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• Issues with file created using FFMPEG

  31 mars 2020, par amateur

  I am a newbie to ffmpeg but currently using it Powershell to cut video clips from an mp4 file. What I am looking to do is cut a segment from a video and create a new mp4 file with such. I run the following command, see following example for one clip created. Run this multiple times with different start times and duration's through out the source file :

  



  -ss 00:02:42.9060000 -i "C:\Users\User\Desktop\MySourceVideo.mp4" -t 00:00:07.2800000 -c:v copy "C:\Users\User\Desktop\MyClip.mp4" -y -v quiet


  



  Source file is mp4, with H264 video codec, AAC video codec.

  



  While it creates the clips, I run it at different times in the source video creating multiple cut mp4 videos. When I look to play the newly created mp4 files, for some clips I find some inconsistencies, such as :

  



  

  • Playing the file for first few seconds just has black scream

  


  • Playing the file for first few seconds has video moving very fast and then normal again

  


  



  Some clips are perfect, others have the above issues. I would appreciate if my command could be checked in case I am missing a parameter or any further insight could be given ?

  


• 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.

• 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.