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

   1 #!/bin/bash
   2 # WARNING: This is a terribly dirty and messy shellscript, written over a couple of late nights
   3 # There was alcohol
   4 # You probably need to install all the gstreamer-plugins (at least -ugly and -ffmpeg) to get this to work
   5 # I wanted to make mp4 with x264, I didn't bother with free codecs
   6
   7 # This script allows you to create screencasts on Linux, with optional sound inputs (both Mic and system sounds)
   8 # You also get to choose to record from the whole screen or just a specified window. It has only been tested
   9 # on Fedora 18.
  10
  11 # Written by Einar Jørgen Haraldseid (http://einar.slaskete.net)
  12 # License: http://sam.zoy.org/wtfpl/COPYING
  13
  14 # Get device names and pretty names for playback sinks:
  15 PLAYSINKLIST=$(pacmd list-sinks | grep -e "name: " -e "device.description = " | cut -d " " -f "2-" | sed -e "s/name: \|= //g" -e "s/<\|>\|\x22//g")
  16
  17 # Display playback monitor chooser
  18 PLAYMON=$(echo "${PLAYSINKLIST}
  19 none
  20 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)
  21
  22 if [ -z ${PLAYMON} ]; then
  23   echo "No choice made on output device, assuming cancel."
  24   exit 1
  25 fi
  26
  27 if [ ${PLAYMON} != "none" ]; then
  28   # Unmute monitor of the playback sink (if set):
  29   PLAYMON="${PLAYMON}.monitor"
  30
  31   pacmd set-source-mute ${PLAYMON} false >/dev/null
  32 fi
  33
  34 # Get device names and pretty names for microphones:
  35 MICLIST=$(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")
  36
  37 # Display device chooser
  38 MIC=$(echo "${MICLIST}
  39 none
  40 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)
  41
  42 if [ -z ${MIC} ]; then
  43   echo "No choice made on microphone, assuming cancel."
  44   exit 1
  45 fi
  46
  47 # Get target window for recording:
  48 TARGET=$(echo "root
  49 Whole screen
  50 window
  51 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)
  52
  53 if [ -z ${TARGET} ]; then
  54   echo "No choice for recording target, assuming cancel."
  55   exit 1
  56 fi
  57
  58 if [ ${TARGET} = "root" ]; then
  59   echo "Root chosen"
  60   XWININFO=$(xwininfo -root)
  61 else
  62   echo "custom chosen"
  63   XWININFO=$(xwininfo)
  64 fi
  65
  66 # Get Window ID and dimensions, make sure dimensions are divisible by two, or else the encoder will fail
  67 WID=$(echo "${XWININFO}" | grep "Window id:" | awk '{print $4}')
  68 WIDTH=$(echo "${XWININFO}" | grep "Width: " | cut -d ":" -f 2 | awk '{print $1+$1%2}')
  69 HEIGHT=$(echo "${XWININFO}" | grep "Height: " | cut -d ":" -f 2 | awk '{print $1+$1%2}')
  70
  71 # Calculate a suitable bitrate based on window dimensions
  72 BITRATE=$(echo "${WIDTH} * ${HEIGHT} * 0.006" | bc | cut -d "." -f 1 )
  73
  74 # Enable inputs as suitable
  75 if [ ${PLAYMON} != "none" ]; then
  76   MONITORARG="pulsesrc device=${PLAYMON} slave-method=0 provide-clock=false ! audiorate ! audioconvert ! ffenc_aac bitrate=256000 ! queue2 ! mux."
  77 fi
  78 if [ ${MIC} != "none" ]; then
  79   MICARG="pulsesrc device=${MIC} slave-method=0 provide-clock=false ! audiorate ! audioconvert ! ffenc_aac bitrate=256000 ! queue2 ! mux."
  80 fi
  81
  82 # Launch gstreamer
  83 gst-launch -e ximagesrc xid="${WID}" do-timestamp=1 use-damage=0 ! video/x-raw-rgb,framerate=30/1 \
  84  ! ffmpegcolorspace ! videoscale method=0 ! video/x-raw-yuv,width=${WIDTH},height=${HEIGHT} \
  85  ! x264enc speed-preset=ultrafast bitrate=${BITRATE} ! queue2 \
  86  ! mp4mux name="mux" ! filesink location="output.mp4" $MONITORARG $MICARG
  87