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• Running cmd in python (ffmpeg)

  13 avril 2019, par Coolcrab

  Atm I have this as my code, the first line seems to work well but the 2nd gives errrors.

  os.chdir('C://Users/Alex/Dropbox/code stuff/test')
  
  subprocess.call(['ffmpeg', '-i', 'test%d0.png', 'output.avi'])

  error :

  Traceback (most recent call last):
  
    File "C:\Users\Alex\Dropbox\code stuff\solarsystem.py", line 56, in <module>
  
      subprocess.call(['ffmpeg', '-i', 'test%d0.png', 'output.avi'])
  
    File "C:\Python27\lib\subprocess.py", line 524, in call
  
      return Popen(*popenargs, **kwargs).wait()
  
    File "C:\Python27\lib\subprocess.py", line 711, in __init__
  
      errread, errwrite)
  
    File "C:\Python27\lib\subprocess.py", line 948, in _execute_child
  
      startupinfo)
  
  WindowsError: [Error 2] The system cannot find the file specified
  
  </module>

• MLT Framework. Insert zoomin text on video

  10 mars 2017, par user2455079

  Need to achieve effect something like that : put zoomingIn text on video background (black with some animation) between other videos.
  Demo : https://www.dropbox.com/s/ehqwkjgu5u5e9rp/4%20Cultivar%20Road%20Brampton%2C%20Jessi%20Sandhu.mp4?dl=0

  Trying to make is using dynamictext and affine filter :

  "1.mp4" -mix 7 -mixer luma "2.mp4" -mix 7 -mixer luma "bg.mp4" -attach-clip dynamictext in=0 out=145 "text.txt" -attach-clip affine in=0 out=145 -attach-clip affine valign=middle halign=center scale=1 fill=1 geometry="0=10%,10%:80%x80%:0%;36=0,0:100%x100%:100%;109=-10%,-10%:120%x120%:100%;145=-10%,-10%:120%x120%:0%"

  But i have unexpected results with infinite video and no animation at all...

• Conversion to HEVC using FFmpeg produces video s incompatible with Keynote, but Handbrake works

  15 mai 2019, par Gabriel

  I have a video
  ( https://www.dropbox.com/s/01rg7rgarqfruy3/Spore%20-%20Assymetrical%20Creatures%2C%20excerpt.mov?dl=0 )
  that I want to convert to HEVC (H265).

  When I convert it using Handbrake, it produces an output video that I can then include in a presentation in Keynote.

  When I convert it using ffmpeg on the command line myself, then the output cannot be included in a Keynote presentation ;
  the error message I get is "Operation could not be completed".
  The ffmpeg version plays fine in Quicktime Player, though.
  I have already googled, but could not find a solution to the mystery.
  Also, I have already looked at Handbrake’s Activity Log, but could not find a substantial difference .
  I have already tried to change some of the options and parameters I usually use for running ffmpeg, to no avail.

  Question is : how do I have to run ffmpeg, which options should I use, so that the output can always be included in Keynote ?

  Note that some ffmpeg output videos can be inserted in Keynote.
  I know that I could, of course, always use Handbrake to manually convert the videos, but I’d rather use ffmpeg on the command line so that I can convert lots of my videos in batch.

  Steps to reproduce the problem :

  Convert this video
  https://www.dropbox.com/s/01rg7rgarqfruy3/Spore%20-%20Assymetrical%20Creatures%2C%20excerpt.mov?dl=0
  using Handbrake using the H265 codec.

  Convert it also using ffmpeg. My command line is :
  /opt/local/bin/ffmpeg -loglevel level+info -hide_banner -nostats -nostdin -i "Spore - Assymetrical Creatures, excerpt copy.mov" -map 0 -map -0:v:1 -c:s copy -map_metadata 0 -map_metadata:s:v 0:s:v -dn -map_metadata:s:a 0:s:a -c:a aac -b:a 128k -filter:v crop=in_w-mod(in_w\,2):in_h-mod(in_h\,2) -codec:v hevc -tag:v hvc1 -max_muxing_queue_size 1024 -preset faster -crf 25 -x265-params me=umh:subme=5:ref=4:aq-mode=2:aq-strength=1.0:psy-rd=2.0:psy-rdoq=1.0:rd=6:profile=main:log-level=2 -ignore_unknown -f mp4 "Spore - Assymetrical Creatures, excerpt copy.h265.mp4_converting"

  Go to Keynote / Insert / Choose .. , select the video (either the Handbrake or the ffmpeg version).

  My HandBrake version (e.g., 1.0.0) :
  Version 1.2.0 (2018122200)

  My ffmpeg version :

    built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
  
    configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-avresample --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-librsvg --enable-libtheora --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libsoxr --enable-libspeex --enable-libass --enable-libbluray --enable-lzma --enable-gnutls --enable-fontconfig --enable-libfreetype --enable-libfribidi --disable-libjack --disable-libopencore-amrnb --disable-libopencore-amrwb --disable-libxcb --disable-libxcb-shm --disable-libxcb-xfixes --disable-indev=jack --enable-opencl --disable-outdev=xv --enable-audiotoolbox --enable-videotoolbox --enable-sdl2 --disable-securetransport --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64 --enable-x86asm --enable-libx265 --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid --enable-version3 --enable-libsmbclient --enable-nonfree --enable-libfdk-aac
  
    libavutil      56. 22.100 / 56. 22.100
  
    libavcodec     58. 35.100 / 58. 35.100
  
    libavformat    58. 20.100 / 58. 20.100
  
    libavdevice    58.  5.100 / 58.  5.100
  
    libavfilter     7. 40.101 /  7. 40.101
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100

  Operating system and version :
  macOS 10.14.3 (Mojave)

  Handbrake log : https://www.dropbox.com/s/4zsn7b2agwwyu1x/Spore%20-%20Assymetrical%20Creatures%2C%20Excerpt%201%202019-04-29%2014-44-28.txt?dl=0

  CLI ffmpeg log : https://www.dropbox.com/s/qx2wf1h5svbrjbc/Spore%20-%20Assymetrical%20Creatures%2C%20Excerpt%201%20-%20ffmpeg%20cli.txt?dl=0

  Output from Console.app, which occurred at the point when I tried to insert the ffmpeg version of the video, filtered by "keynote" : https://www.dropbox.com/s/2oam7cp3az9kp34/Console-keynote-output.txt?dl=0

  Here are the logs of ffmpeg when I run ffmpeg -i ...
  on the video that was output by ffmpeg, and for the video output by Handbrake (as suggested by Gyan) :
  https://www.dropbox.com/s/kddpit4sbq8vdhp/log_on_ffmpeg_result.txt?dl=0
  https://www.dropbox.com/s/v8n1ihgsp4tdwvp/log_on_handbrake_result.txt?dl=0

  Any hints, suggestions , or insights will be highly appreciated.

  Best regards, Gabriel