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• FFMpeg : how to merge video and audio and tail align video to audio length ?

  28 septembre 2021, par Bobby

  I have a video file and an audio file to merge together. Audio duration is shorter than video. I want to align them at tail and cut off the head part of the video.

  


  Graph illustration :

  


  [xxxx------] video
    [------] audio
    [======] merged


  


  Where "x" parts of the video is removed.

  


  The duration of the video/audio is unknown but the audio duration is guaranteed to be shorter than video. The reason of it being unknown is because I'm generating video dynamically and pipe to FFmpeg, so it is not possible to know the duration beforehand.

  


• Create animation video or applying different effect on video from set of images [on hold]

  9 janvier 2016, par Mehul Dudhat

  I tried with FFmpeg but it’s not showing any effect with created video.

  I tried below command with FFmpeg lib :

  ffmpeg -f image2 -r 1/5 -i /&lt;<dir path="path">>/img/img%d.jpg -vcodec libx264 /&lt;<dir path="path">>/output_video.mp4
  
  </dir></dir>

  The image generated video :

  https://flic.kr/p/CWtxhi

  Is there any other library available to add effect or animation on video during the creation from set of images ?

  I would like to give this type of animation or effect :

  https://animoto.com/play/rXBG1fIq9FWN00O7R7wKyQ

• Command of FFMPEG to make a video from Image(JPEG) + Audio(.mp3) & Share video in Whatsapp

  22 novembre 2018, par Neel Mevada

  I am trying to create a video .mp4 file from .mp3 audio & .jpeg image.

  I am able to make a video and able to play in Video Players in Android devices.

  But after creation of file when i tried to Share that Video in Whatsapp, at that time it shows a message "The file format not supported".

  I am using below FFMPEG Command :

  "-loop 1 -r 1 -i " + imageFilePath + " -i " + audioFilePath + " -c:v libx264 -crf 27 -tune stillimage -c:a copy -pix_fmt yuv420p -preset ultrafast -shortest " + pathOutputVideo(sectionName);

  And for Sharing video , i am using below Code :

    MediaScannerConnection.scanFile(ShareQuestionAudioActivity.this, new String[]{FfmpegController.pathOutputVideo(qModel.getSectionName().toUpperCase().replaceAll(" ", "_"))},
  
                  null, new MediaScannerConnection.OnScanCompletedListener() {
  
                      public void onScanCompleted(String path, Uri uri) {
  
                          Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND);
  
                          shareIntent.setType("video/*");
  
                          shareIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse(FfmpegController.pathOutputVideo(qModel.getSectionName().toUpperCase().replaceAll(" ", "_"))));
  
                          startActivity(Intent.createChooser(shareIntent, "Share Question"));
  
                      }
  
                  });

  From this Link I found that i need to use H264 + AAC. but still not able to share video with supported file format