DusanBrejka

42000a	1	Baseline
42e00a	1	ConstrainedBaseline
640c0a	1	ConstrainedHigh
64000a	1	High
4d000a	1	Main
42000b	1.1	Baseline
42e00b	1.1	ConstrainedBaseline
640c0b	1.1	ConstrainedHigh
64000b	1.1	High
4d000b	1.1	Main

DusanBrejka

// INCOMPLETE

// This command will give you list of available FFMPEG formats and their default Mime types
// ffmpeg -formats -hide_banner | tail -n +5 | cut -c5- | cut -d' ' -f1 | xargs -i{} ffmpeg -hide_banner -h demuxer={} | pcregrep -o2 -o4 -M  '(Muxer (\w+) )|(Mime type:( .*).)'
// And then parse the output with regex to JSON format in JavaScript for example:
// str.match(/(.*)\n (.*)/gm).map(m => `"${m.replace(/\n /, '": "')}"`).join(',\n');

// Combine the output with MDN - Common MIME types
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types/Common_types
// And with IANA:

DusanBrejka

// This can generated by executing the command below:
// ffmpeg -muxers -hide_banner | tail -n +5 | cut -d' ' -f4 | xargs -i{} ffmpeg -hide_banner -h muxer={} | pcregrep -o2 -o4 -M  '(Muxer (\w+) )|(Mime type:( .*).)'

// And then parsing the output with regex to JSON format in JavaScript for example:
// str.match(/(.*)\n (.*)/gm).map(m => `"${m.replace(/\n /, '": "')}"`).join(',\n');

const muxer2mime = {
 "ac3": "audio/x-ac3",
 "adts": "audio/aac",
 "aiff": "audio/aiff",

DusanBrejka

These are notes while researching a way to convert a browser/website to a stream. This could be used for Facebook Live or for webrecording. TL'DR:

• I started with Phantomjs - but that didn't support the html5 video tag
• SlimerJS supports it, but there is no way to record audio directly (though this might come from desktop audio)
• So I moved to research ffmpeg/X11/XVFB to record it with linux which works
• But ffmpeg has no easy way to mix streams/overlays to I moved on to OBS with overlay browser support
• I started researching options OBS in docker and it needed best a GPU , so I move to nvidia-docker
• And so came across building game servers on EC2/AWS using GPUs and managed to run OBS inside of GPU g2x.large machine
• I tried streaming to twich , which works great and managed to restream 4K 60FPS youtube on an AWS instance
• Remote control works through OBS-Remote but OBS has kinda limit in types of features

DusanBrejka

/*
  As at the time of writing this Fluent ffmpeg-API for node.js has not been updated 
  for years and still does not support custom FFMPEG attributes, the only solutions
  are either forking it or resorting to hacks like this one...

  Please use it only when fluent does not support more complex arguments 
  (like generating multi-rendition HLS with all playlists in a single command)
  
  NOTE: this does not support 'progress' event, but you can do it easily by
  parsing 'stderr' event with extractProgress method from fluent-ffmpeg/lib/options.js

DusanBrejka

# MySQL 5.7.8 or later required
# https://dev.mysql.com/doc/refman/5.7/en/json.html
# Do not use it unless you know exactly what you're doing...
# For noobs - this function will not split your string to multiple rows


DELIMITER //
CREATE DEFINER=`root`@`localhost` FUNCTION `STR_SPLIT`(`delimiter` VARCHAR(255), `input` LONGTEXT) RETURNS text CHARSET utf8
    DETERMINISTIC
BEGIN

DusanBrejka

javascript

ES6ValidationInspection
JSAccessibilityCheckInspection
JSBitwiseOperatorUsageInspection
JSCheckFunctionSignaturesInspection
JSClosureCompilerSyntaxInspection
JSCommentMatchesSignatureInspection
JSComparisonWithNaNInspection
JSConsecutiveCommasInArrayLiteralInspection

DusanBrejka

dispatch:beforeDispatchLoop
dispatch:beforeDispatch
dispatch:beforeNotFoundAction
dispatch:beforeExecuteRoute
dispatch:afterInitialize
dispatch:afterExecuteRoute
dispatch:afterDispatch
dispatch:afterDispatchLoop
dispatch:beforeException