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import { FfprobeData } from 'fluent-ffmpeg'
import { CONFIG } from '@server/initializers/config'
import { VIDEO_TRANSCODING_FPS } from '@server/initializers/constants'
import { getMaxBitrate } from '@shared/core-utils'
import {
ffprobePromise,
getAudioStream,
getMaxAudioBitrate,
getVideoStream,
getVideoStreamBitrate,
getVideoStreamDimensionsInfo,
getVideoStreamFPS
} from '@shared/ffmpeg'
export async function canDoQuickTranscode (path: string, existingProbe?: FfprobeData): Promise<boolean> {
if (CONFIG.TRANSCODING.PROFILE !== 'default') return false
const probe = existingProbe || await ffprobePromise(path)
return await canDoQuickVideoTranscode(path, probe) &&
await canDoQuickAudioTranscode(path, probe)
}
export async function canDoQuickAudioTranscode (path: string, probe?: FfprobeData): Promise<boolean> {
const parsedAudio = await getAudioStream(path, probe)
if (!parsedAudio.audioStream) return true
if (parsedAudio.audioStream['codec_name'] !== 'aac') return false
const audioBitrate = parsedAudio.bitrate
if (!audioBitrate) return false
const maxAudioBitrate = getMaxAudioBitrate('aac', audioBitrate)
if (maxAudioBitrate !== -1 && audioBitrate > maxAudioBitrate) return false
const channelLayout = parsedAudio.audioStream['channel_layout']
// Causes playback issues with Chrome
if (!channelLayout || channelLayout === 'unknown' || channelLayout === 'quad') return false
return true
}
export async function canDoQuickVideoTranscode (path: string, probe?: FfprobeData): Promise<boolean> {
const videoStream = await getVideoStream(path, probe)
const fps = await getVideoStreamFPS(path, probe)
const bitRate = await getVideoStreamBitrate(path, probe)
const resolutionData = await getVideoStreamDimensionsInfo(path, probe)
// If ffprobe did not manage to guess the bitrate
if (!bitRate) return false
// check video params
if (!videoStream) return false
if (videoStream['codec_name'] !== 'h264') return false
if (videoStream['pix_fmt'] !== 'yuv420p') return false
if (fps < VIDEO_TRANSCODING_FPS.MIN || fps > VIDEO_TRANSCODING_FPS.MAX) return false
if (bitRate > getMaxBitrate({ ...resolutionData, fps })) return false
return true
}
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