{"id":2340,"date":"2013-01-21T21:05:04","date_gmt":"2013-01-22T05:05:04","guid":{"rendered":"http:\/\/owenmundy.com\/blog\/?p=2340"},"modified":"2015-07-08T12:46:22","modified_gmt":"2015-07-08T20:46:22","slug":"use-processing-and-ffmpeg-to-export-hd-video","status":"publish","type":"post","link":"https:\/\/owenmundy.com\/blog\/2013\/01\/use-processing-and-ffmpeg-to-export-hd-video\/","title":{"rendered":"Use Processing and FFmpeg to export HD video"},"content":{"rendered":"

\"p_000919\"<\/a><\/p>\n

I\u2019ve been trying to find a dependable method for exporting HD video from Processing sketches that contain dynamic data and movement as well as complex 3-dimensional shapes rendered using OpenGL. QuickTime\u2019s screen recording option hogs memory and causes frames to skip, as does does ScreenFlow, my usual go-to for screen recording. The best way\u00a0I have found so far is to export actual resolution PNG files using \u201csave()\u201d and create an HD video using FFmpeg<\/a>.<\/p>\n

FFmpeg is a very fast video and audio converter that can also grab from a live audio\/video sources or create and compress video from multiple still images. It is used from the command line and gives one control of bitrates, codecs, formats, resolution, quality, metadata, and many more options for working with video.<\/p>\n

To install FFmpeg with Macports
\nsudo port install ffmpeg<\/code><\/p>\n

# view help
\nffmpeg -h<\/code><\/p>\n

# list encoders
\nffmpeg -encoders<\/code><\/p>\n

# list codecs
\nffmpeg -codecs<\/code><\/p>\n

# use format
\nffmpeg [global_options] {[input_options] -i \u2018input_file\u2019} ... {[output_options] \u2018output_file\u2019} ...<\/code><\/p>\n

# make a movie from matching .png files, write over original, codec = libx264 (H.264), framerate = 30, 1 pass, resolution = 1920×1080, video bitrate = 6Mbits, format = mp4
\nffmpeg -y -pattern_type glob -i 'p_*.png' -vcodec libx264 -r 30 -q 100 -pass 1 -s 1920x1080 -vb 6M -threads 0 -f mp4 file.mp4<\/code><\/p>\n

# convert the video file to Apple ProRes codec for use in Final Cut
\nffmpeg -y -i file.mp4 -vcodec prores -vb 6M -r 30 -s 1920x1080 -f mov file.mov<\/code><\/p>\n

# here’s another example conversion command. this one has a much higher bitrate
\nffmpeg -y -i file_01.mp4 -b:v 40M -vcodec libx264 -pass 1 file_02.mp4<\/code><\/p>\n

For example, using this Processing sketch<\/a>, you generate the PNG files, and then run the code above on the command line to make this file:<\/p>\n