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• QWindowsPipeWriter::write failed. (The handle is invalid.). PyQt5, Python, ffmpeg

  3 décembre 2019, par Go0od

  It not writing png file. I want to save central widget to png file. I have 2 files, one is main file and second one is ui file. Link has ui file

  main.py

  import sys
  
  from PyQt5.QtWidgets import QWidget
  
  from PyQt5 import QtCore, QtGui, QtWidgets
  
  from green import Ui_MainWindow
  
  class MyWindow(QtWidgets.QMainWindow, Ui_MainWindow, QWidget):
  
     def __init__(self):
  
      QtWidgets.QMainWindow.__init__(self)
  
      Ui_MainWindow.__init__(self)
  
  
  
      self.setupUi(self)
  
      self.widger_screen()
  
  
  
  def widger_screen(self):
  
  
  
      self.process = QtCore.QProcess(app)
  
      self.process.setProcessChannelMode(self.process.ForwardedChannels)
  
      self.process.setOpenMode(self.process.WriteOnly)
  
      self.process.start('ffmpeg',
  
                         ['-y',
  
                          '-analyzeduration', '1000',
  
                          '-vcodec', 'png', '-i', '-',
  
                          '-vcodec', 'mpeg4',
  
                          '-qscale', '5', '-r', '24', 'video.avi',
  
                          "-loglevel", "debug"])
  
      for i in range(100):
  
          QWidget.grab(self.centralwidget).save(self.process, "PNG")
  
  
  
  if __name__ == '__main__':
  
  app = QtWidgets.QApplication(sys.argv)
  
  window = MyWindow()
  
  window.show()
  
  sys.exit(app.exec_())

  green.ui
  https://paste.pythondiscord.com/ugorifokiq.py

• Big problems while compiling FFMPEG for iOS5

  6 octobre 2024, par Vlad Bogdan

  I'm trying to compile the ffmpeg library for iOS5. I tried different options but none works.

  



  I downloaded this : https://github.com/ciphor/ffmpeg4ios .

  



  I tried the original build_armv7 but it didn't work. I edited the build_arm7 file and now it looks like this :

  



  #!/bin/tcsh -f

if (! -d armv7) mkdir armv7
if (! -d lib) mkdir lib

rm armv7/*.a

make clean

./configure --disable-network --disable-mpegaudio-hp --disable-lpc --disable-vaapi 
--disable-vdpau --disable-hwaccels --disable-mmx --disable-mmx2 --disable-sse 
--disable-ssse3 --disable-avx --disable-amd3dnow --disable-amd3dnowext --disable-vis 
--disable-mmi --disable-doc --disable-yasm --disable-ffmpeg --disable-ffplay 
--disable-ffprobe --disable-ffserver --disable-rdft --disable-dxva2 --disable-encoders 
--disable-decoders --enable-decoder=h264 --disable-bsfs --disable-protocols 
--disable-indevs --disable-outdevs --disable-devices --disable-filters --disable-demuxers --enable-demuxer=h264 
--disable-muxers --disable-parsers --enable-parser=h264 --enable-cross-compile --arch=arm 
--target-os=darwin 
--cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 --as='gas-preprocessor/gas-preprocessor.pl /Aplications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2' 
--sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk --cpu=cortex-a8 
--extra-cflags='-pipe -Os -gdwarf-2 -issysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk -m${thumb_opt:-no-thumb} 
-mthumb-interwork' --extra-ldflags='-arch armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk' --enable-pic


make

mv libavcodec/libavcodec.a armv7/
mv libavdevice/libavdevice.a armv7/
mv libavformat/libavformat.a armv7/
mv libavutil/libavutil.a armv7/
mv libswscale/libswscale.a armv7/

rm lib/*.a

cp armv7/*.a lib/


  



  But i get this error :

  



  


  /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 is unable to create an executable file.
 C compiler test failed.

  


  



  I looked all over the Internet. I have read all the posts on stackoverflow about this but none helped me. Please tell me what i'm doing wrong and please don't post me links : trust me, i saw them all !

  


• Big problems while compiling FFMPEG for iOS5

  7 juin 2013, par Vlad Bogdan

  I'm trying to compile the ffmpeg library for iOS5. I tried different options but none works.

  I downloaded this : https://github.com/ciphor/ffmpeg4ios .

  I tried the original build_armv7 but it didn't work. I edited the build_arm7 file and now it looks like this :

  #!/bin/tcsh -f
  
  
  
  if (! -d armv7) mkdir armv7
  
  if (! -d lib) mkdir lib
  
  
  
  rm armv7/*.a
  
  
  
  make clean
  
  
  
  ./configure --disable-network --disable-mpegaudio-hp --disable-lpc --disable-vaapi 
  
  --disable-vdpau --disable-hwaccels --disable-mmx --disable-mmx2 --disable-sse 
  
  --disable-ssse3 --disable-avx --disable-amd3dnow --disable-amd3dnowext --disable-vis 
  
  --disable-mmi --disable-doc --disable-yasm --disable-ffmpeg --disable-ffplay 
  
  --disable-ffprobe --disable-ffserver --disable-rdft --disable-dxva2 --disable-encoders 
  
  --disable-decoders --enable-decoder=h264 --disable-bsfs --disable-protocols 
  
  --disable-indevs --disable-outdevs --disable-devices --disable-filters --disable-demuxers --enable-demuxer=h264 
  
  --disable-muxers --disable-parsers --enable-parser=h264 --enable-cross-compile --arch=arm 
  
  --target-os=darwin 
  
  --cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 --as='gas-preprocessor/gas-preprocessor.pl /Aplications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2' 
  
  --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk --cpu=cortex-a8 
  
  --extra-cflags='-pipe -Os -gdwarf-2 -issysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk -m${thumb_opt:-no-thumb} 
  
  -mthumb-interwork' --extra-ldflags='-arch armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk' --enable-pic
  
  
  
  
  
  make
  
  
  
  mv libavcodec/libavcodec.a armv7/
  
  mv libavdevice/libavdevice.a armv7/
  
  mv libavformat/libavformat.a armv7/
  
  mv libavutil/libavutil.a armv7/
  
  mv libswscale/libswscale.a armv7/
  
  
  
  rm lib/*.a
  
  
  
  cp armv7/*.a lib/

  But i get this error :

  /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2 is unable to create an executable file.
  C compiler test failed.

  I looked all over the Internet. I have read all the posts on stackoverflow about this but none helped me. Please tell me what i'm doing wrong and please don't post me links : trust me, i saw them all !