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• Batch resizing videos to specific resolution with ffmpeg

  9 juin 2020, par tjk

  I need to resize all mp4 videos in a folder to a specific resolution. It is a vertical video that must be exactly 360x640px. Input videos can be of different resolutions, aspect ratios, vertical or horizontal. I am very new to this and so far I only got to this :

  



  for i in *.mp4; do ffmpeg -i "$i" -vf "scale='if(gt(a*sar,16/9),360,640*iw*sar/ih)':'if(gt(a*sar,16/9),360*ih/iw/sar,640)',pad=360:640:(ow-iw)/2:(oh-ih)/2,setsar=1" "converted/${i%.*}.mp4"; done


  



  When running this with 16 videos one of them (400x672px) won't resize with this error in log :

  



  [Parsed_pad_1 @ 0x7fd760548c00] Input area -10:0:370:640 not within the padded area 0:0:360:640 or zero-sized
[Parsed_pad_1 @ 0x7fd760548c00] Failed to configure input pad on Parsed_pad_1
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #0:0
[aac @ 0x7fd76280da00] Qavg: 15546.137
[aac @ 0x7fd76280da00] 2 frames left in the queue on closing


  



  Please help to fix this.

  


• FFMPEG - Concat Videos + Add Audio

  24 mars 2020, par John Doe

  I’m trying to pipe some videos into an ffmpeg command which will concat the videos (keeping their audio) and mix a background audio track over the whole thing. I need the video to end when the audio does.

  However right now this doesn’t work right. The music cuts out after the first video, and ffmpeg doesnt stop encoding when music stops. It seems simple enough but I’ve been working at this all night, any help would be appreciated.

  ffmpeg -y -hide_banner -protocol_whitelist file,pipe -f concat -safe 0 -i pipe: -i "music.mp3" -filter_complex "[1:a]afade=in:0:d=10,volume=0.5[music];[0:a][music]amix=duration=longest[a]" -map "0:v" -map "[a]" -c:v libx264 -x264-params keyint=120:scenecut=0 -c:a aac -ac 1 -ar 22050 -movflags faststart -r 30 -fflags genpts "%random%.mp4"

• FFMPEG linux how to get the total time duration of a folder containing videos ?

  3 octobre 2015, par Andrea Turco

  i need to get the total count of video times in a folder

  I need to generate a file .txt that export just the total time of the videos in the folder in the format :

  HH:MM:SS

  Actually with this script i get just the duration of single files splitted..i need just single output in the file video_times.txt with the total duration.

  videos=( "/home/videos")
  
  default_ext=( mp4 avi )
  
  dump_file=./video_times.txt
  
  
  
  # parameters or default values?
  
  (( $#==0 )) && ext=( "${default_ext[@]}" ) || ext=( "$@" )
  
  echo "locations: ${videos[@]/$HOME/~}"
  
  echo "extensions: ${ext[@]}"
  
  
  
  for(( i=0; i<${#ext[@]}; i++ ))
  
  do 
  
    (( i>0 )) && find_params+=( -o )
  
    find_params+=( -iname '*.'${ext[$i]} )
  
  done
  
  find_params=( '(' "${find_params[@]}" ')' )
  
  
  
  rm "$dump_file" 2>/dev/null
  
  
  
  while IFS= read -rd '' f
  
  do
  
    echo "$(( ++n )): $f"
  
    # time in original HH:MM:SS.ms format and in SSSSSS.ms
  
    ffmpeg -i "$f" 2>&1 | awk '/Duration:/ {split($2, t, ":|,"); print $2 t[1]*3600+t[2]*60+t[3]; }' >> "$dump_file"
  
  done < <( find "${videos[@]}" "${find_params[@]}" -print0 )
  
  
  
  awk -F, '    {
  
                 total=$2;
  
           #  printing numbers during work
  
           #      printf("%+10.2f\t(%10.2f)\n", $2, total );
  
               }
  
           END {
  
           #      print "-----------------------------";
  
                 printf( "%.2f seconds in %d files\n", total, NR );
  
                 h=total/3600; total%=3600;
  
                 m=total/60; total%=60;
  
                 printf( "%02d:%02d:%s\n", h, m, total )
  
               }' "$dump_file"