Recherche avancée

Sur d’autres sites (7356)

• how to stop a function from a button in tkinter

  11 mars 2020, par Cb9867

  I am trying to record audio from microphone in python with the help of ffmpeg.

  By using this i am able to record voice but how can i stop this function by clicking of a button.

  to stop this now i am terminating the IDLE forcefully.

  import os
  
  import subprocess
  
  import tkinter as tk
  
  from tkinter import *
  
  root = Tk()
  
  os.chdir('C://Users/ravir/desktop/')
  
  def recording_voice():
  
    global p
  
    p=subprocess.Popen('ffmpeg -f dshow -i audio="Microphone (2- High Definition Audio Device)" sample.mp3' )
  
  
  
  def stop_rec():  # ho to stop this ???
  
      p.terminate()
  
  
  
  rec_btn = Button(text='Start Recording', width=20, command=recording_voice)
  
  rec_btn.pack()
  
  
  
  stop_btn = Button(text='Stop Recording', width=20, command=stop_rec)
  
  stop_btn.pack()
  
  
  
  root.mainloop()

• libavcodec/amfenc : Fix issue with missing headers in AV1 encoder

  12 juillet 2023, par Evgeny Pavlov

  libavcodec/amfenc : Fix issue with missing headers in AV1 encoder
  This commit fixes issue with missing SPS/PPS headers in video
  
  encoded by AMF AV1 encoder.
  
  Missing headers leads to broken seek in MPV video player.
  
  Default value for property AV1_HEADER_INSERTION_MODE shouldn't be setup
  
  to NONE (no headers insertion). We need to skip definition of this property,
  
  because default value depends on USAGE property.
  Signed-off-by : Dmitrii Ovchinnikov <ovchinnikov.dmitrii@gmail.com>
  

  • [DH] libavcodec/amfenc_av1.c

• ffmpeg : Failed to call av_register_all

  19 décembre 2013, par oferbar

  I've got an Windows 7 application that is using ffmpeg to decode video frames.

  It is using an older version of ffmpeg (not sure exactly which one) but it is working ok, except some decoding errors when calling avcodec_decode_video2 from increasing number of threads.

  So I decided to upgrade the ffmpeg to a newer build and got 2.1.1 (latest).
  I got it off http://ffmpeg.zeranoe.com/builds/

  I managed to compile the application using the new include/libs.

  However, when I run the application it throws an exception that a function was not found during dll loading.
  I traced that to av_register_all() which is inside avformat.lib and avformat-55.dll.

  It looks like the definition of this function in tha ffmpeg library was changed over the versions. It no longer points to avformat-55.dll (none that I was able to find using dumpbin).

  So what is the best way to call this function from a C++ dll ?

  Currently, in my include file I have this :

  extern "C" 
  
  {
  
  #include "libavutil\dict.h"
  
  #include "libavcodec\avcodec.h"
  
  #include "libavformat\avformat.h"
  
  
  
  };
  
  
  
  #pragma comment(lib,"avcodec.lib")
  
  #pragma comment(lib,"avformat.lib")
  
  #pragma comment(lib,"avutil.lib")

  Many thanks !

  Ofer