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• avformat/libopenmpt : Probe file format from file data if possible

  21 février 2018, par Jörn Heusipp

  avformat/libopenmpt : Probe file format from file data if possible
  When building with libopenmpt 0.3, use the libopenmpt file header
  
  probing functions for probing. libopenmpt probing functions are
  
  allocation-free and designed to be as fast as possible.
  For libopenmpt 0.2, or when libopenmpt 0.3 file header probing cannot
  
  probe successfully due to too small probe buffer, test the filename
  
  against the file extensions supported by the libopenmpt library that
  
  is actually linked, instead of relying on a hard-coded file extension
  
  list. File extension testing is also allocation-free and designed to
  
  be fast in libopenmpt. Avoiding a hard-coded file extension list is
  
  useful because later libopenmpt versions will likely add support for
  
  more module file formats.
  libopenmpt file header probing is tested regularly against the FATE
  
  suite and other diverse file collections by libopenmpt upstream in
  
  order to avoid false positives.
  FATE passes with './configure —enable-libopenmpt' as well as with
  
  './configure —enable-libopenmpt —enable-libmodplug'.
  libopenmpt probing adds about 5%..10% cpu time (depending on precise
  
  usage pattern and host CPU and compiler version used for libopenmpt)
  
  compared to all current internal FFmpeg probing functions combined in
  
  tools/probetest for all of its module formats combined (currently 41
  
  modules formats in libopenmpt 0.3.4 and 234 file formats in FFmpeg).
  Signed-off-by : Jörn Heusipp <osmanx@problemloesungsmaschine.de>
  
  Reviewed-by : Josh de Kock <josh@itanimul.li>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/libopenmpt.c

• Write, with ffmpeg, every 30 seconds wav file from ip stream to file.temp and change the name to timestamp.wav after

  18 juillet 2018, par Eliya

  I’m using ffmpeg to record IP stream and write every 30 seconds to wav file.

  Here is my bash script code :

  #!/bin/bash
  
  function start_ffmpeg_stream ()
  
  {
  
      address=$1 #This is IP stream address
  
      ffmpeg_option=$2 # "?overrun_nonfatal=1&fifo_size=250000"
  
      folder_name=$3 #folderName
  
      channel_number=$4 #i
  
      #local pid      
  
      ffmpeg  -loglevel 8 -thread_queue_size 1500 -i "$address$ffmpeg_option" -c copy\
  
          -vn -f segment -segment_time 30 -ar 8000 -acodec pcm_s32le -ac 1 -strftime 1 /"$folder_name"/"X$channel_number""_""%s.wav"&     
  
      pid=$!
  
      echo "$Start ffmpeg, pid is - $pid" 
  
      __="$pid"
  
  }
  
  ffmpegOptions="?overrun_nonfatal=1&fifo_size=250000"
  
  folderName="/wav_files"
  
  start_ffmpeg_stream "udp://224.10.0.1"  "$ffmpegOptions" "$folderName" "1"

  Now the wav file name is like "X000001_unix_time_stamp.wav".

  I want to write the file name in writeing time something like "X000001_unix_time_stamp.temp"

  And when the 30 seconds done and the FFmpeg finish to write this 30 seconds, I want that FFmpeg changes the name to "X000001_unix_time_stamp.wav"

  And keep writing next 30 seconds.

  The only change that i want is, when FFmpeg writing it write in temp name and after FFmpeg finish to write it change the name.

  It’s seem to case when i donloaded a file so until the donload not finish the file has a temp name and when it done the name change to const name.

• how to cut audio file and merge with video file in android ?

  27 avril 2016, par Mayank Sugandhi

  I want to cut audio and merge audio file with video programmatically in android.

  I don’t Know how to use FFMPEG library in windows, Can You tell me how to integrate Or if any other solution ? I am finding the answer this question from last 3 months 15 days, still i am not able to get correct answer

  Please Help Me,

  Thank You for Appreciation.