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• ffmpeg creating video with 1 minute empty space at the end of the video

  13 octobre 2022, par David Ruan

  I am using this command to generate a video with a cover page and an audio.

  


  ffmpeg -loop 1 -r 1 -i c :/temp/coverImage.jpeg -i C :/temp/out/input.mp3 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:a copy -shortest -c:v libx264 C :/temp/VideoOut/output.mp4

  


  But the generated mp4 file has 1 minute's of empty space after the audio finished.

  


  Actually I have multiple audio files, and after the conversion, every video has that 1 minute empty space.

  


  Any idea how to solve this ? Thanks a lot.

  


• iOS how to transcode mjpeg video to h264 video with ffmpeg ?

  16 août 2016, par J.Duan

  I want to transcode mjpeg format video to h264 video with ffmpeg.
  In fact , i found a ffmpeg based demo to get the goal but the app will crash when I play video with VLC or Vitamin . Does anyone have an iOS video-transcode demo or some ways to play MJPEG-format video except VLC and Vitamin ?

• How to convert ogv video file into Mp4 video format using Java

  16 février 2016, par Srinivasan Seenu

  I need to convert OGV VIDEO Format into MP4 VIDEO Format.

  • I use this below Java code to convert MP4 VIDEO Format to OGV VIDEO Format it is working fine.
  • For MP4 Format I use audio.setCodec(" AudioAttributes.DIRECT_STREAM_COPY") and video.setCodec("VideoAttributes.DIRECT_STREAM_COPY ").

  • But If I use this same code by change audio.setCodec(" libvorbis") and video.setCodec("mpeg4 ") it is not getting converted from Ogv to Mp4 Format. And also I try some codec in my sample program.

  • I am not able convert from Ogv to Mp4 Format.

  public class VideoConvert {
  
      public static void main(String[] args) throws IOException {
  
      File source = new File("D:\\readxml\\videoConvertorProject\\MP4toOGV\\mp4\\Sample1.ogv");
  
      File target = new File("D:\\readxml\\videoConvertorProject\\MP4toOGV\\ogv\\Sample2.mp4");
  
      AudioAttributes audio = new AudioAttributes();
  
      //audio.setCodec("libvorbis");
  
      audio.setCodec("libfaac");
  
      //audio.setCodec("libmp3lame");
  
      //audio.setCodec(AudioAttributes.DIRECT_STREAM_COPY);
  
      audio.setBitRate(new Integer(128000));
  
      audio.setSamplingRate(new Integer(44100));
  
      audio.setChannels(new Integer(2));
  
      VideoAttributes video = new VideoAttributes();
  
      video.setBitRate(new Integer(160000));
  
      video.setFrameRate(new Integer(15));
  
      //video.setSize(new VideoSize(176, 144));
  
      //video.setCodec("libtheora");
  
      video.setCodec("mpeg4");
  
      //video.setCodec(VideoAttributes.DIRECT_STREAM_COPY);
  
      EncodingAttributes attrs = new EncodingAttributes();
  
      attrs.setFormat("mp4");
  
      attrs.setAudioAttributes(audio);
  
      attrs.setVideoAttributes(video);
  
      Encoder encoder = new Encoder();
  
      try {
  
          encoder.encode(source, target, attrs);
  
      } catch (IllegalArgumentException e) {
  
          e.printStackTrace();
  
      } catch (InputFormatException e) {
  
          e.printStackTrace();
  
      } catch (EncoderException e) {
  
          e.printStackTrace();
  
      }
  
  }