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• Launch a new window when a process is over. PyQt

  15 mai 2017, par salvaestudio

  I’m doing my first video encoding program.
  My problem is that I can not get a popup window out when the process of button 3 is finished (when ffmpeg is over)
  I use a main window that works fine. I have another window ready : "winok" but I can not get it out.
  I also do not know how to verify the return value of button 3 (which will be what ffmpeg does) and display error or success message.

  import sys
  
  from PyQt4.QtCore import *
  
  from PyQt4.QtGui import *
  
  import subprocess
  
  import shlex
  
  
  
  
  
  fileinput = ''
  
  fileoutput = ''
  
  
  
  
  
  comando = '\
  
  ffmpeg \
  
  -f lavfi \
  
  -i color=c=black:s=1920x1080:r=25:d=1 \
  
  -f lavfi \
  
  -i "aevalsrc=0:c=stereo:d=1" \
  
  -i {} -filter_complex \
  
  "[0:v] trim=start_frame=1:end_frame=3 [blackstart]; \
  
  [0:v] trim=start_frame=1:end_frame=5 [blackend]; \
  
  [1:a] atrim=duration=0.12 [audiostart]; \
  
  [1:a] atrim=duration=0.2 [audioend]; \
  
  [blackstart] [audiostart] [2:v] [2:a] [blackend] [audioend] concat=n=3:v=1:a=1[v][a]" \
  
  -map "[v]" \
  
  -map "[a]" \
  
  -c:v qtrle \
  
  -c:a pcm_s24le \
  
  -ar 48000 \
  
  -timecode 00:02:00:00 {}'
  
  
  
  
  
  def window():
  
  
  
     win = QDialog()
  
  
  
     b1 = QPushButton(win)
  
     b1.setText("Select file")
  
     b1.move(50,20)
  
     b1.clicked.connect(b1_clicked)
  
  
  
     b2 = QPushButton(win)
  
     b2.setText("Output file")
  
     b2.move(50,50)
  
     b2.clicked.connect(b2_clicked)
  
  
  
     b3 = QPushButton(win)
  
     b3.setText("Encode!")
  
     b3.move(50,80)
  
     b3.clicked.connect(b3_clicked)
  
  
  
     win.setGeometry(100,100,200,200)
  
     win.setWindowTitle("Encoder")
  
     win.show()
  
     sys.exit(app.exec_())
  
  
  
  def b1_clicked():
  
     global fileinput
  
     fileinput = QFileDialog.getOpenFileName(None, "Selecciona archivo a convertir", "/home/salva", "video files (*.avi *.mkv *.mp4 *.mov *.mpg);; All files (*)")
  
     print (fileinput)
  
  
  
  
  
  def b2_clicked():
  
     global fileoutput
  
     fileoutput = QFileDialog.getSaveFileName(None, "Archivo de salida", "/home/salva", "video files (*.avi *.mkv *.mp4 *.mov *.mpg);; All files (*)")
  
     print (fileoutput)
  
  
  
  
  
  def b3_clicked():
  
     global comando
  
     subprocess.call(shlex.split(comando.format(fileinput, fileoutput + '.mov')))
  
     exit()
  
  
  
  def winok():
  
  
  
      win = QDialog()
  
  
  
      b10 = QPushButton(win)
  
      b10.setText("Do another job?")
  
      b10.move(50,20)
  
      b10.clicked.connect(b10_clicked)
  
  
  
      b11 = QPushButton(win)
  
      b11.setText("Exit")
  
      b11.move(50,50)
  
      b11.clicked.connect(b11_clicked)
  
  
  
      win.setGeometry(100,100,300,100)
  
      win.setWindowTitle("Work completed. Oh Yeah!")
  
      win.show()
  
      sys.exit(app.exec_())
  
  
  
  def b10_clicked():
  
      print ('Volviendo a codificar...')
  
  
  
  def b11_clicked():
  
      exit()
  
  
  
  if __name__ == '__main__':
  
      app = QApplication(sys.argv)
  
      window()

• avcodec/dcaenc : Do not abort process in case of bitrate deficit

  11 mai 2017, par Daniil Cherednik

  avcodec/dcaenc : Do not abort process in case of bitrate deficit
  Old behaviour - abort if at least one subband has 1bit quantizer
  
  and consumed_bits still greater than frame_bits size. It was
  
  a bit strange - we still could reduce bits consumption by reducing
  
  SNR for other subbands. Same strange logic with upper threshold -
  
  stop bits allocation if at least one subband reach 26bits.
  New behaviour - if consumed_bits greater than frame_bits and all
  
  subbands has 1 bit quantizer we restart bits allocation and allow
  
  zero subbands.
  

  • [DH] libavcodec/dcaenc.c

• ffmpeg transcoding process stops after 15min

  18 mai 2017, par p3tter

  im starting 2 ffmpeg transcoding processes on a raspberry pi (raspbian) when booting. After around 15 min, both processes stops. I have tried with delay etc. in startup script, also start it with both root and normal user privileges. Same result every time. (tried with rc.local and a own startup script in /init.d/)

  my ffmpeg parameters are :

  ffmpeg -d -re -i http://lyd.nrk.no/nrk_radio_mp3_mp3_m -ac 1 -acodec g722 -f rtp -ab 64k -ar 16k rtp://10.5.98.150:61122 > /dev/null 2>&1 < /dev/null  &
  
  sleep 15
  
  ffmpeg -d -re -i http://lyd.nrk.no/nrk_radio_mp3_mp3_h -ac 1 -acodec g722 -f rtp -ab 64k -ar 16k rtp://10.5.98.150:61124 > /dev/null 2>&1 < /dev/null &

  If i start it manually after boot the ffmpeg processes works, and wont stop. Its only when i try to start it during boot it stops. (I have also tried with crontab, same result)

  anyone have some ideas ?

  Thanks,