Recherche avancée

Sur d’autres sites (5475)

• How can I generate HDR10 video from 16bit png images in browser using ffmpeg.wasm

  31 mars 2022, par Rajat Raghuwanshi

  Using FFMPEG.WASM I am able to generate video using libx264 encoder but unable to display the video generated using libx265. The image that I am using is the 16bit png image with linear gamma icc profile - AllColorsRGB-elle-V2-g10.icc. Here are the parameters that I used while encoding the hdr10 video.
  
-i abc.png -c:v libx265
  -x265-params hdr-opt=1:repeat-headers=1:colorprim=bt2020:transfer=smpte2084:colormatrix=bt2020nc:master-display=G(8500,39850)B(6550,2300)R(35400,14600)WP(15635,16450)L(40000000,50):max-cll=0,0
  -pix_fmt yuv420p10le out.mov

  


• Bash script to recursive find and convert movies

  24 mars, par Jacco

  in my large movie collection I would like to search for movies with the primary (first) audio track with DTS coding to be converted to Dolby.

  


  My problem would be the first track I think. My current bash script will list any movie containing a DTS track, but does not specify which track.

  


  #!/bin/bash
# My message to create DTS list
find /home/Movies -name '*.mkv' | while read f
do
if mediainfo "$f" | grep A_DTS; then
echo $f 
fi
done


  


  After that I would like to run this command

  


  ffmpeg -i $f -map 0:v -map 0:a:0 -map 0:a -map 0:s -c:v copy -c:a copy -c:s copy -c:a:0 ac3 -b:a:0 640k $f


  


  or is there a way to move all the audio tracks down and adding the new AAC track ?

  


  ###Progress

  


  Thanks to @llogan I have finetuned the bash to find the required files.

  


  #!/bin/bash
# My DTS conversion script
# credits to llogan

find /Mymovies -name '*.mkv' | while read f
do
 if ffprobe -v error -select_streams a:0 -show_entries stream=codec_name -of csv=p=0 "$f" | grep dts; then
 echo "$f"
fi
done


  


  Now digging into the command I think I may have a working command. Anybody spot a problem ?

  


  ffmpeg -i $f
      -map 0:v -c:v copy
      -map 0:a:0? -c:a:0 ac3
      -map 0:a:0? -c:a:1 copy
      -map 0:a:1? -c:a:2 copy
      -map 0:a:2? -c:a:3 copy
      -map 0:a:3? -c:a:4 copy
      -map 0:a:4? -c:a:5 copy
      -map 0:a:5? -c:a:6 copy
      -map 0:a:6? -c:a:7 copy
      -map 0:a:7? -c:a:8 copy
      -map 0:a:8? -c:a:9 copy
      -map 0:s? -c copy
      -b:a:0 640k
/tmp/output.mkv
mv $f /home/DTS_BACKUP/
mv /tmp/output.mkv $f
rm /tmp/output.mkv


  


  So the end result would look like :

  


  #!/bin/bash
# My DTS conversion script
# credits to llogan
find /Mymovies -name '*.mkv' | while read f
do
 if ffprobe -v error -select_streams a:0 -show_entries stream=codec_name -of csv=p=0 "$f" | grep dts; then

ffmpeg -i $f
          -map 0:v -c:v copy
          -map 0:a:0? -c:a:0 ac3
          -map 0:a:0? -c:a:1 copy
          -map 0:a:1? -c:a:2 copy
          -map 0:a:2? -c:a:3 copy
          -map 0:a:3? -c:a:4 copy
          -map 0:a:4? -c:a:5 copy
          -map 0:a:5? -c:a:6 copy
          -map 0:a:6? -c:a:7 copy
          -map 0:a:7? -c:a:8 copy
          -map 0:a:8? -c:a:9 copy
          -map 0:s? -c copy
          -b:a:0 640k
/tmp/output.mkv
mv $f /home/DTS_BACKUP/
mv /tmp/output.mkv $f
rm /tmp/output.mkv

fi
done


  


• How to marge Youtube video with MP4 using FFMPEG library in Android ?

  27 février 2018, par Apurv Modi

  Here is my code

  private void executeAudioVideo() {
  
          File moviesDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES);
  
          String filePrefix = "audio_video";
  
          String fileExtn = ".mp4";
  
  
  
          youtubeURL = "https://www.youtube.com/embed/oEKyXKL25FU";
  
          videoPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/video.mp4";
  
  
  
          File dest = new File(moviesDir, filePrefix + fileExtn);
  
          int fileNo = 0;
  
          while (dest.exists()) {
  
              fileNo++;
  
              dest = new File(moviesDir, filePrefix + fileNo + fileExtn);
  
          }
  
          filePath = dest.getAbsolutePath();
  
  
  
          String[] command = new String[]{"-y", "-i", videoPath, "-i", youtubeURL, "-filter_complex", "[0:a][1:a]amerge=inputs=2[a]", "-map", "0:v", "-map", "[a]", "-c:v", "copy", "-c:a", "libvorbis", "-ac", "2", "-shortest", filePath};
  
  
  
          Toast.makeText(this, filePath, Toast.LENGTH_SHORT).show();
  
          execFFmpegBinary(command);
  
      }