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• How can we convert pdf to images in same resolution ?

  17 juillet 2012, par Preet Sandhu

  I have two pdf of different formats, I need to convert those into video both are working with different script, I want any common script for all. any suggestion will be appreciated.

  one pdf converting with below script

  exec("convert -density 150 -quality 100 -resize 800x $pdf_path $temp_images ");
  
  exec("ffmpeg -loop 1 -f image2 -r 0.5 -b 1800 -i $temp_images_wildcard -c:v libx264 -preset slow -tune stillimage -r 5 -t 22 -y $frame_target 2>&1",$output);

  another converting working with this script

  exec("convert -geometry 1600x1600 -density 200x200 -quality 100 $pdf_path $temp_images ");
  
  exec("ffmpeg -loop 1 -f image2 -r 0.5 -b 1800 -i $temp_images_wildcard -c:v libx264 -preset slow -tune stillimage -r 5 -t 22 -y $frame_target 2>&1",$output);

  Thanks
  Preet

• ffmpeg combine audio and video different lengths

  9 novembre 2014, par xhassassin

  I have an audio and video file. The audio file is the correct length but the video file is not due to some errors in the video generation. I want to combine the two and stretch the video file so that it’s the same length as the audio file. What’s the correct way for me to do this ?

  One way I’ve found is I can stretch the video file using this : http://blog.grio.com/2012/01/fast-and-slow-motion-video-with-ffmpeg.html

  And then I can combine the audio and video file normally.

  However this is two passes. Is there any way I can do this all at once ?

• Why same command in FFMPEG takes longer in moviepy ?

  15 octobre 2020, par soroushamdg

  I'm trying to convert a .flv file to .mp4 file using moviepy, when I run follow command in FFMPEG :

  


  ffmpeg -i "movie.flv" -r 1 -preset ultrafast "output.mp4"


  


  It takes about 5 minutes. The input .flv file's fps is 1000 and it's 95 minutes clip. So using command above I'm dropping fps to 1.
But using moviepy, even simple commands, it estimated 96 hours ! and it's super slow, this is my python moviepy code :

  


  video = VideoFileClip("movie.flv")
videos[0].write_videofile('multiple_audio_videos.mp4',
                            preset="ultrafast",
                            fps=1,
                            )


  


  I even tried setting output fps using ffmpeg_params like this :

  


  video = VideoFileClip("movie.flv")
videos[0].write_videofile('multiple_audio_videos.mp4',
                                preset="ultrafast",
                                ffmpeg_params=['-r','1'],
                                )


  


  Both are super slow. What should I do to make moviepy export faster ?