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• Revision dae17734ec: New mode_info_context storage mode_info_context was stored as a grid of MODE_IN

  6 September 2013, by Scott LaVarnway

  Changed Paths:
   Modify /vp9/common/vp9_alloccommon.c

  
   Modify /vp9/common/vp9_alloccommon.h

  
   Modify /vp9/common/vp9_blockd.h

  
   Modify /vp9/common/vp9_debugmodes.c

  
   Modify /vp9/common/vp9_entropymode.c

  
   Modify /vp9/common/vp9_findnearmv.c

  
   Modify /vp9/common/vp9_findnearmv.h

  
   Modify /vp9/common/vp9_loopfilter.c

  
   Modify /vp9/common/vp9_mvref_common.c

  
   Modify /vp9/common/vp9_onyxc_int.h

  
   Modify /vp9/common/vp9_pred_common.c

  
   Modify /vp9/common/vp9_pred_common.h

  
   Modify /vp9/common/vp9_reconinter.c

  
   Modify /vp9/decoder/vp9_decodemv.c

  
   Modify /vp9/decoder/vp9_decodframe.c

  
   Modify /vp9/decoder/vp9_detokenize.c

  
   Modify /vp9/decoder/vp9_onyxd_if.c

  
   Modify /vp9/encoder/vp9_bitstream.c

  
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_encodeintra.c

  
   Modify /vp9/encoder/vp9_encodemb.c

  
   Modify /vp9/encoder/vp9_encodemv.c

  
   Modify /vp9/encoder/vp9_firstpass.c

  
   Modify /vp9/encoder/vp9_mbgraph.c

  
   Modify /vp9/encoder/vp9_mcomp.c

  
   Modify /vp9/encoder/vp9_onyx_if.c

  
   Modify /vp9/encoder/vp9_quantize.c

  
   Modify /vp9/encoder/vp9_rdopt.c

  
   Modify /vp9/encoder/vp9_segmentation.c

  
   Modify /vp9/encoder/vp9_temporal_filter.c

  
   Modify /vp9/encoder/vp9_tokenize.c

  
  
  New mode_info_context storage

  mode_info_context was stored as a grid of MODE_INFO structs.
  The grid now constists of a pointer to a MODE_INFO struct and
  a "in the image" flag. The MODE_INFO structs are now stored
  as a stream, eliminating unnecessary copies and is a little
  more cache friendly.

  For the test clips used, the decoder performance improved
  by 4.3% (1080p) and 9.7% (720p).

  Patch Set 2: Re-encoded clips with latest. Now 1.7% (1080p)
  and 5.9% (720p).

  Change-Id: I846f29e88610fce2523ca697a9a9ef2a182e9256

• Encode using ffmpeg surface stored in IDXGISurface

  2 February 2023, by Alexandru-Marian Buza

  AcquiredBuffer.Attach(Buffer.MetaData.pSurface);
IDXGISurface* surface;
            DXGI_MAPPED_RECT cpuImage;
            AcquiredBuffer->QueryInterface(IID_PPV_ARGS(&surface));
            surface->Unmap();
            hr = surface->Map(&cpuImage, DXGI_MAP_READ);
            if (FAILED(hr)) {
            }
            else {
                av_frame_make_writable(frame);
                memcpy(frame->data[0], cpuImage.pBits, cpuImage.Pitch);
            }
            surface->Unmap();


  


  The map fails. Maybe the IDXGISurface is accesible only from GPU

  


  I've tried a lot of methods to make it CPU accesible.

  


  Another solution would be to encode frame with ffmpeg directly on GPU , so i don't need to copy it to cpu, but not sure how i could do that.

  


• how to get the output of a child process in a variable c#

  4 August 2022, by Dokoa

  I want to get width, height information into a variable after ffprobe is finished.

  


  int width, height;   
Process pr = new Process();
                pr.StartInfo.FileName = "ffprobe";
                pr.StartInfo.Arguments = $"- v error - select_streams v: 0 - show_entries stream = width,height - of default = nw = 1 input.mp4";
                pr.StartInfo.UseShellExecute = false;
                pr.StartInfo.CreateNoWindow = true;
                pr.EnableRaisingEvents = true;
                pr.Start();


  


  example of ffprobe console output

  


  width=320
height=180