72 lines
3.3 KiB
Markdown
72 lines
3.3 KiB
Markdown
First of all, these scripts helped me to record my first video.
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Here is my [youtube channel][beautemusculation] to see the result.
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# Scripts to record videos
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Both `record-audio.sh` and `record-video.sh` do exactly what their name is saying.
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These are simple ffmpeg calls.
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Their unique parameter is the output filename.
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Since I use them on OpenBSD the audio driver is sndio and not Alsa or OSS or PulseAudio or whatever.
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# Recording the camera
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I don't record my face from my camera in a separate video stream.
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I just display my camera feed in a window thanks to `camera.sh` and my whole screen is recorded with `record-video.sh.`.
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There are two optional parameters: brightness and saturation.
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Don't hesitate to tweak a bit this script: there are a few hardcoded ffmpeg parameters, such as a very low quality video size.
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# Synchronize audio and video
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The script `sync.sh` is to include in your environment.
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It adds a few shell functions, using ffmpeg and mpv to help mixing and synchronizing audio and video.
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- stereo2mono: my first error was to record a mono input in stereo, so I had audio only on the left side.
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This fixes the issue by removing the superflous empty track.
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Side note: since then, `record-audio.sh` was corrected (see `-ac 1` option).
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- please_read: I'm like super lazy.
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This launches mpv with both video and audio without having to specify both files and the mpv option.
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Just read the source, the function is obvious.
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- avsync: this is the core function to synchronize audio and video.
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Usage: `avsync video audio delay output`.
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- avs: did I mention I'm lazy?
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This function is just me not wanting to type all `4` parameters for avsync.
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Again, read the source code, it's obvious.
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# Forget about record-audio-and-video.sh
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This script _probably_ does work if your computer is powerful enough.
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That's not the case for mine.
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# Software
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I used `ffmpeg` a lot in these scripts.
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That's one of the most versatile program you can find, anywhere.
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I recommand `kdenlive` for both video editing (transitions, effects, inserts...) and for a few audio editing too.
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It does help removing audio artifacts.
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Learn how to use `keyframes` and you'll be ready for crazy productivity in no time.
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I also use `audacity` to remove background noise, which allows to increase the volume smoothly.
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Finally, for creating a thumbnail for my videos, I use `krita`.
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# Hardware
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About any low-end camera will do the job.
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Don't get too crazy, 50 euros is enough.
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Cheap cameras allow you to stream with low video quality, which is great for recording directly on your computer.
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Since you probably don't need to have your face in fullscreen, the low quality is not a problem.
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If you want a good video quality, either record with your phone or with the camera but without streaming it on your computer (quality isn't the same).
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I watched probably dozen of hours of people talking and showing the quality of their cheap cameras, and finally I only use a ridiculously low quality... which is perfectly fine for the job!
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Also, if you really want to improve the quality of the image, be sure to have enough light.
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Low-end cameras aren't great with low lights setups (as I use, but fuck it I don't even care at this point).
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Don't forget to have fun!
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[beautemusculation]: https://www.youtube.com/channel/UC7nYol-RiCxMV7Tzg_jOV4w/featured
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