From: Einar Jørgen Haraldseid <einar@haraldseid.net>
Date: Tue, 28 May 2013 21:46:40 +0000 (+0200)
Subject: screencast.sh is a quick and dirty video screen recording script
X-Git-Url: https://git.slaskete.net/einar-bin/commitdiff_plain/8e230a3828e95a6a33aff1d443f823f37688afd7?ds=sidebyside

screencast.sh is a quick and dirty video screen recording script

written in bash with zenity and gstreamer. It does a lot of things that
other screen recorders don't.
---

diff --git a/screencast.sh b/screencast.sh
new file mode 100755
index 0000000..f1a2668
--- /dev/null
+++ b/screencast.sh
@@ -0,0 +1,87 @@
+#!/bin/bash
+# WARNING: This is a terribly dirty and messy shellscript, written over a couple of late nights
+# There was alcohol
+# You probably need to install all the gstreamer-plugins (at least -ugly and -ffmpeg) to get this to work
+# I wanted to make mp4 with x264, I didn't bother with free codecs
+
+# This script allows you to create screencasts on Linux, with optional sound inputs (both Mic and system sounds)
+# You also get to choose to record from the whole screen or just a specified window. It has only been tested
+# on Fedora 18.
+
+# Written by Einar Jørgen Haraldseid (http://einar.slaskete.net)
+# License: http://sam.zoy.org/wtfpl/COPYING
+
+# Get device names and pretty names for playback sinks:
+PLAYSINKLIST=$(pacmd list-sinks | grep -e "name: " -e "device.description = " | cut -d " " -f "2-" | sed -e "s/name: \|= //g" -e "s/<\|>\|\x22//g")
+
+# Display playback monitor chooser
+PLAYMON=$(echo "${PLAYSINKLIST}
+none
+Don't capture system sounds" | zenity --list --title "Choose Output Device" --text "Choose a sound device to capture system sound from:" --column "device" --column "Name" --print-column=1 --hide-column=1 2>/dev/null)
+
+if [ -z ${PLAYMON} ]; then
+  echo "No choice made on output device, assuming cancel."
+  exit 1
+fi
+
+if [ ${PLAYMON} != "none" ]; then
+  # Unmute monitor of the playback sink (if set):
+  PLAYMON="${PLAYMON}.monitor"
+
+  pacmd set-source-mute ${PLAYMON} false >/dev/null
+fi
+
+# Get device names and pretty names for microphones:
+MICLIST=$(pacmd list-sources | grep -e "name: " -e "device.description = " | grep -v -i "monitor" | cut -d " " -f "2-" | sed -e "s/name: \|= //g" -e "s/<\|>\|\x22//g")
+
+# Display device chooser
+MIC=$(echo "${MICLIST}
+none
+Don't use a microphone" | zenity --list --title "Choose Microphone" --text "Choose a microphone to capture voice from:" --column "device" --column "Name" --print-column=1 --hide-column=1 2>/dev/null)
+
+if [ -z ${MIC} ]; then
+  echo "No choice made on microphone, assuming cancel."
+  exit 1
+fi 
+
+# Get target window for recording:
+TARGET=$(echo "root
+Whole screen
+window
+Specific window" | zenity --list --title "Choose recording mode" --text "Do you want to record the whole screen, or record a specific window?" --column "target" --column "Mode" --print-column=1 --hide-column=1 2>/dev/null)
+
+if [ -z ${TARGET} ]; then
+  echo "No choice for recording target, assuming cancel."
+  exit 1
+fi
+
+if [ ${TARGET} = "root" ]; then
+  echo "Root chosen"
+  XWININFO=$(xwininfo -root)
+else
+  echo "custom chosen"
+  XWININFO=$(xwininfo)
+fi
+
+# Get Window ID and dimensions, make sure dimensions are divisible by two, or else the encoder will fail
+WID=$(echo "${XWININFO}" | grep "Window id:" | awk '{print $4}')
+WIDTH=$(echo "${XWININFO}" | grep "Width: " | cut -d ":" -f 2 | awk '{print $1+$1%2}')
+HEIGHT=$(echo "${XWININFO}" | grep "Height: " | cut -d ":" -f 2 | awk '{print $1+$1%2}')
+
+# Calculate a suitable bitrate based on window dimensions
+BITRATE=$(echo "${WIDTH} * ${HEIGHT} * 0.006" | bc | cut -d "." -f 1 )
+
+# Enable inputs as suitable
+if [ ${PLAYMON} != "none" ]; then
+  MONITORARG="pulsesrc device=${PLAYMON} slave-method=0 provide-clock=false ! audiorate ! audioconvert ! ffenc_aac bitrate=256000 ! queue2 ! mux."
+fi
+if [ ${MIC} != "none" ]; then
+  MICARG="pulsesrc device=${MIC} slave-method=0 provide-clock=false ! audiorate ! audioconvert ! ffenc_aac bitrate=256000 ! queue2 ! mux."
+fi
+
+# Launch gstreamer
+gst-launch -e ximagesrc xid="${WID}" do-timestamp=1 use-damage=0 ! video/x-raw-rgb,framerate=30/1 \
+ ! ffmpegcolorspace ! videoscale method=0 ! video/x-raw-yuv,width=${WIDTH},height=${HEIGHT} \
+ ! x264enc speed-preset=ultrafast bitrate=${BITRATE} ! queue2 \
+ ! mp4mux name="mux" ! filesink location="output.mp4" $MONITORARG $MICARG
+