Recherche avancée

Sur d’autres sites (13940)

• Revision 07443f1589 : Refinements on modelcoef expt to reduce storage Uses more aggrerssive interpola

  20 mai 2013, par Deb Mukherjee

  Changed Paths :
   Modify /vp9/common/vp9_entropy.c

  
   Modify /vp9/common/vp9_entropy.h

  
  
  Refinements on modelcoef expt to reduce storage

  Uses more aggrerssive interpolation to reduce storage for the
  model tables by almost more than half. Only 48 lists of probs are
  stored (as opposed to 128 before), corresponding to ONE_NODE
  probabilities of :
  1,
  3, 7, 11, ..., 115, 119,
  127, 135, ..., 247, 255.

  Besides, only 1 table is used as opposed to 2 before. So the overall
  memory needed for the tables is just 48 * 8 = 384 bytes.

  The table currently used is based on a new Pareto distribution with
  heavier tail than a generalized Gaussian - which improves results on
  derf by about 0.1% over a single table Generaized Gaussian.

  Results overall on derfraw300 is -0.14%.

  Change-Id : I19bd03559cbf5894a9f8594b8023dcc3e546f6bd

• Revision f153a5d063 : Make the intra rd search support 8x4/4x8 This commit allows the rate-distortion

  21 mai 2013, par Jingning Han

  Changed Paths :
   Modify /vp9/common/vp9_entropymode.c

  
   Modify /vp9/common/vp9_findnearmv.h

  
   Modify /vp9/decoder/vp9_decodemv.c

  
   Modify /vp9/encoder/vp9_bitstream.c

  
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_modecosts.c

  
   Modify /vp9/encoder/vp9_rdopt.c

  
  
  Make the intra rd search support 8x4/4x8

  This commit allows the rate-distortion optimization of intra coding
  capable of supporting 8x4 and 4x8 partition settings.

  It enables the entropy coding of intra modes in key frame using a
  unified contextual probability model conditioned on its above/left
  prediction modes.

  Coding performance :
  derf 0.464%

  Change-Id : Ieed055084e11fcb64d5d5faeb0e706d30268ba18

• ffmpeg to opengl texture with glTexImage2D

  12 juin 2013, par 2kPi

  I'm trying to make a player in OpenGL. I use ffmpeg to decode the video.

  I searched several tutorial (StackOverflow, ....) how to convert my pFrameRGB-> data [0] texture in OpenGL, but it still shows me a white square. I converted my video to 512x256 to comply with 2 ^ n.

  I know my pFrameRGB is correct because I can create frameX.ppm with "SaveFrame (...)" function.

  I used the following source ( https://github.com/arashafiei/dranger-ffmpeg-tuto/blob/master/tutorial02.c ) code as a model by adapting for my player.

  And this is my source code :

  http://www.sourcepod.com/uagkel22-19078

  Does one of you have a solution to my problem ?

  Edit 1 :

  I delete :

  glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
  
  glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
  
  
  
  glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, 1 ? GL_REPEAT : GL_CLAMP );
  
  glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, 1 ? GL_REPEAT : GL_CLAMP );

  And replaced :

  glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, pCodecCtx->width, pCodecCtx->height, 0, GL_RGB, GL_UNSIGNED_BYTE, pFrameRGB->data[0]);

  by :

  if(firstRendering){
  
  glBindTexture(GL_TEXTURE_2D, texture);
  
  glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB, pCodecCtx->width, pCodecCtx->height, 0, GL_RGB, GL_UNSIGNED_BYTE, pFrameRGB->data[0]);
  
  
  
  firstRendering = 0;
  
  
  
  }else{
  
  
  
  glActiveTexture(texture);
  
  glBindTexture(GL_TEXTURE_2D, texture);
  
  glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0, pCodecCtx->width, pCodecCtx->height, GL_RGB, GL_UNSIGNED_BYTE, pFrameRGB->data[0]);
  
  }

  And i try to run but stiil nothing...