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• How to reduce conversion/compression time in FFmpeg and How to merge command ?

  18 mai 2017, par Patel Pinkal

  I want to reduce time taken to create new video after adding text in original video using FFmpeg
  I had tried to search and I found this code given below for reducing time.

   -y -i /sdcard/videokit/in.mp4 -strict experimental -vcodec libx264 -preset ultrafast -crf 24 -acodec aac -ar 44100 -ac 2 -b 36000k -s 1280x720 -aspect 16:9 -metadata:s:v:0 rotate=0 /sdcard/videokit/out3.mp4

  Now, I want to add text in video and it is done in FFmpeg, by this command and its 100% working.

    String[] addTextCommand = {
  
              "-i",
  
              "" + realFilePath,
  
              "-vf",
  
              "drawtext=fontsize=50:fontfile=/storage/emulated/0/Download/Cerbetica-regular.ttf:fontcolor=red:text='"
  
                      + strText +
  
                      "':x=0:y=0: box=1: boxcolor=black@0.5:boxborderw=10: x=0: y=(h-text_h)/2",
  
              "-strict",
  
              "-2",
  
              outputFilePath};

  Now my problem is how do I merge this two code and make one single command to make an edited video and also take less time to create a new video. In this, I have tried this command but it’s not working.

     String[] addTextCommand = {
  
              "-i",
  
              "" + realVideoPath,
  
              "-vf",
  
              "-c:v", "libx264",
  
              "-preset", "ultrafast",
  
              "-crf", "24",
  
              "-acodec", "aac",
  
              "-ar", "44100",
  
              "-ac", "2",
  
              "-b", "36000k",
  
              "-s", "1280x720",
  
              "-aspect", "16:9",
  
              "-metadata:s:v:0 rotate=0",
  
              "drawtext=fontsize=50:fontfile=/storage/emulated/0/Download/Cerbetica-regular.ttf:fontcolor=red:text='"
  
                      + strText +
  
                      "':x=0:y=0: box=1: boxcolor=black@0.5:boxborderw=10: x=0: y=(h-text_h)/2",
  
              "-strict",
  
              "-2",
  
              outputFilePath};

  If anyone has an idea how to make command of FFmpeg please describe it and explain how to use it.

  Using command of @Mulvya I got this in the console.

       D/MainActivity: FAILED with output : WARNING: linker: /data/user/0/com.inheritx.videoprocessing/files/ffmpeg has text relocations. This is wasting memory and prevents security hardening. Please fix.
  
                     ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
  
                       built with gcc 4.8 (GCC)
  
                       configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/i686-linux-android- --arch=x86 --cpu=i686 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/x86 --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -march=i686' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
                       libavutil      55. 17.103 / 55. 17.103
  
                       libavcodec     57. 24.102 / 57. 24.102
  
                       libavformat    57. 25.100 / 57. 25.100
  
                       libavdevice    57.  0.101 / 57.  0.101
  
                       libavfilter     6. 31.100 /  6. 31.100
  
                       libswscale      4.  0.100 /  4.  0.100
  
                       libswresample   2.  0.101 /  2.  0.101
  
                       libpostproc    54.  0.100 / 54.  0.100
  
                     Unrecognized option '2'.
  
                     Error splitting the argument list: Option not found
  
     D/MainActivity: Finished command : ffmpeg -i
  
     D/MainActivity: Finished command : ffmpeg /storage/emulated/0/Download/spacetestSMALL_512kb.mp4
  
     D/MainActivity: Finished command : ffmpeg -vf
  
     D/MainActivity: Finished command : ffmpeg drawtext=fontsize=50:fontfile=/system/fonts/DroidSans.ttf:fontcolor=red:text='Hello':x=0:y=0: box=1: boxcolor=black@0.5:boxborderw=10: x=0: y=(h-text_h)/2
  
     D/MainActivity: Finished command : ffmpeg -c:v
  
     D/MainActivity: Finished command : ffmpeg libx264
  
     D/MainActivity: Finished command : ffmpeg -preset
  
     D/MainActivity: Finished command : ffmpeg ultrafast
  
     D/MainActivity: Finished command : ffmpeg -crf
  
     D/MainActivity: Finished command : ffmpeg 24
  
     D/MainActivity: Finished command : ffmpeg -acodec
  
     D/MainActivity: Finished command : ffmpeg aac
  
     D/MainActivity: Finished command : ffmpeg -ar
  
     D/MainActivity: Finished command : ffmpeg 44100
  
     D/MainActivity: Finished command : ffmpeg -s
  
     D/MainActivity: Finished command : ffmpeg 1280x720
  
     D/MainActivity: Finished command : ffmpeg -aspect
  
     D/MainActivity: Finished command : ffmpeg 16:9
  
     D/MainActivity: Finished command : ffmpeg -metadata:s:v:0 rotate=0
  
     D/MainActivity: Finished command : ffmpeg -strict
  
     D/MainActivity: Finished command : ffmpeg -2
  
     D/MainActivity: Finished command : ffmpeg /storage/emulated/0/Movies/add_text25.mp4

• Generate animated padded thumbnail using ffmpeg

  15 juillet 2022, par kregus

  we've been generating animated thumbnails with ffmpeg without a problem using this command :

  


  ffmpeg -y -ss 5 -t 3 -i "/input.mp4" -i /playbtn.png -r 10 -filter_complex "[0]fps=10,scale=1280:-1:flags=lanczos[pb];[pb][1]overlay=(W-w)/2:(H-h)/2, split[s0][s1];[s0]palettegen=max_colors=32[p];[s1][p]paletteuse=dither=bayer" /output.gif


  


  However, now we want to force each thumbnail to be 1280x720 and pad the rest black.

  


  This works well for regular thumbnails with this command :

  


  ffmpeg -y -ss 5 -t 3 -i "/input.mp4" -vframes 1 -filter:v "scale=w=1280:h=720:force_original_aspect_ratio=1,pad=1280:720:(ow-iw)/2:(oh-ih)/2" /output.jpg


  


  Now I tried dozens of ways to try and integrate the force_original_aspect_ratio and pad filters into the animated thumbnail generation code, but am getting a host of errors, like :

  


  Cannot find a matching stream for unlabeled input pad 0 on filter Parsed_split_4

  


  When I tried this command :

  


  ffmpeg -y -ss 5 -t 3 -i "/Users/nick/Downloads/intro_portrait_nl_1650909779_rendereddd.mp4" -i /Applications/Ampps/www/vormats_aws/web-render/functions/files/playbtn.png -r 10 -filter_complex "[0]fps=10,scale=1280:720:flags=lanczos:force_original_aspect_ratio=1,pad=1280:720:(ow-iw)/2:(oh-ih)/2[pb];[pb][1]overlay=(W-w)/2:(H-h)/2;split[s0][s1];[s0]palettegen=max_colors=32[p];[s1][p]paletteuse=dither=bayer" /Users/nick/Downloads/smallLandscapeee.gif


  


  ... You get the point, I have no idea how to adapt our original animated thumbnail generation code to force a 1280x720 resolution with padding.

  


  Any input is appreciated, thanks !

  


• FFMPEG.wasm Cannot Add Album Cover To MP3 File

  5 juillet 2022, par Shaan Khan

  for a project I'm working on I'm trying to split a video into multiple audio clips whilst adding metadata for each individual track. Whilst doing this, whilst I've added most of the metadata including title & artist, I'm unable to add an album cover via FFMPEG.wasm. Whilst my command works fine with regular FFMPEG.wasm, I'm unable to get it to work via the webassembly version.

  


  I'm aware that my album cover is correctly being assigned via FS.readfile and that my command in theory should work, but I'm unable to figure out why it isn't working. Is this a FFMPEG.wasm limitation and if so, is there any workaround for this ?

  


  

  • Normal FFMPEG Command

  


  


  ffmpeg -i "song.mp3" -i albumCover.jpg -map 0:0 -map 1:0 -y -codec:a libmp3lame -ac 2 -ar 48000 -ab 320k -ss 00:00:00 -t 00:00:20 -id3v2_version 3  -metadata title="SongOne" -metadata album_artist="Artist Name" -metadata album="Youtube Name" -metadata track="1" "output.mp3"


  


  

  • FFMPEG WASM Implementation

  


  


    let commandArray = [
      "-i",
      "song.mp3",
      "-i",
      "albumCover.jpg",
      "-map",
      "0:0",
      "-map",
      "1:0",
      "-y",
      "-codec:a",
      "libmp3lame",
      "-ac",
      "2",
      "-ar",
      "48000",
      "-ab",
      "320k",
      "-ss",
      startTime.toString(),
    ];

    if (duration != "-1") {
      commandArray.push("-t", duration.toString());
    }

    commandArray.push(
      "-id3v2_version",
      "3",
      "-metadata",
      `title="${title}"`,
      "-metadata",
      `album_artist="${artist}`,
      "-metadata",
      `album="${albumInfo.name}"`,
      "-metadata",
      `track="1"`,
      `${timestamp.songName} - ${timestamp.artistName}.mp3`
    );