git.slaskete.net - einar-bin/blob - screencast.sh

   1 #!/bin/bash
   2
   3 # WARNING: This is a terribly dirty and messy shellscript, written over a
   4 # couple of late nights. There was alcohol …
   5 # You probably need to install all the gstreamer-plugins (at least -ugly
   6 # and -ffmpeg) as well as gstreamer-tools to get this to work. I wanted to
   7 # make mp4 files with x264, I didn't bother with free codecs.
   8 #
   9 # So this script allows you to create screencasts on Linux, with optional
  10 # sound inputs (both Microphone and system sounds). It stores system sounds
  11 # and microphone in separate audio streams.
  12 #
  13 # You also get to choose to record from the whole screen or just a specified
  14 # window. It has been tested on Fedora 18, Ubuntu 13.04 and CrunchBang Waldorf
  15 # (and thus should work on Debian Wheezy as well).
  16 #
  17 # If you're using GStreamer 1.0, please jump to the bottom of the script
  18 # and comment out the gst-launch-0.10 pipeline and uncomment the 1.0 pipeline.
  19 #
  20 # It dumps the recording in your $HOME directory with a filename like
  21 # screencast-YYYY-MM-DD-HH-MM-SS.mp4
  22 #
  23 # Written by Einar Jørgen Haraldseid (http://einar.slaskete.net)
  24 # License: http://sam.zoy.org/wtfpl/COPYING
  25
  26 # Get device names and pretty names for enumerating playback sinks:
  27 PLAYSINKLIST=$(pacmd list-sinks | \
  28  grep -e "name: " -e "device.description = " | cut -d " " -f "2-" | \
  29  sed -e "s/name: \|= //g" -e "s/<\|>\|\x22//g")
  30
  31 # Display playback monitor chooser
  32 PLAYMON=$(echo "${PLAYSINKLIST}
  33 none
  34 Don't capture system sounds" | \
  35  zenity --list --title "Choose Output Device" \
  36  --text "Choose a sound device to capture system sound from:" \
  37  --column "device" --column "Name" --print-column=1 \
  38  --hide-column=1 2>/dev/null)
  39
  40 # Catch cancel
  41 if [ -z ${PLAYMON} ]; then
  42   echo "No choice made on output device, assuming cancel."
  43   exit 1
  44 fi
  45
  46 if [ ${PLAYMON} != "none" ]; then
  47   # Unmute monitor of the playback sink (if set):
  48   PLAYMON="${PLAYMON}.monitor"
  49   pacmd set-source-mute ${PLAYMON} false >/dev/null
  50   echo "Recording system sounds from ${PLAYMON}"
  51 else
  52   echo "Not recording system sounds."
  53 fi
  54
  55 # Get device names and pretty names for microphones:
  56 MICLIST=$(pacmd list-sources | \
  57  grep -e "name: " -e "device.description = " | \
  58  grep -v -i "monitor" | cut -d " " -f "2-" | \
  59  sed -e "s/name: \|= //g" -e "s/<\|>\|\x22//g")
  60
  61 # Display device chooser
  62 MIC=$(echo "${MICLIST}
  63 none
  64 Don't use a microphone" | \
  65  zenity --list --title "Choose Microphone" \
  66  --text "Choose a microphone to capture voice from:" \
  67  --column "device" --column "Name" --print-column=1 \
  68  --hide-column=1 2>/dev/null)
  69
  70 if [ -z ${MIC} ]; then
  71   echo "No choice made on microphone, assuming cancel."
  72   exit 1
  73 fi
  74
  75 if [ ${MIC} != "none" ]; then
  76   echo "Recording voice from ${MIC}"
  77 else
  78   echo "Not recording voice."
  79 fi
  80
  81 # Get target window for recording:
  82 TARGET=$(echo "root
  83 Whole screen
  84 window
  85 Specific window" | \
  86  zenity --list --title "Choose recording mode" \
  87  --text "Do you want to record the whole screen,\
  88  or record a specific window?" --column "target" \
  89  --column "Mode" --print-column=1 --hide-column=1 2>/dev/null)
  90
  91 if [ -z ${TARGET} ]; then
  92   echo "No choice for recording target, assuming cancel."
  93   exit 1
  94 fi
  95
  96 if [ ${TARGET} = "root" ]; then
  97   echo "Root window chosen."
  98   XWININFO=$(xwininfo -root)
  99 else
 100   echo "Custom window chosen."
 101   XWININFO=$(xwininfo)
 102 fi
 103
 104 # Get Window ID and dimensions, make sure X and Y dimensions are
 105 # divisible by two, or else the encoder will fail
 106 WID=$(echo "${XWININFO}" | grep "Window id:" | awk '{print $4}')
 107 WIDTH=$(echo "${XWININFO}" | grep "Width: " | \
 108  cut -d ":" -f 2 | awk '{print $1+$1%2}')
 109 HEIGHT=$(echo "${XWININFO}" | grep "Height: " | \
 110  cut -d ":" -f 2 | awk '{print $1+$1%2}')
 111
 112 # Calculate a suitable bitrate based on window dimensions
 113 BITRATE=$(echo "${WIDTH} * ${HEIGHT} * 0.0075" | bc | cut -d "." -f 1 )
 114
 115 # Set file name.
 116 FILENAME="screencast-$(date +%F-%H-%M-%S).mp4"
 117
 118 # Enable inputs as suitable
 119 if [ ${PLAYMON} != "none" ]; then
 120   MONITORARG="pulsesrc device=${PLAYMON} slave-method=0 provide-clock=false \
 121    ! audiorate ! audioconvert ! ffenc_aac bitrate=256000 ! queue2 ! mux."
 122 fi
 123 if [ ${MIC} != "none" ]; then
 124   MICARG="pulsesrc device=${MIC} slave-method=0 provide-clock=false \
 125    ! audiorate ! audioconvert ! ffenc_aac bitrate=256000 ! queue2 ! mux."
 126 fi
 127
 128 # Launch gstreamer (Using gstreamer 0.10)
 129 gst-launch-0.10 -q -e ximagesrc xid="${WID}" do-timestamp=1 use-damage=0 \
 130  ! video/x-raw-rgb,framerate=30/1 ! ffmpegcolorspace  ! videoscale method=0 \
 131  ! video/x-raw-yuv,width=${WIDTH},height=${HEIGHT} \
 132  ! x264enc speed-preset=veryfast bitrate=${BITRATE} ! queue2 \
 133  ! mp4mux name="mux" \
 134  ! filesink location="${HOME}/${FILENAME}" ${MONITORARG} ${MICARG}
 135
 136 # Launch gstreamer (Using gstreamer 1.0)
 137 #gst-launch-1.0 -q -e ximagesrc xid="${WID}" do-timestamp=1 use-damage=0 \
 138 # ! video/x-raw,framerate=30/1 ! videoscale method=0 \
 139 # ! video/x-raw,width=${WIDTH},height=${HEIGHT} ! videoconvert \
 140 # ! x264enc speed-preset=veryfast bitrate=${BITRATE} ! queue2 \
 141 # ! filesink location="${HOME}/${FILENAME}" ${MONITORARG} ${MICARG}
 142
 143 echo "Recording done, file is ${FILENAME}"