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• ALSA lib pcm.c:7963 :(snd_pcm_recover) underrun occurred with MoviePy

  25 janvier 2017, par mdornfe1

  So I have a bit of an unusual use case for MoviePy. I have a 40 core computer, and on each core I’m creating a moviepy object, having that object connect to an mp4 file, then having each object decompress random images from the mp4 file. I’m doing this so I can use the images to train a neural network. It actually works really except I’m getting this warning

  ALSA lib pcm.c:7963:(snd_pcm_recover) underrun occurred

  I can’t figure out its source. Here is a basic code example

  from moviepy.editor import VideoFileClip
  
  from queue import Queue, deque
  
  import threading, multiprocessing
  
  import numpy as np
  
  
  
  def decompress_worker(training_data:Queue, frame_idxs:Queue, video_file_path:str):
  
      """
  
      Eache of these workers will pop off one integer from frame_idxs.
  
      It will then decompress that frame number from vs. Finally
  
      it will store the decompressed image in training_data.
  
      """
  
      vs = VideoFileClip(video_file_path)
  
      fps = vs.fps
  
  
  
      while frame_idxs.qsize() > 0:
  
          frame_number = frame_idxs.get()
  
          frame = vs.get_frame( frame_number / fps )
  
          training_data.put(frame)
  
  
  
  
  
  num_cores = multiprocessing.cpu_count()
  
  frame_idxs = Queue()
  
  training_data = Queue()
  
  frame_idxs.queue = deque(np.random.randint(0, 10000, size = 1000))
  
  
  
  decompress_threads = []
  
  for n in range(num_cores):
  
      decompress_thread = threading.Thread(target=decompress_worker, 
  
          args=(training_data, frame_idxs, video_file_path))
  
      decompress_threads.append(decompress_thread)
  
      decompress_thread.start()
  
  
  
  [thread.join() for thread in decompress_threads]

  I’m guessing it’s coming from me reading data from the mp4 file to fast ? It would be nice if I could just suppress the warning. Is there a way to do that ?

• Tunnel Streaming through server

  28 octobre 2017, par Sarathvichet Heng

  I want to be able to stream a hls IPTV streaming but the origin server has country restriction. I also have a VPS server of that country so I want to stream through that VPS.
  For example : a request to server http://vps.com/tv.php?ch=2 and then stream
  But the source behind it is the origin which is http://origin.com/tv/ch2.m3u8?token...............
  I was able to bypass token and fetch the streaming url using php but don’t know how can I mask http://origin.com/tv/ch2.m3u8...... behind http://vps.com/tv.php..........
  . I don’t want to use FFMPEG because it’ll get
  data and rebroadcast a new stream and consume high vps resource.
  and If I capture packet using Wireshark while playing this http://vps.com/tv.php?ch=2 I’ll see http://origin.com/tv/ch2.m3u8?token......... behind it.

• avcodec/mips : Improve avc avg mc 10, 30, 01 and 03 msa functions

  6 novembre 2017, par Kaustubh Raste

  avcodec/mips : Improve avc avg mc 10, 30, 01 and 03 msa functions
  Align the mask buffer to 64 bytes.
  
  Load the specific destination bytes instead of MSA load and pack.
  
  Remove unused macros and functions.
  Signed-off-by : Kaustubh Raste <kaustubh.raste@imgtec.com>
  
  Reviewed-by : Manojkumar Bhosale <Manojkumar.Bhosale@imgtec.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/mips/h264qpel_msa.c