Idea of creating a desktop recorded program using FFmpeg with Pause option

It is possible to record desktop in a terminal with FFmpeg but is not possible have pause option, only with Ctrl + C is possible to stop the video but this create a video (then several by repeating this) and to Resume is necessary to start again the recording and next with other commands joing the video files. Because this I have been searching the Web tirelessly on Github, Gitlab, fling.com, Google, I was looking for someone who has done a GUI program to use FFmpeg on Linux to make Screencast and be able to put Pause, I found a GUI software writing in Go (https://golang.org/) called ffmpegui:

https://github.com/raviraa/ffmpegui/

 

are an explanation about there:

 

THE PAUSE OPTION FOR FFMPEG

The main idea of this program is join all video files in the stop option button:

 

 

but the developer writing it on a MAC OS X and I can't run on Linux, but the developer said that have Linux support, I don't know how to

XvidCap abandoned

I started looking for this idea because I know the xvidcap application which can be configured to record a rectangle + follow the mouse, and is possible to move inside the box, and have Pause, but the application has been abandoned

XvidCap is available in:

https://sourceforge.net/projects/xvidcap/files/xvidcap/1.1.7/

I tested in MX Linux 19.3 x386 with the version:

xvidcap 1.1.7jaunty i386.deb

and run with:

padsp xvidcap --audio yes --audio_bits 128 --cap_geometry 854x480[+200+200] --fps 30 --quality 100 --file "Su video.mpg"

here a video:

but the program records video of very poor quality, and the audio sounds very bad when one moves with the box, and is not possible use it to make great video tutorials (with FFmpeg yes)

I know that there is other applications like: SimpleScreenRecorder, Vokoscreen-NG, etc but no one is like XvidCap (but FFmpeg is greate)

I am not developer but try to read about what happened and I found that the commands that theveloper used are to ffmpeg on MAC OS X. I think that the solution is change that commands to the commands for ffmpeg on Linux

DEPENDENCES FOR FFMPEGUI

Install some dependences for Ubuntu, Debian:

sudo apt-get install libgtk-3-dev golang ffmpeg

 

INSTALL ui

To install ffmpegui first is necessary to install ui (https://github.com/andlabs/ui), put in terminal:

go get github.com/andlabs/ui/...

then:

INSTALL ffmpegui

Now put in terminal:

go get github.com/raviraa/ffmpegui/...

 

then when is installed

RUN

to launch it:

$HOME/go/bin/ffmpegui

 

ERROR MESSAGE

aappear to me a message that said:

INFO: 20:02:45 mainui.go:83: Starting in GUI mode
panic: OS not supported

pherhaps is necessary change:

MAC OS X ffmpeg option:

FFmpeg Devices Documentation - avfoundation
https://ffmpeg.org/ffmpeg-devices.html#avfoundation

to

Linux ffmpeg option:

FFmpeg Devices Documentation x11grab
https://ffmpeg.org/ffmpeg-devices.html#x11grab

but I don't know how to do that

To Edit the program

This program has been installed in:

/home/youruser/go/src/github.com/raviraa/ffmpegui/

in that place we can edit 

Asking developer for help

I think on write to developer but there is no email in that account: https://github.com/raviraa

At this time I am try to using ffmpeg from terminal to made screencast, but without pause, only stop and if is necessary next have to join some videos a one.

 I do a entry on my blog about (but in spanish):

[Screencast] Grabar pantalla con FFmpeg + seguir cursor + mostrar cursor + grabar rectangulo de 480p
https://facilitarelsoftwarelibre.blogspot.com/2021/03/screencast-ffmpeg-follow-mouse-linux.html

TO RECORD A 480p RECTANGLE + FOLLOW THE MOUSE (MOVE EDGE AT 50px)

The following are instructions to record in a rectangle of 854x480 pixels + follow the mouse, to explain in more detail the places on the screen where we are moving, and the rectangle will only move following the mouse when the pointer reaches within 50 pixels up to the border within the box

ffmpeg -follow_mouse 50 -show_region 1 -video_size 854x480 -r 60 -f x11grab -i :0.0 \
       -f alsa -ac 2 -i default \
       -c:v libx264 -qp 0 -preset ultrafast \
       "$HOME/Rec-$(date '+%Y-%m-%d_%H.%M.%S').mp4"

. . . this feature only works correctly in Linux Operating Systems with FFmpeg 4, example Ubuntu 20.04 Focal that has the version FFmpeg 4.2.4 (https://packages.ubuntu.com/focal/ffmpeg), or Debian 11 Bullseye that has FFmpeg 4.3.2 (https://packages.debian.org/bullseye/ffmpeg) and Linux like MX Linux 21, this or that you use in Ubuntu a PPA or compile from source code one of the versions 4 of FFmpeg.

I made a video:

 

 

Commands to join the videos

At the moment I think that is possible to join the videos with this:

 

First Create a list of all files to convert

for f in *.mp4; do echo "file '$f'" >> mylist.txt; done

then join the files from the list:

ffmpeg -f concat -safe 0 -i mylist.txt -c copy output.mp4

 

 

perhaps you can help to make this idea to run

 

or create a GUI in some other way to get it to work

 

if you do please said me: wachin.id@gmail.com

God Bless You