Recherche avancée

Sur d’autres sites (1723)

• ffmpeg buffer not released

  11 mars 2013, par ByteByter

  So, I have written a basic decoder for ffmpeg that simply reads the input frames pixel data (Stored using RGB 8 format), and places it directly into the output buffer. (Also RGB 8) The problem is that when I use this decoder in ffmpeg, it says that there is 1 unreleased buffer.(Tested using ffmpeg -i Test.utah Test.png). Unfortunately, I am unsure of what buffer it is talking about, as I am not creating my own buffer. I have tried releasing the AVContext's coded_frame buffer in my decoders closing method, but this causes segmentation faults.

  Any help would be greatly appreciated.

  static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
  
  {
  
      int ret;           /*Hold return from get_buffer */ 
  
      int skipSize;      /*Number of dummy bytes to skip per line*/
  
      int fseek=8;       /*Location of the first pixel*/
  
      int i=0; int j=0;  /*Output buffer seek index/Input Buffer seek index*/
  
      const uint8_t *buf = avpkt->data; /*Hold a pointer to the input buffer*/
  
      AVFrame *pict=data; /*Hold a pointer to the output buffer*/
  
  
  
      /*Set the output pixel format to RGB8*/
  
      avctx->pix_fmt = AV_PIX_FMT_RGB8;
  
  
  
      /*Get the width and height*/
  
      bytestream_get_le32(&buf);
  
      avctx->width=bytestream_get_le16(&buf);
  
      avctx->height=bytestream_get_le16(&buf);
  
  
  
      /*Release the old buffer*/
  
      if (pict->data[0]) avctx->release_buffer(avctx, pict);
  
  
  
      /*Aquire a large enough data buffer to hold the decompressed picture*/
  
      if (ret=ff_get_buffer(avctx, pict) < 0) return ret;
  
      skipSize=pict->linesize[0] - avctx->width; 
  
  
  
      /*Transfer input buffer to output buffer*/
  
      for(int y=0;yheight;y++){
  
          for(int x=0;xwidth;x++){
  
              pict->data[0][i]=avpkt->data[fseek+j];
  
              j++;
  
              i++;
  
          }
  
          i+=skipSize;
  
      }
  
  
  
      /*Inform ffmpeg the output is a key frame and that it is ready for external usage*/
  
      pict->pict_type        = AV_PICTURE_TYPE_I;
  
      pict->key_frame        = 1;
  
      *got_frame=1;
  
      return 0;
  
  }

• Unable to Add ffmpeg dlls for Aforge.net VideoWriter class in VS 2012

  22 mars 2013, par derigible

  I am writing a program that will convert Kinect RGB stream data into a video. I have found lots of pages on using the Aforge.net library to add each BitMap created by the Kinect in the AForge.Video.ffmpeg library. I have added the dll from Aforge.net, but I am still unable to use it because it says the following on the website :

  Note:Make sure you have FFmpeg binaries (DLLs) in the output folder of your application in order to use this class successfully. FFmpeg binaries can be found in Externals folder provided with AForge.NET framework's distribution.

  I have tried to add the ffmpeg DLLs as a reference to the project, but I receive the following error when I do :

  A reference to could not be added. Please make sure that the file is accessible, and that it is a valid assembly or COM component.

  I do not know what this is talking about. It seems like most other examples of using this library assumes you can add it in this manner, but perhaps there is another folder I should put it in ? I am new to C# and am not familiar with how things are referenced in the dlls.

• Evolution #3285 : Virer jquery cookie du core

  13 janvier 2017, par marcimat ☺☮☯♫

  J’ai mis une rétro compatibilité, mais c’est ptet pas si utile que ça de la conserver non plus. À voir.