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• Don't work some keys of coding in FFmpeg

  17 décembre 2015, par Plush

  <?
  
      // $videoPath — path to the video file
  
      // $newVideoPath — path of the resultant video file
  
  
  
      exec('/usr/bin/ffmpeg -i ' . $videoPath . ' -vcodec libx264 -profile high -level 3.1 -s 1280x720 -sar 1:1 -aspect 16:9 -b:v 3800K -dct8x8 1 -partitions +parti4x4+parti8x8+partp4x4+partp8x8+partb8x8 -refs 5 -fast-pskip 0 -subq 9 -me_method full -me_range 32 -mbd rd -flags +mv4+qpel -g 40 -keyint_min 4 -bf 2 -direct-pred 1 -b_strategy 2 -b-pyramid 1 -weightb 1 -weightp 2 -coder 1 -qmin 0 -qdiff 1 -acodec libfaac -ac 2 -ar 48000 -ab 192K ' . $newVideoPath);

  I defined keys which don’t work :
  - dct8x8 1 - partitions +parti4x4+parti8x8+partp4x4+partp8x8+partb8x8 (coding of video doesn’t work)
  - me_method full (the video file is coded, but it isn’t started in a player)
  FFmpeg version : 1.2.6

  How to involve an adaptive method of transformations 8x8 in an I-shot and to set a method of an assessment of the movement of full pixel as full ?

• How to replace the text in the filename and move the file to different directory

  2 octobre 2019, par Hugo Shih

  I’m a newbie to this bash scripting and I’m writing a script with ffmpeg to help my production more efficient. I think I put two questions at once and hope it won’t be confused :

  Here is my script :

  #!/bin/bash
  
  
  
  for file in *.mov
  
  do
  
    ffmpeg  -probesize 50M -analyzeduration 100M -ss 00:00:10.00 -i "$file" -map 0:0 -map 0:1 - 
  
    c:a aac_at -ab 256k -ar 48000 -ac 2 -strict -2 -async 1 -c:v libx264 -crf 20 -r 24000/1001 
  
    -s 1920x1080 -aspect 16:9 -pix_fmt yuv420p -preset fast -partitions 
  
    partb8x8+partp4x4+partp8x8+parti8x8 -b-pyramid 1 -weightb 1 -8x8dct 1 -fast-pskip 1 - 
  
    direct-pred 1 -coder ac -trellis 1 -motion-est hex -subq 6 -me_range 16 -bf 3 -b_strategy 1 
  
    -sc_threshold 40 -keyint_min 24 -g 48 -qmin 3 -qmax 51 -qdiff 4 -metadata creation_time=now 
  
    -sn -t 00:01:00.02 -y "${file%.*}_H264_1080".mov
  
  done

  Basically what I’m tyring to do is taking a "Movie_ProRes_1080.mov" file and make it as a H264 and rename it as "Movie_H264_1080.mov". The way I work around is Export the file as "Movie" and let it added behind which is really not what I want because I need to export another file to fit this purpose. The main goal is I can use the "Movie_ProRes_1080.mov" convert it to "Movie_H264_1080".

  Also, from the script, it rendered out to the same location. Would it be possible to render to a different directory ? Like source at /Users/editor/source, but render out at /Users/editor/output.

• Revision 53ff43adc3 : Prunes out full-rd computation based on modeled rd Adds a speed feature to elim

  9 juillet 2013, par Deb Mukherjee

  Changed Paths :
   Modify /vp9/common/vp9_blockd.h

  
   Modify /vp9/encoder/vp9_onyx_if.c

  
   Modify /vp9/encoder/vp9_onyx_int.h

  
   Modify /vp9/encoder/vp9_rdopt.c

  
  
  Prunes out full-rd computation based on modeled rd

  Adds a speed feature to eliminate full-rd computation if the modeled
  rd or rd based on a different parameter in the same mode is already
  a lot larger than the best rd yet.

  Specifically, only search the sharp and smooth filters if the modeled
  rd cost based on the regular filter is within a certain factor of the
  best rd cost so far. Also, skip full-rd computation of non splitmv
  inter modes if the modeled rd cost based on pred error is within the
  same factor of the best rd cost so far.

  Also adds some enhancements in the rd search for splitmv mode to
  speed things up by early breakouts. Negligible impact on performance.

  Resuts on derfraw300 :
  psnr : -0.013% with the splitmv enhancements, -0.24% with the rd
  breakout feature on.
  speedup : 6% with splitmv enhancements, 20% with also residual breakout
  (tested on football sequence at 600 Kbps)

  Change-Id : I37abc308ea9f110c1679ce649b6a7e73ab1ad5fc