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• avconv_opt : Allow printing private options

  14 septembre 2015, par Vittorio Giovara

  avconv_opt : Allow printing private options
  Add an allowed parameter to -h and —help avconv option to print private
  
  options from a codec, format, or filter, named with the provided input
  
  value.
  In case multiple classes are found (eg. mov demuxer and mov muxer, or
  
  h264 decoder and h264 demuxer) print all options from all classes.
  
  It is possible to select the type of class to print by adding it
  
  before the name (eg. demuxer:mov and muxer:mov, or decoder:h264and
  
  demuxer:h264).
  Signed-off-by : Vittorio Giovara <vittorio.giovara@gmail.com>
  

  • [DBH] avconv_opt.c

• Python, FFMPEG : Redirecting output of FFMPEG subprocess call to a string

  31 décembre 2019, par user1452030

  I’ve managed to run an FFMPEG command using the subprocess module as shown below :

  output = subprocess.check_output(command, shell=True)

  This works fine, but it prints the verbose FFMPEG output to console. The program I’m writing is supposed to run for hundreds/thousands of files in a batch and I don’t want detailed outputs for every file processed, unless the user chooses to do so. Can I redirect the console outputs and errors to strings, so that I can decide when I should and shouldn’t print them ?

  This might be lame, but I tried the following snippet :

  outputBuffer = BytesIO()
  
  output = subprocess.check_output(command, shell=True, stdout=outputBuffer)

  But it gave me the following error :

  ValueError: stdout argument not allowed, it will be overridden.

  I saw other examples where the POpen interface was used, but given that I’m not communicating with the external command as it is running, and that I need to run this for a large number of items, I’d prefer something simpler, if possible.

  Thanks in advance !

  Note : I’ve found lots of questions in this broad topic, but I couldn’t find anything perfectly relevant to my situation.

• FFmpegInteropX in Unity Hololens 2

  25 juin 2024, par CocoaMilka

  I'm building a UDP video stream decoder for the Hololens 2 in Unity 2021. I've compiled FFmpegInteropX for ARM64 UWP, however I'm having issues setting it up within Unity. With the binaries included in /Plugins/WSA I get the following error :

  


  ArgumentException: The Assembly WinRT.Runtime is referenced by FFmpegInteropX.DotNet ('Assets/Plugins/WSA/FFmpegInteropX.DotNet/Release/FFmpegInteropX.DotNet.dll'). But the dll is not allowed to be included or could not be found.

  


  I've wrapped all of my WinRT dependent code with the appropriate preprocessor directive as shown here, and I've also set all my plugins to target WSAPlayer and UWP.

  


  #if ENABLE_WINMD_SUPPORT
using FFmpegInteropX;
using WinRT;
using Windows.Foundation;
using Windows.Media.Core;
using Windows.Media.Playback;
using System.Threading.Tasks;
#endif


  


  If I include WinRT.Runtime.dll in the plugins folder, the issue spreads asking for more dependencies then the new dependencies (such as Microsoft.Windows.SDK.NET.dll) starts conflicting with the MRTK packages due to it also depending on WinRT.

  


  How can I use this library within Unity without constantly running into dependency hell ?