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import { Job } from 'bullmq'
import { join } from 'path'
import { getFFmpegCommandWrapperOptions } from '@server/helpers/ffmpeg'
import { generateImageFilename, getImageSize } from '@server/helpers/image-utils'
import { logger, loggerTagsFactory } from '@server/helpers/logger'
import { CONFIG } from '@server/initializers/config'
import { STORYBOARD } from '@server/initializers/constants'
import { federateVideoIfNeeded } from '@server/lib/activitypub/videos'
import { VideoPathManager } from '@server/lib/video-path-manager'
import { StoryboardModel } from '@server/models/video/storyboard'
import { VideoModel } from '@server/models/video/video'
import { MVideo } from '@server/types/models'
import { FFmpegImage, isAudioFile } from '@shared/ffmpeg'
import { GenerateStoryboardPayload } from '@shared/models'
const lTagsBase = loggerTagsFactory('storyboard')
async function processGenerateStoryboard (job: Job): Promise<void> {
const payload = job.data as GenerateStoryboardPayload
const lTags = lTagsBase(payload.videoUUID)
logger.info('Processing generate storyboard of %s in job %s.', payload.videoUUID, job.id, lTags)
const inputFileMutexReleaser = await VideoPathManager.Instance.lockFiles(payload.videoUUID)
try {
const video = await VideoModel.loadFull(payload.videoUUID)
if (!video) {
logger.info('Video %s does not exist anymore, skipping storyboard generation.', payload.videoUUID, lTags)
return
}
const inputFile = video.getMaxQualityFile()
await VideoPathManager.Instance.makeAvailableVideoFile(inputFile, async videoPath => {
const isAudio = await isAudioFile(videoPath)
if (isAudio) {
logger.info('Do not generate a storyboard of %s since the video does not have a video stream', payload.videoUUID, lTags)
return
}
const ffmpeg = new FFmpegImage(getFFmpegCommandWrapperOptions('thumbnail'))
const filename = generateImageFilename()
const destination = join(CONFIG.STORAGE.STORYBOARDS_DIR, filename)
const totalSprites = buildTotalSprites(video)
if (totalSprites === 0) {
logger.info('Do not generate a storyboard of %s because the video is not long enough', payload.videoUUID, lTags)
return
}
const spriteDuration = Math.round(video.duration / totalSprites)
const spritesCount = findGridSize({
toFind: totalSprites,
maxEdgeCount: STORYBOARD.SPRITES_MAX_EDGE_COUNT
})
logger.debug(
'Generating storyboard from video of %s to %s', video.uuid, destination,
{ ...lTags, spritesCount, spriteDuration, videoDuration: video.duration }
)
await ffmpeg.generateStoryboardFromVideo({
destination,
path: videoPath,
sprites: {
size: STORYBOARD.SPRITE_SIZE,
count: spritesCount,
duration: spriteDuration
}
})
const imageSize = await getImageSize(destination)
const existing = await StoryboardModel.loadByVideo(video.id)
if (existing) await existing.destroy()
await StoryboardModel.create({
filename,
totalHeight: imageSize.height,
totalWidth: imageSize.width,
spriteHeight: STORYBOARD.SPRITE_SIZE.height,
spriteWidth: STORYBOARD.SPRITE_SIZE.width,
spriteDuration,
videoId: video.id
})
logger.info('Storyboard generation %s ended for video %s.', destination, video.uuid, lTags)
})
if (payload.federate) {
await federateVideoIfNeeded(video, false)
}
} finally {
inputFileMutexReleaser()
}
}
// ---------------------------------------------------------------------------
export {
processGenerateStoryboard
}
function buildTotalSprites (video: MVideo) {
const maxSprites = STORYBOARD.SPRITE_SIZE.height * STORYBOARD.SPRITE_SIZE.width
const totalSprites = Math.min(Math.ceil(video.duration), maxSprites)
// We can generate a single line
if (totalSprites <= STORYBOARD.SPRITES_MAX_EDGE_COUNT) return totalSprites
return findGridFit(totalSprites, STORYBOARD.SPRITES_MAX_EDGE_COUNT)
}
function findGridSize (options: {
toFind: number
maxEdgeCount: number
}) {
const { toFind, maxEdgeCount } = options
for (let i = 1; i <= maxEdgeCount; i++) {
for (let j = i; j <= maxEdgeCount; j++) {
if (toFind === i * j) return { width: j, height: i }
}
}
throw new Error(`Could not find grid size (to find: ${toFind}, max edge count: ${maxEdgeCount}`)
}
function findGridFit (value: number, maxMultiplier: number) {
for (let i = value; i--; i > 0) {
if (!isPrimeWithin(i, maxMultiplier)) return i
}
throw new Error('Could not find prime number below ' + value)
}
function isPrimeWithin (value: number, maxMultiplier: number) {
if (value < 2) return false
for (let i = 2, end = Math.min(Math.sqrt(value), maxMultiplier); i <= end; i++) {
if (value % i === 0 && value / i <= maxMultiplier) return false
}
return true
}
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