diff --git a/cmd/mp4/mp4.go b/cmd/mp4/mp4.go
index 825cb647..e6df4910 100644
--- a/cmd/mp4/mp4.go
+++ b/cmd/mp4/mp4.go
@@ -9,7 +9,6 @@ import (
 	"github.com/AlexxIT/go2rtc/cmd/api"
 	"github.com/AlexxIT/go2rtc/cmd/app"
 	"github.com/AlexxIT/go2rtc/cmd/streams"
-	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/mp4"
 	"github.com/AlexxIT/go2rtc/pkg/tcp"
 	"github.com/rs/zerolog"
@@ -106,12 +105,15 @@ func handlerMP4(w http.ResponseWriter, r *http.Request) {
 	cons := &mp4.Consumer{
 		RemoteAddr: tcp.RemoteAddr(r),
 		UserAgent:  r.UserAgent(),
-		Medias:     core.ParseQuery(r.URL.Query()),
+		Medias:     mp4.ParseQuery(r.URL.Query()),
 	}
 
 	cons.Listen(func(msg any) {
+		if exit == nil {
+			return
+		}
 		if data, ok := msg.([]byte); ok {
-			if _, err := w.Write(data); err != nil && exit != nil {
+			if _, err := w.Write(data); err != nil {
 				select {
 				case exit <- err:
 				default:
@@ -151,7 +153,10 @@ func handlerMP4(w http.ResponseWriter, r *http.Request) {
 		if i, _ := strconv.Atoi(s); i > 0 {
 			duration = time.AfterFunc(time.Second*time.Duration(i), func() {
 				if exit != nil {
-					exit <- nil
+					select {
+					case exit <- nil:
+					default:
+					}
 					exit = nil
 				}
 			})
@@ -159,6 +164,7 @@ func handlerMP4(w http.ResponseWriter, r *http.Request) {
 	}
 
 	err = <-exit
+	exit = nil
 
 	log.Trace().Err(err).Caller().Send()
 
diff --git a/pkg/mp4/helpers.go b/pkg/mp4/helpers.go
index 909b59cb..c22f1220 100644
--- a/pkg/mp4/helpers.go
+++ b/pkg/mp4/helpers.go
@@ -4,9 +4,45 @@ import "github.com/AlexxIT/go2rtc/pkg/core"
 
 // ParseQuery - like usual parse, but with mp4 param handler
 func ParseQuery(query map[string][]string) []*core.Media {
-	if query["mp4"] != nil {
-		cons := Consumer{}
-		return cons.GetMedias()
+	if v := query["mp4"]; len(v) != 0 {
+		medias := []*core.Media{
+			{
+				Kind:      core.KindVideo,
+				Direction: core.DirectionSendonly,
+				Codecs: []*core.Codec{
+					{Name: core.CodecH264},
+					{Name: core.CodecH265},
+				},
+			},
+			{
+				Kind:      core.KindAudio,
+				Direction: core.DirectionSendonly,
+				Codecs: []*core.Codec{
+					{Name: core.CodecAAC},
+				},
+			},
+		}
+
+		if v[0] == "" {
+			return medias // legacy
+		}
+
+		medias[1].Codecs = append(medias[1].Codecs,
+			&core.Codec{Name: core.CodecPCMA},
+			&core.Codec{Name: core.CodecPCMU},
+			&core.Codec{Name: core.CodecPCM},
+		)
+
+		if v[0] == "flac" {
+			return medias // modern browsers
+		}
+
+		medias[1].Codecs = append(medias[1].Codecs,
+			&core.Codec{Name: core.CodecOpus},
+			&core.Codec{Name: core.CodecMP3},
+		)
+
+		return medias // Chrome, FFmpeg, VLC
 	}
 
 	return core.ParseQuery(query)
diff --git a/www/links.html b/www/links.html
index 94f5e4df..fab598a6 100644
--- a/www/links.html
+++ b/www/links.html
@@ -68,11 +68,13 @@
             <h2>H264/H265 source</h2>
             <li><a href="stream.html?src=${src}&mode=webrtc">stream.html</a> WebRTC stream / browsers: all / codecs: H264, PCMU, PCMA, OPUS / +H265 in Safari</li>
             <li><a href="stream.html?src=${src}&mode=mse">stream.html</a> MSE stream / browsers: Chrome, Firefox, Safari Mac/iPad / codecs: H264, H265*, AAC, PCMA*, PCMU*, PCM* / +OPUS in Chrome and Firefox</li>
-            <li><a href="api/stream.mp4?src=${src}">stream.mp4</a> MP4 stream with AAC audio / browsers: Chrome, Firefox / codecs: H264, H265*, AAC</li>
-            <li><a href="api/stream.mp4?src=${src}&video=h264,h265&audio=aac,opus,mp3,pcma,pcmu,pcm">stream.mp4</a> MP4 stream with any audio / browsers: Chrome / codecs: H264, H265*, AAC, OPUS, MP3, PCMA, PCMU, PCM</li>
+            <li><a href="api/stream.mp4?src=${src}">stream.mp4</a> legacy MP4 stream with AAC audio / browsers: Chrome, Firefox / codecs: H264, H265*, AAC</li>
+            <li><a href="api/stream.mp4?src=${src}&mp4=flac">stream.mp4</a> modern MP4 stream with common audio / browsers: Chrome, Firefox / codecs: H264, H265*, AAC, FLAC (PCMA, PCMU, PCM)</li>
+            <li><a href="api/stream.mp4?src=${src}&mp4=all">stream.mp4</a> MP4 stream with any audio / browsers: Chrome / codecs: H264, H265*, AAC, OPUS, MP3, FLAC (PCMA, PCMU, PCM)</li>
             <li><a href="api/frame.mp4?src=${src}">frame.mp4</a> snapshot in MP4-format / browsers: all / codecs: H264, H265*</li>
-            <li><a href="api/stream.m3u8?src=${src}">stream.m3u8</a> HLS/TS / browsers: Safari all, Chrome Android / codecs: H264</li>
-            <li><a href="api/stream.m3u8?src=${src}&mp4">stream.m3u8</a> HLS/fMP4 / browsers: Safari all, Chrome Android / codecs: H264, H265*, AAC</li>
+            <li><a href="api/stream.m3u8?src=${src}">stream.m3u8</a> legacy HLS/TS / browsers: Safari all, Chrome Android / codecs: H264</li>
+            <li><a href="api/stream.m3u8?src=${src}&mp4">stream.m3u8</a> legacy HLS/fMP4 / browsers: Safari all, Chrome Android / codecs: H264, H265*, AAC</li>
+            <li><a href="api/stream.m3u8?src=${src}&mp4=flac">stream.m3u8</a> modern HLS/fMP4 / browsers: Safari all, Chrome Android / codecs: H264, H265*, AAC, FLAC (PCMA, PCMU, PCM)</li>
 
             <h2>MJPEG source</h2>
             <li><a href="stream.html?src=${src}&mode=mjpeg">stream.html</a> with MJPEG mode / browsers: all / codecs: MJPEG, JPEG</li>