Brian R dudewheresmycode

## FFMPEG Scene Detection.md

      
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                dudewheresmycode
                / FFMPEG Scene Detection.md
            
            
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              March 4, 2024 10:06
            
              
                Notes on scene detection with FFMPEG
              
          
    Basic ffmpeg scene detection:
ffmpeg -i input.flv -filter:v "select='gt(scene,0.4)',showinfo" -f null -
scene (video only)
value between 0 and 1 to indicate a new scene; a low value reflects a low probability for the current frame to introduce a new scene, while a higher value means the current frame is more likely to be one (see the example below)
https://ffmpeg.org/ffmpeg-filters.html#select_002c-aselect
Set the scene change detection threshold as a percentage of maximum change on the luma plane. Good values are in the [8.0, 14.0] range. Scene change detection is only relevant in case combmatch=sc. The range for scthresh is [0.0, 100.0].

  
## install_node_20_rpi4.sh
#!/bin/bash

wget "https://nodejs.org/dist/v20.9.0/node-v20.9.0-linux-arm64.tar.xz"
tar -xf node-v20.9.0-linux-arm64.tar.xz
cd node-v20.9.0-linux-arm64
sudo cp -R bin include lib share /usr/local/

node -v
npm -v

## Debian-on-Beelink-U57.md

      
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                dudewheresmycode
                / Debian-on-Beelink-U57.md
            
            
              Last active
              September 13, 2023 04:06
            
          
    Some notes on getting Debian 10 (stable) installed and running on the Beelink U57 Mini PC with Intel Core i5-5257u Processor.
Install Debian

Create a bootable USB Flash drive of the Debian 10 netinst ISO using Etcher.

Download ISO from Debian: https://www.debian.org/distrib/netinst
Flash to SD Card using Balena Etcher https://www.balena.io/etcher/
Connect ethernet cable to Beelink


Note: The firmware needed to use the Beelink's onboard Intel Wifi is proprietary, and is not included with the default install of Debian. If you don't have the option of a wired LAN connection you can use an "unofficial" Debian CD image, that includes the proprietary (non-free) firmware. (https://cdimage.debian.org/cdimage/unofficial/non-free/cd-including-firmware/) See the below section on installing the firmware later on.


Immediately after startup press the Del key to enter the BIOS.


## package.sh
#!/bin/bash

packager \
'in=./tmp/output_540p.mp4,stream=video,init_segment=./tmp/output/video_3000_0/video_init.mp4,segment_template=./tmp/output/video_3000_0/video_$Number$.m4s' \
'in=./tmp/output_720p.mp4,stream=video,init_segment=./tmp/output/video_1700_1/video_init.mp4,segment_template=./tmp/output/video_1700_1/video_$Number$.m4s' \
'in=./tmp/output_1080p.mp4,stream=video,init_segment=./tmp/output/video_1200_2/video_init.mp4,segment_template=./tmp/output/video_1200_2/video_$Number$.m4s' \
'in=./tmp/output_audio_128.mp4,stream=audio,language=en,roles=main,hls_name=main_en_2,init_segment=./tmp/output/audio_96_2/audio_init.mp4,segment_template=./tmp/output/audio_96_2/audio_$Number$.m4s' \
'in=./tmp/output_audio_196.mp4,stream=audio,language=en,roles=main,hls_name=main_en_3,init_segment=./tmp/output/audio_64_3/audio_init.mp4,segment_template=./tmp/output/audio_64_3/audio_$Number$.m4s' \
--fragment_duration 6 \
--segment_duration 6 \

## generate_iframes_list.sh
#!/bin/bash

ffprobe \
-v error \
-select_streams v \
-show_entries frame=pict_type,pts_time \
-of csv=p=0 \
-skip_frame nokey \
$INPUT_FILE > iframes.txt

## ical-create-download-javascript
<!DOCTYPE html>
<html lang="en">
 <head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title></title>
 </head>
 <body>


## install ffmpeg on Raspberry Pi.md

      
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                dudewheresmycode
                / install ffmpeg on Raspberry Pi.md
            
            
              Last active
              December 22, 2022 09:37
            
          
    Install x264

cd ~
git clone git://git.videolan.org/x264
cd x264
./configure --host=arm-unknown-linux-gnueabi --enable-static --disable-opencl
make -j4
sudo make install


## example-ffmpeg-commands.md

      
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                dudewheresmycode
                / example-ffmpeg-commands.md
            
            
              Created
              August 18, 2022 20:42
            
          
    Generate 2min of colorbars and audio

ffmpeg \
-f lavfi -i "sine=frequency=1000:duration=120" \
-f lavfi \
-i testsrc=duration=5:size=1280x720:rate=24 \
-t 120 \
-map 0:0 \
-map 1:0 \


## deploy_to_roku.sh
#!/bin/bash

BUILD_ID=$(date +"%s")

SRC_DIR="MyApp"
ZIP_FILE="dist/devbuild_$BUILD_ID.zip"
ROKU_URL="http://192.168.1.167"
ROKU_DEV_USER="rokudev"
ROKU_DEV_PW="******"

## generate-live-stream.sh
#!/bin/sh

ffmpeg \
-i "http://relay.publicdomainradio.org/classical.mp3" \
-f lavfi \
-re \
-i testsrc=duration=120:size=1280x720:rate=24 \
-map 0:0 \
-map 1:0 \
-c:v libx264 \
	#!/bin/bash

	wget "https://nodejs.org/dist/v20.9.0/node-v20.9.0-linux-arm64.tar.xz"
	tar -xf node-v20.9.0-linux-arm64.tar.xz
	cd node-v20.9.0-linux-arm64
	sudo cp -R bin include lib share /usr/local/

	node -v
	npm -v
	#!/bin/bash

	packager \
	'in=./tmp/output_540p.mp4,stream=video,init_segment=./tmp/output/video_3000_0/video_init.mp4,segment_template=./tmp/output/video_3000_0/video_$Number$.m4s' \
	'in=./tmp/output_720p.mp4,stream=video,init_segment=./tmp/output/video_1700_1/video_init.mp4,segment_template=./tmp/output/video_1700_1/video_$Number$.m4s' \
	'in=./tmp/output_1080p.mp4,stream=video,init_segment=./tmp/output/video_1200_2/video_init.mp4,segment_template=./tmp/output/video_1200_2/video_$Number$.m4s' \
	'in=./tmp/output_audio_128.mp4,stream=audio,language=en,roles=main,hls_name=main_en_2,init_segment=./tmp/output/audio_96_2/audio_init.mp4,segment_template=./tmp/output/audio_96_2/audio_$Number$.m4s' \
	'in=./tmp/output_audio_196.mp4,stream=audio,language=en,roles=main,hls_name=main_en_3,init_segment=./tmp/output/audio_64_3/audio_init.mp4,segment_template=./tmp/output/audio_64_3/audio_$Number$.m4s' \
	--fragment_duration 6 \
	--segment_duration 6 \
	#!/bin/bash

	ffprobe \
	-v error \
	-select_streams v \
	-show_entries frame=pict_type,pts_time \
	-of csv=p=0 \
	-skip_frame nokey \
	$INPUT_FILE > iframes.txt
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title></title>
	</head>
	<body>
	#!/bin/bash

	BUILD_ID=$(date +"%s")

	SRC_DIR="MyApp"
	ZIP_FILE="dist/devbuild_$BUILD_ID.zip"
	ROKU_URL="http://192.168.1.167"
	ROKU_DEV_USER="rokudev"
	ROKU_DEV_PW="******"
	#!/bin/sh

	ffmpeg \
	-i "http://relay.publicdomainradio.org/classical.mp3" \
	-f lavfi \
	-re \
	-i testsrc=duration=120:size=1280x720:rate=24 \
	-map 0:0 \
	-map 1:0 \
	-c:v libx264 \