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• Use argument shortest in C++ code in FFMPEG

  7 juillet 2021, par Little Max

  I need to set up the argument "-shortest" but in c++ code. I know that I can set up an argument with value for example :

  


   av_opt_set(codecContext, "crf", "28", 0);


  


  But here is the thing, there is a value, but in shortest no value.
So how can I set up shortest in c++ code

  


  Thanks in advance

  


• ffmepg binarys can't be implemented in the code

  2 janvier 2016, par yoko

  I am using ffmpeg and C# in my project. I want to write the frames I have imported into a new video. The Problem is, as soon as I want to create a new instance of the VideoFileWriter class, which is delivered by the AForge.Video.FFMPEG namespace, I get a FileNotFoundException (while runtime) :

  System.IO.FileNotFoundException" in System.Windows.Forms.dll

  So, I have researched, and some sourced claim that you need not only to import the dll’s into your project, but also in your output folder(like this one)
  I did it, it did not help either.

  I have already taken a look, I have imported all dll’s into my project, and I have set up their location in the PATH-Variables (And yes, restarted.)

  The Codeline, which is throwing the Exception is the following

  VideoFileWriter writer = new VideoFileWriter();

  anyone else had this Problem or knows a solution ?

• avformat_open_input return value, error code on NaCl Module

  7 février 2016, par Jar

  I’m trying to port FFmpeg into my NaCl module.

  So far, my module linked ffmpeg and SDL libraries.

  It already can play YUV format video which is directed load into memory and copy into YUVOverlay buffer (it’s very easy).

  Now, I want to use ffmpeg to decode video, but when I call the function avformat_open_input it returns -5 when input is URL string, such as rtmp:// or mmsh:// ; it returns -1052488119 when input is file name, such as /saved/tmp (I mount the file system - html5fs).

  ---

  There are some questions :

  1. What means of -5 and -1052488119 ?
  2. If file can’t open by avformat_open_input, is it possible the input type is from buffer not from file name or url string ?

  ---

  If I’m not clearly about my question or description, you can tell me.
  If you are doing the same thing or having the same problem, we can discuss together.

  Thanks,
  Jar