Pietro pietrop

## ffmpeg_mkv_mp4_conversion.md

      
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                pietrop
                / ffmpeg_mkv_mp4_conversion.md
            
            
              Created
              December 12, 2019 17:31
                — forked from jamesmacwhite/ffmpeg_mkv_mp4_conversion.md
            
              
                Easy way to convert MKV to MP4 with ffmpeg
              
          
    Converting mkv to mp4 with ffmpeg

Essentially just copy the existing video and audio stream as is into a new container, no funny business!

The easiest way to "convert" MKV to MP4, is to copy the existing video and audio streams and place them into a new container. This avoids any encoding task and hence no quality will be lost, it is also a fairly quick process and requires very little CPU power. The main factor is disk read/write speed.
With ffmpeg this can be achieved with -c copy. Older examples may use -vcodec copy -acodec copy which does the same thing.
These examples assume ffmpeg is in your PATH. If not just substitute with the full path to your ffmpeg binary.
Single file conversion example


## scrape-c-span-captions.js
/**
* To Scrape captions text from C-Span website
*
* Example page
* https://www.c-span.org/video/?465757-1/federal-reserve-chair-powell-announces-interest-rate-cut-signals-pause
*/
// possible function to clean up text
// https://github.com/voxmedia/c-span_opened_captions_server/blob/master/index.js#L61
function formatText(str) {
  var ret = str.toLowerCase().replace("\r\n", ' ') // remove random line breaks

## dpe-add-words-to-paragraphs.sj
// some DPE transcript
const transcript = {
  "words": [
    {
      "id": 0,
      "start": 0.24,
      "end": 0.56,
      "text": "Wall"
    },
    {

## dpe-add-words-to-paragraphs.sj
// some DPE transcript
const transcript = {
  "words": [
    {
      "id": 0,
      "start": 0.24,
      "end": 0.56,
      "text": "Wall"
    },
    {

## interpolateWordsTimesFromSentence.js
/*
* originally from https://github.com/pietrop/srtParserComposer/blob/master/srtJsonToWordLinesJson.js()
* refactored
* Module to convert srtJson to nested array of line word objects.
Line to word timecode accuracty.
Original code modified from Popcorn srt parser.
https://github.com/mozilla/popcorn-js/blob/master/parsers/parserSRT/popcorn.parserSRT.js

input example
```js

## pull_request_template.md

      
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                pietrop
                / pull_request_template.md
            
            
              Created
              October 29, 2018 10:26
                — forked from iaincollins/pull_request_template.md
            
              
                Pull Request Template
              
          
    Summary

A sentence describing the reason for the changes in this pull request.
Description

A few sentences / bullet points describing the goals of this change and the implementation.
Link to Issue


## adr_template.md

      
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                pietrop
                / adr_template.md
            
            
              Created
              October 29, 2018 10:25
                — forked from iaincollins/adr_template.md
            
              
                ADR Template
              
          
    [short title of solved problem and solution]


Status: [accepted | superseded by ADR-0005 | deprecated | …] 
Deciders: [list everyone involved in the decision] 
Date: [YYYY-MM-DD when the decision was last updated] 

Technical Story: [description | ticket/issue URL] 
Context and Problem Statement


## .travis.yml # Linux only
# https://github.com/OpenNewsLabs/autoEdit_2/issues/36

language: node_js
node_js:
  - "7"

os: linux
dist: trusty
sudo: required

## .travis.yml #mac + linux
# https://github.com/OpenNewsLabs/autoEdit_2/issues/36

language: node_js
node_js:
  - "7"

os:
  - linux
  - osx

## .travis.yml #mac only
# originally from https://github.com/OpenNewsLabs/autoEdit_2/issues/36 see PR for setup instructions with travis github token etc..
# https://github.com/OpenNewsLabs/autoEdit_2/blob/master/package.json
# need to set electron builder mac target to be only zip file, to skip dmg
# https://github.com/OpenNewsLabs/autoEdit_2/blob/master/package.json#L56
# dmg seems to take to long and hang the process

language: node_js
node_js:
  - "10"
	/**
	* To Scrape captions text from C-Span website
	*
	* Example page
	* https://www.c-span.org/video/?465757-1/federal-reserve-chair-powell-announces-interest-rate-cut-signals-pause
	*/
	// possible function to clean up text
	// https://github.com/voxmedia/c-span_opened_captions_server/blob/master/index.js#L61
	function formatText(str) {
	var ret = str.toLowerCase().replace("\r\n", ' ') // remove random line breaks
	// some DPE transcript
	const transcript = {
	"words": [
	{
	"id": 0,
	"start": 0.24,
	"end": 0.56,
	"text": "Wall"
	},
	{
	/*
	* originally from https://github.com/pietrop/srtParserComposer/blob/master/srtJsonToWordLinesJson.js()
	* refactored
	* Module to convert srtJson to nested array of line word objects.
	Line to word timecode accuracty.
	Original code modified from Popcorn srt parser.
	https://github.com/mozilla/popcorn-js/blob/master/parsers/parserSRT/popcorn.parserSRT.js

	input example
	```js
	# https://github.com/OpenNewsLabs/autoEdit_2/issues/36

	language: node_js
	node_js:
	- "7"

	os: linux
	dist: trusty
	sudo: required
	# originally from https://github.com/OpenNewsLabs/autoEdit_2/issues/36 see PR for setup instructions with travis github token etc..
	# https://github.com/OpenNewsLabs/autoEdit_2/blob/master/package.json
	# need to set electron builder mac target to be only zip file, to skip dmg
	# https://github.com/OpenNewsLabs/autoEdit_2/blob/master/package.json#L56
	# dmg seems to take to long and hang the process

	language: node_js
	node_js:
	- "10"