CRF=25
AB=128k
RES=1280x720:10M 960x540:2.5M 640x360:500k

all:

define gen_target_mp4
$(basename $1).$2.mp4: $1
	ffmpeg -i $1 -vcodec libx264 -s $2 -crf $(CRF) -ab $(AB) $(basename $1).$2.mp4
all: $(basename $1).$2.mp4
endef

define gen_target_webm
$(basename $1).$2.webm: $1
	ffmpeg -i $1 -vcodec libvpx -s $2 -crf $(CRF) -vb $3 -g 250 -acodec libvorbis -ab $(AB) $(basename $1).$2.webm
all: $(basename $1).$2.webm
endef

define gen_target_poster
$(basename $1).jpg: $1
	ffmpeg -ss 60 -i $1 -vframes 1 $(basename $1).jpg
all: $(basename $1).jpg
endef

define gen_target_html
all: html-$(basename $1)

# Generate HTML after encoding
.PHONY: html-$(basename $1)
html-$(basename $1): $(foreach res,$(RES),$(basename $1).$(word 1,$(subst :, ,$(res))).mp4 $(basename $1).$(word 1,$(subst :, ,$(res))).webm) $(basename $1).jpg
	@echo
	@echo "HTML/Markdown below:"
	@echo
	@echo "<video width=\"1280\" height=\"720\" poster=\"{static}files/videos/$(basename $1).jpg\" controls style=\"max-width:100%;height:auto\">"
	@echo "    <source src=\"{static}files/videos/$(basename $1).1280x720.mp4\" type=\"video/mp4\"/>"
	@echo "    <source src=\"{static}files/videos/$(basename $1).1280x720.webm\" type=\"video/webm\"/>"
	@echo "    Your browser does not support the video tag :("
	@echo "</video>"
	@echo
	@echo "## Download links"
	@echo
	@echo "* MP4:"
	$(foreach res,$(RES),@echo "[$(word 1,$(subst :, ,$(res)))]({static}files/videos/$(basename $1).$(word 1,$(subst :, ,$(res))).mp4)"
	@echo \($(shell ls -lh $(basename $1).$(word 1,$(subst :, ,$(res))).mp4 | cut -d' ' -f5)\)
	)
	@echo "* WebM:"
	$(foreach res,$(RES),@echo "[$(word 1,$(subst :, ,$(res)))]({static}files/videos/$(basename $1).$(word 1,$(subst :, ,$(res))).webm)"
	@echo \($(shell ls -lh $(basename $1).$(word 1,$(subst :, ,$(res))).webm | cut -d' ' -f5)\)
	)

endef

#		Planekonomi_Klimatet_med_Dave_Tomas_O_-43lzPe.mp4
$(foreach src, \
		ratiomatic_assembly.mp4 \
		Planekonomi_Klimatet_med_Dave_Tomas_O_-43lzPe.mp4 \
		ar10.mp4 \
	,$(foreach res,$(RES), \
		$(eval $(call gen_target_mp4,$(src),$(word 1,$(subst :, ,$(res))))) \
		$(eval $(call gen_target_webm,$(src),$(word 1,$(subst :, ,$(res))),$(word 2,$(subst :, ,$(res))))) \
	) \
	$(eval $(call gen_target_poster,$(src))) \
	$(eval $(call gen_target_html,$(src))) \
)