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• Need help in bash script for ffmpeg encoding [duplicate]

  26 octobre 2022, par naoki

  Tried running the code for encoding the batch videos from a list but from the list it seems to run only the first leave behind the rest.

  


  The list mentioned in rip.txt

  


  Data_science - [1x01] - Introduction.mkv
Data_science - [1x02] - What's Data Science.mkv
Data_science - [1x03] - Packages needed.mkv


  


  The Code :

  


  ***#!/bin/bash

cd /mnt/d1/xsrc/

fn='/mnt/d1/xsrc/rip.txt'
n=1
while read line;
do
ffmpeg -v error -stats -i "$line" -map 0:2 -map_metadata -1 -map_chapters -1 -vn -an -dn -scodec copy -y /mnt/d1/src2/tmp/sub.ass ; ffmpeg -v error -stats -i "$line" -map 0:1 -map_metadata -1 -map_chapters -1 -b:a 96k -ar 48000 -vn -sn -dn -y /mnt/d1/src2/tmp/audio_jpn.m4a ; ffmpeg -v error -stats -i "$line" -strict -1 -map 0:0 -f yuv4mpegpipe -pix_fmt yuv444p12le -s 1280x720 -r 30 - | x265 - --y4m -p slow --bitrate 723 -t animation --output-depth 10 --pass 1 --bframes=8 --psy-rd=1.5 --psy-rdoq=2 --aq-mode=3 --aq-strength=0.8 --deblock=-1,-1 -o /mnt/d1/src2/tmp/video_und.h265 ; ffmpeg -v error -stats -i "$line" -strict -1 -map 0:0 -f yuv4mpegpipe -pix_fmt yuv444p12le -s 1280x720 -r 30 - | x265 - --y4m -p slow --bitrate 723 -t animation --output-depth 10 --pass 2 --bframes=8 --psy-rd=1.5 --psy-rdoq=2 --aq-mode=3 --aq-strength=0.8 --deblock=-1,-1 -o /mnt/d1/src2/tmp/video_und.h265 ; mp4box -add "/mnt/d1/src2/tmp/video_und.h265#video:lang=und" -new "/mnt/d1/src2/tmp/video0000_und.mp4" ; mkvmerge -o /mnt/d1/output/tmp/"$line" --disable-track-statistics-tags --language 0:jpn /mnt/d1/src2/tmp/audio_jpn.m4a --sub-charset 0:UTF-8 --language 0:eng /mnt/d1/src2/tmp/sub.ass /mnt/d1/src2/tmp/video0000_und.mp4 ; rm -rf /mnt/d1/src2/tmp/* ; n=$((n+1))
done < $fn***


  


  Need help in resolving this.

  


• How to use fig.show=animate in knitr without administrator privileges

  23 mai 2013, par Stéphane Laurent

  I use Windows without administrator privileges hence I cannot set a path in the Windows PATH variable.

  The ffmpeg.exe file is in my "U:/ProgramFiles/ImageMagick-6.8.5-5/" folder.

  I have found how to use the saveVideo() function of the animate package :

  ani.options(ffmpeg = shQuote('U:/ProgramFiles/ImageMagick-6.8.5-5/ffmpeg.exe'))
  
  saveVideo({
  
    par(mar = rep(3, 4))
  
    for (i in seq(pi/2, -4/3 * pi, length = 12)) {
  
      plot(0, 0, pch = 20, ann = FALSE, axes = FALSE)
  
      arrows(0, 0, cos(i), sin(i))
  
      axis(1, 0, "VI"); axis(2, 0, "IX")
  
      axis(3, 0, "XII"); axis(4, 0, "III"); box()
  
    }
  
  },
  
          video.name="mavideo.mp4",
  
          outdir="U:/Data/Rtests/Animation")

  But I haven't find how to knit a Rmd file with the option fig.show=animate in a chunk, for instance :

  ```{r clock, fig.width=7, fig.height=6, fig.show='animate'}
  
  par(mar = rep(3, 4))
  
  for (i in seq(pi/2, -4/3 * pi, length = 12)) {
  
      plot(0, 0, pch = 20, ann = FALSE, axes = FALSE)
  
      arrows(0, 0, cos(i), sin(i))
  
      axis(1, 0, "VI"); axis(2, 0, "IX")
  
      axis(3, 0, "XII"); axis(4, 0, "III"); box()
  
  }
  
  ```

  I have tried to modifiy the hook_ffmpeg_html() function by only changing the ffmpeg.cmd variable :

  ```{r}
  
   hook_ffmpeg_html2 <- function (x, options) 
  
  { 
  
      ........ 
  
      ffmpeg.cmd = paste("-y", "-r", 1/options$interval, 
  
          "-i", fig.fname, mov.fname) 
  
      ffmpeg.cmd <-  paste('"U:/ProgramFiles/ImageMagick-6.8.5-5/ffmpeg"', ffmpeg.cmd) 
  
     ...... 
  
  } 
  
  opts_knit$set(animation.fun = hook_ffmpeg_html2) 
  
  ```

  But this chunk does not work, below is the error message :

  label: unnamed-chunk-1 
  
  Warning in block_exec(params) : 
  
    failed to tidy R code in chunk  
  
  reason: Error in base::parse(text = text, srcfile = NULL) : 
  
    21:14: unexpected symbol 
  
  20: options$out.height), if ("controls" %in% mov.opts) 
  
  21: "controls=\\"controls 

• FFmpeg Idet with Timecode/Frame Number ?

  13 avril 2021, par Matt Cohen

  Is it possible to get ffmpeg to tell you which frames it thinks are interlaced/progressive when running the idet filter ?

  


  My use case is that when interlaced frames are detected in a file I need to be able to know which frames ffmpeg thinks are interlaced so I can easily pull them up and check if ffmpeg was correct in its assessment. Sometimes aliasing and thin lines in animation throw it off.