azure - Azure 函数调用上的 FFmpeg 运行缓慢并产生一个空的输出文件

标签 azure video ffmpeg azure-functions

我正在尝试制作一个使用 ffmpeg 的函数,到目前为止,除了 -version 命令之外,我无法让其他任何东西正常工作。当我尝试运行一个简单的 ffmpeg -i {input file path} {output file path}命令,该函数似乎卡住了 3-4 分钟(在创建空输出文件的过程中),然后重试并产生错误“文件已存在”。我尝试在 64 位 ffmpeg.exe 和 32 位 ffmpeg.exe 之间切换,该函数同时作为 32 位和 64 位函数运行。我的代码和尝试运行代码的相关日志包含在下面,如果有人能告诉我我做错了什么或如何让该过程正常工作,将不胜感激。预先感谢, 川

编辑:该过程适用于具有相同文件的 kudu,输出显示在底部。在 kudu 上,该过程在半分钟内运行,显然是某些原因导致函数进程挂起,如果有人有建议,将不胜感激。再次感谢,川。

第二次编辑:我尝试将 -y 添加到命令的末尾,这样做的原因是它不再提示覆盖,但可惜它现在由于超时而挂起两次。 (底部输出)

编辑第三个:azure 有一种方法可以让您在本地运行函数,我的函数在本地版本上遇到了同样的问题,但是:事实证明,实际处理是在几秒钟内完成的,决定编写只需要很长时间到文件 - 如果您在进程运行约 10 秒后手动终止进程,则文件会立即被写入。再次感谢任何帮助。爨。

运行.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();
}

日志:
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 代码(只是直接运行 ffmpeg 命令,而不是 run.csx 文件):
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> 

使用 -y 命令在 azure 上输出
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.

最佳答案

事实证明,整个问题是由

string output = process.StandardOutput.ReadToEnd();
string err = process.StandardError.ReadToEnd();

ffmpeg 运行时有很多输出/错误消息,这使缓冲区重载并导致整个事情挂起。解决方案是让这个过程一个接一个地发生
process.OutputDataReceived += new DataReceivedEventHandler(
    (s, e) => 
    { 
        log.Info("O: "+e.Data);
    }
);
process.ErrorDataReceived += new DataReceivedEventHandler(
    (s, e) => 
    { 
        log.Info("E: "+e.Data);
    }
);
//start process
process.Start();
log.Info("process started");
process.BeginOutputReadLine();
process.BeginErrorReadLine();
process.WaitForExit();

使用它而不是 'ReadToEnd()' 解决了我所有的问题,它现在可以正常工作,并且仍在捕获输出和错误行。

关于azure - Azure 函数调用上的 FFmpeg 运行缓慢并产生一个空的输出文件,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/46740311/

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