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May 23, 2017 14:41
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Bash script to record screenshots on Android until interrupted, then assemble all screenshots to an animated GIF. Useful for demos etc. Requires ImageMagick's (convert) to be on your path.
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#!/bin/sh | |
PREFIX="Screenshot-$(date +%Y%m%d-%H%M%S)" | |
BASE="/sdcard/$PREFIX" | |
DELAY=300 | |
trap ctrl_c INT | |
function clean_up() { | |
rm -f $PREFIX*.png | |
echo "Cleaned up individual screenshots." | |
adb $1 $2 shell rm -rf $BASE | |
} | |
function pull_images() { | |
echo "Downloading images." | |
adb $1 $2 pull "$BASE/" | |
} | |
function assemble_gif() { | |
for image in $PREFIX/*.png; do | |
if [[ $(identify -quiet $image) ]]; then | |
echo "Valid image $image" | |
else | |
echo "Invalid image file $image, deleting" | |
rm -f $image | |
fi | |
done | |
convert -delay $DELAY -loop 0 "$PREFIX/*.png" $PREFIX.gif | |
echo "Assembled gif $PREFIX.gif" | |
} | |
running=1 | |
function ctrl_c() { | |
echo "Will clean up" | |
running=-1 | |
} | |
adb shell mkdir $BASE | |
i=0 | |
while [ $running -ge 0 ] | |
do | |
i=$(($i+1)) | |
IMAGE="$BASE/$PREFIX-$i.png" | |
adb $1 $2 shell screencap -p $IMAGE | |
echo "Wrote screenshot to $IMAGE" | |
done | |
pull_images | |
assemble_gif | |
clean_up | |
open $PREFIX.gif |
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find:
Screenshot-20160323-125825*.png': No such file or directory convert.im6: unable to open image
Screenshot-20160323-125825_.png': No such file or directory @ error/blob.c/OpenBlob/2638.convert.im6: unable to open file
Screenshot-20160323-125825_.png' @ error/png.c/ReadPNGImage/3667. convert.im6: no images defined
Screenshot-20160323-125825.gif' @ error/convert.c/ConvertImageCommand/3044.Assembled gif Screenshot-20160323-125825.gif
Cleaned up individual screenshots.
Couldn't get a file descriptor referring to the console