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• Burn subtitles with emojis on a video in android java

  19 mars 2024, par Maor Cohen

  video.mp4, subtitles.ass

  


  the ass file contains emojis. how to burn it on a video ? I tried ffmpeg.

  


  ffmpeg -i video.mp4 -vf "ass=subtitles.ass" -c:a copy -c:v h264 -crf 23 -preset veryfast output.mp4

  


  but the emojis are not showing. instead, rectangles are showing. it happens in every font I choose.

  


  subtitles.ass :
Format : Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding

  


  Style : Default,opensans_bold,59,&Hffb3b4,&HF0000000,&H000000,&HF0000000,-1,0,0,0,100,100,0,0,1,5,0,2,64,64,604,1

  


  [Events]

  


  Format : Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text

  


  Dialogue : 0,0:00:00.00,0:00:00.68,Default,,0,0,0,,yes 😍😄💙

  


• FFMPEG command works on terminal but not with Java/Kotlin

  11 septembre 2019, par Antony

  I’m trying to use an FFMPEG command for concatenating different videos. The command is

  ffmpeg -i video.mp4 -i video-2.mp4 -filter_complex "[0:v:0] [0:a:0] [1:v:0] [1:a:0] concat=n=2:v=1:a=1 [v] [a]" -map "[v]" -map "[a]" output.mp4

  This command works good when I run on Windows PowerShell. But when I try to run with Kotlin code it doesn’t work.

  val firstVideo = "D:\\Videos\\ffmpeg\\video.mp4"
  
  val secondVideo = "D:\\Videos\\ffmpeg\\video-2.mp4"
  
  val resultPath = "D:\\Videos\\ffmpeg\\result-2.mp4"
  
  
  
  val cmd = "ffmpeg -i $firstVideo -i $secondVideo -filter_complex \"[0:v:0] [0:a:0] [1:v:0] [1:a:0] concat=n=2:v=1:a=1 [v] [a]\" -map \"[v]\" -map \"[a]\" $resultPath"
  
  .split(" ").toTypedArray()
  
  
  
  Runtime.getRuntime().exec(cmd)

  I’m not taking any error messages since I’m using FFMPEG cli.

  Also, this piece of Kotlin works perfect when I’m trying to run other FFMPEG operations.

• xuggler encoder Java

  10 novembre 2014, par Gagan93

  This is a simple code which I am using to convert an .mp4 file to .mp3 file.

  import com.xuggle.mediatool.IMediaReader; 
  
  import com.xuggle.mediatool.IMediaWriter; 
  
  import com.xuggle.mediatool.ToolFactory; 
  
  import com.xuggle.xuggler.ICodec; 
  
  public class VideoToAudio {
  
      public void convertVideoToAudio(){
  
      IMediaReader reader = ToolFactory.makeReader("D://saada.mp4");
  
      IMediaWriter writer = ToolFactory.makeWriter("D://a.mp3",reader);
  
  
  
      int sampleRate = 44100;
  
      int channels = 1;
  
  
  
      writer.addAudioStream(0, 0, ICodec.ID.CODEC_ID_MP3, channels, sampleRate);
  
       reader.addListener(writer);
  
      while (reader.readPacket() == null);
  
      }
  
  
  
      public static void main(String [] args){
  
      VideoToAudio vta = new VideoToAudio();
  
      try{
  
          vta.convertVideoToAudio();
  
      }
  
      catch(Exception e){
  
          System.out.println("Could not open video file");
  
      }
  
      }

  I am getting the following error

  [main] ERROR org.ffmpeg - [mp3 @ 04CBF8A0] Invalid audio stream. Exactly one MP3 audio stream is required.
  [main] ERROR com.xuggle.xuggler - Error : could not write header for container (../../../../../../../csrc/com/xuggle/xuggler/Container.cpp:827)
  Could not open video file

  Any suggestions/ help ?