From d272d4b6c3ff93b7ca7218a303cf550d0a39981a Mon Sep 17 00:00:00 2001
From: Alexey Khit <alexey.khit@gmail.com>
Date: Sat, 15 Jul 2023 11:42:50 +0300
Subject: [PATCH] Fix FLAC mime type for Chrome

---
 internal/hls/hls.go | 12 ++++++++----
 internal/hls/ws.go  |  5 ++++-
 pkg/mp4/muxer.go    |  5 +++--
 3 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/internal/hls/hls.go b/internal/hls/hls.go
index 2565d282..3a551200 100644
--- a/internal/hls/hls.go
+++ b/internal/hls/hls.go
@@ -1,6 +1,11 @@
 package hls
 
 import (
+	"net/http"
+	"strings"
+	"sync"
+	"time"
+
 	"github.com/AlexxIT/go2rtc/internal/api"
 	"github.com/AlexxIT/go2rtc/internal/api/ws"
 	"github.com/AlexxIT/go2rtc/internal/app"
@@ -10,9 +15,6 @@ import (
 	"github.com/AlexxIT/go2rtc/pkg/mpegts"
 	"github.com/AlexxIT/go2rtc/pkg/tcp"
 	"github.com/rs/zerolog"
-	"net/http"
-	"sync"
-	"time"
 )
 
 func Init() {
@@ -137,9 +139,11 @@ segment.ts?id=` + sid + `&n=%d`
 	sessions[sid] = session
 	sessionsMu.Unlock()
 
+	codecs := strings.Replace(cons.MimeCodecs(), mp4.MimeFlac, "fLaC", 1)
+
 	// bandwidth important for Safari, codecs useful for smooth playback
 	data := []byte(`#EXTM3U
-#EXT-X-STREAM-INF:BANDWIDTH=192000,CODECS="` + cons.MimeCodecs() + `"
+#EXT-X-STREAM-INF:BANDWIDTH=192000,CODECS="` + codecs + `"
 hls/playlist.m3u8?id=` + sid)
 
 	if _, err := w.Write(data); err != nil {
diff --git a/internal/hls/ws.go b/internal/hls/ws.go
index 81a1dd72..c8aebc1b 100644
--- a/internal/hls/ws.go
+++ b/internal/hls/ws.go
@@ -2,6 +2,7 @@ package hls
 
 import (
 	"errors"
+	"strings"
 	"time"
 
 	"github.com/AlexxIT/go2rtc/internal/api"
@@ -68,9 +69,11 @@ segment.m4s?id=` + sid + `&n=%d`
 	sessions[sid] = session
 	sessionsMu.Unlock()
 
+	codecs = strings.Replace(cons.MimeCodecs(), mp4.MimeFlac, "fLaC", 1)
+
 	// bandwidth important for Safari, codecs useful for smooth playback
 	data := `#EXTM3U
-#EXT-X-STREAM-INF:BANDWIDTH=192000,CODECS="` + cons.MimeCodecs() + `"
+#EXT-X-STREAM-INF:BANDWIDTH=192000,CODECS="` + codecs + `"
 hls/playlist.m3u8?id=` + sid
 
 	tr.Write(&ws.Message{Type: "hls", Value: data})
diff --git a/pkg/mp4/muxer.go b/pkg/mp4/muxer.go
index 96b8a372..f01758ec 100644
--- a/pkg/mp4/muxer.go
+++ b/pkg/mp4/muxer.go
@@ -2,6 +2,7 @@ package mp4
 
 import (
 	"encoding/hex"
+
 	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/h264"
 	"github.com/AlexxIT/go2rtc/pkg/h265"
@@ -22,7 +23,7 @@ const (
 	MimeH264 = "avc1.640029"
 	MimeH265 = "hvc1.1.6.L153.B0"
 	MimeAAC  = "mp4a.40.2"
-	MimeFlac = "fLaC" // case is important for Apple HLS
+	MimeFlac = "flac"
 	MimeOpus = "opus"
 )
 
@@ -64,7 +65,7 @@ func (m *Muxer) GetInit(codecs []*core.Codec) ([]byte, error) {
 		switch codec.Name {
 		case core.CodecH264:
 			sps, pps := h264.GetParameterSet(codec.FmtpLine)
-			// some dummy SPS and PPS not a problem
+			// some dummy SPS and PPS not a problem for MP4, but problem for HLS :(
 			if len(sps) == 0 {
 				sps = []byte{0x67, 0x42, 0x00, 0x0a, 0xf8, 0x41, 0xa2}
 			}