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• how use pipe instead of save method in fluent-ffmpeg ?

  27 juin 2019, par Mohsen Rahnamaei

  I gonna use fluent ffmpeg to write something on video
  I use this cod

  var proc = ffmpeg(req.filePath). videoFilters(
  
    {
  
      filter: 'drawtext',
  
      options: {
  
        text: 'VERY LONG TEXT VERY VERY VERY VERY LOL!!!',
  
        fontsize: 36,
  
        fontcolor: 'white',
  
        x: '(main_w/2-text_w/2)',
  
        y: '(text_h/2)+15',
  
        shadowcolor: 'black',
  
        shadowx: 2,
  
        shadowy: 2
  
      }}
  
  
  
  )
  
  // use the 'flashvideo' preset (located in /lib/presets/flashvideo.js)
  
  .on('end', function() {
  
    console.log('file has been converted succesfully');
  
  })
  
  .on('error', function(err) {
  
    console.log('an error happened: ' + err.message);
  
  }).save('/home/gheidar/Desktop/ffmpeg_test/rt.ts');

  and everything is correct
  but I want to export this output to stream for the response of the request
  means that I want to use pipe() instead of save method

  something like this :

  var proc = ffmpeg(req.filePath). videoFilters(
  
    {
  
      filter: 'drawtext',
  
      options: {
  
        text: 'VERY LONG TEXT VERY VERY VERY VERY LOL!!!',
  
        fontsize: 36,
  
        fontcolor: 'white',
  
        x: '(main_w/2-text_w/2)',
  
        y: '(text_h/2)+15',
  
        shadowcolor: 'black',
  
        shadowx: 2,
  
        shadowy: 2
  
      }}
  
  
  
  )
  
  // use the 'flashvideo' preset (located in /lib/presets/flashvideo.js)
  
  .on('end', function() {
  
    console.log('file has been converted succesfully');
  
  })
  
  .on('error', function(err) {
  
    console.log('an error happened: ' + err.message);
  
  }).pipe(res)

  its just change in the last line
  and I get this error :

  an error happened: ffmpeg exited with code 1: pipe:1: Invalid argument

  how can export this ffmpeg command to stream response ????

• How to save a vedostream on an event using ffmpeg

  26 janvier 2015, par Ludo

  I want to record short video sequences of an online stream (IP CCTV or Internet) on a defined event.

  For example : I want to have two minutes before and one minute after an event occures stored in a output file.

  Is it possible to do this using ffmpeg (avconv) and what are the parameters to use.

  Thanks for your help !

• I keep having the message "MovieWriter ffmpeg unavailable ; using Pillow instead." I want to save as MP4 an animation

  6 décembre 2023, par Enrra

  I am doing an animation :

  


  animation = FuncAnimation(fig, update, frames=len(time_values), interval=250, repeat=False)
with a simple frame update function, I want it save it as a MP4 format :

  


  animation.save(f'{save_path}/heat_map.mp4', writer='ffmpeg', fps=10)

  


  I get the error message "MovieWriter ffmpeg unavailable ; using Pillow instead."

  


  I tried to do the following :

  


  plt.rcParams['animation.ffmpeg_path'] ='C:\\ProgramData\\Anaconda3\\LIB\\site-packages\\ffmpeg'
FFwriter = animation.FFMpegWriter()
animation.save(f'{save_path}/heat_map.mp4', writer = FFwriter, fps=10)


  


  This gets me an error message :

  


  Traceback (most recent call last):&#xA;  File "Graph_V1-8.py", line 406, in <module>&#xA;    FFwriter = animation.FFMpegWriter()&#xA;AttributeError: &#x27;FuncAnimation&#x27; object has no attribute &#x27;FFMpegWriter&#x27;&#xA;</module>

  


  and I also tried to do the following :
animation.save(f'{save_path}/heat_map.mp4', writer='ffmpeg', fps=10, codec='libx264')

  


  which also get me the error :
"MovieWriter ffmpeg unavailable ; using Pillow instead."

  


  When I write :

  


  pip install ffmpeg
Requirement already satisfied: ffmpeg in c:\programdata\anaconda3\lib\site-packages (1.4)


  


  Thank you in advance for your help