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• input stream error _read() is not implemented : ffmpeg-fluent

  23 mai 2018, par Thomsheer Ahamed

  I have buffer object. I want to pass that buffer as readable stream to ffpmeg.

  var ffmpeg = require('fluent-ffmpeg');
  
      var ffmpegPath = require("ffmpeg-binaries").ffmpegPath()
  
      ffmpeg.setFfmpegPath(ffmpegPath);
  
      var command = new ffmpeg();
  
  
  
      command.input(my_buffer)
  
          .videoCodec('libx264')
  
          .size('520x?')
  
          .aspect('4:3')
  
          .inputFPS(8)
  
          .outputFPS(30)
  
          .output('new_video.mp4')
  
          .on('start', onStrat)
  
          .on('progress', onProgress)
  
          .on('end', onEnd)
  
          .on('error', onError)
  
          .run();

  If I pass buffer right away I will get "Error : Invalid input
  at FfmpegCommand.proto.mergeAdd.proto.addInput.proto.input"

  So I converted buffer into stream using

  function bufferToStream(buffer) {
  
      let Duplex = require('stream').Duplex;
  
      let stream = new Duplex();
  
      stream.push(new Buffer(buffer));
  
      stream.push(null);
  
      return stream;
  
  }
  
  var red = bufferToStream(finalResponse.file.buffer);

  and passed this steam to input

  command.input(red)

  Above Command throws "ffmpeg exited with code 1 : Error opening filters !" ;

  If I use my_buffer and save it in locally using fs.writeFile(’path’,my_buffer) and pass this path to input of ffmpeg then it works fine..

  But I dont want to store that file and then delete it after altering video.

  Can some one help me ?

  I Reffered this example

• aacenc : implement Intensity Stereo encoding support

  2 juillet 2015, par Rostislav Pehlivanov

  aacenc : implement Intensity Stereo encoding support
  This commit implements intensity stereo coding support
  
  to the native aac encoder. This is a way to increase the efficiency
  
  of the encoder by zeroing the right channel’s spectral coefficients
  
  (in a channel pair) and rederiving them in the decoder using information
  
  from the scalefactor indices of special band types. This commit
  
  confomrs to the official ISO 13818-7 specifications, although due to
  
  their ambiguity certain deviations have been taken to ensure maximum
  
  sound quality. This commit has been extensively tested and has shown
  
  to not result in audiable audio artifacts unless in extreme cases.
  
  This commit also adds an option, aac_is, which has the value of
  
  0 by default. Intensity Stereo is part of the scalable aac profile
  
  and is thus non-default.
  The way IS coding works is that it rederives the right channel’s
  
  spectral coefficients from the left channel via the scalefactor
  
  index values left in the right channel. Since an entire band’s
  
  spectral coefficients do not need to be coded, the encoder’s
  
  efficiency jumps up and it unzeroes some high frequency values
  
  which it previously did not have enough bits to encode. That way
  
  less information is lost than the information lost by rederiving
  
  the spectral coefficients with some error. This is why the
  
  filesize of files encoded with IS do not decrease significantly.
  
  Users wishing that IS coding should reduce filesize are expected
  
  to reduce their encoding bitrates appropriately.
  This is V2 of the commit. The old version did not mark ms_mask as
  
  0 since M/S and IS coding are incompactible, which resulted in
  
  distortions with M/S coding enabled. This version also improves
  
  phase detection by measuring it for every spectral coefficient in
  
  the band and using a simple majority rule to determine whether the
  
  coefficients are in or out of phase. Also, the energy values per
  
  spectral coefficient were changed as to reflect the
  
  official specifications.
  Reviewed-by : Claudio Freire <klaussfreire@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavcodec/aaccoder.c
  • [DH] libavcodec/aacenc.c
  • [DH] libavcodec/aacenc.h

• TypeError : must be real number, not NoneType using spyder anaconda

  13 août 2023, par faisal2k

  import moviepy.editor as mp
import tkinter as tk
from tkinter import filedialog
import math
from PIL import Image
import numpy


def zoom_in_effect(clip, zoom_ratio=0.02):
    def effect(get_frame, t):
        img = Image.fromarray(get_frame(t))
        base_size = img.size

        new_size = [
            math.ceil(img.size[0] * (1 + (zoom_ratio * t))),
            math.ceil(img.size[1] * (1 + (zoom_ratio * t)))
        ]

        # The new dimensions must be even.
        new_size[0] = new_size[0] + (new_size[0] % 2)
        new_size[1] = new_size[1] + (new_size[1] % 2)

        img = img.resize(new_size, Image.LANCZOS)

        x = math.ceil((new_size[0] - base_size[0]) / 2)
        y = math.ceil((new_size[1] - base_size[1]) / 2)

        img = img.crop([
            x, y, new_size[0] - x, new_size[1] - y
        ]).resize(base_size, Image.LANCZOS)

        #result = numpy.array(img)
        result = numpy.array(img, dtype=numpy.uint8)

        img.close()

        return result

    return clip.fl(effect)


    

def make_center_video():
    
    size = (1080, 1080)

    audio_file = '/home/faisal/pythonfiles/audio/tts_voice.wav'
    audio = mp.AudioFileClip(audio_file)
   
    root = tk.Tk()
    root.withdraw()
     
    print("waiting for Image Selection....")

    img = filedialog.askopenfilename()


    slide = mp.ImageClip(img).set_fps(29).set_duration(audio.duration).resize(size)
    slide = zoom_in_effect(slide, 0.02)
    slide.write_videofile('/home/faisal/pythonfiles/videos/zoom-short.mp4',codec='libx264',  fps=29)
    
    
    size = (600, 600)

 


    slide = mp.ImageClip(img).set_fps(29).set_duration(audio.duration).resize(size)
    slide = zoom_in_effect(slide, 0.02)
    slide.write_videofile('/home/faisal/pythonfiles/videos/zoom-wide.mp4',codec='libx264', fps=29)
    
import traceback

try:
    make_center_video()
except Exception as e:
    traceback.print_exc()
    print(f"An error occurred: {e}")


  


  I'm trying to make the zoom video using image but facing

  


  TypeError: must be real number, not NoneType.


  


  It used was to run but I don't remember if I might have updated numpy, ffmpeg, or any thing else that is now causing the error. I have tried the code on python 3.10 and 3.11 and get the same error in both. I was previously running it on python 3.10.

  


  An error occurred: must be real number, not NoneType&#xA;Traceback (most recent call last):&#xA;  File "/home/faisal/pythonfiles/code/zoom_video.py", line 76, in <module>&#xA;    make_center_video()&#xA;  File "/home/faisal/pythonfiles/code/zoom_video.py", line 61, in make_center_video&#xA;    slide.write_videofile(&#x27;/home/faisal/pythonfiles/videos/zoom-short.mp4&#x27;,codec=&#x27;libx264&#x27;,  fps=29)&#xA;  File "/home/faisal/anaconda3/envs/py-310/lib/python3.10/site-packages/decorator.py", line 232, in fun&#xA;    return caller(func, *(extras &#x2B; args), **kw)&#xA;  File "/home/faisal/anaconda3/envs/py-310/lib/python3.10/site-packages/moviepy/decorators.py", line 54, in requires_duration&#xA;    return f(clip, *a, **k)&#xA;  File "/home/faisal/anaconda3/envs/py-310/lib/python3.10/site-packages/decorator.py", line 232, in fun&#xA;    return caller(func, *(extras &#x2B; args), **kw)&#xA;  File "/home/faisal/anaconda3/envs/py-310/lib/python3.10/site-packages/moviepy/decorators.py", line 135, in use_clip_fps_by_default&#xA;    return f(clip, *new_a, **new_kw)&#xA;  File "/home/faisal/anaconda3/envs/py-310/lib/python3.10/site-packages/decorator.py", line 232, in fun&#xA;    return caller(func, *(extras &#x2B; args), **kw)&#xA;  File "/home/faisal/anaconda3/envs/py-310/lib/python3.10/site-packages/moviepy/decorators.py", line 22, in convert_masks_to_RGB&#xA;    return f(clip, *a, **k)&#xA;  File "/home/faisal/anaconda3/envs/py-310/lib/python3.10/site-packages/moviepy/video/VideoClip.py", line 300, in write_videofile&#xA;    ffmpeg_write_video(self, filename, fps, codec,&#xA;  File "/home/faisal/anaconda3/envs/py-310/lib/python3.10/site-packages/moviepy/video/io/ffmpeg_writer.py", line 213, in ffmpeg_write_video&#xA;    with FFMPEG_VideoWriter(filename, clip.size, fps, codec = codec,&#xA;  File "/home/faisal/anaconda3/envs/py-310/lib/python3.10/site-packages/moviepy/video/io/ffmpeg_writer.py", line 88, in __init__&#xA;    &#x27;-r&#x27;, &#x27;%.02f&#x27; % fps,&#xA;TypeError: must be real number, not NoneType&#xA;</module>