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• Compile vlc-android on macos Sierra, many errors

  12 février 2017, par appworks

  This is the error message capture,Under MAC mini(macOS Sierra 10.12.3) :

  
  I’m trying to compile VLC-android player using MAC mini, the error message is below :

  {standard input}: Assembler messages:
  
  {standard input}:146: Error: unknown register alias 'GP'
  
  clang38: error: assembler command failed with exit code 1 (use -v to see invocation)
  
  make[1]: *** [libavcodec/arm/ac3dsp_armv6.o] Error 1
  
  make[1]: *** Waiting for unfinished jobs....
  
  {standard input}: Assembler messages:
  
  {standard input}:446: Error: unknown register alias 'POUT'
  
  {standard input}:448: Error: unknown register alias 'PIN'
  
  {standard input}:450: Error: unknown register alias 'PCOEF'
  
  {standard input}:452: Error: unknown register alias 'OLDFPSCR'

  What am I doing wrong ?

• Sending video stream from NodeJS to python in real time [closed]

  17 juin 2021, par Tristan Delort

  I'm using a NodeJS server to catch a video stream through a WebRTC PeerConnection and I need to send it to a python script.

  


  I use NodeJS mainly because it's easy to use WebRTC in it and the package 'wrtc' supports RTCVideoSink and python's aiortc doesn't.

  


  I was thinking of using a named pipe with ffmpeg to stream the video stream but 3 questions arose :

  


  


  • Should I use python instead of NodeJS and completely avoid the stream through a named pipe part ? (This means there is a way to extract individual frames from a MediaStreamTrack in python)

    


  


  • If I stick with the "NodeJS - Python" approach, how do I send the stream from one script to the other ? Named pipe ? Unix domain sockets ? And with FFMpeg ?

    


  


  • Finally, for performance purpose I think that sending a stream and not each individual frames is better and simpler but is this true ?

    


  


  


  Thanks all !

  


• ffmpeg shell script globbing

  10 novembre 2015, par AD0AE

  I have a pretty straight forward question. I have a bunch of individual directories that are labeled as ./001 ./002 ... ./201
  within each directory contains files that have the identifier *_IO.PNG

  I can use the shell command : ffmpeg -framerate 20 -pattern_type glob -i './066/*IO.PNG' -c:v libx264 -pix_fmt yuv420p 066.mp4 and this works great. It does exactly what I want.

  However, I tried to write a shell script, which is below but this does not work. It seems to be loading individual files instead of all of them at once. Any help would be appreciated.

   #!/bin/bash
  
   for i in {1..5}
  
   do
  
     FILE=$(printf %03d $i)
  
     echo " This file: $FILE"
  
     infile='./$FILE/*IO.PNG'
  
     echo $infile
  
     ffmpeg -framerate 20 -pattern_type glob -i $infile -c:v libx264 -pix_fmt yuv420p './$FILE.mp4'
  
   done