Recherche avancée

Sur d’autres sites (8201)

• Python Matplotlib FuncAnimation + Saving

  6 mars 2018, par Mars

  I am new to python and I’m trying to make an animation and save it into some video format using matplotlibs FuncAnimation. If I run the following code :

  import numpy as np
  
  import matplotlib.animation as ani
  
  import matplotlib.pyplot as plt
  
  
  
  azimuths = np.radians(np.linspace(0, 360, 360))
  
  zeniths = np.arange(0, 8, 0.2)
  
  rho, psi = np.meshgrid(zeniths, azimuths)
  
  
  
  
  
  fig = plt.figure()
  
  ax = fig.add_subplot(1, 1, 1, polar=True)
  
  ax.set_yticks([])
  
  plt.grid()
  
  
  
  
  
  def frame(i):
  
      values_i = prob_density(rho ** 2, psi, i)
  
      ax.contourf(psi, rho, values_i)
  
  
  
  animation = ani.FuncAnimation(fig, frame, np.linspace(0, 1000, 10))
  
  animation.save('video.mp4', writer='ffmpeg')

  There is an error that says :

  ValueError: outfile must be *.htm or *.html

  As this seems to have something to do with the ffmpeg files - these are located in

  /anaconda3/bin/ffmpeg

  I have been on this for quite some time now but can’t seem to figure out a solution though it seems to be common issue. Thankful for any suggestions.

• Try to grab the frame using the ffpyplayer but not able to get the extact frame

  31 juillet 2022, par HARSH BHATNAGAR

  I am trying to grab the frame from mp4 file , rtsp link but it show the strange video given below the output of the ffpyplayer.
I have also tried to receive the stream from udp and tcp video link but its cannot process the frame .

  


  from ffpyplayer.player import MediaPlayer
import numpy as np
import cv2

player = MediaPlayer("mp.mp4")
val = ''
while val != 'eof':
    frame, val = player.get_frame()
    if val != 'eof' and frame is not None:
        img, t = frame
        print(img)
        w = img.get_size()[0] 
        h = img.get_size()[1]
        arr = np.uint8(np.asarray(list(img.to_bytearray()[0])).reshape(h,w,3)) # h - height of frame, w - width of frame, 3 - number of channels in frame
        print(arr)
        arr=cv2.resize(arr,(320,520))
        cv2.imshow('test1111', arr)
        if cv2.waitKey(25) & 0xFF == ord('q'):
            cv2.destroyAllWindows()
            break


  


  

  


• FFMPEG unable to find a suitable option format for 'reconnect' error

  14 août 2021, par Fayeze Salih

  import discord
from discord.ext import commands
from discord.ext.commands.core import command
import youtube_dl

class Music(commands.Cog):
    def __init__(self, client):
        self.client = client
    
    @commands.command()
    async def play(self, ctx, url):
        ctx.voice_client.stop()
        FFMPEG_OPTIONS = {'before_options': 'reconnect 1 -reconnect_streamed 1 -reconnect_delay_max 5', 'options': '-vn'}
        YDL_OPTIONS = {'format': 'bestaudio'}
        vc = ctx.voice_client

        with youtube_dl.YoutubeDL(YDL_OPTIONS) as ydl:
            info = ydl.extract_info(url, download=False)
            url2 = info['formats'][0]['url']
            source = await discord.FFmpegOpusAudio.from_probe(url2, **FFMPEG_OPTIONS)
            vc.play(source)

def setup(client):
    client.add_cog(music(client))


  


  This code for my music bot returns the error,

  


  


  [NULL @ 0000018dc5d76e40] Unable to find a suitable output format for 'reconnect'
reconnect : Invalid argument.

  


  


  Why ? I have tried making sure that I am using hyphens but that hasn't fixed the issue.