twmp4

1 files changed, 34 insertions, 0 deletions

diff --git a/dot/local/bin/twmp4 b/dot/local/bin/twmp4
new file mode 100755
index 0000000..9b80425
--- /dev/null
+++ b/dot/local/bin/twmp4
@@ -0,0 +1,34 @@
+#!/bin/sh
+INPUT=$1
+set -ex
+
+[ -f "$INPUT" ]
+case "$INPUT" in
+    *.mp4) OUTPUT=${INPUT%.mp4}.twitter.mp4 ;;
+    *.*) OUTPUT=${INPUT%.*}.twitter.mp4 ;;
+    *) OUTPUT=${INPUT}.twitter.mp4 ;;
+esac
+
+# source: https://gist.github.com/nikhan/26ddd9c4e99bbf209dd7
+
+if [ ! -e "$OUTPUT" ]
+then
+    ffmpeg -i "$INPUT" -vcodec libx264 \
+        -vf 'scale=640:trunc(ow/a/2)*2' \
+        -acodec aac \
+        -vb 1024k \
+        -minrate 1024k -maxrate 1024k \
+        -bufsize 1024k -ar 44100 \
+        -strict experimental \
+        -r 30 \
+        "$OUTPUT"
+fi
+
+# source: https://unix.stackexchange.com/questions/1670/how-can-i-use-ffmpeg-to-split-mpeg-video-into-10-minute-chunks/212518#212518
+
+CHUNKS=${OUTPUT%.mp4}.%03d.mp4
+ffmpeg -i "$OUTPUT" \
+       -c copy \
+       -map 0 \
+       -segment_time 2:15 -f segment -reset_timestamps 1 "$CHUNKS"
+