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• Require assistance with filtergraph contruction using ffmped

  31 décembre 2022, par D-MAN

  problem : I manually make videos, and have decided to make a program to automatically make the video for me. Here is an example of the videos that i am trying to achieve. E.g : https://youtu.be/eVQ9ysp0Pj0 (videos are displayed at 19 seconds into the video). This is the desired result i am trying to achieve. I have the following filter graph that has most of the elements :

  


  exe = "-i " + file + " -i " + frame + " -i " + framestart + " -i " + frameEnd + " -i " + audioOverlay + " -filter_complex \"[0:v]pad="+mVideoWidth+":"+mVideoHeight+":576:0[vpad]; [vpad][1]overlay[vframed]; [vframed]split=3[vfr1][vfr2][vfr3]; [vfr1]reverse[vrev]; [vfr2][vrev][vfr3]concat=n=3,setpts=1*(PTS-STARTPTS)[vboom]; [vboom][2]overlay=enable='lte(t,2)'[vpreout]; [vpreout][3]overlay=enable='gte(t,"+msec+"*3*0.5-2)'\" -map 4:a -b:v 8000k -shortest -preset ultrafast -crf 23 " + file2.getAbsolutePath();


  


  The only elements which i am struggling with is the sections that speed up momentarily and then return back to normal speed. it speeds up and returns to normal speed twice when the video plays forward, then reverses, then has the speed up effect twice while the video plays backwards. it speeds up for 1 second then continues playing the video at normal speed. Your help is greatly appreciated !

  


  I have tried setpts=1*(PTS-STARTPTS)[vrev] and other sections of the filter graph, but im relatively new to ffmpeg and do not completely understand how it all works. I have tried the following links too. https://trac.ffmpeg.org/wiki/How%20to%20speed%20up%20/%20slow%20down%20a%20video & https://video.stackexchange.com/questions/21800/ffmpeg-slow-fast-motion-part-a-video-anywhere

  


• UnsupportedAudioFileException in LIUM Speaker Diarization after re-sampling

  14 septembre 2016, par RAVI D PARIKH

  I am trying to configure LIUM tool for speaker diarization. This question is a follow up of UnsupportedAudioFileException in LIUM Speaker Diarization

  I have tried re sampling the file using sox and ffmpeg

  I am new to any sorts of programming and i have followed all steps described in LIUM quick start guide and the above link. I still get the same error. I think my input file has issues related to header as mentioned by Nikolay Shmyrev in the above link however i have no clue on how to solve it.

  My code is as below :

  java –jar  C:\Users\Ravi\Desktop\LIUM_SpkDiarization-8.4.1.jar \ --fInputMask= C:\Users\Ravi\Desktop\converted_f2.wav--sOutputMask= C:\Users\Ravi\Desktop\converted_converted_2.seg -–help --doCEClustering

  Error :

  10:52.037 SEVERE AudioFeatureSetFa  FileNotFoundException
  
  java.io.FileNotFoundException:
  
          at java.io.FileInputStream.open0(Native Method)
  
          at java.io.FileInputStream.open(Unknown Source)
  
          at java.io.FileInputStream.<init>(Unknown Source)
  
          at com.sun.media.codec.audio.mp3.JS_MP3FileReader.getAudioFileFormat(JS_MP3FileReader.java:82)
  
          at javax.sound.sampled.AudioSystem.getAudioFileFormat(Unknown Source)
  
          at fr.lium.spkDiarization.libFeature.AudioFeatureSetFactory.getAudio(AudioFeatureSetFactory.java:162)
  
          at fr.lium.spkDiarization.libFeature.AudioFeatureSetFactory.MakeFeature(AudioFeatureSetFactory.java:207)
  
  </init>

  The input file is at https://drive.google.com/file/d/0B7Fqe9EX5JbgT09BcXpSREd4em8/view?usp=sharing

  Input File Name:converted_f2.wav

  I have put the command and the full output of the prompt in a word document at

  https://drive.google.com/file/d/0B7Fqe9EX5JbgUUl6THNCZFgxRnM/view?usp=sharing

  The inpiut file has correct sampling rate and other parameters and thus i am not able to understand the cause of the error.
  Thanks a lot for the help

  Regards,
  Ravi

• FFMPEG : how to select audio stream without language metadata

  2 décembre 2020, par riofly

  I have some source Video files with one or more audio streams inside.
  
I would to encode each source file with Italian language. Then I can do it.

  


  ffmpeg -i source-file.avi -c:v ... -c:a ... -map 0:a:m:language:ita ...


  


  But some source file has audio stream without Language metadata.
  
I look that it is possible to set Language metadata with "und" special value. Then I try to select the audio stream with this command :

  


  ffmpeg -i source-file.avi -c:v ... -c:a ... -map 0:a:m:language:ita? -map 0:a:m:language:und? ...


  


  (the " ?" char say to ffmpeg that he do not fire exception if the audio stream do not exists).
  
Unfortunatelly this command do not works... It seems that ffmpeg search the "und" language instead of search a audio stream "without" language.

  


  Video MetaData

  


  This is the video MetaData where audio stream do not have language value :

  


  Input #0, matroska,webm, from 'D:\My-Video.mkv':
  Metadata:
    title           : My-Video
    encoder         : libebml v1.3.3 + libmatroska v1.4.4
    creation_time   : 2016-01-20T16:02:03.000000Z
  Duration: 01:15:28.93, start: 0.000000, bitrate: 2775 kb/s
    Stream #0:0: Video: h264 (High), yuv420p(progressive), 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 1k tbn, 50 tbc (default)
    Metadata:
      BPS             : 2387529
      BPS-eng         : 2387529
      DURATION        : 01:15:28.920000000
      DURATION-eng    : 01:15:28.920000000
      NUMBER_OF_FRAMES: 113223
      NUMBER_OF_FRAMES-eng: 113223
      NUMBER_OF_BYTES : 1351616420
      NUMBER_OF_BYTES-eng: 1351616420
      _STATISTICS_WRITING_APP: mkvmerge v8.7.0 ('All of the above') 64bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v8.7.0 ('All of the above') 64bit
      _STATISTICS_WRITING_DATE_UTC: 2016-01-20 16:02:03
      _STATISTICS_WRITING_DATE_UTC-eng: 2016-01-20 16:02:03
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:1: Audio: ac3, 48000 Hz, 5.1(side), fltp, 384 kb/s (default)
    Metadata:
      BPS             : 384000
      BPS-eng         : 384000
      DURATION        : 01:15:28.928000000
      DURATION-eng    : 01:15:28.928000000
      NUMBER_OF_FRAMES: 141529
      NUMBER_OF_FRAMES-eng: 141529
      NUMBER_OF_BYTES : 217388544
      NUMBER_OF_BYTES-eng: 217388544
      _STATISTICS_WRITING_APP: mkvmerge v8.7.0 ('All of the above') 64bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v8.7.0 ('All of the above') 64bit
      _STATISTICS_WRITING_DATE_UTC: 2016-01-20 16:02:03
      _STATISTICS_WRITING_DATE_UTC-eng: 2016-01-20 16:02:03
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:2(ita): Subtitle: dvd_subtitle, 720x576 (default)
    Metadata:
      BPS             : 2218
      BPS-eng         : 2218
      DURATION        : 01:09:57.232000000
      DURATION-eng    : 01:09:57.232000000
      NUMBER_OF_FRAMES: 965
      NUMBER_OF_FRAMES-eng: 965
      NUMBER_OF_BYTES : 1163769
      NUMBER_OF_BYTES-eng: 1163769
      _STATISTICS_WRITING_APP: mkvmerge v8.7.0 ('All of the above') 64bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v8.7.0 ('All of the above') 64bit
      _STATISTICS_WRITING_DATE_UTC: 2016-01-20 16:02:03
      _STATISTICS_WRITING_DATE_UTC-eng: 2016-01-20 16:02:03
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES


  


  Can someone help me ?
  
Thanks !