2019年09月26日 How to capture Windows desktop with ffmpeg [長年日記]
_ ffmpeg.exeを使ってWindows10でデスクトップ操作をキャプチャする方法
ffmpeg.exe -y -f gdigrab -framerate 29.97 -i desktop -r 29.97 -c:v h264 -b:v 1000k -pix_fmt yuv420p capture.mp4
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2019年09月27日 Script to blur specified rectangle of movie [長年日記]
_ blurmovie.sh - 動画の一部(矩形領域)にボカシを入れるシェルスクリプト
#! /bin/sh
#
if [ "X$1" = "X-h" -o "X$1" = "X--help" ]
then
echo "Usage: $0 [-s starttime] [-e elapstime] [-r rectangle] [-vc vcodec] [-vb vbitrate] [-ac acodec] [-ab abitrate] [-i input] [-o output]"
echo "Apply blur effect on specified rectangle of input."
echo ""
echo "-s starttime hh:mm:ss(default 00:00:00)"
echo "-e elapstime hh:mm:ss(default 99:00:00)"
echo "-r rectangle x:y:width:height:blur"
echo "-vc vcodec h264(default), mpeg2video"
echo "-vb vbitrate video bitrate(default 1000k)"
echo "-ac acodec aac(default), any"
echo "-ab abitrate audio bitrate(default 192k)"
exit 0
fi
#
START="00:00:00"
ELAPS="99:00:00"
X=""
Y=""
WIDTH=""
HEIGHT=""
BLUR=""
VCODEC="h264"
VBITRATE="1000k"
ACODEC="aac"
ABITRATE="192k"
INPUT=""
OUTPUT=""
#
while [ $# -ne 0 ]
do
case $1 in
-s)
shift
START="$1"
;;
-e)
shift
ELAPS="$1"
;;
-r)
shift
X=`echo $1|cut -d: -f1`
Y=`echo $1|cut -d: -f2`
WIDTH=`echo $1|cut -d: -f3`
HEIGHT=`echo $1|cut -d: -f4`
BLUR=`echo $1|cut -d: -f5`
;;
-vc)
shift
VCODEC="$1"
;;
-vb)
shift
VBITRATE="$1"
;;
-ac)
shift
ACODEC="$1"
;;
-ab)
shift
ABITRATE="$1"
;;
-i)
shift
INPUT="$1"
;;
-o)
shift
OUTPUT="$1"
;;
esac
shift
done
#
if [ "${VCODEC}" = "h264" ]
then
FFORMAT="mp4"
elif [ "${VCODEC}" = "mpeg2video" ]
then
FFORMAT="mpegts"
else
echo "vcodec should be h264 or mpeg2video, aborted."
exit 1
fi
#
ffmpeg -y \
-i ${INPUT} \
-strict -2 \
-ss ${START} \
-t ${ELAPS} \
-c:v ${VCODEC} \
-b:v ${VBITRATE} \
-c:a ${ACODEC} \
-b:a ${ABITRATE} \
-filter_complex "[0:v]crop=w=${WIDTH}:h=${HEIGHT}:x=${X}:y=${Y},boxblur=lp=${BLUR}[chat];[0:v][chat]overlay=${X}:${Y}" \
-f ${FFORMAT} \
${OUTPUT}
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