Recherche avancée

Sur d’autres sites (13602)

• Revision e68c8dcfd2 : Substantial restructuring of AQ mode 2. The restructure moves the decision into

  27 novembre 2014, par Paul Wilkins

  Changed Paths :
   Modify /vp9/encoder/vp9_aq_complexity.c

  
   Modify /vp9/encoder/vp9_aq_complexity.h

  
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_encoder.c

  
   Modify /vp9/encoder/vp9_encoder.h

  
  
  Substantial restructuring of AQ mode 2.

  The restructure moves the decision into the rd pick
  modes loop and makes a decision based at the 16x16
  block level instead of only the 64x64 level.

  This gives finer granularity and better visual results
  on the clips I have tested. Metrics results are worse
  than the old AQ2 especially for PSNR and this mode
  now falls between AQ0 and AQ1 in terms of visual
  impact and metrics results.

  Further tuning of this to follow.

  It should be noted that if there are multiple iterations
  of the recode loop the segment for a MB could change
  in each loop if the previous loop causes a change in the
  complexity / variance bin of the block. Also where a block
  gets a delta Q this will alter the rd multiplier for this block
  in subsequent recode iterations and frames where the
  segmentation is applied.

  Change-Id : I20256c125daa14734c16f7cc9aefab656ab808f7

• Vertical video subtitles burn font size

  20 mai 2020, par fantom

  I have two videos, one of them is has display aspect ratio (DAR) 16:9 (horizontal) and another one has 9:16 (vertical). I need to burn in subtitles into them, and for horizontal video I need to set Fontsize=18. But if I try to use the same settings with vertical video, I get very big text size, so I need to set Fontsize=10 to get the same size of letters as in horizontal video.
The question is, why I get different displayed font sizes for different DAR and is there any way to have one settings for both (I don't know up front which orientation video will have when burning subtitles and want to not depend on it)

  


• Loop recursively for specific extension and subfolders

  10 février 2017, par kuruvi

  I have been trying to convert flac to m4a, I have the below script that does the job but it is not recursive :

  for f in *.flac; do
  
      ffmpeg -i "$f"  -vf "crop=((in_w/2)*2):((in_h/2)*2)" -c:a alac "${f%.flac}.m4a"
  
  done

  For recursive, I did try several ways but none worked, here is what I tried
  (space on file name is the problem here)

  for f in `find . $PWD -iname *.flac`; do
  
      ffmpeg -i "$f"  -vf "crop=((in_w/2)*2):((in_h/2)*2)" -c:a alac "${f%.flac}.m4a"
  
  done

  and this

  find . -type f -iname "*.flac" -print0 |
  
      while IFS= read -r -d $'\0' line; do
  
          echo "$line"
  
          ffmpeg -i "$line"  -vf "crop=((in_w/2)*2):((in_h/2)*2)" -c:a alac "${f%.flac}.m4a"; done   
  
      done

  None of them work.