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| author | Mattias Andrée <maandree@kth.se> | 2017-01-14 09:08:56 +0100 |
|---|---|---|
| committer | Mattias Andrée <maandree@kth.se> | 2017-01-14 09:08:56 +0100 |
| commit | 31660ca5df7e1a906defdab36823aa8791025a61 (patch) | |
| tree | db027c279be3e73f6f7eb6e395bff778bb2aeac2 /examples/split/Makefile | |
| parent | Fix blind-split and add example (diff) | |
| download | blind-31660ca5df7e1a906defdab36823aa8791025a61.tar.gz blind-31660ca5df7e1a906defdab36823aa8791025a61.tar.bz2 blind-31660ca5df7e1a906defdab36823aa8791025a61.tar.xz | |
blind-from-video and blind-split: add -L
This, combined with blind-to-video, allows the user to split
a video file by frames (rather than time as with ffmpeg) into
multiple files without ever storing the video in a raw format.
This is feature is important because ever short video can take
a 100 GB in raw format.
Diffstat (limited to 'examples/split/Makefile')
| -rw-r--r-- | examples/split/Makefile | 31 |
1 files changed, 17 insertions, 14 deletions
diff --git a/examples/split/Makefile b/examples/split/Makefile index 9e434b1..2575dd6 100644 --- a/examples/split/Makefile +++ b/examples/split/Makefile @@ -4,15 +4,21 @@ SHELL = bash # We need Bash's process substitution operator >() # because we want to convert the files back to a # cooked format, because raw takes a serious amount -# of space. +# of space. It is of course also possible to use +# FIFO:s. DRAFT = -d # Useful for better performance when not working # with colours or not caring about colours. FFMPEG_ARGS = -c:v libx264 -preset veryslow -crf 0 -pix_fmt yuv444p - -TEMPFILE = temp.uivf +# ↑~~~~~~~~~~~ ↑~~~~~~~~~~~~~~~ ↑~~~~~~~~~~~~~~~~~~~~~~ +# │ │ │ +# │ │ └──── Lossless +# │ │ +# │ └──── High compression +# │ +# └──── H.264, a lossless-capable codec FRAME_1 = 10 FRAME_2 = 20 @@ -20,20 +26,17 @@ FRAME_3 = 30 FRAME_4 = 40 FRAME_5 = end -1.mkv 2.mkv 3.mkv 4.mkv 5.mkv: $(TEMPFILE) +1.mkv 2.mkv 3.mkv 4.mkv 5.mkv: $(INPUT_VIDEO) framerate=$$(ffprobe -v quiet -show_streams -select_streams v - < "$(INPUT_VIDEO)" | \ grep '^r_frame_rate=' | cut -d = -f 2) && \ - ../../blind-split >(../../blind-to-video $(DRAFT) $${framerate} $(FFMPEG_ARGS) 1.mkv) $(FRAME_1) \ - >(../../blind-to-video $(DRAFT) $${framerate} $(FFMPEG_ARGS) 2.mkv) $(FRAME_2) \ - >(../../blind-to-video $(DRAFT) $${framerate} $(FFMPEG_ARGS) 3.mkv) $(FRAME_3) \ - >(../../blind-to-video $(DRAFT) $${framerate} $(FFMPEG_ARGS) 4.mkv) $(FRAME_4) \ - >(../../blind-to-video $(DRAFT) $${framerate} $(FFMPEG_ARGS) 5.mkv) $(FRAME_5) \ - < $(TEMPFILE) - -$(TEMPFILE): $(INPUT_VIDEO) - ../../blind-from-video $(DRAFT) $(INPUT_VIDEO) $(TEMPFILE) + ../../blind-from-video -L $(DRAFT) "$(INPUT_VIDEO)" - | \ + ../../blind-split -L >(../../blind-to-video $(DRAFT) $${framerate} $(FFMPEG_ARGS) 1.mkv) $(FRAME_1) \ + >(../../blind-to-video $(DRAFT) $${framerate} $(FFMPEG_ARGS) 2.mkv) $(FRAME_2) \ + >(../../blind-to-video $(DRAFT) $${framerate} $(FFMPEG_ARGS) 3.mkv) $(FRAME_3) \ + >(../../blind-to-video $(DRAFT) $${framerate} $(FFMPEG_ARGS) 4.mkv) $(FRAME_4) \ + >(../../blind-to-video $(DRAFT) $${framerate} $(FFMPEG_ARGS) 5.mkv) $(FRAME_5) clean: - -rm 1.mkv 2.mkv 3.mkv 4.mkv 5.mkv $(TEMPFILE) + -rm 1.mkv 2.mkv 3.mkv 4.mkv 5.mkv .PHONY: clean |