Recherche avancée

Sur d’autres sites (12802)

• download part youtube video with ffmpeg ?

  1er août 2020, par testoflow

  I can't get this right
  
ffmpeg works well so can you help me ?

  


  #I can't get this right

  


  #!/bin/bash
var=$(xclip -o)

if [ -z $var ]; then  
    echo 'copia url a descargar al portapapeles'  
fi  

printf "(1) download part of video without audio\n"
printf "(2) download part of audio\n"
echo
echo -n 'opcion: '
read opcion
case $opcion in
    "1") c=$(youtube-dl -g $var | awk '{ if(NR==1) print $0 }' | sed 's/^/"/;s/$/"/')  && echo -n 'start time: ' && read segundos && echo -n 'duration: ' && read duration &&  ffmpeg -i $c -ss $segundos -t $duration probe.mp4;;  
    "2") b=$(youtube-dl -g $var | awk '{ if(NR==2) print $0 }' | sed 's/^/"/;s/$/"/')  && echo $b && ffmpeg -ss 0 -i $b  -t 10 probe.mp3;;  
esac  


  


• fate : add xvid test for custom matrices

  29 janvier 2014, par Janne Grunau

  fate : add xvid test for custom matrices
  Test sample is made from the sample in Bug-Id : videolan/7411
  

  • [DH] tests/Makefile
  • [DH] tests/fate/xvid.mak
  • [DH] tests/ref/fate/xvid-custom-matrix

• Add custom metadata tag to video file without altering anything else

  9 juin 2020, par salgarji

  I'm modifying DASH-formatted segments, and my aim is to add extra information to the video segment using metadata tags.

  



  I'm using ffmpeg to record video from my webcam and store segments named like : init-video0-0.mp4 for the initial and video-0-0-N.mp4 for the following, where N is the segment number (beginning at N=1).

  



  For ffmpeg to 'understand' video files, they must have a playable video file format, for that purpose I concat initial segment with Nth segment :

  



  cat init-video-0-mp4 video0-0-N.mp4 > video0-0-N_mod.mp4


  



  Once I have a proper/correct file, I can use ffmpeg to add tags.
I've tried the following command :

  



  ffmpeg -y -i /path/to/file.mp4 -movflags use_metadata_tags -metadata customtag='whatEverYouWantToAdd' /path/to/new/file.mp4


  



  My problem is that the ffmpeg modifies the file changing other information regarding start, duration, progressive and fragmented flags...

  



  I've used this tool : https://download.tsi.telecom-paristech.fr/gpac/mp4box.js/filereader.html, to analyze my files in a more intuitive way :

  



  

  



  Do you have any clue on how to add tags without altering DASH segments in any other way ? Even if it requires using another tool different from ffmpeg.

  



  Thank you in advance !