my scripts for screen recording

README.rst

record scripts

Scripts I wrote for screen recording.

Dependencies

• setup-record.sh: st, x11fs
• merge.sh, re-encode.sh, and record.sh: FFmpeg
• win-resize.sh: wmctrl

Copyright

The contents in this repository have been placed in public domain, or via UNLICENSE, if not applicable.

bashrc

#!/bin/bash

source $HOME/.bashrc
PS1="\[\e[1;32m\]$(basename -- "$PWD")\[\e[0m\] \[\e[1;34m\]$\[\e[0m\] "

merge.sh

#!/bin/bash
# Simple clips merger, only support video streams
# Written by Yu-Jie Lin in 2013, 2015-2016
# Public domain, or via UNLICENSE, if not applicable

OUTFILE="output.re-encoded.mkv"

while getopts 'f:o:n' opt; do
  case "$opt" in
    f)
      FPS="-r $OPTARG"
      ;;
    o)
      OUTFILE="$OPTARG"
      ;;
    n)
      ECHO=echo
      ;;
  esac
done
shift $((OPTIND - 1))

INPUTS=("$@")
I=()
F_C=()
# generating
# -i file1 -i file2 ...
#      |        |
#  +---+ +------+
#  |     |
#  v     v
# [0:0] [1:0] [...] concat=n=#:v=1:a=0 [v]
for ((i=0; i<${#INPUTS[@]}; i++)); do
  I+=('-i' "${INPUTS[i]}")
  F_C+=("[$i:0]")
done

$ECHO \
ffmpeg \
  "${I[@]}" \
  -filter_complex "${F_C[*]} concat=n=${#INPUTS[@]}:v=1:a=0 [v]" \
  -map '[v]' \
  -c:v libx264 \
  -preset veryfast \
  -crf 18 \
  -pix_fmt yuv420p \
  $FPS \
  "$OUTFILE"

nextup.sh

#!/bin/bash
# Written by Yu-Jie Lin in 2015
# Public domain, or via UNLICENSE, if not applicable

# command display delay
delay=1
# command execution delay
DELAY=1

while getopts 'd:D:' opt; do
  case "$opt" in
    d)
      delay=$OPTARG
      ;;
    D)
      DELAY=$OPTARG
      ;;
  esac
done
shift $((OPTIND - 1))

exec 3<&0
grep -v '^#' <"$1" |
while read cmd; do
  clear
  echo "***** NEXT UP *****"
  echo "$cmd" | pygmentize -l bash 
  until read desc; [[ -z "$desc" ]]; do
    echo "$desc"
  done
  read -u 3 -t $delay
  sh -c "$cmd" 0<&3
  read -u 3 -t $DELAY
done
exec 3<&-

re-encode.sh

#!/bin/bash
# Written by Yu-Jie Lin in 2013, 2015-2016
# Public domain, or via UNLICENSE, if not applicable

while getopts 'n' opt; do
  case "$opt" in
    n)
      ECHO=echo
      ;;
  esac
done
shift $((OPTIND - 1))

# https://trac.ffmpeg.org/wiki/EncodeforYouTube
INFILE="$1"
OUTFILE="${INFILE%.*}.re-encoded.mkv"

$ECHO \
ffmpeg \
  -i "$INFILE" \
  -c:v libx264 \
  -preset veryfast \
  -crf 18 \
  -pix_fmt yuv420p \
  "$OUTFILE"

record.sh

#!/bin/bash
# Written by Yu-Jie Lin in 2013-2016
# Public domain, or via UNLICENSE, if not applicable

OUTFILE=out.mkv
LOPTS="-loglevel warning -stats"
IOPTS="-show_region 1"
DEF_COPTS='-vcodec ffvhuff -threads 0'
COPTS="$DEF_COPTS"
OOPTS=""
POS=2,20
FPS=5
SIZE=1280x720
THREAD_SIZE='-thread_queue_size 16384'

while getopts 'f:s:p:y:t:o:L:I:C:O:an' opt; do
  case "$opt" in
    f)
      FPS=$OPTARG
      ;;
    s)
      SIZE=$OPTARG
      ;;
    p)
      POS=$OPTARG
      ;;
    t)
      T="-t $OPTARG"
      ;;
    o)
      OUTFILE="$OPTARG"
      ;;
    L)
      LOPTS="$OPTARG"
      ;;
    I)
      IOPTS="$IOPTS $OPTARG"
      ;;
    C)
      COPTS="$OPTARG"
      ;;
    O)
      OOPTS="$OOPTS $OPTARG"
      ;;
    a)
      COPTS=
      AOPTS="-f alsa $THREAD_SIZE -i pulse"
      ;;
    n)
      ECHO=echo
      ;;
  esac
done

REGION=":0.0+$POS"

if [[ $OUTFILE = *.gif ]]; then
  OUTFILE_GIF="$OUTFILE"
  OUTFILE="$OUTFILE.mkv"
  AOPTS=
elif [[ $OUTFILE = *.mp4 ]]; then
  # if recording as .mp4, just record x264
  COPTS="-c:v libx264 -preset ultrafast -g $((FPS * 2)) -keyint_min $FPS -pix_fmt yuv420p ${COPTS/$DEF_COPTS/}"
fi

if [[ $AOPTS ]]; then
  if [[ -z "$T" ]]; then
    echo -e "Recommend setting: \e[1;32m-t ##\e[0m. Or FFmpeg may produce a flawed audio." >&2
  fi

  # play a 1000 second 1Hz sine wave in the background for helping FFmpeg A/V
  # out-of-sync issue
  echo 48000000 0 1 | wave | aplay -f FLOAT_LE -r 48000 -c 1 -q &
  APID=$!
fi

# http://stackoverflow.com/questions/10166204/ffmpeg-screencast-recording-which-codecs-to-use
$ECHO \
ffmpeg \
  $LOPTS \
  -f x11grab \
  $IOPTS \
  -r "$FPS" -s "$SIZE" $THREAD_SIZE -i "$REGION" \
  $AOPTS \
  $COPTS \
  $T \
  $OOPTS \
  "$OUTFILE"

if [[ $APID ]]; then
  kill $APID
fi

if [[ $OUTFILE_GIF ]]; then
  PALETTE="$OUTFILE.palette.png"
  ffmpeg $LOPTS -i "$OUTFILE" -vf "palettegen" -y "$PALETTE"
  ffmpeg $LOPTS -i "$OUTFILE" -i "$PALETTE" -lavfi 'copy [x]; [x][1:v] paletteuse' "$OUTFILE_GIF"
  rm -i "$OUTFILE"
  rm -i "$PALETTE"
fi

setup-record.sh

#!/bin/bash
# Set up a st window to get started with recording
#
# Required switching to floating layout in DWM.
#
# Written by Yu-Jie Lin in 2014-2016
# Public domain, or via UNLICENSE, if not applicable

############
# Settings #
############

# Screeen size and border width

SW=1680
SH=1050
B=2

# Geometry for new terminal window

W=1280
H=720
X=0
Y=18

# Path for Akemi

X11FS=/tmp/.x11fs

# Font setting

######################
# Initializing Akemi #
######################

mkdir -p "$X11FS"
x11fs "$X11FS" -o auto_unmount

###########################
# Move the current window #
###########################

cd "$X11FS"/$(<$X11FS/focused)/geometry
echo "$((SW - 2 * B))" > width
echo "$((SH - Y - (H + 2 * B) - 2 * B))" > height
echo "0" > x
echo "$((Y + H + 2 * B))" > y
cd "$OLDPWD"

####################################
# Creating the new terminal window #
####################################

FONT="Envy Code R:size=26:antialias=false:autohint=false"
BSRC="$HOME/p/gist/record-scripts/bashrc"
TMUX= nohup st -f "$FONT" bash --rcfile "$BSRC" &>/dev/null &
sleep 1

##############################################
# Resizing and re-positioning the new window #
##############################################

cd "$X11FS"/$(<$X11FS/focused)/geometry
echo "$W" > width
echo "$H" > height
echo "$X" > x
echo "$Y" > y
cd "$OLDPWD"

#############
# Finishing #
#############

pkill x11fs
sleep 1
rmdir "$X11FS"

UNLICENSE

This is free and unencumbered software released into the public domain.

Anyone is free to copy, modify, publish, use, compile, sell, or
distribute this software, either in source code form or as a compiled
binary, for any purpose, commercial or non-commercial, and by any
means.

In jurisdictions that recognize copyright laws, the author or authors
of this software dedicate any and all copyright interest in the
software to the public domain. We make this dedication for the benefit
of the public at large and to the detriment of our heirs and
successors. We intend this dedication to be an overt act of
relinquishment in perpetuity of all present and future rights to this
software under copyright law.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

For more information, please refer to <http://unlicense.org/>

win-resize.sh

#!/bin/bash
# Using xwininfo and wmctrl to resize a window
# Written by Yu-Jie Lin in 2012, 2013, 2015
# Public domain, or via UNLICENSE, if not applicable

W=$1
H=$2
X=${3:--1}
Y=${4:--1}

wmctrl -r :SELECT: -e 0,$X,$Y,$W,$H