hls: stop spamming 'stream doesn't contain any supported codec' when hlsAlwaysRemux is true (#3018)

internal/servers/hls/muxer.go

@@ -153,7 +153,7 @@ func (m *muxer) runInner() error {
 	}
 	err = mi.initialize()
 	if err != nil {
-		if m.remoteAddr != "" {
+		if m.remoteAddr != "" || errors.Is(err, errNoSupportedCodecs) {
 			return err
 		}
 

internal/servers/hls/muxer_instance.go

@@ -1,6 +1,7 @@
 package hls
 
 import (
+	"errors"
 	"fmt"
 	"os"
 	"path/filepath"
@@ -18,6 +19,9 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
+var errNoSupportedCodecs = errors.New(
+	"the stream doesn't contain any supported codec, which are currently H265, H264, Opus, MPEG-4 Audio")
+
 type muxerInstance struct {
 	variant         conf.HLSVariant
 	segmentCount    int
@@ -43,8 +47,7 @@ func (mi *muxerInstance) initialize() error {
 
 	if videoTrack == nil && audioTrack == nil {
 		mi.stream.RemoveReader(mi.writer)
-		return fmt.Errorf(
+		return errNoSupportedCodecs
-			"the stream doesn't contain any supported codec, which are currently H265, H264, Opus, MPEG-4 Audio")
 	}
 
 	var muxerDirectory string

internal/servers/rtmp/conn.go

@@ -32,6 +32,9 @@ const (
 	pauseAfterAuthError = 2 * time.Second
 )
 
+var errNoSupportedCodecs = errors.New(
+	"the stream doesn't contain any supported codec, which are currently H264, MPEG-4 Audio, MPEG-1/2 Audio")
+
 func pathNameAndQuery(inURL *url.URL) (string, url.Values, string) {
 	// remove leading and trailing slashes inserted by OBS and some other clients
 	tmp := strings.TrimRight(inURL.String(), "/")
@@ -212,8 +215,7 @@ func (c *conn) runRead(conn *rtmp.Conn, u *url.URL) error {
 		writer)
 
 	if videoFormat == nil && audioFormat == nil {
-		return fmt.Errorf(
+		return errNoSupportedCodecs
-			"the stream doesn't contain any supported codec, which are currently H264, MPEG-4 Audio, MPEG-1/2 Audio")
 	}
 
 	c.Log(logger.Info, "is reading from path '%s', %s",

internal/servers/webrtc/session.go

@@ -32,6 +32,9 @@ import (
 	"github.com/bluenviron/mediamtx/internal/unit"
 )
 
+var errNoSupportedCodecs = errors.New(
+	"the stream doesn't contain any supported codec, which are currently AV1, VP9, VP8, H264, Opus, G722, G711")
+
 type setupStreamFunc func(*webrtc.OutgoingTrack) error
 
 func findVideoTrack(
@@ -547,8 +550,7 @@ func (s *session) runRead() (int, error) {
 	audioTrack, audioSetup := findAudioTrack(stream, writer)
 
 	if videoTrack == nil && audioTrack == nil {
-		return http.StatusBadRequest, fmt.Errorf(
+		return http.StatusBadRequest, errNoSupportedCodecs
-			"the stream doesn't contain any supported codec, which are currently AV1, VP9, VP8, H264, Opus, G722, G711")
 	}
 
 	tracks, err := pc.SetupOutgoingTracks(videoTrack, audioTrack)