Sur d’autres sites (17046)

• Build failed in step 'Retrieving needed toolchain components' tarballs

  1er mars 2018, par VaFancy

  I tried to build crosstool in my raspberry pi, and the procedure I followed was from How to compile FFmpeg for Raspberry Pi (Raspbian). When I finished ct-ng build(which took a very long time), an error occurred. It shows that Build failed in step 'Retrieving needed toolchain components' tarballs called in step '{top-level}'

  Here is the error I copied from build.log.

  [ERROR]  
  
  [ERROR]  >>
  
  [ERROR]  >>  Build failed in step 'Retrieving needed toolchain components' tarballs'
  
  [ERROR]  >>        called in step '(top-level)'
  
  [ERROR]  >>
  
  [ERROR]  >>  Error happened in: do_kernel_get[scripts/build/kernel/linux.sh@735]
  
  [ERROR]  >>        called from: main[scripts/crosstool-NG.sh@576]
  
  [ERROR]  >>
  
  [ERROR]  >>  For more info on this error, look at the file: 'build.log'
  
  [ERROR]  >>  There is a list of known issues, some with workarounds, in:
  
  [ERROR]  >>      '/opt/cross/share/doc/crosstool-ng/ct-ng.1.19.0/B - Known issues.txt'
  
  [ERROR] 

  How can I solve this ? Please help me, I’ve already wasted 2 days on it.

• How do I limit resources for ffmpeg, called from a python-script, running in a docker container ?

  26 juillet 2019, par wotanii

  I deployed a service, that periodically does video encoding on my server ; And every time it does, all other services slow down significantly. The encoding is hidden under multiple layers of abstraction. Limiting any of those layers would be fine. (e.g. limiting the docker-container would work just as well as limiting the ffmpeg-sub process.)

  My Stack :

  1. VPS (ubuntu:zesty)
  2. docker-compose
  3. docker-container (ubuntu:zesty)
  4. python
  5. ffmpeg (via subprocess.check_call() in python)

  What I want to limit :

  • CPU : single core
  • RAM : max 2 GB
  • HDD : max 4 GB

  It would be possible to recompile ffmpeg if needed.

  What would be the place to put limits in this stack ?

• OSError : [Errno 13] Permission denied when running python code called extract.py

  26 avril 2017, par aisunshinehui

  ffmpeg.py :

  def resize(videoName, resizedName):
  
      if not os.path.exists(videoName):
  
        print '%s does not exist!' % videoName
  
        return False
  
      # call ffmpeg and grab its stderr output
  
      p = subprocess.Popen([ffmpeg, "-i", videoName],stderr=subprocess.PIPE)
  
      out, err = p.communicate()
  
      # search resolution info
  
      if err.find('differs from') > -1:
  
        return False
  
      reso = re.findall(r'Video.*, ([0-9]+)x([0-9]+)', err)
  
      if len(reso) < 1:
  
         return False
  
      # call ffmpeg again to resize
  
      subprocess.call([ffmpeg, '-i', videoName, '-s', '160 x 120', resizedName])
  
      return check(resizedName)
  
  
  
   # check the video file is corrupted or not
  
   def check(videoName):
  
       if not os.path.exists(videoName):
  
          return False
  
       p = subprocess.Popen([ffmpeg, "-i", videoName], stderr=subprocess.PIPE)
  
       out, err = p.communicate()
  
       if err.find('Invalid') > -1:
  
          return False
  
       return True

  extract.py :

  def extract(videoName, outputBase):
  
      if not os.path.exists(videoName):
  
          print '%s does not exist!' % videoName
  
          return False
  
      if check_dup(outputBase):
  
          print '%s processed' % videoName
  
          return True
  
      resizedName = os.path.join(tmpDir, os.path.basename(videoName))
  
      if not ffmpeg.resize(videoName, resizedName):
  
          resizedName = videoName     # resize failed, just use the input video
  
      subprocess.call('%s %s | %s %s %s %s' % (dtBin, resizedName, fvBin, pcaList, codeBookList, outputBase), shell=True)
  
      return True
  
  
  
  def check_dup(outputBase):
  
      """
  
      Check if fv of all modalities have been extracted
  
      """
  
      featTypes = ['traj', 'hog', 'hof', 'mbhx', 'mbhy']
  
      featDims = [20, 48, 54, 48, 48]
  
      for i in range(len(featTypes)):
  
          featName = '%s.%s.fv.txt' % (outputBase, featTypes[i])
  
          if not os.path.isfile(featName) or not os.path.getsize(featName) > 0:
  
              return False
  
          # check if the length of feature can be fully divided by featDims
  
          f = open(featName)
  
          featLen = len(f.readline().rstrip().split())
  
          f.close()
  
          if featLen % (featDims[i] * 512) > 0:
  
              return False
  
      return True

  i run the extract.py in the terminal and error occurred as follows,then add sudo and run chmod 777 -R /usr/lib/python2.7 to change the permission but it doesn`t work !

  aisunshinehui@aisunshinehui : /program/dtfv/script$ sudo python extract_fv.py /home/aisunshinehui/program/dtfv/script/videolist/video.txt

  /home/aisunshinehui/program/dtfv/script/output/ 1
  
  [sudo] password for aisunshinehui: 
  
      0 /home/aisunshinehui/program/dtfv/script/videolist
  
    Traceback (most recent call last):
  
        File "extract_fv.py", line 63, in <module>
  
          extract(videos[i], outputName)
  
        File "extract_fv.py", line 27, in extract
  
          if not ffmpeg.resize(videoName, resizedName):
  
        File "/home/aisunshinehui/program/dtfv/script/ffmpeg.py", line 17, in resize
  
          p = subprocess.Popen([ffmpeg, "-i", videoName], stderr=subprocess.PIPE)
  
        File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
  
          errread, errwrite)
  
        File "/usr/lib/python2.7/subprocess.py", line 1327, in _execute_child
  
          raise child_exception
  
      OSError: [Errno 13] Permission denied
  
  </module>

  help me !