Newest 'ffmpeg' Questions - Stack Overflow

Les articles publiés sur le site

• ffmprg commad with colorchannelmixer

  12 décembre 2013, par bindal

  I am using following command: command = "ffmpeg -y -i "+strFinalPath+" -vf colorchannelmixer=.3:.4:.3:0:.3:.4:.3:0:.3:.4:.3 "+strRotatePath;

  But this command exit with error code 1

  is there any mistake in this command

  Please suggest me

  Thanks

• JAVE Library - NullPointerException while trying to convert .mp3 to .ogg

  12 décembre 2013, par Xenocider

  I'm trying to make a basic program in java that will convert a .mp3 file into a .ogg file. I am on a Mac using a ffmpeg that was compiled for it from ffmpegmac.net. When I try to run my code I get a NullPointerException. I also noticed that .getAudioEncoders() return an empty string perhaps this has something to do with the error.

  Exception in thread "main" java.lang.NullPointerException
      at java.lang.ProcessBuilder.start(ProcessBuilder.java:1010)
      at java.lang.Runtime.exec(Runtime.java:615)
      at java.lang.Runtime.exec(Runtime.java:483)
      at it.sauronsoftware.jave.FFMPEGExecutor.execute(FFMPEGExecutor.java:103)
      at it.sauronsoftware.jave.Encoder.encode(Encoder.java:829)
      at it.sauronsoftware.jave.Encoder.encode(Encoder.java:713)
      at Main.main(Main.java:33)
  

  This is my code I use:

  public static void main(String[] args) throws IllegalArgumentException, InputFormatException, EncoderException {
  Encoder encoder = new Encoder(new FFMPEGExecutableLocator());
  //Encoder encoder = new Encoder();
  EncodingAttributes encodingAttributes = new EncodingAttributes();
  AudioAttributes audioAttributes = new AudioAttributes();
  
  String[] audioEncoders = encoder.getAudioEncoders();
  System.out.print(audioEncoders.length);
  for (int i = 0; icode>

  Any ideas or help would be appreciated! Thanks!

• FFmpeg Decode Temporary File - C++

  11 décembre 2013, par user2492388

  I have a buffer and the size of the buffer in my memory and I want to decode this data a raw file. With this: http://www.ffmpeg.org/doxygen/trunk/doc_2examples_2demuxing_8c-example.html or this: http://www.ffmpeg.org/doxygen/trunk/doc_2examples_2decoding_encoding_8c-example.html I decode a file from my disk. But how can I decode a temporary file which buffer is only in the memory?

• FFmpeg av_read_frame returns a size but no data ?

  11 décembre 2013, par tommed

  I have written some C code to access ffmpeg and wrapped it in a C++/CLI (.NET managed) class. The program fetches a live video stream and extracts frames and converts them to PNG files.

  Unfortunately the images that are saved to disk are always black (opening them in Notepad++ shows that they are full of nulls).

  I am using the assemblies aformat/codec-55.dll and the development headers and libs for compilation from ffmpeg-20131120-git-e502783-win64-dev. The whole project is compiled using Managed C++ (Cpp/cli) .NET 4.0 for 64-bit.

  After some investigation the problem appears to be that av_read_frame fills the AVPacket->size value correctly, but the AVPAcket->data is always null. When the frame is finished (got==1) then the data for the AVFrame is just a matrix of nulls. :(

  Here is the code: Example code (sorry, but it didnt paste well into SO)

  I think the problem is at line 34 when the packet is returned like so:

  Please, how can I get this to work? What have I done wrong?

• Apply effects using ffmpeg [on hold]

  11 décembre 2013, par bindal

  I have used ffmpeg recorder for recording video in my application, Through ffmpeg commnad i can trim , rotate and concate my videos but i want to apply some effects like:

  Black & White
  Sepia 
  Old Movie
  Noise 
  Brightness
  Thermal
  Xray
  Pencil
  Gamma
  Contrast
  Saturation
  Emboss
  

  Please suggest me any documentation of ffmpeg,

  Thanks Bindal