oldfashiond

Make gifs from any video format ffmpeg can handle using two-pass encoding.

Essentially a convenience wrapper around the following calls,

ffmpeg -i $input -vf "$filters,palettegen" -y $palette
ffmpeg -i $input -i $palette -lavfi "$filters [x]; [x][1:v] paletteuse" -y $output

with support for common arguments. Run with -h for details.

Filter sequence

oldfashiond runs three filter stages in the following order 1. user-defined filters: an arbitrary ffmpeg filtergraph passed with --filters 2. scaling: to the width passed with --width Skipped (replaced with the identify filter) if the value is non-positive. 3. subtitles: as appropriate for any subtitle options passed

1 and 3 are the identity filter (copy) if the corresponding options are not present.

Name

Gifs are an old-fashioned format and go on tumblr, an old-fashioned website; and Old fashioned, the cocktail, is served in a tumbler.

Dependencies:

• Python 3
• ffmpeg with support for the palettegen and paletteuse filters (>= 2.6)

Optional dependencies

• humanfriendly: for some nicer log messages
• an ffmpeg compiled with --enable-libass: to hardsub gifs
• ass or srt: to automatically determine start and stop times from an ASS or SRT subtitle file, respectively