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• Include zlib.h when necessary.

  8 janvier 2013, par Tim Terriberry

  Include zlib.h when necessary.
  Newer versions of png.h don't include it for us.
  
  This is only needed when compiling with OC_DUMP_IMAGES (i.e., for
  
   debugging).
  git-svn-id : http://svn.xiph.org/trunk/theora@18760 0101bb08-14d6-0310-b084-bc0e0c8e3800
  

  • [DH] lib/state.c

• Converting Videos In the Background ROR 3

  2 octobre 2012, par DragonFire353

  I've searched around on google and have come up with only one site that explains how to do this : http://railsonedge.blogspot.com/2009/01/flash-video-tutorial-with-rails-ffmpeg.html?m=0 I'm already using paperclip and already have everything set up with it and like using it better than the way this site is doing it. Is there a way to convert videos in the background while keeping track of the state of it using paperclip ? My Video.rb currently :

  class Video < ActiveRecord::Base
  
    belongs_to :user
  
    has_many :comments, dependent: :destroy
  
    attr_accessible :video, :user_id, :video_file_name, :title, :public, :description, :views
  
  
  
    has_attached_file :video, :styles => { 
  
      :video => { geometry: "800x480>", format: 'webm' },
  
      :thumb => { geometry: "200x200>", format: 'png', time: 3 },
  
    }, processors: [:ffmpeg], url: "/users/:user_id/videos/:id/:basename_:style.:extension"
  
  
  
    #process_in_background :video #causes death
  
  
  
    validates :video, presence: true
  
    validates :description, presence: true, length: { minimum: 5, maximum: 100}
  
    validates :title, presence: true, length: { minimum: 1, maximum: 15 }
  
  
  
    validates_attachment_size :video, less_than: 1.gigabytes
  
    validates_attachment :video, presence: true
  
  
  
    default_scope order: 'created_at DESC'
  
  
  
    Paperclip.interpolates :user_id do |attachment, style|attachment.instance.user_id
  
    end
  
  
  
    def self.search(search)
  
      if search
  
        find(:all, conditions: ["public = 't' AND title LIKE ?", "%#{search}%"], order: "created_at DESC")
  
      else
  
        find(:all, conditions: ["public = 't'"], order: "created_at DESC")
  
      end
  
    end
  
  
  
    def self.admin_search(search)
  
      if search
  
        find(:all, conditions: ['title LIKE ?', "%#{search}%"], order: "created_at DESC")
  
      else
  
        find(:all, order: "created_at DESC")
  
      end
  
    end
  
  
  
  end

• Converting FFmpeg frame to OpenGL ES texture

  10 juillet 2015, par joe

  I’m trying to convert from a video using FFmpeg to an OpenGL ES texture in jni, but all that I get is a black texture. I have output the OpenGL with the glGetError(), but there is no error.

  Here is my code :

  void* pixels;
  
  int err;
  
  int i;
  
  int frameFinished = 0;
  
  AVPacket packet;
  
  static struct SwsContext *img_convert_ctx;
  
  static struct SwsContext *scale_context = NULL;
  
  int64_t seek_target;
  
  
  
   int target_width = 320;
  
   int target_height = 240;
  
   GLenum error = GL_NO_ERROR;
  
   sws_freeContext(img_convert_ctx);  
  
  
  
  i = 0;
  
  while((i==0) && (av_read_frame(pFormatCtx, &packet)>=0)) {
  
          if(packet.stream_index==videoStream) {
  
          avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
  
  
  
          if(frameFinished) {
  
              LOGI("packet pts %llu", packet.pts);
  
              img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, 
  
                     pCodecCtx->pix_fmt, 
  
                     target_width, target_height, PIX_FMT_RGB24, SWS_BICUBIC, 
  
                     NULL, NULL, NULL);
  
              if(img_convert_ctx == NULL) {
  
                  LOGE("could not initialize conversion context\n");
  
                  return;
  
              }
  
                  sws_scale(img_convert_ctx, (const uint8_t* const*)pFrame->data, pFrame->linesize, 0, pCodecCtx->height, pFrameRGB->data, pFrameRGB->linesize);
  
                  LOGI("sws_scale");
  
  
  
                  videoTextures = new Texture*[1];
  
                  videoTextures[0]->mWidth = 256; //(unsigned)pCodecCtx->width;
  
                  videoTextures[0]->mHeight = 256; //(unsigned)pCodecCtx->height;
  
                  videoTextures[0]->mData = pFrameRGB->data[0];
  
  
  
                  glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
  
  
  
                  glGenTextures(1, &(videoTextures[0]->mTextureID));
  
                  glBindTexture(GL_TEXTURE_2D, videoTextures[0]->mTextureID);
  
                  glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 
  
                  glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
  
  
  
                  if(0 == got_texture)
  
                  {
  
                      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, videoTextures[0]->mWidth, videoTextures[0]->mHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid *)videoTextures[0]->mData);
  
  
  
                      glTexSubImage2D(GL_TEXTURE_2D, 0, 0,0, videoTextures[0]->mWidth, videoTextures[0]->mHeight, GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid *)videoTextures[0]->mData);
  
                  }else
  
                  {
  
                      glTexSubImage2D(GL_TEXTURE_2D, 0, 0,0, videoTextures[0]->mWidth, videoTextures[0]->mHeight, GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid *)videoTextures[0]->mData);
  
  
  
                  }
  
  
  
                  i = 1;
  
                  error = glGetError();
  
                  if( error != GL_NO_ERROR ) {
  
                      LOGE("couldn't create texture!!");
  
                         switch (error) {
  
                          case GL_INVALID_ENUM:
  
                          LOGE("GL Error: Enum argument is out of range");
  
                          break;
  
                          case GL_INVALID_VALUE:
  
                              LOGE("GL Error: Numeric value is out of range");
  
                          break;
  
                          case GL_INVALID_OPERATION:
  
                              LOGE("GL Error: Operation illegal in current state");
  
                          break;
  
                          case GL_OUT_OF_MEMORY:
  
                              LOGE("GL Error: Not enough memory to execute command");
  
                          break;
  
                          default:
  
                              break;
  
                         }
  
                  }
  
          }
  
      }
  
      av_free_packet(&packet);
  
  }

  I have succeeded in changing pFrameRGB to a java bitmap， but I just want to change it to a texture in the c code.

  Edit1 I have output the Texture ID, it is 0 ; could texture ID be zero ? I changed my code
  but it always be zero.

  Edit2
  the Texture display, but it is a mess.