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• lavu : add new D3D11 pixfmt and hwcontext

  6 juin 2017, par wm4

  lavu : add new D3D11 pixfmt and hwcontext
  To be used with the new d3d11 hwaccel decode API.
  With the new hwaccel API, we don’t want surfaces to depend on the
  
  decoder (other than the required dimension and format). The old D3D11VA
  
  pixfmt uses ID3D11VideoDecoderOutputView pointers, which include the
  
  decoder configuration, and thus is incompatible with the new hwaccel
  
  API. This patch introduces AV_PIX_FMT_D3D11, which uses ID3D11Texture2D
  
  and an index. It’s simpler and compatible with the new hwaccel API.
  The introduced hwcontext supports only the new pixfmt.
  Frame upload code untested.
  Significantly based on work by Steve Lhomme <robux4@gmail.com>, but with
  
  heavy changes/rewrites.
  Signed-off-by : Diego Biurrun <diego@biurrun.de>
  

  • [DBH] doc/APIchanges
  • [DBH] libavutil/Makefile
  • [DBH] libavutil/hwcontext.c
  • [DBH] libavutil/hwcontext.h
  • [DBH] libavutil/hwcontext_d3d11va.c
  • [DBH] libavutil/hwcontext_d3d11va.h
  • [DBH] libavutil/hwcontext_internal.h
  • [DBH] libavutil/pixdesc.c
  • [DBH] libavutil/pixfmt.h
  • [DBH] libavutil/version.h

• Issue with adding FFMPEG to macOS path to convert mp3 to WAV in Python [closed]

  30 mai 2024, par AndrewLittle1

  I am trying to use a simple program to convert a .MP3 file to a .WAV file in python :

  


  from os import path
from pydub import AudioSegment

src = "test1.mp3"
dst = "test1.wav"

# convert wav to mp3                                                            
sound = AudioSegment.from_mp3(src)
sound.export(dst, format="wav")


  


  When I try to run the program in an IDE, I am getting a FileNotFoundError this is what the StackTrace looks like :

  


  RuntimeWarning: Couldn't find ffprobe or avprobe - defaulting to ffprobe, but may not work
  warn("Couldn't find ffprobe or avprobe - defaulting to ffprobe, but may not work", RuntimeWarning)

...

[Errno 2] No such file or directory: 'ffprobe': 'ffprobe'


  


  I know this error means that the IDE is not able to locate my FFMPEG (because it is not in the correct path). I downloaded FFMPEG, FFPROBE is located in the FFMPEG library using :

  


  pip install FFMPEG


  


  However, even when I try to run the program from the command line using

  


  python soundtest.py


  


  I am getting another FileNotFoundError :

  


  File "soundtest.py", line 13, in <module>&#xA;    with open(&#x27;simple.html&#x27;) as html_file:&#xA;FileNotFoundError: [Errno 2] No such file or directory: &#x27;simple.html&#x27;&#xA;&#xA;</module>

  


  I am not sure why this is happening because despite FFMPEG not being in the correct path to be accessed by the IDE I cannot run it from the command line either.

  


  Ideally, I would like to add the FFMPEG library to the system path so that it can be accessed, but I can't even get it to run from the command line. Any ideas what's going on here ?

  


  The answer provided here also helps give more insight, but I am still running into my same error, Ffmpeg on idle python Mac

  


• Inputting files in different folders as arguments to ffmpeg in Python

  20 janvier 2016, par John Stanford

  I’m working on a program using ffmpeg in Python and I’m trying to stack a bunch of PNG images into a video. I want to keep the code on my Dropbox but use the local hard drive to do the work, so I when I input the files as arguments, I want to include the directory. The code below makes the raw input file just fine, but when I try to begin a pipe with ffmpeg, it tells me it can’t find the input file. Is there some special way to format this if the input file is in a different directory ? I’ve had similar code work fine with the files all located in the same folder. Thanks !

  import subprocess as sp
  
  
  
  import numpy as np
  
  import matplotlib.pyplot as plt
  
  
  
  import os
  
  import shutil
  
  
  
  import tkinter.filedialog as tkFileDialog
  
  
  
  FFMPEG_BIN = 'ffmpeg.exe'
  
  
  
  def readImages(pathToImages):
  
      filenames = os.listdir(path=pathToImages)
  
      f = open("C:\\Users\johnwstanford\Desktop\outputfile.raw", "wb")
  
  
  
      for file in filenames:
  
          print(file)
  
          image = plt.imread(pathToImages + '/' + file)
  
          image = np.delete(image, 3, 2)*255
  
  
  
          f.write(image.tobytes())
  
      f.close()
  
  
  
  readImages(tkFileDialog.askdirectory())
  
  
  
  command2 = [FFMPEG_BIN,
  
             '-y',
  
             '-f', 'rawvideo',
  
             '-vcodec', 'rawvideo',
  
             '-s', '1600x1200',
  
             '-pix_fmt', 'rgb24',
  
             '-r', '25',
  
             '-i', "C:\\Users\johnwstanford\Desktop\outputfile.raw",
  
             "C:\\Users\johnwstanford\Desktop\output.mp4"]
  
  
  
  pipe2 = sp.Popen(command2, stdin = sp.PIPE, stderr=sp.PIPE)
  
  print(pipe2.communicate()[1])
  
  pipe2.kill()
  
  os.remove("C:\\Users\johnwstanford\Desktop\outputfile.raw")