121 lines
3.1 KiB
TypeScript
121 lines
3.1 KiB
TypeScript
import { FfprobeData } from 'fluent-ffmpeg'
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import { FFmpegCommandWrapper, FFmpegCommandWrapperOptions } from './ffmpeg-command-wrapper.js'
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import { getVideoStreamDuration } from './ffprobe.js'
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export class FFmpegImage {
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private readonly commandWrapper: FFmpegCommandWrapper
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constructor (options: FFmpegCommandWrapperOptions) {
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this.commandWrapper = new FFmpegCommandWrapper(options)
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}
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convertWebPToJPG (options: {
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path: string
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destination: string
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}): Promise<void> {
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const { path, destination } = options
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this.commandWrapper.buildCommand(path)
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.output(destination)
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return this.commandWrapper.runCommand({ silent: true })
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}
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processGIF (options: {
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path: string
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destination: string
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newSize: { width: number, height: number }
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}): Promise<void> {
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const { path, destination, newSize } = options
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this.commandWrapper.buildCommand(path)
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.fps(20)
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.size(`${newSize.width}x${newSize.height}`)
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.output(destination)
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return this.commandWrapper.runCommand()
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}
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// ---------------------------------------------------------------------------
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async generateThumbnailFromVideo (options: {
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fromPath: string
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output: string
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framesToAnalyze: number
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ffprobe?: FfprobeData
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}) {
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const { fromPath, ffprobe } = options
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let duration = await getVideoStreamDuration(fromPath, ffprobe)
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if (isNaN(duration)) duration = 0
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this.buildGenerateThumbnailFromVideo(options)
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.seekInput(duration / 2)
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try {
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return await this.commandWrapper.runCommand()
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} catch (err) {
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this.commandWrapper.debugLog('Cannot generate thumbnail from video using seek input, fallback to no seek', { err })
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this.commandWrapper.resetCommand()
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this.buildGenerateThumbnailFromVideo(options)
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return this.commandWrapper.runCommand()
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}
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}
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private buildGenerateThumbnailFromVideo (options: {
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fromPath: string
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output: string
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framesToAnalyze: number
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}) {
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const { fromPath, output, framesToAnalyze } = options
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return this.commandWrapper.buildCommand(fromPath)
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.videoFilter('thumbnail=' + framesToAnalyze)
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.outputOption('-frames:v 1')
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.outputOption('-abort_on empty_output')
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.output(output)
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}
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// ---------------------------------------------------------------------------
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async generateStoryboardFromVideo (options: {
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path: string
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destination: string
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sprites: {
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size: {
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width: number
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height: number
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}
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count: {
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width: number
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height: number
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}
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duration: number
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}
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}) {
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const { path, destination, sprites } = options
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const command = this.commandWrapper.buildCommand(path)
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const filter = [
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`setpts=N/round(FRAME_RATE)/TB`,
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`select='not(mod(t,${options.sprites.duration}))'`,
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`scale=${sprites.size.width}:${sprites.size.height}`,
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`tile=layout=${sprites.count.width}x${sprites.count.height}`
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].join(',')
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command.outputOption('-filter_complex', filter)
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command.outputOption('-frames:v', '1')
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command.outputOption('-q:v', '2')
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command.output(destination)
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return this.commandWrapper.runCommand()
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}
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}
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