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• FFMPEG BlockingIOError : [Errno 11] Resource temporarily unavailable

  18 septembre 2021, par mugetsu

  I have a multiprocess pool calling different instances of ffmpeg and outputing a video file. Some of these videos are hundreds of megabytes and take a while to create. I'm seemingly getting IO bottlenecked :

  


    File "", line 2, in write_videofile
  File "/home/xxx/.local/lib/python3.7/site-packages/moviepy/decorators.py", line 135, in use_clip_fps_by_default
    return f(clip, *new_a, **new_kw)
  File "", line 2, in write_videofile
  File "/home/xxx/.local/lib/python3.7/site-packages/moviepy/decorators.py", line 22, in convert_masks_to_RGB
    return f(clip, *a, **k)
  File "/home/xxx/.local/lib/python3.7/site-packages/moviepy/video/VideoClip.py", line 307, in write_videofile
    logger=logger)
  File "/home/xxx/.local/lib/python3.7/site-packages/moviepy/video/io/ffmpeg_writer.py", line 216, in ffmpeg_write_video
    ffmpeg_params=ffmpeg_params) as writer:
  File "/home/xxx/.local/lib/python3.7/site-packages/moviepy/video/io/ffmpeg_writer.py", line 129, in __init__
    self.proc = sp.Popen(cmd, **popen_params)
  File "/usr/lib64/python3.7/subprocess.py", line 800, in __init__
    restore_signals, start_new_session)
  File "/usr/lib64/python3.7/subprocess.py", line 1482, in _execute_child
    restore_signals, start_new_session, preexec_fn)
BlockingIOError: [Errno 11] Resource temporarily unavailable
"""


  


  This is weird but iotop never shows me with more than 10% io. My CPU is doing fine too, I have plenty of idle cores when this is running.

  


  The error here shows that its happening on ffmpeg_write, so clearly an IO constraint.

  


  Is there a way to make the write call threaded(I assume that's the fix) ? Is that ok even though this is happening in a multiprocess pool ?

  


• FFMPEG on cygwin failed to compile libx264 error : unknown type name ‘HMODULE’

  6 mai 2020, par Ivan Lee

  I am trying to compile libx264 in ffmpeg under cygwin environment.

  



  I have followed some directions from several sources from Koohiimaster's blog, FFMPEG compilation guide, SO post 1, SO post 2 but I always stuck at the same step which is the libx264 compilation (make) process.

  



  As mentioned in the FFMPEG compilation guide these steps should be followed in order to make libx264 works

  



  cd ~/ffmpeg_sources
wget http://download.videolan.org/pub/x264/snapshots/last_x264.tar.bz2
tar xjvf last_x264.tar.bz2
cd x264-snapshot*
PATH="$HOME/bin:$PATH" ./configure --prefix="$HOME/ffmpeg_build" bindir="$HOME/bin" --enable-static --disable-opencl
PATH="$HOME/bin:$PATH" make
make install


  



  but when i enter this command PATH="$HOME/bin:$PATH" make the compiler always stop with the following errors :

  



  In file included from input/avs.c:49:0:
./extras/avisynth_c.h:825:3: error: unknown type name ‘HMODULE’
HMODULE handle;
^


  



  I was wondering whether this is libx264 source's bug, but after I tried several earlier source version, it produce the same error. Any thoughts to solve this problem ?

  


• FFMPEG on cygwin failed to compile libx264 error : unknown type name ‘HMODULE’

  6 mai 2020, par Ivan Lee

  I am trying to compile libx264 in ffmpeg under cygwin environment.

  



  I have followed some directions from several sources from Koohiimaster's blog, FFMPEG compilation guide, SO post 1, SO post 2 but I always stuck at the same step which is the libx264 compilation (make) process.

  



  As mentioned in the FFMPEG compilation guide these steps should be followed in order to make libx264 works

  



  cd ~/ffmpeg_sources
wget http://download.videolan.org/pub/x264/snapshots/last_x264.tar.bz2
tar xjvf last_x264.tar.bz2
cd x264-snapshot*
PATH="$HOME/bin:$PATH" ./configure --prefix="$HOME/ffmpeg_build" bindir="$HOME/bin" --enable-static --disable-opencl
PATH="$HOME/bin:$PATH" make
make install


  



  but when i enter this command PATH="$HOME/bin:$PATH" make the compiler always stop with the following errors :

  



  In file included from input/avs.c:49:0:
./extras/avisynth_c.h:825:3: error: unknown type name ‘HMODULE’
HMODULE handle;
^


  



  I was wondering whether this is libx264 source's bug, but after I tried several earlier source version, it produce the same error. Any thoughts to solve this problem ?