first commit

README

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+Shell script to calculate coordinates
+of an X11 window and then call ffmpeg
+to record screencast with those coordinates.
+
+Press q or Ctrl-C to stop recording.
+
+The resulting mkv file kan be converted to some other
+format again using ffmpeg. For instance:
+
+ffmpeg -i output.mkv -sameq -an output.avi
+

record_object.sh

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+#!/bin/sh
+
+if ! which xwininfo >/dev/null; then
+    echo "install xwininfo first"
+fi
+
+if ! which ffmpeg >/dev/null; then
+    echo "install ffmpeg first"
+fi
+
+txt=`xwininfo`
+
+corner=`echo $txt | sed 's/^.*Corners://' | awk '{print $1}' | sed 's/\(+[0-9]*\)+/\1,/'`
+
+width=`echo $txt | sed 's/^.*Width://' | awk '{print $1}'`
+height=`echo $txt | sed 's/^.*Height://' | awk '{print $1}'`
+
+read -p "Window is ${width}x${height}, continue (y/n)? "
+[ "$REPLY" == "y" ] || exit 1
+
+ffmpeg -f x11grab -r 25 -s ${width}x${height} -i :0.0${corner} -an -vcodec libx264 -vpre lossless_ultrafast -threads 0 output.mkv