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• how can I take audio file(mp3) and video file(mp4) as input in Java spring ?

  29 juillet 2022, par Jawad Un Islam Abir

  I am using this code to read the audio file. but don't know how to take user input.

  


  InputStream inputStream = new FileInputStream("example.ogg");
FFmpegInput input = new FFmpegInput(inputStream);
FFmpegSourceStream stream = input.open(inputFormat);

stream.registerStreams();

AudioSourceSubstream audioSourceSubstream = null;
for(MediaSourceSubstream substream : stream.getSubstreams()) {
    if (substream.getMediaType() != MediaType.AUDIO) continue;

    audioSourceSubstream = (AudioSourceSubstream) substream;
}

if (audioSourceSubstream == null) throw new NullPointerException();


  


• python ffmpeg "The system cannot find the file specified" [on hold]

  5 avril 2016, par k7zheng

  I’m pretty new to Python but I’ve been stuck on this for a while.

  Whenever I run :

  import subprocess, os
  
  os.ffmpeg = "/absolute/path/to/ffmpeg"
  
  subprocess.ffmpeg = "/absolute/path/to/ffmpeg"
  
  
  
  subprocess.call(['ffmpeg', '-i', 'C://Users//k7zheng//Desktop//A1//1.avi', '-r', '0.05', "newfiles//%02d.png"])

  I get the following :

  Traceback (most recent call last):
  
  File "C:/Users/k7zheng/Desktop/FT1.py", line 4, in <module>
  
  subprocess.call(['ffmpeg -i C:\\Users\k\Desktop\A1\1.avi -r 0.05 "newfiles\%02d.png"'])
  
  File "C:\Python34\lib\subprocess.py", line 537, in call with Popen(*popenargs, **kwargs) as p:
  
  File "C:\Python34\lib\subprocess.py", line 859, in __init__
  
  restore_signals, start_new_session)
  
  File "C:\Python34\lib\subprocess.py", line 1114, in _execute_child
  
  startupinfo)
  
  FileNotFoundError: [WinError 2] The system cannot find the file specified
  
  </module>

  Can you help me spot my issue ?
  I’ve tried :

  • changing slashes / to \ to double \ slashes
  • getting rid of the 2nd and 3rd lines
  • adding os.chdir(r"C :\software\ffmpeg\ffmpeg-20160330-git-be746e-win64-static\bin")
  • changing line 4 to subprocess.call(’ffmpeg -i c :\users\k7zheng\desktop\c1\1 -r -0.05 "newfiles\%02d.png"’, shell=True)

  I’m running Python 3.4.4

• Covert a file from mp4 to a file that HTML can display

  26 juin 2019, par Trying_To_Understand

  I have a mp4 file and I want to display it in HTML. The problem is that it won’t, not only in HTML but also in my player. In VLC I can watch the video but there is no sound. Maybe the file is corrupted ?
  This is the output when I run ffmpeg -i my_file.mp4 :

  [h264 @ 000001b4afc61880] decode_slice_header error
  
  [h264 @ 000001b4afc61880] no frame!
  
  [h264 @ 000001b4afc61880] non-existing PPS 0 referenced
  
      Last message repeated 1 times
  
  [h264 @ 000001b4afc61880] decode_slice_header error
  
  [h264 @ 000001b4afc61880] no frame!
  
  Input #0, mpeg, from '150_2.mp4':
  
    Duration: 00:50:51.75, start: 13182.386222, bitrate: 983 kb/s
  
      Stream #0:0[0x1e0]: Video: h264 (High), yuv420p(progressive), 1280x720, 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Stream #0:1[0x1c0]: Audio: pcm_alaw, 8000 Hz, mono, s16, 64 kb/s
  
  At least one output file must be specified.

  Can I convert this with ffmpeg to a good quality of video and audio ?