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• create AVI file from compressed data

  3 décembre 2015, par Qureshi

  I am using ffmpeg libararies to create an AVI file as mentioned in the post (Make AVI file from H264 compressed data), this guy had the same problem as i currently have (i-e getting error value -22.

  Please anyone can explain me what’s the meaning of this error code "-22" that i get from "av_interleaved_write_frame" ?

  he suggested that "By setting pts and dts with AV_NOPTS_VALUE I’ve solved the problem." please share any example how to set pts value with AV_NOPTS_VALUE ? and what should be the value of pts any rought estimate ?

• Error while saving a matplotlib animation, missing 'dpi' argument

  27 septembre 2020, par aarcas

  I'm trying to save an animation of matplotlib.animation.AnimationFunc and I get an error saying 'dpi' argument missing. Obviously, I have the dpi set so I don't understand where this error comes from.

  



  I'm running python 3.6 and matplotlib 3.0.3, I also just installed ffmpeg from ubuntu official repositories (Ubuntu 18.04).

  



  This is the part of my code that should affect that, although I think it should be something of the system :

  



  Writer = writers['ffmpeg']
writer = Writer(fps=15, metadata=dict(artist='Me'), bitrate=1800,)
ani = FuncAnimation(fig, anime, interval=time_step *
                    10**3, frames=F, repeat=False,) 
ani.save('standard_map.mp4', writer=Writer, dpi=100)


  



  The errors is :

  



  with writer.saving(self._fig, filename, dpi):
File "/usr/lib/python3.6/contextlib.py", line 159, in helper
    return _GeneratorContextManager(func, args, kwds)
File "/usr/lib/python3.6/contextlib.py", line 60, in __init__
    self.gen = func(*args, **kwds) TypeError: saving() missing 1 required positional argument: 'dpi'


  



  I tried both adding the lines they suggested there and the error stills the same.

  



  plt.rcParams['animation.ffmpeg_path'] = '/usr/bin/ffmpeg'


  



  I also tried changing the writer to 'imagemagick' the one set on Ubuntu by default and the error persists.

  


• ffmpeg expert to help me with an encoding problem [closed]

  22 août 2022, par Michael Heuberger

  I'm the developer of www.videomail.io and experience issues with audio. It's a heavily used, free service to enable Deaf people to email in Sign Language. Runs on ffmpeg (under node-fluent-ffmpeg) and JavaScript (Node.js).

  


  Since I am Deaf myself, I am unable to repair some audio-related issues while muxing video with audio together on server side via ffmpeg. Reason for adding audio is to expand the target audience.

  


  That said, I'm searching for someone to help me with this. It's a paid job !

  


  Requirements :

  


  

  • Must know ffmpeg very well, especially on how to encode audio (WAV) and video (MP4) together without any audio delays.

  


  • Knowing JavaScript would be a massive plus for writing code

  


  • Has time in the following weeks, I guess about 10 hours or so.

  


  


  If you are keen, ping me please. My page is www.binarykitchen.com - thanks !