+async function buildHLSVODCommand (command: ffmpeg.FfmpegCommand, options: HLSTranscodeOptions) {
+ const videoPath = getHLSVideoPath(options)
+
+ if (options.copyCodecs) command = presetCopy(command)
+ else if (options.resolution === VideoResolution.H_NOVIDEO) command = presetOnlyAudio(command)
+ else command = await buildx264VODCommand(command, options)
+
+ command = command.outputOption('-hls_time 4')
+ .outputOption('-hls_list_size 0')
+ .outputOption('-hls_playlist_type vod')
+ .outputOption('-hls_segment_filename ' + videoPath)
+ .outputOption('-hls_segment_type fmp4')
+ .outputOption('-f hls')
+ .outputOption('-hls_flags single_file')
+
+ return command
+}
+
+async function fixHLSPlaylistIfNeeded (options: TranscodeOptions) {
+ if (options.type !== 'hls') return
+
+ const fileContent = await readFile(options.outputPath)
+
+ const videoFileName = options.hlsPlaylist.videoFilename
+ const videoFilePath = getHLSVideoPath(options)
+
+ // Fix wrong mapping with some ffmpeg versions
+ const newContent = fileContent.toString()
+ .replace(`#EXT-X-MAP:URI="${videoFilePath}",`, `#EXT-X-MAP:URI="${videoFileName}",`)
+
+ await writeFile(options.outputPath, newContent)
+}
+
+function getHLSVideoPath (options: HLSTranscodeOptions) {
+ return `${dirname(options.outputPath)}/${options.hlsPlaylist.videoFilename}`
+}
+
+// ---------------------------------------------------------------------------
+// Transcoding presets
+// ---------------------------------------------------------------------------
+
+async function getEncoderBuilderResult (options: {
+ streamType: string
+ input: string
+
+ availableEncoders: AvailableEncoders
+ profile: string
+
+ videoType: 'vod' | 'live'
+
+ resolution: number
+ fps?: number
+ streamNum?: number
+}) {
+ const { availableEncoders, input, profile, resolution, streamType, fps, streamNum, videoType } = options
+
+ const encodersToTry: string[] = VIDEO_TRANSCODING_ENCODERS[streamType]
+
+ for (const encoder of encodersToTry) {
+ if (!(await checkFFmpegEncoders()).get(encoder) || !availableEncoders[videoType][encoder]) continue
+
+ const builderProfiles: EncoderProfile<EncoderOptionsBuilder> = availableEncoders[videoType][encoder]
+ let builder = builderProfiles[profile]
+
+ if (!builder) {
+ logger.debug('Profile %s for encoder %s not available. Fallback to default.', profile, encoder)
+ builder = builderProfiles.default