Question

我正在尝试创建一个使用ffmpeg的函数，到目前为止，除了-version命令之外，我还没有能够正常工作。当我尝试运行一个简单的ffmpeg -i {input file path} {output file path}命令时，该函数似乎陷入3-4分钟（在创建空输出文件的过程中），然后再次尝试并产生错误'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，如果有人可以告诉我我做错了什么或如何让这个过程工作，将不胜感激。提前谢谢，Cuan

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这个过程在不到半分钟的时间内运行，显然有些东西导致功能过程挂起，如果有人有建议，我会非常感激。再次感谢，Cuan。

第二次编辑：我尝试将-y添加到我的命令的末尾，这样做的原因在于它不再抱怨覆盖，但是它现在只是由于超时而挂起两次。（在底部输出）

编辑第三个：azure有一种让你在本地运行函数的方法，我的函数遇到了本地版本的相同问题但是：因为事实证明实际的处理是在几秒钟内完成的，它只需要永远决定写入文件 - 如果在进程运行约10秒后手动终止进程，则会立即写入文件。再次，任何帮助表示赞赏。爨。

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();
}

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（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.

Answer 1

文件'tmpOut2.mp4'已存在。覆盖？ [y / N]不覆盖 - 退出

您可以使用命令添加-y选项来覆盖输出文件，而不要求如下：

ffmpeg -i {input file path} {output file path} -y

有关更多选项，请参阅here。

此外，您可以利用kudu来测试转化，如下所示：

2017-10-14T02：22：10.610 Microsoft.Azure.WebJobs.Host：函数超出了超时值00:05:00：Functions.HttpTestFunction。

您似乎正在使用动态SKU。正如host.json提到functionTimeout如下：

表示所有功能的超时持续时间的值。


在动态SKU中，有效范围为1秒至10分钟，默认值为5分钟。

在付费SKU中没有限制，默认值为空（表示没有超时）。

注意：如果对话花费了大量时间，则需要增加functionTimeout或更改SKU类型。此外，对于付费SKU，您需要启用始终开启功能，有关详细信息，请参阅here。

Answer 2

事实证明，整个问题都是由

引起的

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

ffmpeg运行时有很多输出/错误消息，这会导致缓冲区重载并导致整个事情挂起。解决方案是使事件按事件发生

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＆＃39; ReadToEnd（）＆＃39;解决了我所有的问题，它现在正常工作，输出和错误行仍然被捕获。

Azure函数调用上的FFmpeg运行缓慢并生成一个空输出文件

2 个答案: