RickMakes

Quick and Easy Roomba 5.0Ah Battery Replacement (500, 600, 700, 800, 900 series)

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Firstpower 5.0Ah 14.4V Compatible with Roomba Battery Replacement R3 Battery 500 600 700 800 900 Series 510 530 531 532 535 536 540 550 552 560 570 580 595 620 650 660 760 770 780 790 800 870 (Amazon Affiliate)
US: https://amzlink.to/az0IixP09bHyb

Roomba 600 Series Upgrade, Maintenance and Repair: https://youtu.be/RS1z1BAymCY

Lithium Battery (Amazon Affiliate)
US: https://amzlink.to/az0WwBXRwnCuX

Capturing Two HDMI Streams at Once on a Raspberry Pi 4

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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

4K 1×2 HDMI Splitter by OREI – 1 Port to 2 HDMI Display Duplicate/Mirror – Powered Splitter Ver 1.4 Certified for Full HD 1080P High Resolution & 3D Support (One Input To Two Outputs) – USB Powered (Amazon Affiliate)
➡️ Purchase here: https://amzlink.to/az0IifTRxpWV4
UK: https://amzlink.to/az0vckNjHBm3S (similar)
CA: https://amzlink.to/az0POyV1yl3K2
ES: https://amzlink.to/az06LDrB5CUss (similar)
FR: https://amzlink.to/az0A0CTFFKRBl (similaire)
IT: https://amzlink.to/az08YIsUx3R5z (simile)
DE: https://amzlink.to/az0ptEeF1iTGs (ähnlich)
IN: https://amzlink.to/az0drcy7laPgr
AU: https://amzlink.to/az04Wr4VokOWy

This video builds upon my previous video “Cheap HDMI USB Capture Card on a Raspberry Pi 4”: https://youtu.be/O1NqziPRFVQ

List Devices

v4l2-ctl --list-devices

List PulseAudio Sources

ffmpeg -sources pulse

Record Two Streams at Once

ffmpeg \
-f v4l2 -thread_queue_size 1024 -input_format mjpeg -video_size 1920x1080 -framerate 30 -i /dev/video0 \
-f pulse -thread_queue_size 1024 -i alsa_input.usb-MACROSILICON_USB_Video-02.analog-stereo \
-f v4l2 -thread_queue_size 1024 -input_format mjpeg -video_size 1920x1080 -framerate 30 -i /dev/video2 \
-f pulse -thread_queue_size 1024 -i alsa_input.usb-MACROSILICON_USB_Video-02.analog-stereo.2 \
-codec copy -copytb 1 \
-map 0:0 -map 1:0 stream1.avi \
-codec copy -copytb 1 \
-map 2:0 -map 3:0 stream2.avi

Cheap HDMI USB Capture Card on a Raspberry Pi 4

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

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 PulseAudio Sources

ffmpeg -sources pulse

Display Video from HDMI Capture Card using FFplay (720p 60fps)

ffplay -f v4l2 -input_format mjpeg -video_size 1280x720 -framerate 60 -i /dev/video0

Display Video from HDMI Capture Card using FFplay (1080p 30fps)

ffplay -f v4l2 -input_format mjpeg -video_size 1920x1080 -framerate 30 -i /dev/video0

Play Audio from HDMI Capture Card using FFplay

ffplay -f pulse -i default

Capture Audio and Video to AVI File (720p 60fps, no re-encoding)

ffmpeg -f v4l2 -thread_queue_size 1024 -input_format mjpeg -video_size 1280x720 -framerate 60 -i /dev/video0 -f pulse -thread_queue_size 1024 -i default -codec copy vid_720p_60.avi

Capture Audio and Video to AVI File (1080p 30fps, no re-encoding)

ffmpeg -f v4l2 -thread_queue_size 1024 -input_format mjpeg -video_size 1920x1080 -framerate 30 -i /dev/video0 -f pulse -thread_queue_size 1024 -i default -codec copy vid_1080p_30.avi

Convert avi to mp4 (hardware encoding)

ffmpeg -i vid_720p_60.avi -vcodec h264_omx -acodec aac -b:v 9500k -pix_fmt yuv420p vid.mp4

Convert avi to mp4 (software encoding)

ffmpeg -i vid_720p_60.avi -vcodec libx264 -acodec aac -b:v 9500k -pix_fmt yuv420p vid.mp4

Play mp4 with Hardware Decoding

omxplayer vid.mp4