Linux command sum numbers in a file
Example we have file stream.m3u8 with content How to calculate sum of duration of all segments
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Javascript: convert ArrayBuffer to JSON and otherwise
ArrayBuffer to Array: Now you can JSON encode with Array JSON decode to Array: Array to ArrayBuffer:
Nodejs: create signature request header for AWS API
Step 1: Install package sign-aws-requests npm i sign-aws-requests Step 2: example code Now we have new body string, header Authorization and header X-Amz-Date
AWS REST API mediaconvert: example convert mp4 to HLS
Step 1: Create IAM user Create IAM user for AWS We get access Key Id and secret Access Key Step 2: create role AWS IAM:…
AWS IAM: create role for mediaconvert
Step 1: IAM > Roles > Create role Custom trust policy: Step 2: Choose policy, example: s3-and-mediaconvert Step 3: Fill fields Role name and Description…
AWS error: You must use the subscription API to subscribe your account to the service before using this operation
AWS error: Solution to fix: Step 1: Install aws-cli Step 2: configure Step 3: Get Endpoint Now you must use API with this endpoint
Create IAM user for AWS
Step 1: Go to page Users: https://us-east-1.console.aws.amazon.com/iamv2/home?region=us-east-1#/users Click button Add Users Step 2: Step 3: Example we need set permissions for S3 and Mediaconvert We…
Windows: how to install tesseract
Step 1: install Cygwin Read this article: http://tutorialspots.com/how-to-install-ssh-daemon-on-windows-2954.html Step 2: install apt-cyg Read this article: http://tutorialspots.com/how-to-add-packages-after-install-cygwin-3237.html Step 3: install tesseract List all tesseract packages: https://cygwin.com/cgi-bin2/package-grep.cgi?grep=tesseract&arch=x86_64…
Windows 7 fix error: Windows cannot verify the digital signature for the drivers required for this device
Windows 7 fix error: Step 1: Permanently disabling driver signature enforcement 1a. Press Windows + R, type “command prompt” in the dialogue box, right-click on…
How to get all HTML entities
Source: From https://www.w3schools.com/charsets/ref_utf_basic_latin.asp Click Next To: (Skip some pages don’t contains entities) https://www.w3schools.com/charsets/ref_utf_symbols.asp Read more: How to download Javascript data as file on the client…