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add w520rec: fully featured stream-ready recording setup

see also: http://nopenopenope.net/posts/twitch

--- a/bin/w520rec

+++ b/bin/w520rec

@@ -1,8 +1,10 @@

-#!/bin/rc

+#!/bin/rc -e

+rfork ne

 # no noise gate/suppression for the mic

 # everything plugged into mixer, mixer's usb card on w500, recording

 # on w520 using w500's audio

+echo slay hj264 aacenc cam '|' rc

 echo hwgc soft >/dev/vgactl

 echo blanktime 0 >/dev/mousectl

@@ -26,5 +28,8 @@

 read -n 1 >/dev/null

 rimport -u qwx w500 '#u' /n/c

+#window -hide -m rc -c 'norm 2 </n/c/audioin | audio/flacenc >/tmp/rec.`{date -t}^.flac'

 window -m rc -c 'audio/aacenc -B 262144 -b </n/c/audioin >/tmp/rec.`{date -t}^.aac'

+# monitor's refresh rate is 30Hz on hdmi (4k)

+# for 1080p, optimum: -f 60 -k 2000 -Q 50

 video/hj264 -f 50 -k 1000 -Q 50 /dev/screen > /tmp/rec.^`{date -t}^.264