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• ffmpeg replays a few seconds of video if there is a disconnect with -reconnect_at_eof 1 -reconnect_streamed 1

  18 janvier 2019, par Bruce B

  ffmpeg replays a few seconds of video if there is a disconnect with -reconnect_at_eof 1 -reconnect_streamed 1 options

  here is my command :
  c :\ffmpeg\ffmpeg.exe -seekable 0 -multiple_requests 1 -reconnect_at_eof 1 -reconnect_streamed 1 -reconnect_delay_max .5 -y -fflags +discardcorrupt -fflags +ignidx -fflags +igndts -fflags +genpts -fflags +nobuffer -i "http://192.168.192.27/iptv/?user=brbjr&action=tune&channel=2082&pool=pool1" -video_track_timescale 90000 -b:v 6000k -codec:a ac3 -f mpegts - | "C :\Program Files\VideoLAN\VLC\vlc.exe" -

  Here is a youtube video showing the issue https://youtu.be/Mlkc9N9UPts

  What I would like to happen is it just continue without the replay. I have been reading through the docs and can not find an answer.

  Thanks in advance for helping.

  Bruce

• Cannot find installation of real FFmpeg (which comes with ffprobe)

  29 mars 2023, par Asm Goni

  I was trying to fit a generator into a model and I got this error : 
AssertionError: Cannot find installation of real FFmpeg (which comes with ffprobe).

  



  I have looked over many of the solutions on GitHub and other questions on Stack Overflow but none of them worked for me.

  



  Here is one of the commands I ran :

  



  sudo add-apt-repository ppa:mc3man/trusty-media  
sudo apt-get update  
sudo apt-get install ffmpeg  
sudo apt-get install frei0r-plugins  


  



  pip list also indicates the presence of ffmpeg-1.4

  



  In addition, I tried force reinstalling and updating ffmpeg just in case any dependencies were not installed properly.

  



  I also set the skvideo's path for ffmpeg manually :

  



  skvideo.setFFmpegPath('/usr/local/lib/python3.6/dist-packages/ffmpeg/')


  



  This returns : /usr/local/lib/python3.6/dist-packages/skvideo/__init__.py:306: UserWarning: ffmpeg/ffprobe not found in path: /usr/local/lib/python3.6/dist-packages/ffmpeg/
  warnings.warn("ffmpeg/ffprobe not found in path: " + str(path), UserWarning)

  



  By the way, when I try installing, it also returns this error, I don't know what to do about this :

  



  Get:127 http://archive.ubuntu.com/ubuntu bionic/main amd64 vdpau-driver-all amd64 1.1.1-3ubuntu1 [4,674 B]
Fetched 60.4 MB in 7s (8,769 kB/s)
E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/w/wavpack/libwavpack1_5.1.0-2ubuntu1.1_amd64.deb  404  Not Found [IP: 91.189.88.149 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?


  



  I ran apt-get update --fix-missing and that didn't make anything better.

  



  Is there a solution to this ?

  


• FFmpeg : How to create rotating 3D(haas) effect in mp3 using ffmpeg ?

  30 octobre 2018, par Ankush

  I want to add a rotating 3d effect(Haas effect) in mp3. I mean that the audio will seem to change its directions from left to right and vice versa periodically(as shown below) when listened through the headphone. For this, I searched on the Internet and tried to achieve it in the following ways :

  1. Firstly, I thought, if I change the audio of the left and right channel periodically( Like when the Right channel has full volume(100%), Left channel has low volume(20%) and vice versa) then I can achieve it but it’s not like 3D.
  2. Secondly, When I researched more than found that It is done by creating a delay between the two channels. I found that I can create a delay of 0.0 to 0.8 milliseconds according to requirement.
     To do this, I use the following commands in FFmpeg :

  Step 1 : Splitting Audio Channels :

  ffmpeg -i D:\ffmpeg\Down.mp3 -map_channel 0.0.0 D:\ffmpeg\L.mp3 -map_channel 0.0.1 D:\ffmpeg\R.mp3

  Stem 2 : Splitting Left channel into parts :

  Note : We will only change the speed of Left channel so we split Left
  channel into 4 seconds parts.

  ffmpeg -i D:\ffmpeg\L.mp3 -f segment -segment_time 4 D:\ffmpeg\Split\%03d.mp3

  Step 3 : Changing the tempo of each part

  Now We change the tempo (speed) of each part so it may feel like the sound
  is moving from left to right and vice versa

  ffmpeg -y -i D:\ffmpeg\Split\000.mp3 -af atempo=1.0008 D:\ffmpeg\Modi\000.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\001.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\001.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\002.mp3 -af atempo=0.9992 D:\ffmpeg\Modi\002.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\003.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\003.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\004.mp3 -af atempo=1.0008 D:\ffmpeg\Modi\004.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\005.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\005.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\006.mp3 -af atempo=0.9992 D:\ffmpeg\Modi\006.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\007.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\007.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\008.mp3 -af atempo=1.0008 D:\ffmpeg\Modi\008.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\009.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\009.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\010.mp3 -af atempo=0.9992 D:\ffmpeg\Modi\010.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\011.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\011.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\012.mp3 -af atempo=1.0008 D:\ffmpeg\Modi\012.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\013.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\013.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\014.mp3 -af atempo=0.9992 D:\ffmpeg\Modi\014.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\015.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\015.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\016.mp3 -af atempo=1.0008 D:\ffmpeg\Modi\016.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\017.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\017.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\018.mp3 -af atempo=0.9992 D:\ffmpeg\Modi\018.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\019.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\019.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\020.mp3 -af atempo=1.0008 D:\ffmpeg\Modi\020.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\021.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\021.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\022.mp3 -af atempo=0.9992 D:\ffmpeg\Modi\022.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\023.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\023.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\024.mp3 -af atempo=1.0008 D:\ffmpeg\Modi\024.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\025.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\025.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\026.mp3 -af atempo=0.9992 D:\ffmpeg\Modi\026.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\027.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\027.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\028.mp3 -af atempo=1.0008 D:\ffmpeg\Modi\028.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\029.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\029.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\030.mp3 -af atempo=0.9992 D:\ffmpeg\Modi\030.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\031.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\031.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\032.mp3 -af atempo=1.0008 D:\ffmpeg\Modi\032.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\033.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\033.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\034.mp3 -af atempo=0.9992 D:\ffmpeg\Modi\034.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\035.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\035.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\036.mp3 -af atempo=1.0008 D:\ffmpeg\Modi\036.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\037.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\037.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\038.mp3 -af atempo=0.9992 D:\ffmpeg\Modi\038.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\039.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\039.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\040.mp3 -af atempo=1.0008 D:\ffmpeg\Modi\040.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\041.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\041.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\042.mp3 -af atempo=0.9992 D:\ffmpeg\Modi\042.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\043.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\043.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\044.mp3 -af atempo=1.0008 D:\ffmpeg\Modi\044.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\045.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\045.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\046.mp3 -af atempo=0.9992 D:\ffmpeg\Modi\046.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\047.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\047.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\048.mp3 -af atempo=1.0008 D:\ffmpeg\Modi\048.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\049.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\049.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\050.mp3 -af atempo=0.9992 D:\ffmpeg\Modi\050.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\051.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\051.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\052.mp3 -af atempo=1.0008 D:\ffmpeg\Modi\052.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\053.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\053.mp3
  
  ffmpeg -y -i D:\ffmpeg\Split\054.mp3 -af atempo=1.0000 D:\ffmpeg\Modi\054.mp3

  Here I used 1.0000 for normal speed
  and 1.0008 for increased speed
  and 0.9992 for decreased speed

  Spet 4 : Merging small pieces of audio

  ffmpeg -f concat -safe 0 -i D:\ffmpeg\f.txt -c copy D:\ffmpeg\output.mp3

  where f.txt contains :

  file 'D:\ffmpeg\Modi\000.mp3'
  
  file 'D:\ffmpeg\Modi\001.mp3'
  
  file 'D:\ffmpeg\Modi\002.mp3'
  
  file 'D:\ffmpeg\Modi\003.mp3'
  
  file 'D:\ffmpeg\Modi\004.mp3'
  
  file 'D:\ffmpeg\Modi\005.mp3'
  
  file 'D:\ffmpeg\Modi\006.mp3'
  
  file 'D:\ffmpeg\Modi\007.mp3'
  
  file 'D:\ffmpeg\Modi\008.mp3'
  
  file 'D:\ffmpeg\Modi\009.mp3'
  
  file 'D:\ffmpeg\Modi\010.mp3'
  
  file 'D:\ffmpeg\Modi\011.mp3'
  
  file 'D:\ffmpeg\Modi\012.mp3'
  
  file 'D:\ffmpeg\Modi\013.mp3'
  
  file 'D:\ffmpeg\Modi\014.mp3'
  
  file 'D:\ffmpeg\Modi\015.mp3'
  
  file 'D:\ffmpeg\Modi\016.mp3'
  
  file 'D:\ffmpeg\Modi\017.mp3'
  
  file 'D:\ffmpeg\Modi\018.mp3'
  
  file 'D:\ffmpeg\Modi\019.mp3'
  
  file 'D:\ffmpeg\Modi\020.mp3'
  
  file 'D:\ffmpeg\Modi\021.mp3'
  
  file 'D:\ffmpeg\Modi\022.mp3'
  
  file 'D:\ffmpeg\Modi\023.mp3'
  
  file 'D:\ffmpeg\Modi\024.mp3'

  Step 5 : The last operation is combining the both channels :

  ffmpeg -i D:\ffmpeg\L.mp3 -i D:\ffmpeg\output.mp3 -filter_complex [0:a][1:a]amerge=inputs=2[aout] -map [aout] D:\ffmpeg\LRM.mp3

  But even then the result is very poor. It looks like FFmpeg combines audio in Step 4 took a delay after each audio.

  I think there may be some bug in my solution. I don’t think that I can change tempo like this in audio without splitting the audio(Let me know if I am wrong).

  Does anyone have a different solution to achieve this ?
  Please help me in this. Thanks in advance...