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import * as ffmpeg from 'fluent-ffmpeg'
import { VideoResolution } from '../../shared/models/videos/video-resolution.enum'
import { CONFIG } from '../initializers'
function getVideoFileHeight (path: string) {
return new Promise<number>((res, rej) => {
ffmpeg.ffprobe(path, (err, metadata) => {
if (err) return rej(err)
const videoStream = metadata.streams.find(s => s.codec_type === 'video')
return res(videoStream.height)
})
})
}
function getDurationFromVideoFile (path: string) {
return new Promise<number>((res, rej) => {
ffmpeg.ffprobe(path, (err, metadata) => {
if (err) return rej(err)
return res(Math.floor(metadata.format.duration))
})
})
}
function generateImageFromVideoFile (fromPath: string, folder: string, imageName: string, size: string) {
const options = {
filename: imageName,
count: 1,
folder
}
if (size !== undefined) {
options['size'] = size
}
return new Promise<string>((res, rej) => {
ffmpeg(fromPath)
.on('error', rej)
.on('end', () => res(imageName))
.thumbnail(options)
})
}
type TranscodeOptions = {
inputPath: string
outputPath: string
resolution?: VideoResolution
}
function transcode (options: TranscodeOptions) {
return new Promise<void>((res, rej) => {
let command = ffmpeg(options.inputPath)
.output(options.outputPath)
.videoCodec('libx264')
.outputOption('-threads ' + CONFIG.TRANSCODING.THREADS)
.outputOption('-movflags faststart')
// .outputOption('-crf 18')
if (options.resolution !== undefined) {
const size = `?x${options.resolution}` // '?x720' for example
command = command.size(size)
}
command.on('error', rej)
.on('end', res)
.run()
})
}
// ---------------------------------------------------------------------------
export {
getVideoFileHeight,
getDurationFromVideoFile,
generateImageFromVideoFile,
transcode
}
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