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• Revision caccf06acd : Palette-based coding experiment Added palette coding option for Y channel only,

  21 janvier 2015, par hui su

  Changed Paths :
   Modify /configure

  
   Modify /vp9/common/vp9_blockd.h

  
   Modify /vp9/common/vp9_entropymode.c

  
   Modify /vp9/common/vp9_entropymode.h

  
   Modify /vp9/common/vp9_enums.h

  
   Modify /vp9/common/vp9_onyxc_int.h

  
   Add /vp9/common/vp9_palette.c

  
   Add /vp9/common/vp9_palette.h

  
   Modify /vp9/common/vp9_reconintra.c

  
   Modify /vp9/decoder/vp9_decodeframe.c

  
   Modify /vp9/decoder/vp9_decodemv.c

  
   Modify /vp9/decoder/vp9_decoder.c

  
   Modify /vp9/decoder/vp9_reader.h

  
   Modify /vp9/encoder/vp9_bitstream.c

  
   Modify /vp9/encoder/vp9_context_tree.c

  
   Modify /vp9/encoder/vp9_context_tree.h

  
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_encoder.c

  
   Modify /vp9/encoder/vp9_rdopt.c

  
   Modify /vp9/encoder/vp9_writer.h

  
   Modify /vp9/vp9_common.mk

  
  
  Palette-based coding experiment

  Added palette coding option for Y channel only, key frame only.
  Palette colors are obtained with k-means clustering algorithm.
  Run-length coding is used to compress the color indices.

  On screen_content :
  — enable-palette + 5.75%
  — enable-palette —enable-tx_skip +15.04% (was 13.3%)

  On derflr :
  — enable-palette - 0.03%
  with all the other expriments + 5.95% (was 5.98%)

  Change-Id : I6d1cf45c889be764d14083170fdf14a424bd31b5

• How to do the "TV Compression" thing in FFMPEG ?

  7 août 2019, par Imageny

  I’m trying to do this thing in FFmpeg where I make the picture a little better but I also compress the audio as heavily as on TV. I’ve tried everything, but nothing seems to be working out very well. I’m making this code for a VB program.

  This is the result I want to achieve. It’s the first part of the video : https://streamable.com/3rjnp

  That part was done using the audio effects in VEGAS Pro.

  And this is the code I keep working on :

  ffmpeg -i "inputfile.mp4" -s 1920x1080 -vf "minterpolate=59.94,tblend=all_mode=average,framestep=2, colorlevels=rimin=0.039:gimin=0.039:bimin=0.039:rimax=0.96:gimax=0.96:bimax=0.96, colorlevels=rimax=0.902:gimax=0.902:bimax=0.902, noise=alls=25:allf=t+u" -af "alimiter, dynaudnorm=p=1/sqrt(2):m=100:s=12:g=15, treble=f=1803:t=o:width=6:g=15, acompressor=threshold=0.3:ratio=20:attack=5:release=50, "volume=-12.7dB", dynaudnorm=m=100:r=1:s=15:g=3, aresample=48000, alimiter, acompressor=threshold=1:release=20, "volume=20dB", loudnorm, alimiter" -vcodec mpeg4 -acodec aac -ar 48000 -b:a 256k "outputfile.mp4"

  How do I properly do it ?

• FFMPEG not working for larger size file using PHP in my VPS server with CentOS

  28 juillet 2019, par MrinmoyMk

  I want to compress and convert different audio formats into mp3 file using ffmpeg in php. I have already installed ffmpeg and is working fine for files below 0.9 mb. Whenever I try to submit files larger than 0.9 mb then I get error .
  It may be there is some mistake in my VPS server configuration or mistake in my PHP codes. Could you please help me.

  I have also already tried setting the chmod or permission as 777 in my server to the needed files in my server

  This is my PHP code

  if (isset($_POST['submit'])) {
  
  
  
  $path = "song/"; //set your folder path
  
  $mp3_local=$_FILES['mp3_local']['name'];
  
  
  
  $tmp = $_FILES['mp3_local']['tmp_name'];
  
  
  
  
  
  exec("ffmpeg -i ".$tmp." -ab 96k ./out96/$mp3_local.mp3");}

  This is the error message that I receive when submitting files greater than 0.9 mb :

  Forbidden

  You don’t have permission to access /convert.php on this server.

  Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request.

  But now after disabling ModSecurity in my server configuration the above 403 error is gone but still the FFMPEG is not being able to handle larger size files

  How do I solve this ?