FFMPEG script to preprocess caffe-heatmap

ffmpeg-preprocessing.sh

#Squared and resize the video
ffmpeg -i all.mp4 -vf "scale=256:256:force_original_aspect_ratio=decrease,pad=256:256:(ow-iw)/2:(oh-ih)/2" all_square.mp4

#Convert video to gif
ffmpeg -y -i all_square.mp4 -vf fps=10,scale=256:-1:flags=lanczos,palettegen palette.png
ffmpeg -i all_square.mp4 -i palette.png -filter_complex "fps=10,scale=256:-1:flags=lanczos[x];[x][1:v]paletteuse" all.gif

#Convert gif to png
# ffmpeg -i all_square.mp4 -vcodec png pngs/%05d.png
ffmpeg -i all.gif -vcodec png pngs/%0d.png

#Convert png to mp4
ffmpeg -framerate 10 -i joints/join_%0d.png -s:v 256x256 -c:v libx264 -profile:v high -crf 20 -pix_fmt yuv420p joints_all.mp4
ffmpeg -framerate 10 -i heatmap/heatmap_%0d.png -s:v 256x256 -c:v libx264 -profile:v high -crf 20 -pix_fmt yuv420p heatmap_all.mp4