/process-podcasts-Makefile
Last active Aug 26, 2017
| # process podcasts | |
| MP3S = $(filter-out $(wildcard *.64kbit.mp3),$(wildcard *.mp3)) | |
| PROCESSED = $(patsubst %.mp3,%.64kbit.mp3,$(MP3S)) | |
| .PHONY: process | |
| process: videos $(PROCESSED) | |
| @echo Done. | |
| .PHONY: videos | |
| videos: $(wildcard *.mp4) | |
| @if [ -n "$^" ]; then \ | |
| echo Moving $^. ; \ | |
| mv $^ video/ABC/ ; \ | |
| fi | |
| %.64kbit.mp3: %.mp3 | |
| @echo Processing $^ | |
| @nice sox --no-show-progress --multi-threaded \ | |
| --buffer 32768 --norm "$<" "$@" \ | |
| tempo -s 1.33 channels 1 rate 22050 | |
| @# strip id3 tags so player puts all podcasts in the same folder | |
| @id3v2 -D $@ > /dev/null | |
| @mv $< reencode/original/ | |
| @echo Done $^ |
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tompaton commentedAug 26, 2017
The goal is to:
a) reduce filesize of podcasts (192kbit/s is overkill for spoken word!)
b) normalize the volume and convert to mono (easier to listen to when riding/running and it's windy)
c) speed up playback (people talk too slow!)
d) strip tags (so my dinky mp3 player doesn't put the podcasts into different "folders")
Prerequisites: