Introduction

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• use of codec 'divx' to encode an mpeg4 compliant film is not recommended by the transcode man pages anymore, you should use instead 'ffmpeg'
• this page is deprecated but kept just in case some former rgb colour-encoded stuff was still hanging around....
• to find out more about the use of a piece of software and its options check man pages or respective web-sites:
www.transcoding.org - transcode

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Transcode from rgb_dvc.mov to divx5

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• avoid RGB colour model and use YUV for better compression and increased compatibility with other multimedia players!
• 26min documentary:
  note that this film using RGB (instead of YUV - my mistake...) was first rendered by Cinelerra to mpeg2, then reloaded into Cinelerra's assets for a second compression producing rgb_dvc.mov, and only then compressed via transcode

1st mpg release: 544M lindy_by_frogs_2200Kbps_720x480mpg2
2nd compression: 2.4G lindy_by_frogs_2200Kbps_720x480mpg2_to_dvc_12fps.mov
3rd compression: 54M lindy_by_frogs_2200Kbps_720x480mpg2_to_dvc_12fps_to_divx5.avi

• fitting a 26min long documentary for internet release into 54Mb was quite a challenge a couple of years ago - it doesn't make much sense nowadays though

the command line is split for better legibility (back-slash ' \ ' means continue to next line):

transcode -i lindy_by_frogs_2200Kbps_720x480mpg2_to_dvc_12fps.mov \ 

    input file

 -o lindy_by_frogs_2200Kbps_720x480mpg2_to_dvc_12fps_to_divx5.avi \ 

    output file

 -y divx5 -w 200,16,20 --divx_vbv_prof 4 \ 

    codec, encoder bitrate,keyframes,crispness divx5 encoder profile

 -Q 5 -C 3 -k -z -r 2 \ 

    encoding quality anti-aliasing swap Cb/Cr reduce height by 2

 -F mp3 -b 96 \ 

    encoder parameter strings (here mp3) audio bitrate

 -R 3

    enable multi-pass encoding