FFmpeg: Extract Video/Remove Audio from a Video File

FFmpeg notes (including FFmpeg install): https://www.rickmakes.com/ffmpeg-notes/

FFmpeg playlist: https://www.youtube.com/playlist?list=PLErU2HjQZ_ZOPDZ71Khzt5PX4X4j6flkg

View Video Settings
ffprobe train_whistle.mp4
Extract Video/Remove Audio
ffmpeg -i train_whistle.mp4 -vcodec copy -an train_whistle_no_audio.mp4

FFmpeg: Add Silent Audio Track to a Video File

FFmpeg notes (including FFmpeg install): https://www.rickmakes.com/ffmpeg-notes/

FFmpeg playlist: https://www.youtube.com/playlist?list=PLErU2HjQZ_ZOPDZ71Khzt5PX4X4j6flkg

View Video Settings
ffprobe video_without_audio.mp4
Add Silence to Video File
ffmpeg -i video_without_audio.mp4 -f lavfi -i anullsrc -vcodec copy -acodec aac -shortest video_with_silence.mp4

Mac: Encrypted vs Unencrypted Flash Drive Benchmark

Encrypting a Flash Drive/SD Card on a Mac using Disk Utility: https://youtu.be/ZTfbNh8isx8

Samsung BAR Plus USB 3.1 Flash Drive 128GB - 300MB/s (MUF-128BE3/AM) - Champagne Silver (Amazon Affiliate)
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Mac Playlist: https://www.youtube.com/playlist?list=PLErU2HjQZ_ZPxkWT9rjYcF–ZSivANTkb

Raspberry PI Standalone Wireless SDR Server

In this video, I turn a Soapy Remote SDR (software defined radio) server on a Raspberry Pi 4 with an RTL-SDR Blog V3 USB dongle into a standalone wifi access point so you can access remote SDR without an internet connection.

Raspberry PI Remote SDR Server with Soapy Remote: https://youtu.be/DJnRDu2_amU

CanaKit Raspberry Pi 4 (4GB) Starter Kit (Amazon Affiliate)
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FR: https://amzn.to/3cvIZrs (similaire)
IT: https://amzn.to/2Ar74Sj (simile)
DE: https://amzn.to/2AqfWHQ (ähnlich)
IN: https://amzn.to/3ey6fWj
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RTL-SDR Blog V3 R820T2 (Amazon Affiliate)
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CA: https://amzn.to/3e3Ln8K (dongle only)
UK: https://amzn.to/2AuUdin
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Software Defined Radio Playlist: https://www.youtube.com/playlist?list=PLErU2HjQZ_ZPHRD_m-N5pzrPPdkXa8Fsf

Assign Static IP to wlan0
sudo nano /etc/dhcpcd.conf
interface wlan0
     static ip_address=192.168.1.1/24
     nohook wpa_supplicant
Commit Changes to dhcpcd
sudo systemctl daemon-reload
sudo systemctl restart dhcpcd
Install dnsmasq (DNS and DHCP Server)
sudo apt install dnsmasq
Make Backup of dnsmasq.conf
sudo mv /etc/dnsmasq.conf /etc/dnsmasq.conf.orig
Edit dnsmasq.conf
sudo nano /etc/dnsmasq.conf
interface=wlan0
dhcp-range=192.168.1.2,192.168.1.254,255.255.255.0,24h
address=/#/192.168.1.1
Install hostapd (WiFi Access Point Software)
sudo apt install hostapd
Edit hostapd.conf
sudo nano /etc/hostapd/hostapd.conf
Config for Password Protected WiFi Access Point
interface=wlan0
driver=nl80211
ssid=sdr
hw_mode=g
channel=6
wmm_enabled=0
macaddr_acl=0
auth_algs=1
wpa=2
wpa_key_mgmt=WPA-PSK
rsn_pairwise=CCMP
wpa_passphrase=password
Config for Open WiFi Access Point
interface=wlan0
driver=nl80211
ssid=sdr
hw_mode=g
channel=6
Additional Online Resources for WiFi Setup

https://www.raspberrypi.org/documentation/configuration/wireless/access-point-routed.md

https://w1.fi/cgit/hostap/plain/hostapd/hostapd.conf

Enable WiFi Setup
sudo nano /etc/default/hostapd
DAEMON_CONF="/etc/hostapd/hostapd.conf"
Commit Changes to hostapd and dnsmasq
sudo systemctl daemon-reload
sudo systemctl unmask hostapd
sudo systemctl enable hostapd dnsmasq
sudo systemctl start hostapd dnsmasq
Enable Read Only System (Optional)
sudo raspi-config

Advanced Options > Overlay FS

Choose “Yes” to enable overlay file system and/or “Yes” to write protect boot partition.