From 2a90f195b6ead01cb8e75b93526f1567af984bf6 Mon Sep 17 00:00:00 2001
From: Sacha Chua <sacha@sachachua.com>
Date: Sun, 10 Nov 2024 19:00:06 -0500
Subject: nicer Makefile rules

---
 roles/prerec/templates/Makefile | 66 +++++++++++++++++++++++++++++++++++++----
 1 file changed, 61 insertions(+), 5 deletions(-)

(limited to 'roles/prerec')

diff --git a/roles/prerec/templates/Makefile b/roles/prerec/templates/Makefile
index 94aa412..7e85900 100644
--- a/roles/prerec/templates/Makefile
+++ b/roles/prerec/templates/Makefile
@@ -1,16 +1,72 @@
 # {{ ansible_managed }}
 
-PRERECS_FINAL := $(wildcard {{ emacsconf_id }}-*--final.webm)
-PRERECS_MAIN := $(patsubst %--final.webm, %--main.webm, $(PRERECS_FINAL))
+VIDEO_EXTS = mp4 mkv webm mov
+source_patterns = $(foreach ext,$(VIDEO_EXTS),$(1)--original.$(ext))
+
+PRERECS_ORIGINAL := $(wildcard emacsconf-*--original.*)
+PREFIXES := $(shell for f in $(PRERECS_ORIGINAL); do echo "$${f%--original.*}"; done)
+PRERECS_REENCODED := $(addsuffix --reencoded.webm, $(PREFIXES))
+PRERECS_OPUS := $(addsuffix --reencoded.opus, $(PREFIXES))
+PRERECS_NORMAL := $(addsuffix --normalized.opus, $(PREFIXES))
+PRERECS_MAIN := $(addsuffix --main.webm, $(PREFIXES))
+PRERECS_CAPTIONS := $(addsuffix --reencoded.vtt, $(PREFIXES))
+PRERECS_FINAL := $(wildcard emacsconf-*--final.webm)
 
 .PHONY: all
-all: $(PRERECS_MAIN) $(PRERECS_FINAL)
 
-emacsconf-%--main.webm: {{ emacsconf_id }}-%--final.webm
+all: reencoded opus normal main $(PRERECS_FINAL)
+
+reencoded: $(PRERECS_REENCODED)
+
+opus: $(PRERECS_OPUS)
+
+normal: $(PRERECS_NORMAL)
+
+captions: $(PRERECS_CAPTIONS)
+
+main: $(PRERECS_MAIN)
+
+emacsconf-%--reencoded.webm: SOURCES = $(call source_patterns, emacsconf-$*)
+emacsconf-%--reencoded.webm:
+	$(eval SOURCE := $(lastword $(sort $(wildcard $(SOURCES)))))
+	@if [ -z "$(SOURCE)" ]; then \
+		echo "No source file found for $@"; \
+		echo "Tried: $(SOURCES)"; \
+		exit 1; \
+	fi
+	@echo "Using source: $(SOURCE)"
+	./reencode-in-screen.sh "$(SOURCE)"
+
+emacsconf-%--reencoded.opus: emacsconf-%--reencoded.webm
+	ffmpeg -i "$<" -c:a copy "$@"
+
+emacsconf-%--normalized.opus: emacsconf-%--reencoded.opus
+	ffmpeg-normalize "$<" -ofmt opus -c:a libopus -o "$@"
+
+emacsconf-%--main.webm: emacsconf-%--reencoded.webm emacsconf-%--normalized.opus emacsconf-%--main.vtt
+	ffmpeg -i emacsconf-$*--reencoded.webm -i emacsconf-$*--normalized.opus -i emacsconf-$*--main.vtt \
+		-map 0:v -map 1:a -c:v copy -c:a copy \
+		-map 2 -c:s webvtt -y \
+		$@
+
+emacsconf-%--main.webm: emacsconf-%--reencoded.webm
 	cp "$<" "$@"
 
-emacsconf-%--final.webm: {{ emacsconf_id }}-%--main.vtt
+emacsconf-%--final.webm: emacsconf-%--main.vtt
 	mux-subs.sh "$@" "$<"
 
+emacsconf-%--reencoded.vtt: emacsconf-%--reencoded.opus
+	whisperx --model large-v2 --align_model WAV2VEC2_ASR_LARGE_LV60K_960H --compute_type int8 --highlight_words True --print_progress True --max_line_width 50 --segment_resolution chunk --max_line_count 1 --language en "$<"
+
+show-files:
+	@echo "Original $(words $(PRERECS_ORIGINAL)):"
+	@echo "$(PRERECS_ORIGINAL)"
+	@echo "Prefixes $(words $(PREFIXES)):"
+	@echo "$(PREFIXES)"
+	@echo "Reencoded $(words $(PRERECS_REENCODED)):"
+	@echo "$(PRERECS_REENCODED)"
+	@echo "Opus $(words $(PRERECS_OPUS)):"
+	@echo "$(PRERECS_OPUS)"
+
 rsync:
 	rsync -avzue ssh {{ emacsconf_caption_dir }}/cache/ orga@media.emacsconf.org:/var/www/media.emacsconf.org/{{ emacsconf_year }}/backstage/
-- 
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