Recherche avancée

Sur d’autres sites (6356)

• ffmpeg record audio from Xvfb on Centos

  25 mai 2017, par boygiandi

  I’m trying to record audio from Xvfb. And I have some problems :

  1. What’s the different between alsa and pulse. I get confuse
  2. Server Centos have no soud card :

  arecord -l

  arecord : device_list:268 : no soundcards found...

  3. I may have many Xvfb process, how to record video and audio from specific Xvfb process. I checked this https://trac.ffmpeg.org/wiki/Capture/ALSA#Recordaudiofromanapplication but still don’t understand how it works.

  ffmpeg -f alsa -ac 2 -i hw:0,0 -acodec pcm_s16le output.wav

  I seen many command like this, but I don’t know how to get hw:0,0 ( id of sound card ? )

  Please help. Thanks

• Revision bd9cd9a185 : fix superframe index marker masks The superframe index marker byte carries data

  13 mars 2013, par John Koleszar

  Changed Paths : Modify /test/superframe_test.cc Modify /vp9/vp9_dx_iface.c fix superframe index marker masks The superframe index marker byte carries data in the lower 5 bits. Only the upper 3 should be used as part of the mask to detect it. By masking with 0xf0, the previous code was incorrect (...)

• PyInstaller —noconsole still shows the console after running the app

  23 septembre 2020, par Kiren78

  I've built an app to download and play sound everytime someone inserts or removes USB drive from PC.
  
Code :

  


  from playsound import playsound
from win10toast import ToastNotifier
from time import sleep
from typing import Callable
import threading
import os
import youtube_dl
import win32file


def play_audio():
    try:
        path = os.getcwd() + "\\audio.mp3"
        ydl_opts = {
            'format': 'bestaudio/best',
            'postprocessors': [{
                'key': 'FFmpegExtractAudio',
                'preferredcodec': 'mp3',
                'preferredquality': '192',
            }],
            'outtmpl': path
        }

        with youtube_dl.YoutubeDL(ydl_opts) as ydl:
            ydl.download(['https://www.youtube.com/watch?v=_0HTwQjMr9k'])

        playsound(path)
    except Exception as e:
        toast = ToastNotifier()
        toast.show_toast("RIP prank failed byq", "no ogolnie prank failed rip co jest?", duration=20)


def get_drives():
    drive_list = []
    drivebits = win32file.GetLogicalDrives()
    for d in range(1, 26):
        mask = 1 << d
        if drivebits & mask:
            drname = '%c:\\' % chr(ord('A') + d)
            t = win32file.GetDriveType(drname)
            if t == win32file.DRIVE_REMOVABLE:
                drive_list.append(drname)
    return drive_list


def watch_drives(on_change: Callable[[dict], None] = print, poll_interval: int = 1):
    def _watcher():
        global prev
        while True:
            drives = get_drives()
            if prev != drives:
                on_change(drives)
                play_audio()
                prev = drives
            sleep(poll_interval)

    t = threading.Thread(target=_watcher)
    t.start()
    t.join()


if __name__ == '__main__':
    prev = get_drives()
    watch_drives(on_change=print)


  


  I don't understand it but everytime the download starts and FFmpeg starts debugging everything (using youtube-dl) a couple of console windows appear for a fraction of a second and they immediately disappear. How can I TOTALLY disable the console so that even FFmpeg can't open it ?

  


  EDIT : Yes, I've already tried using --windowed and -w parameters in PyInstaller