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123 lines
2.4 KiB
Go
123 lines
2.4 KiB
Go
package src
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import (
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"fmt"
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"log"
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"strings"
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"gopkg.in/vansante/go-ffprobe.v2"
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)
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// convert mediainfo to RFC 6381, waiting for either of those tickets to be resolved:
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//
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// https://sourceforge.net/p/mediainfo/feature-requests/499
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// https://trac.ffmpeg.org/ticket/6617
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//
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// this code is addapted from https://github.com/jellyfin/jellyfin/blob/master/Jellyfin.Api/Helpers/HlsCodecStringHelpers.cs
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// and https://git.ffmpeg.org/gitweb/ffmpeg.git/blob/HEAD%3a/libavformat/hlsenc.c#l344
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func GetMimeCodec(stream *ffprobe.Stream) *string {
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switch stream.CodecName {
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case "h264":
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ret := "avc1"
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switch strings.ToLower(stream.Profile) {
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case "high":
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ret += ".6400"
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case "main":
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ret += ".4D40"
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case "baseline":
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ret += ".42E0"
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default:
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// Default to constrained baseline if profile is invalid
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ret += ".4240"
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}
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ret += fmt.Sprintf("%02x", stream.Level)
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return &ret
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case "h265", "hevc":
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// The h265 syntax is a bit of a mystery at the time this comment was written.
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// This is what I've found through various sources:
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// FORMAT: [codecTag].[profile].[constraint?].L[level * 30].[UNKNOWN]
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ret := "hvc1"
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if stream.Profile == "main 10" {
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ret += ".2.4"
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} else {
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ret += ".1.4"
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}
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ret += fmt.Sprintf(".L%02X.BO", stream.Level)
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return &ret
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case "av1":
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// https://aomedia.org/av1/specification/annex-a/
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// FORMAT: [codecTag].[profile].[level][tier].[bitDepth]
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ret := "av01"
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switch strings.ToLower(stream.Profile) {
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case "main":
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ret += ".0"
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case "high":
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ret += ".1"
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case "professional":
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ret += ".2"
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default:
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}
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// not sure about this field, we want pixel bit depth
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bitdepth := ParseUint(stream.BitsPerRawSample)
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if bitdepth != 8 && bitdepth != 10 && bitdepth != 12 {
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// Default to 8 bits
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bitdepth = 8
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}
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tierflag := 'M'
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ret += fmt.Sprintf(".%02X%c.%02d", stream.Level, tierflag, bitdepth)
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return &ret
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case "aac":
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ret := "mp4a"
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switch strings.ToLower(stream.Profile) {
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case "he":
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ret += ".40.5"
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case "lc":
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ret += ".40.2"
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default:
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ret += ".40.2"
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}
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return &ret
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case "mp3":
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ret := "mp4a.40.34"
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return &ret
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case "opus":
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ret := "Opus"
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return &ret
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case "ac3":
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ret := "mp4a.a5"
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return &ret
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case "eac3":
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ret := "mp4a.a6"
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return &ret
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case "flac":
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ret := "fLaC"
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return &ret
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case "alac":
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ret := "alac"
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return &ret
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default:
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log.Printf("No known mime format for: %s", stream.CodecName)
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return nil
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}
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}
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