeks
  detected 8 logical cores
  

  The image is 52125 bytes, so the whole file is read. I am not sure what the logical cores are referring to.