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Merge pull request #1242 from biggsbiggsby/patch-1

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Generate a palette for each gif frame; Fixes #1239
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Daniel Schwabeneder 2017-11-20 11:01:28 +01:00 committed by GitHub
commit b2a816452d
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1 changed files with 12 additions and 5 deletions
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17
src/animation.jl
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@ -67,14 +67,21 @@ mp4(anim::Animation, fn = mp4fn(); kw...) = buildanimation(anim.dir, fn, false;
function buildanimation(animdir::AbstractString, fn::AbstractString,
is_animated_gif::Bool=true;
fps::Integer = 20, loop::Integer = 0)
fps::Integer = 20, loop::Integer = 0,
variable_palette::Bool=false)
fn = abspath(fn)
if is_animated_gif
# generate a colorpalette first so ffmpeg does not have to guess it
run(`ffmpeg -v 0 -i $(animdir)/%06d.png -vf palettegen -y palette.png`)
# then apply the palette to get better results
run(`ffmpeg -v 0 -framerate $fps -loop $loop -i $(animdir)/%06d.png -i palette.png -lavfi paletteuse -y $fn`)
if variable_palette
# generate a colorpalette for each frame for highest quality, but larger filesize
palette="palettegen=stats_mode=single[pal],[0:v][pal]paletteuse=new=1"
run(`ffmpeg -v 0 -framerate $fps -loop $loop -i $(animdir)/%06d.png -lavfi "$palette" -y $fn`)
else
# generate a colorpalette first so ffmpeg does not have to guess it
run(`ffmpeg -v 0 -i $(animdir)/%06d.png -vf "palettegen=stats_mode=diff" -y "$(animdir)/palette.bmp"`)
# then apply the palette to get better results
run(`ffmpeg -v 0 -framerate $fps -loop $loop -i $(animdir)/%06d.png -i "$(animdir)/palette.bmp" -lavfi "paletteuse=dither=sierra2_4a" -y $fn`)
end
else
run(`ffmpeg -v 0 -framerate $fps -loop $loop -i $(animdir)/%06d.png -pix_fmt yuv420p -y $fn`)
end