Verifying a SHA Checksum on a Mac

Print SHA Checksum
shasum -a 256 2020-05-27-raspios-buster-full-armhf.zip

Output:

fdbd6f5b5b7e1fa5e724bd8747c5109801442e9200144d0a1941c9e73c93dd61  2020-05-27-raspios-buster-full-armhf.zip
Save Checksum to File
shasum -a 256 2020-05-27-raspios-buster-full-armhf.zip > hash.sha256
Verify Checksum from File
shasum -c hash.sha256

Output:

2020-05-27-raspios-buster-full-armhf.zip: OK

Raspberry Pi 4 HDMI Capture Work in Progress

HDMI to USB Video Capture Card 1080P: http://ebay.us/Mv0snK (eBay Affiliate)

HDMI to USB Video Capture Card 1080P (Amazon Affiliate)
➡️ Purchase here: https://amzlink.to/az0ERJOIiu3E2
UK: https://amzlink.to/az0Djrn3mt92V
CA: https://amzlink.to/az0XtwYyuS1vE
ES: https://amzlink.to/az0cGAOuYQm1x
FR: https://amzlink.to/az0Ujh0ZxjX0y
IT: https://amzlink.to/az0g9pB8v2rEs
DE: https://amzlink.to/az0GaAubd8C0T
AU: https://amzlink.to/az0sXMG9Cp6IH

CanaKit Raspberry Pi 4 (4GB) Starter Kit (Amazon Affiliate)
➡️ Purchase here: https://amzlink.to/az0ZfrkkOaE2j
UK: https://amzlink.to/az0tldMyYgHkO
CA: https://amzlink.to/az02dRfQRpSbE
ES: https://amzlink.to/az0LjL2QjxrJf (similar)
FR: https://amzlink.to/az03BF7ks0KJJ (similaire)
IT: https://amzlink.to/az0TWmA9d7fFm (simile)
DE: https://amzlink.to/az0cV12rz0zJb (ähnlich)
IN: https://amzlink.to/az0KxgOoOocos
AU: https://amzlink.to/az0cjN4OPfBBq
NL: https://amzlink.to/az0yZHtGePHqS (vergelijkbaar)

FFmpeg Capture Notes: https://trac.ffmpeg.org/wiki/Capture/Webcam

Install v4l
sudo apt install v4l-utils
List Devices
v4l2-ctl --list-devices
List Modes
ffmpeg -f v4l2 -list_formats all -i /dev/video0
List Audio Devices
arecord -l
List PCMs
arecord -L
Display Video from HDMI Capture Card using FFplay
ffplay -f v4l2 -input_format mjpeg -video_size 1920x1080 -framerate 30 -i /dev/video0
Play Audio from HDMI Capture Card using FFplay
ffplay -f alsa -i plughw:CARD=Video,DEV=0
Install MPlayer
sudo apt install mplayer
Display Video from HDMI Capture Card using MPlayer
mplayer tv:// driver=v4l2:width=1920:height:1080:device=/dev/video0:fps=30
Attempt to Record Audio and Video to mp4
ffmpeg -f v4l2 -input_format mjpeg -video_size 1920x1080 -framerate 30 -i /dev/video0 -f alsa -i plughw:CARD=Video,DEV=0 vid.mp4
Attempt to Record Audio and Video to avi
ffmpeg -f v4l2 -input_format mjpeg -video_size 1920x1080 -framerate 30 -i /dev/video0 -f alsa -i plughw:CARD=Video,DEV=0 -codec copy vid.avi
Convert avi to mp4
ffmpeg -i vid.avi vid.mp4