.. | ||
camera.sh | ||
README.md | ||
record-audio-and-video.sh | ||
record-audio.sh | ||
record-video.sh | ||
sync.sh |
First of all, these scripts helped me to record my first video. Here is my youtube channel to see the result.
Scripts to record videos
Both record-audio.sh
and record-video.sh
do exactly what their name is saying.
These are simple ffmpeg calls.
Their unique parameter is the output filename.
Since I use them on OpenBSD the audio driver is sndio and not Alsa or OSS or PulseAudio or whatever.
Recording the camera
I don't record my face from my camera in a separate video stream.
I just display my camera feed in a window thanks to camera.sh
and my whole screen is recorded with record-video.sh.
.
There are two optional parameters: brightness and saturation.
Don't hesitate to tweak a bit this script: there are a few hardcoded ffmpeg parameters, such as a very low quality video size.
Synchronize audio and video
The script sync.sh
is to include in your environment.
It adds a few shell functions, using ffmpeg and mpv to help mixing and synchronizing audio and video.
- stereo2mono: my first error was to record a mono input in stereo, so I had audio only on the left side.
This fixes the issue by removing the superflous empty track.
Side note: since then,
record-audio.sh
was corrected (see-ac 1
option). - please_read: I'm like super lazy. This launches mpv with both video and audio without having to specify both files and the mpv option. Just read the source, the function is obvious.
- avsync: this is the core function to synchronize audio and video.
Usage:
avsync video audio delay output
. - avs: did I mention I'm lazy?
This function is just me not wanting to type all
4
parameters for avsync. Again, read the source code, it's obvious.
Forget about record-audio-and-video.sh
This script probably does work if your computer is powerful enough. That's not the case for mine.
Software
I used ffmpeg
a lot in these scripts.
That's one of the most versatile program you can find, anywhere.
I recommand kdenlive
for both video editing (transitions, effects, inserts...) and for a few audio editing too.
It does help removing audio artifacts.
Learn how to use keyframes
and you'll be ready for crazy productivity in no time.
I also use audacity
to remove background noise, which allows to increase the volume smoothly.
Finally, for creating a thumbnail for my videos, I use krita
.
Don't forget to have fun!