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• ffmpeg is buffering 10 seconds of data every 10 seconds, but I need 1 second of data every second

  30 juillet 2014, par user306517

  I am trying to render an URL, and when I use ffmpeg to do it, it is giving me 10 seconds of data, every 10 seconds. I need to get the data in a way that I am getting 1 second of data every second.

  it looks like the URL i am trying to read from is a "m3u8" url, which contains a bunch of m3u8 files, which contain .ts files (transport stream).

  any help here would be appreciated.

  per suggestion - my ffmpeg command looks like this :

  ffmpeg -y -i ".....m3u8" -ar 32000 -ac 1 -acodec pcm_s16le /tmp/foo.wav

• How to make java JMF work to make a video using multiple images ?

  31 janvier 2013, par jeet

  I'm trying to use JMF to make a video using multiple jpg images.
  These images are also saved using ImageIO of Java itself.
  Unfortunately, I cannot find a code sample or a working code/class to accomplish make the video using JMF.

  There was a JpegImagesToMovie.java class here :
  http://www.oracle.com/technetwork/java/javase/documentation/jpegimagestomovie-176885.html
  but that link seems broken.

  Can someone please post a working code, or tell me some other way of making videos with java and a different class ?

  I think a working code on this page might help others like me in future.

  BTW, I also tried to use ffmpeg to compile the video, but that says similar to :

  image2 codec not found 

  When we use java ImageIO to make jpg images, are they not compatible with ffmpeg codecs ?

  java command :

  ImageIO.write(capture, "jpg", new File( uploadPath, filename));

  This is the ffmpeg error :

  ffmpeg.exe -f image2 -i pic\s%d.jpeg -vcodec mpeg2video vid\video.mpg
  
  FFmpeg version SVN-r7760, Copyright (c) 2000-2006 Fabrice Bellard, et al.
  
    configuration:  --enable-memalign-hack --enable-gpl --cpu=i686 --enable-swscaler --enable-pthreads --enable-avisynth --enable-mp3lame --enable-xvid --enable-x264 --enable-libnut --enable-libogg --enable-vorbis --enable-libtheora --enable-faad --enable-faac --enable-libgsm --enable-dts --enable-a52 --enable-amr_nb --enable-amr_wb 
  
    libavutil version: 49.2.0
  
    libavcodec version: 51.29.0
  
    libavformat version: 51.8.0
  
    built on Jan 29 2007 19:58:47, gcc: 3.4.6
  
  [image2 @ 00931554]Could not find codec parameters (Video: mjpeg)
  
  pic\sd.jpeg: could not find codec parameters

• FFprobe doesn't the work in node child_proces

  17 mai 2023, par Viktor Kushnir

  How to invoke the following command in a node.js :

  


  ffprobe -v quiet -of json -show_entries format a.aif


  


  I try to do :

  


  const ffprobe = child_process.spawn("ffprobe", [
      '-v', 
      'quiet', 
      '-of', 
      'json', 
      '-show_entries', 
      'format',
      filePath,
    ]);


  


  But it doesn't work. Tried other variants, but it doesn't work either. I need to get the metadata of the audio file in my application node, how do I do this with ffmpeg ?

  


  Only this work :

  


  const ffprobe = child_process.spawn("ffprobe", [
      filePath,
    ]);


  


  But I want to remove the data I don't need.