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import { FilterSpecification } from 'fluent-ffmpeg'
import { FFmpegCommandWrapper, FFmpegCommandWrapperOptions } from './ffmpeg-command-wrapper'
import { presetVOD } from './shared/presets'
import { ffprobePromise, getVideoStreamDimensionsInfo, getVideoStreamDuration, getVideoStreamFPS, hasAudioStream } from './ffprobe'
export class FFmpegEdition {
private readonly commandWrapper: FFmpegCommandWrapper
constructor (options: FFmpegCommandWrapperOptions) {
this.commandWrapper = new FFmpegCommandWrapper(options)
}
async cutVideo (options: {
inputPath: string
outputPath: string
start?: number
end?: number
}) {
const { inputPath, outputPath } = options
const mainProbe = await ffprobePromise(inputPath)
const fps = await getVideoStreamFPS(inputPath, mainProbe)
const { resolution } = await getVideoStreamDimensionsInfo(inputPath, mainProbe)
const command = this.commandWrapper.buildCommand(inputPath)
.output(outputPath)
await presetVOD({
commandWrapper: this.commandWrapper,
input: inputPath,
resolution,
fps,
canCopyAudio: false,
canCopyVideo: false
})
if (options.start) {
command.outputOption('-ss ' + options.start)
}
if (options.end) {
command.outputOption('-to ' + options.end)
}
await this.commandWrapper.runCommand()
}
async addWatermark (options: {
inputPath: string
watermarkPath: string
outputPath: string
videoFilters: {
watermarkSizeRatio: number
horitonzalMarginRatio: number
verticalMarginRatio: number
}
}) {
const { watermarkPath, inputPath, outputPath, videoFilters } = options
const videoProbe = await ffprobePromise(inputPath)
const fps = await getVideoStreamFPS(inputPath, videoProbe)
const { resolution } = await getVideoStreamDimensionsInfo(inputPath, videoProbe)
const command = this.commandWrapper.buildCommand(inputPath)
.output(outputPath)
command.input(watermarkPath)
await presetVOD({
commandWrapper: this.commandWrapper,
input: inputPath,
resolution,
fps,
canCopyAudio: true,
canCopyVideo: false
})
const complexFilter: FilterSpecification[] = [
// Scale watermark
{
inputs: [ '[1]', '[0]' ],
filter: 'scale2ref',
options: {
w: 'oh*mdar',
h: `ih*${videoFilters.watermarkSizeRatio}`
},
outputs: [ '[watermark]', '[video]' ]
},
{
inputs: [ '[video]', '[watermark]' ],
filter: 'overlay',
options: {
x: `main_w - overlay_w - (main_h * ${videoFilters.horitonzalMarginRatio})`,
y: `main_h * ${videoFilters.verticalMarginRatio}`
}
}
]
command.complexFilter(complexFilter)
await this.commandWrapper.runCommand()
}
async addIntroOutro (options: {
inputPath: string
introOutroPath: string
outputPath: string
type: 'intro' | 'outro'
}) {
const { introOutroPath, inputPath, outputPath, type } = options
const mainProbe = await ffprobePromise(inputPath)
const fps = await getVideoStreamFPS(inputPath, mainProbe)
const { resolution } = await getVideoStreamDimensionsInfo(inputPath, mainProbe)
const mainHasAudio = await hasAudioStream(inputPath, mainProbe)
const introOutroProbe = await ffprobePromise(introOutroPath)
const introOutroHasAudio = await hasAudioStream(introOutroPath, introOutroProbe)
const command = this.commandWrapper.buildCommand(inputPath)
.output(outputPath)
command.input(introOutroPath)
if (!introOutroHasAudio && mainHasAudio) {
const duration = await getVideoStreamDuration(introOutroPath, introOutroProbe)
command.input('anullsrc')
command.withInputFormat('lavfi')
command.withInputOption('-t ' + duration)
}
await presetVOD({
commandWrapper: this.commandWrapper,
input: inputPath,
resolution,
fps,
canCopyAudio: false,
canCopyVideo: false
})
// Add black background to correctly scale intro/outro with padding
const complexFilter: FilterSpecification[] = [
{
inputs: [ '1', '0' ],
filter: 'scale2ref',
options: {
w: 'iw',
h: `ih`
},
outputs: [ 'intro-outro', 'main' ]
},
{
inputs: [ 'intro-outro', 'main' ],
filter: 'scale2ref',
options: {
w: 'iw',
h: `ih`
},
outputs: [ 'to-scale', 'main' ]
},
{
inputs: 'to-scale',
filter: 'drawbox',
options: {
t: 'fill'
},
outputs: [ 'to-scale-bg' ]
},
{
inputs: [ '1', 'to-scale-bg' ],
filter: 'scale2ref',
options: {
w: 'iw',
h: 'ih',
force_original_aspect_ratio: 'decrease',
flags: 'spline'
},
outputs: [ 'to-scale', 'to-scale-bg' ]
},
{
inputs: [ 'to-scale-bg', 'to-scale' ],
filter: 'overlay',
options: {
x: '(main_w - overlay_w)/2',
y: '(main_h - overlay_h)/2'
},
outputs: 'intro-outro-resized'
}
]
const concatFilter = {
inputs: [],
filter: 'concat',
options: {
n: 2,
v: 1,
unsafe: 1
},
outputs: [ 'v' ]
}
const introOutroFilterInputs = [ 'intro-outro-resized' ]
const mainFilterInputs = [ 'main' ]
if (mainHasAudio) {
mainFilterInputs.push('0:a')
if (introOutroHasAudio) {
introOutroFilterInputs.push('1:a')
} else {
// Silent input
introOutroFilterInputs.push('2:a')
}
}
if (type === 'intro') {
concatFilter.inputs = [ ...introOutroFilterInputs, ...mainFilterInputs ]
} else {
concatFilter.inputs = [ ...mainFilterInputs, ...introOutroFilterInputs ]
}
if (mainHasAudio) {
concatFilter.options['a'] = 1
concatFilter.outputs.push('a')
command.outputOption('-map [a]')
}
command.outputOption('-map [v]')
complexFilter.push(concatFilter)
command.complexFilter(complexFilter)
await this.commandWrapper.runCommand()
}
}
|
