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• subprocess Task fail after 8min when run inside Flask or BaseHTTPServer

  6 août 2015, par jthemovie

  I’m doing live HLS encoding with ffmpeg, and i usually run it via a python program as follow (i made some shortcuts...) :

  import subprocess
  
  
  
  def main():
  
      subprocess.Popen("ffmpeg -i .... (live hls encoding)", shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
  
  if __name__ == '__main__':
  
     main()

  And everything works like a charm, but when i use Flask or BaseHTTPServer, the very same weird behaviour occurs.

  After around 8min (more or less few seconds), the program stop responding and the encoding stop.

  import subprocess
  
  from flask import Flask, url_for, request, json, Response
  
  
  
  @app.route('/api/v2/livetv', methods = ['POST'])
  
  def api_live():
  
      subprocess.Popen("ffmpeg -i .... (live hls encoding)", shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
  
      return "-"
  
  
  
  if __name__ == '__main__':
  
     app.run(host='127.0.0.1', port=5001,debug=True)

  I tried using BaseHTTPServer, the very same behaviour occurs, it usually stop encoding after the segment number 46, or 47, which correspond at those 8 min.

  I have no idea why this behavior occurs. For example, the first script, once terminated, the ffmpeg will continue in background, while if i terminate the script with the web server, the ffmpeg program will exit as well.

  So if anyone could help me out with that, i would be more than glad.

  Thanks a lot for your help.

  Regards

  ps : if interested , my ffmpeg line look like this :

  /usr/bin/ffmpeg -user-agent "A User Agent" -headers "X-Forwarded-For:x.x.x.x"$’\r\n’ -re -i "http://..../index_2000_av-p.m3u8" -c:v libx264 -profile:v baseline -preset medium -x264opts level=41 -b:v 500k -s 600x340 -g 90 -bf 2 -c:a copy -f hls -hls_list_size 20 -hls_time 10 -hls_flags delete_segments -hls_segment_filename /var/www/livestream/"segment%03d.ts" /var/www/livestream/playlist.m3u8

• Compiling x264 on a Mac : "No working C compiler found" and "arm-linux-androideabi-gcc : command not found"

  29 novembre 2014, par Xavi Gil

  I am trying to compile the x264 library for Android, following this post.

  I have cloned the x264 project git clone git://git.videolan.org/x264.git and tried to compile with the following configuration :

  NDK=~/development/android-ndk-r10c    
  
  TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64
  
  PLATFORM=$NDK/platforms/android-21/arch-arm
  
  
  
  ./configure \
  
  --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  
  --sysroot=$PLATFORM \
  
  --host=arm-linux \
  
  --enable-pic \
  
  --enable-static \
  
  --disable-cli

  The problem is that I get a No working C compiler found. error.

  The conftest.log output :

  $ cat conftest.log 
  
  ./configure: line 153: arm-linux-androideabi-gcc: command not found

  But the arm-linux-androideabi-gcc is the toolchain’s bin folder !!

  Looking at this other question it looks like for some reason, even though the file exists, since it is a 64bit Mac, it won’t execute the arm-linux-androideabi-gcc file and will return this weird error and log.

  ---

  I am in a Mac OS X 10.10 and I have installed the XCode Command Line Tools :

  $ xcode-select -p
  
  /Applications/Xcode.app/Contents/Developer

  GCC version :

  $ gcc --version
  
  Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
  
  Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)
  
  Target: x86_64-apple-darwin14.0.0
  
  Thread model: posix

  ---

  Can anyone tell me how to fix this please ?

• Compiling x264 on a Mac : "No working C compiler found" and "arm-linux-androideabi-gcc : command not found"

  29 novembre 2014, par Xavi Gil

  I am trying to compile the x264 library for Android, following this post.

  I have cloned the x264 project git clone git://git.videolan.org/x264.git and tried to compile with the following configuration :

  NDK=~/development/android-ndk-r10c    
  
  TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64
  
  PLATFORM=$NDK/platforms/android-21/arch-arm
  
  
  
  ./configure \
  
  --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  
  --sysroot=$PLATFORM \
  
  --host=arm-linux \
  
  --enable-pic \
  
  --enable-static \
  
  --disable-cli

  The problem is that I get a No working C compiler found. error.

  The conftest.log output :

  $ cat conftest.log 
  
  ./configure: line 153: arm-linux-androideabi-gcc: command not found

  But the arm-linux-androideabi-gcc is the toolchain’s bin folder !!

  Looking at this other question it looks like for some reason, even though the file exists, since it is a 64bit Mac, it won’t execute the arm-linux-androideabi-gcc file and will return this weird error and log.

  ---

  I am in a Mac OS X 10.10 and I have installed the XCode Command Line Tools :

  $ xcode-select -p
  
  /Applications/Xcode.app/Contents/Developer

  GCC version :

  $ gcc --version
  
  Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
  
  Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)
  
  Target: x86_64-apple-darwin14.0.0
  
  Thread model: posix

  ---

  Can anyone tell me how to fix this please ?