Recherche avancée

Sur d’autres sites (5403)

• How do I create and initialise a DXGI_FORMAT_NV12 resource in DX12 (source is AVFrame)

  5 janvier 2023, par mike

  I'm trying to create an NV12 resource as source for a video encoder in DX12. While I intend to eventually populate a resource from GPU, what I'm trying to do now is take an ffmpeg AVFrame I already have (in AV_PIX_FMT_YUV420P format) and create a texture in DXGI_FORMAT_NV12 format using that data.
  

  


  I understand the NV12 format (https://learn.microsoft.com/en-us/windows/win32/medfound/recommended-8-bit-yuv-formats-for-video-rendering#nv12) has U and V interleaved while the AV_PIX_FMT_YUV420P doesn't.

  


  My main question is what does the D3D12_RESOURCE_DESC look like for an NV12 texture - do I tell it I need more than one array/mip level to make it planar ? Or do I just give it a single memory address with both planes layed out as per the NV12 format, and it figures out subresources for me based on the format ?
  
I understand that to read the data I define two SRVs, one for Y mapped to the Red channel and a second for U and V, but it's how I initialise it that's confusing me.

  


• Use modern avconv syntax for codec selection in documentation and tests

  18 octobre 2012, par Diego Biurrun

  Use modern avconv syntax for codec selection in documentation and tests
  

  • [DBH] doc/encoders.texi
  • [DBH] doc/faq.texi
  • [DBH] doc/filters.texi
  • [DBH] tests/fate-run.sh
  • [DBH] tests/fate/demux.mak
  • [DBH] tests/fate/h264.mak
  • [DBH] tests/fate/microsoft.mak
  • [DBH] tests/fate/mp3.mak
  • [DBH] tests/fate/mpc.mak
  • [DBH] tests/fate/utvideo.mak
  • [DBH] tests/fate/video.mak
  • [DBH] tests/fate/vqf.mak
  • [DBH] tests/lavf-regression.sh

• COMPILATION ISSUES : FFMPEG CODE ON VS2012

  7 novembre 2013, par user2964667

  I have downloaded FFMPEG source code(c code) by the following link

  http://ffmpeg.zeranoe.com/builds/

  After that,I have completed the configuration part then i was generated and linked the library files *[avcodec-54.lib,avdevice-54.lib,avfilter-3.lib,avformat-54.lib,avutil-52.lib,swresample-0.lib,swscale-2.lib ]*on Microsoft Visual Studio C++ by creating a new project by including all .c and header files.

  Referred Links :
  http://www.ffmpeg.org/platform.html#Microsoft-Visual-C_002b_002b-or-Intel-C_002b_002b-Compiler-for-Windows

  When I was compiling on Visual studio 2010... I am getting more than 300 errors under all the files libavcodec,libavdevice,libavfilter,libavformat,libavresample,libavutil,libpostproc,libswresample,libswscale like

  ASM ERRORS :

  error C2400: inline assembler syntax error in 'opcode'; found 'data type'
  
  error C2065: '__asm__' : undeclared identifier
  
  error C2143: syntax error : missing ';' before 'volatile'

  SYNTAX ERRORS :

  error C2143: syntax error : missing '}' before '.'
  
  error C2143: syntax error : missing ';' before '.'
  
  error C2059: syntax error : '.'
  
  error C2143: syntax error : missing ';' before '}'
  
  error C2059: syntax error : '}'
  
  error C2143: syntax error : missing ';' before '{'
  
  error C2447: '{' : missing function header (old-style formal list?)
  
  error C2059: syntax error : ','
  
  error C2143: syntax error : missing ';' before '{'
  
  error C2447: '{' : missing function header (old-style formal list?)

  Please anyone let me know how to compile a ffmpeg c code on vs2010 successfully.