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• Error with FFMPEG "av_interleaved_write_frame() broken pipe" While streaming in loop

  16 juin 2021, par Prateek Kalra

  Good Evening to all,

  


  Please help i am having some issue with my ffmpeg

  


      #! /bin/bash

VBR="1500k"
FPS="30"
QUAL="fast"

KEY="keyhere"


ffmpeg -re -stream_loop -1 -i /home/play/night.mp4 -deinterlace -c:v libx264 -b:v 2M -c:a copy -strict -2 -flags +global_header -bsf:a aac_adtstoasc -bufsize 2100k -f flv rtmp://a.rtmp.you$KEY


  


  My issue is that first time steam work fine to YouTube but when video enters loop it ends with error

  


  av_interleaved_write_frame(): Broken pipeB time=00:15:23.02 bitrate=1592.9kbits/s speed=0.959x
    Last message repeated 1 times
[flv @ 0x873b40] Failed to update header with correct duration.
[flv @ 0x873b40] Failed to update header with correct filesize.


  


  Please advice

  


  Thank you so Much

  


• Get frames from a video into a matrix

  19 juin 2019, par Nephilim

  I’m currently trying to implement a compression algorithm(frame prediction) for an assignment. I am not looking for thumbnail files, or even just a shell command to generate something for me. My problem is specifically integrating it with a golang program.

  I just started and I’m already stuck. I’m supposed to get each frame out of a video,divide it into I P and B frames and perform inter-coding(compress the frame itself), then perform intra-coding(between the frames).

  Right now I cannot even get started on the above problems, because I have no idea how to read the video as something I could use in code. Apparently, the only library I can think of is ffmpeg. FFMPEG can get separate frames, apparently even i p and b frames.

  ffmpeg -i <inputfile> -vf '[in]select=eq(pict_type\,B)[out]' b.frames.mp4
</inputfile>

  But this is just another video output, that I do not know how to open.
  What I was thinking of was outputting frames into bitmaps(?), then reading each bitmap separately, to reconstruct three 3D matrixes, of i frames, p frames and b frames. However this seems like quite a feat. Someone, somewhere has definitely tried to parse a video into a 3D matrix and has found a better solution than what I’m thinking of.

  To be concise, I have a video, I need a 3D matrix. The 3D matrix is a matrix of 2D matrixes, which represent a frame in the video. Each point in a 3D matrix is a pixel(or whatever the equivalent is in videos).

  

• Process Multiple Streams using ffmpeg-python

  27 novembre 2019, par C Dorman

  I have a MPEG-2 TS with a stream of video and a steam of KLV metadata. I can use ffmpeg-python to process each of these streams independently. For example, I can get the video stream, process each frames using numpy as shown in the docs. I can also get the data stream and show it in following way (using the library klvdata) :

  process = (
  
      ffmpeg
  
          .input(in_filename)
  
          .output('pipe:', format='data', codec='copy', map='data-re')
  
          .run_async(pipe_stdout=True, pipe_stderr=True)
  
  )
  
  
  
  for packet in klvdata.StreamParser(process.stdout.read()):
  
      packet.structure()
  
  
  
  process.wait()

  How do I do these at the same time ? I need to split the TS data into its streams and process them both, keeping them in sync. ffmpeg by itself can demultiplex the streams into separate files, but how do I handle the streams in python. The KLV has information that I want to show on top of the video stream (recognition boxes).