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• tests/fate/pixfmt : fix definition of 16bit tests

  18 mai, par James Almer

  tests/fate/pixfmt : fix definition of 16bit tests
  No effect as is, but without this change, new additions to FATE_PIXFMT_16-*
  
  will not work.
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] tests/fate/pixfmt.mak

• Why does ffmpeg not fully document all VAAPI filter graph operations and are there more than what I've listed here

  13 juin 2020, par John Allard

  I've compiled ffmpeg from snapshot with vaapi enabled.

  



  $ ffmpeg -hwaccels
Hardware acceleration methods:
vaapi


  



  I was curious about the available filter graph operations that I could do using my GPU, and found this page of documentation

  



  https://ffmpeg.org/ffmpeg-filters.html#toc-VAAPI-Video-Filters

  



  This page shows a single filter, tonemap_vaapi. I thought it was odd that there would only be a single filter and that it would be tonemap instead of something like scaling..

  



  So I ran this command

  



  $ ffmpeg -filters | grep vaapi
 ... deinterlace_vaapi V->V       (null)
 ... denoise_vaapi     V->V       (null)
 ... procamp_vaapi     V->V       (null)
 ... scale_vaapi       V->V       (null)
 ... sharpness_vaapi   V->V       (null)


  



  And it shows more filters that I don't find documented anywhere. Is there a reason why these aren't documented and where would I find out how use them ? Furhter, I notice that tonemap_vaapi is not one of those available filters..

  



  While we're on the subject, I was really hoping for some way to transpose a video using hardware acceleration. I do not see a transpose_vaapi filter but I did notice this thread https://patchwork.ffmpeg.org/project/ffmpeg/patch/20181225061644.6384-1-zachary.zhou@intel.com/, was this feature ever added to ffmpeg or why was it not ? Is there any way to perform transposition with OpenCL ? I don't see anything mentioning transposing under the OpenCL filters here https://ffmpeg.org/ffmpeg-filters.html#OpenCL-Video-Filters

  



  Thanks

  



  EDIT -

  



  I found the file ffmpeg/libavfilter/allfilters.c that lists many filters that are not documented.

  



  https://github.com/FFmpeg/FFmpeg/blob/master/libavfilter/allfilters.c

  



  This does how a transpose_vaapi

  


• avformat/rtsp : move SDP_MAX_SIZE macro definition to header file

  11 novembre 2020, par Limin Wang

  avformat/rtsp : move SDP_MAX_SIZE macro definition to header file
  move comments for the size of SDP_MAX_SIZE here :
  
  Some SDP lines, particularly for Realmedia or ASF RTSP streams,
  
  contain long SDP lines containing complete ASF Headers (several
  
  kB) or arrays of MDPR (RM stream descriptor) headers plus
  
  "rulebooks" describing their properties. Therefore, the SDP line
  
  buffer is large.
  
  The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
  
  in rtpdec_xiph.c.
  Signed-off-by : Limin Wang <lance.lmwang@gmail.com>
  

  • [DH] libavformat/rtsp.c
  • [DH] libavformat/rtsp.h
  • [DH] libavformat/rtspenc.c