powershell and console app output

Question

Im trying to automate video conversion with powershell and ffmpeg tool. Ffmpeg have detailed output about video if called without all nessesary parameters. Usually it reports about error and display input file info if one specified. Ex I interactively executed such command: d:\video.Enc\ffmpeg.exe -i d:\video.Enc\1.wmv this is powershell console output ``` ffmpeg.exe : FFmpeg version SVN-r20428, Copyright (c) 2000-2009 Fabrice Bellard, et al. row:1 char:24 + d:\video.Enc\ffmpeg.exe <<<< -i d:\video.Enc\1.wmv + CategoryInfo : NotSpecified: (FFmpeg version ...Bel lard, et al.:String) [], RemoteException + FullyQualifiedErrorId : NativeCommandError built on Nov 1 2009 04:03:50 with gcc 4.2.4 configuration: --enable-memalign-hack --prefix=/mingw --cross-pre fix=i686-mingw32- --cc=ccache-i686-mingw32-gcc --target-os=mingw32 --arch=i686 --cpu=i686 --enable-avisynth --enable-gpl --enable-vers ion3 --enable-zlib --enable-bzlib --enable-libgsm --enable-libfaad --enable-pthreads --enable-libvor…

Accepted Answer

Try redirecting the error stream to stdout like so and then you should be able to capture both stdout and stderr in a single variable e.g.:

```
$res = d:\video.Enc\ffmpeg.exe -i d:\video.Enc\1.wmv 2>&1
```

To capture the data try this:

```
$res | Select-String '(?ims)^Stream.*?(\d{3,4}x\d{3,4})' -all | 
    %{$_.matches} | %{$_.Groups[1].Value}
```

I'm not sure if $res will be one string or multiple but the above should work for both cases.

powershell and console app output

Solution

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