Script to record a window + audio in Linux (Solved)

[labbe5]

https://lukas.zapletalovi.com/2019/11/s ... linux.html
Simple script to record a window and audio in Linux

#!/bin/bash

NAME=screencast-$(date +%Y%m%d%H%M)
FPS=10
THREADS=7

echo "Click the window to capture and get ready!"

tmpfile=/tmp/screengrab.tmp.$$
trap 'touch $tmpfile; rm -f $tmpfile' 0

xwininfo > $tmpfile 2>/dev/null
left=$(grep 'Absolute upper-left X:' $tmpfile | awk '{print $4}');
top=$(grep 'Absolute upper-left Y:' $tmpfile | awk '{print $4}');
width=$(grep 'Width:' $tmpfile | awk '{print $2}');
height=$(grep 'Height:' $tmpfile | awk '{print $2}');
geom="-geometry ${width}x${height}+${left}+${top}"
echo "Geometry: ${geom}"
size="${width}x${height}"
pos="${left},${top}"
echo "pos=$pos size=$size"

ffmpeg -y -f pulse -ac 2 -i default -f x11grab -r $FPS -s $size -i ${DISPLAY-0:0}+${pos} -acodec pcm_s16le $NAME-temp.wav -an -vcodec libx264 -preset ultrafast -threads 0 $NAME-temp.mp4

echo Merge audio+video and encode to webm for YouTube? && read

ffmpeg -i $NAME-temp.mp4 -i $NAME-temp.wav -acodec libvorbis -ab 128k -ac 2 -vcodec libvpx -threads $THREADS $NAME.webm

[don570]

The script is listed on git
https://raw.githubusercontent.com/lzap/ ... cordwindow
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press the key 'q' to go to the second stage of combining the two files.
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[takenp]

The above ffmpeg command utilizes pulse audio server that is not present on the most puppies by default. Plus in most cases we just need to capture whole screen with sound/mic.

So here is just a single command line to achieve this goal on every puppy that has ffmpeg installed:

Code: Select all

ffmpeg -f alsa -ac 2 -i hw:0,0 -f x11grab -r 30 -s $(xwininfo -root | grep 'geometry'| awk '{print $2;}') -i :0.0 -acodec libmp3lame -ab 128k -vcodec libx264 -vpre lossless_ultrafast -threads 2 -y output.avi

to recognize which hw card/device numbers to use type

Code: Select all

aplay -l

and choose appropriate card and device number 0,0 or 0,1 etc.

have fun!

[soniabu]

I tried the command but it answers me this:

[takenp]

[quote=":0.0: Invalid argument[/quote]

try remove -i :0.0

or

:0,0

[don570]

replying to soniabu

I have a Dell 990 desktop machine and it can't record the audio at the same time as video.

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[soniabu]

thx all

[Flash]

Thx for what? Is your problem solved?

[soniabu]

yes solved, I use SSR in multimedia section on my bionicpup64.
here: http://murga-linux.com/puppy/viewtopic. ... 26#1049326