demrec

NodeJS wrapper for SourceVideoRender!

Usage

let DemRec = require('demrec')
let dr = new DemRec('config.ini')

// prepare event log
let Events = Object.keys(DemRec.Events)
dr.on('log', data => {
  console.log(`EVENT: ${Events[data.event]}`)
})

// launch the game
await dr.launch()

// render a demo
await dr.record('cooldemo.dem', {
  ticks: [300, 1800], 
  spec: 'soupcan', // player/steamid to spectate (SourceTV demo only)
  cmd: 'mat_fullbright 1; volume 0.2', // commands to execute before recording
  out: 'soupcan_does_cool_stuff' // output file
}, 'output') // output folder
// result: -> output/soupcan_does_cool_stuff.mp4

// multiple recordings in a single demo supported
await dr.record('Z:/demos/auto-20200724-224342-jump_haze.dem', [
  {
    ticks: [12710, 14067],
    spec: 'STEAM_0:0:443798979',
    out: 'toss_bonus1'
  },
  {
    ticks: [14359, 15936],
    spec: 'STEAM_0:0:443798979',
    out: 'toss_bonus2'
  },
  {
    ticks: [19334, 20723],
    spec: 'STEAM_0:1:50458194',
    cmd: 'spec_mode 5',
    out: 'tom_wallclimbing'
  },
  {
    ticks: [21051, 22219],
    spec: 'STEAM_0:1:50458194'
  }
], 'output')
// results: 
// output/toss_bonus1.mp4, output/toss_bonus2.mp4, 
// output/tom_wallclimbing.mp4, output/out-4.mp4

// close the game
await dr.exit()

FFMPEG configuration

The default configuration in config.ini simply merges the resulting mp4 & wav files into a single mp4.
If you remove the FFMPEG section entirely, output of dr.record will contain both files instead.

You can add additional FFMPEG jobs like this:

[FFMPEG]
-i "%INPUT%.mp4"
-i "%INPUT%.wav"
-c:v copy
-c:a aac
"%NEXT%.mp4"

[FFMPEG]
-i "%PREV%.mp4" # %INPUT% is no longer available at this point
-vf "vignette=angle=0.5"
"%OUT%.mp4"

It is also possible to add custom FFMPEG args during the render. This one can only exist once and input/output args are skipped:

[FFMPEG RECORD] # NO ERROR HANDLING FOR THIS ONE!
-crf 20
-vf "vignette=angle=0.5"