From 19c60a7c2b3115f37a107b5fd939bbdaba44ce6e Mon Sep 17 00:00:00 2001
From: Jonas Smedegaard <dr@jones.dk>
Date: Mon, 8 May 2017 14:01:25 +0200
Subject: Initial draft of script livedump.

---
 bin/livedump | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100755 bin/livedump

diff --git a/bin/livedump b/bin/livedump
new file mode 100755
index 0000000..77b2add
--- /dev/null
+++ b/bin/livedump
@@ -0,0 +1,48 @@
+#!/bin/sh
+#
+# Usage: livedump [FORMAT [BASEPATH [SESSIONPATTERN [SEGMENTPATTERN]]]]
+#
+#   Patterns are fed through "date +PATTERN"
+#
+# Examples: livedump
+#           livedump dv ./dump /%Y%m%d/%H%M%S /%H%M%S
+#
+#   (examples are effectively identical, the latter showing defaults)
+#
+# Description: Save live source to file and append if interupted.
+# By default captures IEC61883 DVCPRO stream from IEEE1394 (Firewire)
+# device, some of which apparently sustaining streams max. 17 minutes.
+#
+# Depends: ffmpeg
+
+set -eu
+
+FORMAT=${1:-dv}
+BASEPATH=${2:-./dump}
+SESSIONPATTERN=${3:-/%Y%m%d/%H%M%S}
+SEGMENTPATTERN=${4:-/%H%M%S}
+
+case $FORMAT in
+  dv)
+	set -- \
+		-f iec61883 -i auto \
+		-f dv -timecode "$(date +%H:%M:%S.00)" -codec copy
+	SUFFIX=dv
+	;;
+esac
+
+LINKPATH="$LINKSTEM.$SUFFIX"
+SESSIONSTEM=$(date +"$TARGETPATTERN")
+SESSIONPATH="$SESSIONSTEM.$SUFFIX"
+
+mkdir -p "$(dirname "$LINKPATH" "$SESSIONPATH")"
+touch "$SESSIONPATH"
+[ -z "$LINKPATH" ] | ln -fs "$SESSIONPATH" "$LINKPATH"
+while true; do
+	SEGMENTSTEM=$(date +"$SEGMENTPATTERN")
+	LOGPATH="$BASEPATH$SESSIONSTEM$SEGMENTSTEM.log"
+	mkdir -p "$LOGPATH"
+	FFREPORT="file=$LOGPATH" \
+	ffmpeg -hide_banner "$@" pipe: \
+	>> "$SESSIONPATH"
+done
-- 
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