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import os, sys, vlc, pygame
from time import sleep
from pygame.locals import *
wx=100
wy=100
wb=708
wh=454
os.environ["SDL_VIDEO_WINDOW_POS"] ="%d,%d" % (wx,wy)
pygame.init()
screen = pygame.display.set_mode((wb,wh),pygame.NOFRAME)

vlcInstance = vlc.Instance()
media = vlcInstance.media_new('rtmp://127.0.0.1/live/atv')
player = vlcInstance.media_player_new()
win_id = pygame.display.get_wm_info()['window']

player.set_hwnd(win_id)
player.set_media(media)

pygame.mixer.quit()

run=1

player.play()

while run==1:
         for event in pygame.event.get():
            if event.type==KEYDOWN:
                player.stop()
                pygame.quit()
                run=0
        sleep(0.5)
        print(player.video_get_size())

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vlc.Instance('--live-caching 32000')

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╰─$ vlc --longhelp --advanced -H | grep cach
VLC media player 2.2.1 Terry Pratchett (Weatherwax) (revision 2.2.1-0-ga425c42)
      --sout-rtp-caching <integer [-2147483648 .. 2147483647]> 
          Default caching value for outbound RTP streams. This value should be
          high values, you will need to raise caching values.
          caching at input.
          how Windows Media Player will cache streamed content. Set to
      --sout-udp-caching <integer [-2147483648 .. 2147483647]> 
          Default caching value for outbound UDP streams. This value should be
      --sout-livehttp-caching, --no-sout-livehttp-caching 
                                 Allow cache (default disabled)
      --file-caching <integer [0 .. 60000]> 
                                 File caching (ms)
      --live-caching <integer [0 .. 60000]> 
                                 Live capture caching (ms)
      --disc-caching <integer [0 .. 60000]> 
                                 Disc caching (ms)
      --network-caching <integer [0 .. 60000]> 
                                 Network caching (ms)
      --sout-mux-caching <integer [-2147483648 .. 2147483647]> 
                                 Stream output muxer caching (ms)
          This allow you to configure the initial caching amount for stream