hls: fix toggling hlsAlwaysRemux after server is started (#4503)

When hlsAlwaysRemux was switched from false to true, through API or hot
reloading, muxers of existing paths were not created. This fixes the
issue.

internal/api/api.go

@@ -77,48 +77,6 @@ func recordingsOfPath(
 	return ret
 }
 
-// PathManager contains methods used by the API and Metrics server.
-type PathManager interface {
-	APIPathsList() (*defs.APIPathList, error)
-	APIPathsGet(string) (*defs.APIPath, error)
-}
-
-// HLSServer contains methods used by the API and Metrics server.
-type HLSServer interface {
-	APIMuxersList() (*defs.APIHLSMuxerList, error)
-	APIMuxersGet(string) (*defs.APIHLSMuxer, error)
-}
-
-// RTSPServer contains methods used by the API and Metrics server.
-type RTSPServer interface {
-	APIConnsList() (*defs.APIRTSPConnsList, error)
-	APIConnsGet(uuid.UUID) (*defs.APIRTSPConn, error)
-	APISessionsList() (*defs.APIRTSPSessionList, error)
-	APISessionsGet(uuid.UUID) (*defs.APIRTSPSession, error)
-	APISessionsKick(uuid.UUID) error
-}
-
-// RTMPServer contains methods used by the API and Metrics server.
-type RTMPServer interface {
-	APIConnsList() (*defs.APIRTMPConnList, error)
-	APIConnsGet(uuid.UUID) (*defs.APIRTMPConn, error)
-	APIConnsKick(uuid.UUID) error
-}
-
-// SRTServer contains methods used by the API and Metrics server.
-type SRTServer interface {
-	APIConnsList() (*defs.APISRTConnList, error)
-	APIConnsGet(uuid.UUID) (*defs.APISRTConn, error)
-	APIConnsKick(uuid.UUID) error
-}
-
-// WebRTCServer contains methods used by the API and Metrics server.
-type WebRTCServer interface {
-	APISessionsList() (*defs.APIWebRTCSessionList, error)
-	APISessionsGet(uuid.UUID) (*defs.APIWebRTCSession, error)
-	APISessionsKick(uuid.UUID) error
-}
-
 type apiAuthManager interface {
 	Authenticate(req *auth.Request) error
 }
@@ -139,14 +97,14 @@ type API struct {
 	ReadTimeout    conf.Duration
 	Conf           *conf.Conf
 	AuthManager    apiAuthManager
-	PathManager    PathManager
-	RTSPServer     RTSPServer
-	RTSPSServer    RTSPServer
-	RTMPServer     RTMPServer
-	RTMPSServer    RTMPServer
-	HLSServer      HLSServer
-	WebRTCServer   WebRTCServer
-	SRTServer      SRTServer
+	PathManager    defs.APIPathManager
+	RTSPServer     defs.APIRTSPServer
+	RTSPSServer    defs.APIRTSPServer
+	RTMPServer     defs.APIRTMPServer
+	RTMPSServer    defs.APIRTMPServer
+	HLSServer      defs.APIHLSServer
+	WebRTCServer   defs.APIWebRTCServer
+	SRTServer      defs.APISRTServer
 	Parent         apiParent
 
 	httpServer *httpp.Server

internal/core/core.go

@@ -361,13 +361,10 @@ func (p *Core) createResources(initial bool) error {
 			udpMaxPayloadSize: p.conf.UDPMaxPayloadSize,
 			pathConfs:         p.conf.Paths,
 			externalCmdPool:   p.externalCmdPool,
+			metrics:           p.metrics,
 			parent:            p,
 		}
 		p.pathManager.initialize()
-
-		if p.metrics != nil {
-			p.metrics.SetPathManager(p.pathManager)
-		}
 	}
 
 	if p.conf.RTSP &&
@@ -399,6 +396,7 @@ func (p *Core) createResources(initial bool) error {
 			RunOnConnectRestart: p.conf.RunOnConnectRestart,
 			RunOnDisconnect:     p.conf.RunOnDisconnect,
 			ExternalCmdPool:     p.externalCmdPool,
+			Metrics:             p.metrics,
 			PathManager:         p.pathManager,
 			Parent:              p,
 		}
@@ -407,10 +405,6 @@ func (p *Core) createResources(initial bool) error {
 			return err
 		}
 		p.rtspServer = i
-
-		if p.metrics != nil {
-			p.metrics.SetRTSPServer(p.rtspServer)
-		}
 	}
 
 	if p.conf.RTSP &&
@@ -439,6 +433,7 @@ func (p *Core) createResources(initial bool) error {
 			RunOnConnectRestart: p.conf.RunOnConnectRestart,
 			RunOnDisconnect:     p.conf.RunOnDisconnect,
 			ExternalCmdPool:     p.externalCmdPool,
+			Metrics:             p.metrics,
 			PathManager:         p.pathManager,
 			Parent:              p,
 		}
@@ -447,10 +442,6 @@ func (p *Core) createResources(initial bool) error {
 			return err
 		}
 		p.rtspsServer = i
-
-		if p.metrics != nil {
-			p.metrics.SetRTSPSServer(p.rtspsServer)
-		}
 	}
 
 	if p.conf.RTMP &&
@@ -469,6 +460,7 @@ func (p *Core) createResources(initial bool) error {
 			RunOnConnectRestart: p.conf.RunOnConnectRestart,
 			RunOnDisconnect:     p.conf.RunOnDisconnect,
 			ExternalCmdPool:     p.externalCmdPool,
+			Metrics:             p.metrics,
 			PathManager:         p.pathManager,
 			Parent:              p,
 		}
@@ -477,10 +469,6 @@ func (p *Core) createResources(initial bool) error {
 			return err
 		}
 		p.rtmpServer = i
-
-		if p.metrics != nil {
-			p.metrics.SetRTMPServer(p.rtmpServer)
-		}
 	}
 
 	if p.conf.RTMP &&
@@ -499,6 +487,7 @@ func (p *Core) createResources(initial bool) error {
 			RunOnConnectRestart: p.conf.RunOnConnectRestart,
 			RunOnDisconnect:     p.conf.RunOnDisconnect,
 			ExternalCmdPool:     p.externalCmdPool,
+			Metrics:             p.metrics,
 			PathManager:         p.pathManager,
 			Parent:              p,
 		}
@@ -507,10 +496,6 @@ func (p *Core) createResources(initial bool) error {
 			return err
 		}
 		p.rtmpsServer = i
-
-		if p.metrics != nil {
-			p.metrics.SetRTMPSServer(p.rtmpsServer)
-		}
 	}
 
 	if p.conf.HLS &&
@@ -531,6 +516,7 @@ func (p *Core) createResources(initial bool) error {
 			Directory:       p.conf.HLSDirectory,
 			ReadTimeout:     p.conf.ReadTimeout,
 			MuxerCloseAfter: p.conf.HLSMuxerCloseAfter,
+			Metrics:         p.metrics,
 			PathManager:     p.pathManager,
 			Parent:          p,
 		}
@@ -539,12 +525,6 @@ func (p *Core) createResources(initial bool) error {
 			return err
 		}
 		p.hlsServer = i
-
-		p.pathManager.setHLSServer(p.hlsServer)
-
-		if p.metrics != nil {
-			p.metrics.SetHLSServer(p.hlsServer)
-		}
 	}
 
 	if p.conf.WebRTC &&
@@ -567,6 +547,7 @@ func (p *Core) createResources(initial bool) error {
 			STUNGatherTimeout:     p.conf.WebRTCSTUNGatherTimeout,
 			TrackGatherTimeout:    p.conf.WebRTCTrackGatherTimeout,
 			ExternalCmdPool:       p.externalCmdPool,
+			Metrics:               p.metrics,
 			PathManager:           p.pathManager,
 			Parent:                p,
 		}
@@ -575,10 +556,6 @@ func (p *Core) createResources(initial bool) error {
 			return err
 		}
 		p.webRTCServer = i
-
-		if p.metrics != nil {
-			p.metrics.SetWebRTCServer(p.webRTCServer)
-		}
 	}
 
 	if p.conf.SRT &&
@@ -593,6 +570,7 @@ func (p *Core) createResources(initial bool) error {
 			RunOnConnectRestart: p.conf.RunOnConnectRestart,
 			RunOnDisconnect:     p.conf.RunOnDisconnect,
 			ExternalCmdPool:     p.externalCmdPool,
+			Metrics:             p.metrics,
 			PathManager:         p.pathManager,
 			Parent:              p,
 		}
@@ -601,10 +579,6 @@ func (p *Core) createResources(initial bool) error {
 			return err
 		}
 		p.srtServer = i
-
-		if p.metrics != nil {
-			p.metrics.SetSRTServer(p.srtServer)
-		}
 	}
 
 	if p.conf.API &&
@@ -887,75 +861,41 @@ func (p *Core) closeResources(newConf *conf.Conf, calledByAPI bool) {
 	}
 
 	if closeSRTServer && p.srtServer != nil {
-		if p.metrics != nil {
-			p.metrics.SetSRTServer(nil)
-		}
-
 		p.srtServer.Close()
 		p.srtServer = nil
 	}
 
 	if closeWebRTCServer && p.webRTCServer != nil {
-		if p.metrics != nil {
-			p.metrics.SetWebRTCServer(nil)
-		}
-
 		p.webRTCServer.Close()
 		p.webRTCServer = nil
 	}
 
 	if closeHLSServer && p.hlsServer != nil {
-		if p.metrics != nil {
-			p.metrics.SetHLSServer(nil)
-		}
-
-		p.pathManager.setHLSServer(nil)
-
 		p.hlsServer.Close()
 		p.hlsServer = nil
 	}
 
 	if closeRTMPSServer && p.rtmpsServer != nil {
-		if p.metrics != nil {
-			p.metrics.SetRTMPSServer(nil)
-		}
-
 		p.rtmpsServer.Close()
 		p.rtmpsServer = nil
 	}
 
 	if closeRTMPServer && p.rtmpServer != nil {
-		if p.metrics != nil {
-			p.metrics.SetRTMPServer(nil)
-		}
-
 		p.rtmpServer.Close()
 		p.rtmpServer = nil
 	}
 
 	if closeRTSPSServer && p.rtspsServer != nil {
-		if p.metrics != nil {
-			p.metrics.SetRTSPSServer(nil)
-		}
-
 		p.rtspsServer.Close()
 		p.rtspsServer = nil
 	}
 
 	if closeRTSPServer && p.rtspServer != nil {
-		if p.metrics != nil {
-			p.metrics.SetRTSPServer(nil)
-		}
-
 		p.rtspServer.Close()
 		p.rtspServer = nil
 	}
 
 	if closePathManager && p.pathManager != nil {
-		if p.metrics != nil {
-			p.metrics.SetPathManager(nil)
-		}
-
 		p.pathManager.close()
 		p.pathManager = nil
 	}

internal/core/path.go

@@ -161,6 +161,10 @@ func (pa *path) Name() string {
 	return pa.name
 }
 
+func (pa *path) isReady() bool {
+	return pa.stream != nil
+}
+
 func (pa *path) run() {
 	defer close(pa.done)
 	defer pa.wg.Done()
@@ -568,28 +572,28 @@ func (pa *path) doAPIPathsGet(req pathAPIPathsGetReq) {
 				v := pa.source.APISourceDescribe()
 				return &v
 			}(),
-			Ready: pa.stream != nil,
+			Ready: pa.isReady(),
 			ReadyTime: func() *time.Time {
-				if pa.stream == nil {
+				if !pa.isReady() {
 					return nil
 				}
 				v := pa.readyTime
 				return &v
 			}(),
 			Tracks: func() []string {
-				if pa.stream == nil {
+				if !pa.isReady() {
 					return []string{}
 				}
 				return defs.MediasToCodecs(pa.stream.Desc.Medias)
 			}(),
 			BytesReceived: func() uint64 {
-				if pa.stream == nil {
+				if !pa.isReady() {
 					return 0
 				}
 				return pa.stream.BytesReceived()
 			}(),
 			BytesSent: func() uint64 {
-				if pa.stream == nil {
+				if !pa.isReady() {
 					return 0
 				}
 				return pa.stream.BytesSent()

internal/core/path_manager.go

@@ -11,6 +11,8 @@ import (
 	"github.com/bluenviron/mediamtx/internal/defs"
 	"github.com/bluenviron/mediamtx/internal/externalcmd"
 	"github.com/bluenviron/mediamtx/internal/logger"
+	"github.com/bluenviron/mediamtx/internal/metrics"
+	"github.com/bluenviron/mediamtx/internal/servers/hls"
 	"github.com/bluenviron/mediamtx/internal/stream"
 )
 
@@ -39,9 +41,18 @@ func pathConfCanBeUpdated(oldPathConf *conf.Path, newPathConf *conf.Path) bool {
 	return newPathConf.Equal(clone)
 }
 
-type pathManagerHLSServer interface {
-	PathReady(defs.Path)
-	PathNotReady(defs.Path)
+type pathSetHLSServerRes struct {
+	readyPaths []defs.Path
+}
+
+type pathSetHLSServerReq struct {
+	s   *hls.Server
+	res chan pathSetHLSServerRes
+}
+
+type pathData struct {
+	path  *path
+	ready bool
 }
 
 type pathManagerParent interface {
@@ -58,18 +69,19 @@ type pathManager struct {
 	udpMaxPayloadSize int
 	pathConfs         map[string]*conf.Path
 	externalCmdPool   *externalcmd.Pool
+	metrics           *metrics.Metrics
 	parent            pathManagerParent
 
 	ctx         context.Context
 	ctxCancel   func()
 	wg          sync.WaitGroup
-	hlsManager  pathManagerHLSServer
-	paths       map[string]*path
+	hlsServer   *hls.Server
+	paths       map[string]*pathData
 	pathsByConf map[string]map[*path]struct{}
 
 	// in
 	chReloadConf   chan map[string]*conf.Path
-	chSetHLSServer chan pathManagerHLSServer
+	chSetHLSServer chan pathSetHLSServerReq
 	chClosePath    chan *path
 	chPathReady    chan *path
 	chPathNotReady chan *path
@@ -86,10 +98,10 @@ func (pm *pathManager) initialize() {
 
 	pm.ctx = ctx
 	pm.ctxCancel = ctxCancel
-	pm.paths = make(map[string]*path)
+	pm.paths = make(map[string]*pathData)
 	pm.pathsByConf = make(map[string]map[*path]struct{})
 	pm.chReloadConf = make(chan map[string]*conf.Path)
-	pm.chSetHLSServer = make(chan pathManagerHLSServer)
+	pm.chSetHLSServer = make(chan pathSetHLSServerReq)
 	pm.chClosePath = make(chan *path)
 	pm.chPathReady = make(chan *path)
 	pm.chPathNotReady = make(chan *path)
@@ -110,10 +122,19 @@ func (pm *pathManager) initialize() {
 
 	pm.wg.Add(1)
 	go pm.run()
+
+	if pm.metrics != nil {
+		pm.metrics.SetPathManager(pm)
+	}
 }
 
 func (pm *pathManager) close() {
 	pm.Log(logger.Debug, "path manager is shutting down")
+
+	if pm.metrics != nil {
+		pm.metrics.SetPathManager(nil)
+	}
+
 	pm.ctxCancel()
 	pm.wg.Wait()
 }
@@ -132,8 +153,9 @@ outer:
 		case newPaths := <-pm.chReloadConf:
 			pm.doReloadConf(newPaths)
 
-		case m := <-pm.chSetHLSServer:
-			pm.doSetHLSServer(m)
+		case req := <-pm.chSetHLSServer:
+			readyPaths := pm.doSetHLSServer(req.s)
+			req.res <- pathSetHLSServerRes{readyPaths: readyPaths}
 
 		case pa := <-pm.chClosePath:
 			pm.doClosePath(pa)
@@ -207,26 +229,48 @@ func (pm *pathManager) doReloadConf(newPaths map[string]*conf.Path) {
 	}
 }
 
-func (pm *pathManager) doSetHLSServer(m pathManagerHLSServer) {
-	pm.hlsManager = m
+func (pm *pathManager) doSetHLSServer(m *hls.Server) []defs.Path {
+	pm.hlsServer = m
+
+	var ret []defs.Path
+
+	for _, pd := range pm.paths {
+		if pd.ready {
+			ret = append(ret, pd.path)
+		}
+	}
+
+	return ret
 }
 
 func (pm *pathManager) doClosePath(pa *path) {
-	if pmpa, ok := pm.paths[pa.name]; !ok || pmpa != pa {
+	if pd, ok := pm.paths[pa.name]; !ok || pd.path != pa {
 		return
 	}
 	pm.removePath(pa)
 }
 
 func (pm *pathManager) doPathReady(pa *path) {
-	if pm.hlsManager != nil {
-		pm.hlsManager.PathReady(pa)
+	if pd, ok := pm.paths[pa.name]; !ok || pd.path != pa {
+		return
+	}
+
+	pm.paths[pa.name].ready = true
+
+	if pm.hlsServer != nil {
+		pm.hlsServer.PathReady(pa)
 	}
 }
 
 func (pm *pathManager) doPathNotReady(pa *path) {
-	if pm.hlsManager != nil {
-		pm.hlsManager.PathNotReady(pa)
+	if pd, ok := pm.paths[pa.name]; !ok || pd.path != pa {
+		return
+	}
+
+	pm.paths[pa.name].ready = false
+
+	if pm.hlsServer != nil {
+		pm.hlsServer.PathNotReady(pa)
 	}
 }
 
@@ -264,7 +308,8 @@ func (pm *pathManager) doDescribe(req defs.PathDescribeReq) {
 		pm.createPath(pathConf, req.AccessRequest.Name, pathMatches)
 	}
 
-	req.Res <- defs.PathDescribeRes{Path: pm.paths[req.AccessRequest.Name]}
+	pd := pm.paths[req.AccessRequest.Name]
+	req.Res <- defs.PathDescribeRes{Path: pd.path}
 }
 
 func (pm *pathManager) doAddReader(req defs.PathAddReaderReq) {
@@ -287,7 +332,8 @@ func (pm *pathManager) doAddReader(req defs.PathAddReaderReq) {
 		pm.createPath(pathConf, req.AccessRequest.Name, pathMatches)
 	}
 
-	req.Res <- defs.PathAddReaderRes{Path: pm.paths[req.AccessRequest.Name]}
+	pd := pm.paths[req.AccessRequest.Name]
+	req.Res <- defs.PathAddReaderRes{Path: pd.path}
 }
 
 func (pm *pathManager) doAddPublisher(req defs.PathAddPublisherReq) {
@@ -310,27 +356,28 @@ func (pm *pathManager) doAddPublisher(req defs.PathAddPublisherReq) {
 		pm.createPath(pathConf, req.AccessRequest.Name, pathMatches)
 	}
 
-	req.Res <- defs.PathAddPublisherRes{Path: pm.paths[req.AccessRequest.Name]}
+	pd := pm.paths[req.AccessRequest.Name]
+	req.Res <- defs.PathAddPublisherRes{Path: pd.path}
 }
 
 func (pm *pathManager) doAPIPathsList(req pathAPIPathsListReq) {
 	paths := make(map[string]*path)
 
-	for name, pa := range pm.paths {
-		paths[name] = pa
+	for name, pd := range pm.paths {
+		paths[name] = pd.path
 	}
 
 	req.res <- pathAPIPathsListRes{paths: paths}
 }
 
 func (pm *pathManager) doAPIPathsGet(req pathAPIPathsGetReq) {
-	path, ok := pm.paths[req.name]
+	pd, ok := pm.paths[req.name]
 	if !ok {
 		req.res <- pathAPIPathsGetRes{err: conf.ErrPathNotFound}
 		return
 	}
 
-	req.res <- pathAPIPathsGetRes{path: path}
+	req.res <- pathAPIPathsGetRes{path: pd.path}
 }
 
 func (pm *pathManager) createPath(
@@ -355,7 +402,7 @@ func (pm *pathManager) createPath(
 	}
 	pa.initialize()
 
-	pm.paths[name] = pa
+	pm.paths[name] = &pathData{path: pa}
 
 	if _, ok := pm.pathsByConf[pathConf.Name]; !ok {
 		pm.pathsByConf[pathConf.Name] = make(map[*path]struct{})
@@ -476,11 +523,20 @@ func (pm *pathManager) AddReader(req defs.PathAddReaderReq) (defs.Path, *stream.
 	}
 }
 
-// setHLSServer is called by hlsManager.
-func (pm *pathManager) setHLSServer(s pathManagerHLSServer) {
+// SetHLSServer is called by hls.Server.
+func (pm *pathManager) SetHLSServer(s *hls.Server) []defs.Path {
+	req := pathSetHLSServerReq{
+		s:   s,
+		res: make(chan pathSetHLSServerRes),
+	}
+
 	select {
-	case pm.chSetHLSServer <- s:
+	case pm.chSetHLSServer <- req:
+		res := <-req.res
+		return res.readyPaths
+
 	case <-pm.ctx.Done():
+		return nil
 	}
 }
 

internal/defs/api.go

@@ -8,6 +8,48 @@ import (
 	"github.com/bluenviron/mediamtx/internal/conf"
 )
 
+// APIPathManager contains methods used by the API and Metrics server.
+type APIPathManager interface {
+	APIPathsList() (*APIPathList, error)
+	APIPathsGet(string) (*APIPath, error)
+}
+
+// APIHLSServer contains methods used by the API and Metrics server.
+type APIHLSServer interface {
+	APIMuxersList() (*APIHLSMuxerList, error)
+	APIMuxersGet(string) (*APIHLSMuxer, error)
+}
+
+// APIRTSPServer contains methods used by the API and Metrics server.
+type APIRTSPServer interface {
+	APIConnsList() (*APIRTSPConnsList, error)
+	APIConnsGet(uuid.UUID) (*APIRTSPConn, error)
+	APISessionsList() (*APIRTSPSessionList, error)
+	APISessionsGet(uuid.UUID) (*APIRTSPSession, error)
+	APISessionsKick(uuid.UUID) error
+}
+
+// APIRTMPServer contains methods used by the API and Metrics server.
+type APIRTMPServer interface {
+	APIConnsList() (*APIRTMPConnList, error)
+	APIConnsGet(uuid.UUID) (*APIRTMPConn, error)
+	APIConnsKick(uuid.UUID) error
+}
+
+// APISRTServer contains methods used by the API and Metrics server.
+type APISRTServer interface {
+	APIConnsList() (*APISRTConnList, error)
+	APIConnsGet(uuid.UUID) (*APISRTConn, error)
+	APIConnsKick(uuid.UUID) error
+}
+
+// APIWebRTCServer contains methods used by the API and Metrics server.
+type APIWebRTCServer interface {
+	APISessionsList() (*APIWebRTCSessionList, error)
+	APISessionsGet(uuid.UUID) (*APIWebRTCSession, error)
+	APISessionsKick(uuid.UUID) error
+}
+
 // APIError is a generic error.
 type APIError struct {
 	Error string `json:"error"`

internal/metrics/metrics.go

@@ -12,9 +12,9 @@ import (
 
 	"github.com/gin-gonic/gin"
 
-	"github.com/bluenviron/mediamtx/internal/api"
 	"github.com/bluenviron/mediamtx/internal/auth"
 	"github.com/bluenviron/mediamtx/internal/conf"
+	"github.com/bluenviron/mediamtx/internal/defs"
 	"github.com/bluenviron/mediamtx/internal/logger"
 	"github.com/bluenviron/mediamtx/internal/protocols/httpp"
 	"github.com/bluenviron/mediamtx/internal/restrictnetwork"
@@ -54,14 +54,14 @@ type Metrics struct {
 
 	httpServer   *httpp.Server
 	mutex        sync.Mutex
-	pathManager  api.PathManager
-	rtspServer   api.RTSPServer
-	rtspsServer  api.RTSPServer
-	rtmpServer   api.RTMPServer
-	rtmpsServer  api.RTMPServer
-	srtServer    api.SRTServer
-	hlsManager   api.HLSServer
-	webRTCServer api.WebRTCServer
+	pathManager  defs.APIPathManager
+	rtspServer   defs.APIRTSPServer
+	rtspsServer  defs.APIRTSPServer
+	rtmpServer   defs.APIRTMPServer
+	rtmpsServer  defs.APIRTMPServer
+	srtServer    defs.APISRTServer
+	hlsServer    defs.APIHLSServer
+	webRTCServer defs.APIWebRTCServer
 }
 
 // Initialize initializes metrics.
@@ -166,8 +166,8 @@ func (m *Metrics) onMetrics(ctx *gin.Context) {
 		out += metric("paths", "", 0)
 	}
 
-	if !interfaceIsEmpty(m.hlsManager) {
-		data, err := m.hlsManager.APIMuxersList()
+	if !interfaceIsEmpty(m.hlsServer) {
+		data, err := m.hlsServer.APIMuxersList()
 		if err == nil && len(data.Items) != 0 {
 			for _, i := range data.Items {
 				tags := "{name=\"" + i.Path + "\"}"
@@ -447,56 +447,56 @@ func (m *Metrics) onMetrics(ctx *gin.Context) {
 }
 
 // SetPathManager is called by core.
-func (m *Metrics) SetPathManager(s api.PathManager) {
+func (m *Metrics) SetPathManager(s defs.APIPathManager) {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 	m.pathManager = s
 }
 
 // SetHLSServer is called by core.
-func (m *Metrics) SetHLSServer(s api.HLSServer) {
+func (m *Metrics) SetHLSServer(s defs.APIHLSServer) {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
-	m.hlsManager = s
+	m.hlsServer = s
 }
 
 // SetRTSPServer is called by core.
-func (m *Metrics) SetRTSPServer(s api.RTSPServer) {
+func (m *Metrics) SetRTSPServer(s defs.APIRTSPServer) {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 	m.rtspServer = s
 }
 
 // SetRTSPSServer is called by core.
-func (m *Metrics) SetRTSPSServer(s api.RTSPServer) {
+func (m *Metrics) SetRTSPSServer(s defs.APIRTSPServer) {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 	m.rtspsServer = s
 }
 
 // SetRTMPServer is called by core.
-func (m *Metrics) SetRTMPServer(s api.RTMPServer) {
+func (m *Metrics) SetRTMPServer(s defs.APIRTMPServer) {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 	m.rtmpServer = s
 }
 
 // SetRTMPSServer is called by core.
-func (m *Metrics) SetRTMPSServer(s api.RTMPServer) {
+func (m *Metrics) SetRTMPSServer(s defs.APIRTMPServer) {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 	m.rtmpsServer = s
 }
 
 // SetSRTServer is called by core.
-func (m *Metrics) SetSRTServer(s api.SRTServer) {
+func (m *Metrics) SetSRTServer(s defs.APISRTServer) {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 	m.srtServer = s
 }
 
 // SetWebRTCServer is called by core.
-func (m *Metrics) SetWebRTCServer(s api.WebRTCServer) {
+func (m *Metrics) SetWebRTCServer(s defs.APIWebRTCServer) {
 	m.mutex.Lock()
 	defer m.mutex.Unlock()
 	m.webRTCServer = s

internal/servers/hls/server.go

@@ -5,6 +5,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"reflect"
 	"sort"
 	"sync"
 
@@ -17,6 +18,10 @@ import (
 // ErrMuxerNotFound is returned when a muxer is not found.
 var ErrMuxerNotFound = errors.New("muxer not found")
 
+func interfaceIsEmpty(i interface{}) bool {
+	return reflect.ValueOf(i).Kind() != reflect.Ptr || reflect.ValueOf(i).IsNil()
+}
+
 type serverGetMuxerRes struct {
 	muxer *muxer
 	err   error
@@ -49,7 +54,12 @@ type serverAPIMuxersGetReq struct {
 	res  chan serverAPIMuxersGetRes
 }
 
+type serverMetrics interface {
+	SetHLSServer(defs.APIHLSServer)
+}
+
 type serverPathManager interface {
+	SetHLSServer(*Server) []defs.Path
 	FindPathConf(req defs.PathFindPathConfReq) (*conf.Path, error)
 	AddReader(req defs.PathAddReaderReq) (defs.Path, *stream.Stream, error)
 }
@@ -75,6 +85,7 @@ type Server struct {
 	Directory       string
 	ReadTimeout     conf.Duration
 	MuxerCloseAfter conf.Duration
+	Metrics         serverMetrics
 	PathManager     serverPathManager
 	Parent          serverParent
 
@@ -129,6 +140,10 @@ func (s *Server) Initialize() error {
 	s.wg.Add(1)
 	go s.run()
 
+	if !interfaceIsEmpty(s.Metrics) {
+		s.Metrics.SetHLSServer(s)
+	}
+
 	return nil
 }
 
@@ -140,6 +155,11 @@ func (s *Server) Log(level logger.Level, format string, args ...interface{}) {
 // Close closes the server.
 func (s *Server) Close() {
 	s.Log(logger.Info, "listener is closing")
+
+	if !interfaceIsEmpty(s.Metrics) {
+		s.Metrics.SetHLSServer(nil)
+	}
+
 	s.ctxCancel()
 	s.wg.Wait()
 }
@@ -147,6 +167,19 @@ func (s *Server) Close() {
 func (s *Server) run() {
 	defer s.wg.Done()
 
+	readyPaths := s.PathManager.SetHLSServer(s)
+	defer s.PathManager.SetHLSServer(nil)
+
+	if s.AlwaysRemux {
+		for _, pa := range readyPaths {
+			if !pa.SafeConf().SourceOnDemand {
+				if _, ok := s.muxers[pa.Name()]; !ok {
+					s.createMuxer(pa.Name(), "", "")
+				}
+			}
+		}
+	}
+
 outer:
 	for {
 		select {

internal/servers/hls/server_test.go

@@ -21,6 +21,27 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
+type dummyPathManager struct {
+	setHLSServerImpl func() []defs.Path
+	findPathConfImpl func(req defs.PathFindPathConfReq) (*conf.Path, error)
+	addReaderImpl    func(req defs.PathAddReaderReq) (defs.Path, *stream.Stream, error)
+}
+
+func (pm *dummyPathManager) SetHLSServer(*Server) []defs.Path {
+	if pm.setHLSServerImpl != nil {
+		return pm.setHLSServerImpl()
+	}
+	return nil
+}
+
+func (pm *dummyPathManager) FindPathConf(req defs.PathFindPathConfReq) (*conf.Path, error) {
+	return pm.findPathConfImpl(req)
+}
+
+func (pm *dummyPathManager) AddReader(req defs.PathAddReaderReq) (defs.Path, *stream.Stream, error) {
+	return pm.addReaderImpl(req)
+}
+
 type dummyPath struct{}
 
 func (pa *dummyPath) Name() string {
@@ -53,6 +74,7 @@ func TestPreflightRequest(t *testing.T) {
 		Address:     "127.0.0.1:8888",
 		AllowOrigin: "*",
 		ReadTimeout: conf.Duration(10 * time.Second),
+		PathManager: &dummyPathManager{},
 		Parent:      test.NilLogger,
 	}
 	err := s.Initialize()
@@ -90,12 +112,12 @@ func TestServerNotFound(t *testing.T) {
 		"always remux on",
 	} {
 		t.Run(ca, func(t *testing.T) {
-			pm := &test.PathManager{
-				FindPathConfImpl: func(req defs.PathFindPathConfReq) (*conf.Path, error) {
+			pm := &dummyPathManager{
+				findPathConfImpl: func(req defs.PathFindPathConfReq) (*conf.Path, error) {
 					require.Equal(t, "nonexisting", req.AccessRequest.Name)
 					return &conf.Path{}, nil
 				},
-				AddReaderImpl: func(req defs.PathAddReaderReq) (defs.Path, *stream.Stream, error) {
+				addReaderImpl: func(req defs.PathAddReaderReq) (defs.Path, *stream.Stream, error) {
 					require.Equal(t, "nonexisting", req.AccessRequest.Name)
 					return nil, nil, fmt.Errorf("not found")
 				},
@@ -164,15 +186,15 @@ func TestServerRead(t *testing.T) {
 		err := strm.Initialize()
 		require.NoError(t, err)
 
-		pm := &test.PathManager{
-			FindPathConfImpl: func(req defs.PathFindPathConfReq) (*conf.Path, error) {
+		pm := &dummyPathManager{
+			findPathConfImpl: func(req defs.PathFindPathConfReq) (*conf.Path, error) {
 				require.Equal(t, "teststream", req.AccessRequest.Name)
 				require.Equal(t, "param=value", req.AccessRequest.Query)
 				require.Equal(t, "myuser", req.AccessRequest.User)
 				require.Equal(t, "mypass", req.AccessRequest.Pass)
 				return &conf.Path{}, nil
 			},
-			AddReaderImpl: func(req defs.PathAddReaderReq) (defs.Path, *stream.Stream, error) {
+			addReaderImpl: func(req defs.PathAddReaderReq) (defs.Path, *stream.Stream, error) {
 				require.Equal(t, "teststream", req.AccessRequest.Name)
 				require.Equal(t, "param=value", req.AccessRequest.Query)
 				return &dummyPath{}, strm, nil
@@ -264,15 +286,15 @@ func TestServerRead(t *testing.T) {
 		err := strm.Initialize()
 		require.NoError(t, err)
 
-		pm := &test.PathManager{
-			FindPathConfImpl: func(req defs.PathFindPathConfReq) (*conf.Path, error) {
+		pm := &dummyPathManager{
+			findPathConfImpl: func(req defs.PathFindPathConfReq) (*conf.Path, error) {
 				require.Equal(t, "teststream", req.AccessRequest.Name)
 				require.Equal(t, "param=value", req.AccessRequest.Query)
 				require.Equal(t, "myuser", req.AccessRequest.User)
 				require.Equal(t, "mypass", req.AccessRequest.Pass)
 				return &conf.Path{}, nil
 			},
-			AddReaderImpl: func(req defs.PathAddReaderReq) (defs.Path, *stream.Stream, error) {
+			addReaderImpl: func(req defs.PathAddReaderReq) (defs.Path, *stream.Stream, error) {
 				require.Equal(t, "teststream", req.AccessRequest.Name)
 				require.Equal(t, "", req.AccessRequest.Query)
 				return &dummyPath{}, strm, nil
@@ -369,8 +391,8 @@ func TestDirectory(t *testing.T) {
 	err = strm.Initialize()
 	require.NoError(t, err)
 
-	pm := &test.PathManager{
-		AddReaderImpl: func(_ defs.PathAddReaderReq) (defs.Path, *stream.Stream, error) {
+	pm := &dummyPathManager{
+		addReaderImpl: func(_ defs.PathAddReaderReq) (defs.Path, *stream.Stream, error) {
 			return &dummyPath{}, strm, nil
 		},
 	}
@@ -404,3 +426,50 @@ func TestDirectory(t *testing.T) {
 	_, err = os.Stat(filepath.Join(dir, "mydir", "teststream"))
 	require.NoError(t, err)
 }
+
+func TestDynamicAlwaysRemux(t *testing.T) {
+	desc := &description.Session{Medias: []*description.Media{test.MediaH264}}
+
+	strm := &stream.Stream{
+		WriteQueueSize:     512,
+		UDPMaxPayloadSize:  1472,
+		Desc:               desc,
+		GenerateRTPPackets: true,
+		Parent:             test.NilLogger,
+	}
+	err := strm.Initialize()
+	require.NoError(t, err)
+
+	done := make(chan struct{})
+
+	pm := &dummyPathManager{
+		setHLSServerImpl: func() []defs.Path {
+			return []defs.Path{&dummyPath{}}
+		},
+		addReaderImpl: func(_ defs.PathAddReaderReq) (defs.Path, *stream.Stream, error) {
+			close(done)
+			return &dummyPath{}, strm, nil
+		},
+	}
+
+	s := &Server{
+		Address:         "127.0.0.1:8888",
+		Encryption:      false,
+		ServerKey:       "",
+		ServerCert:      "",
+		AlwaysRemux:     true,
+		Variant:         conf.HLSVariant(gohlslib.MuxerVariantMPEGTS),
+		SegmentCount:    7,
+		SegmentDuration: conf.Duration(1 * time.Second),
+		PartDuration:    conf.Duration(200 * time.Millisecond),
+		SegmentMaxSize:  50 * 1024 * 1024,
+		ReadTimeout:     conf.Duration(10 * time.Second),
+		PathManager:     pm,
+		Parent:          test.NilLogger,
+	}
+	err = s.Initialize()
+	require.NoError(t, err)
+	defer s.Close()
+
+	<-done
+}

internal/servers/rtmp/server.go

@@ -7,6 +7,7 @@ import (
 	"errors"
 	"fmt"
 	"net"
+	"reflect"
 	"sort"
 	"sync"
 
@@ -24,6 +25,10 @@ import (
 // ErrConnNotFound is returned when a connection is not found.
 var ErrConnNotFound = errors.New("connection not found")
 
+func interfaceIsEmpty(i interface{}) bool {
+	return reflect.ValueOf(i).Kind() != reflect.Ptr || reflect.ValueOf(i).IsNil()
+}
+
 type serverAPIConnsListRes struct {
 	data *defs.APIRTMPConnList
 	err  error
@@ -52,6 +57,11 @@ type serverAPIConnsKickReq struct {
 	res  chan serverAPIConnsKickRes
 }
 
+type serverMetrics interface {
+	SetRTMPSServer(defs.APIRTMPServer)
+	SetRTMPServer(defs.APIRTMPServer)
+}
+
 type serverPathManager interface {
 	AddPublisher(req defs.PathAddPublisherReq) (defs.Path, error)
 	AddReader(req defs.PathAddReaderReq) (defs.Path, *stream.Stream, error)
@@ -74,6 +84,7 @@ type Server struct {
 	RunOnConnectRestart bool
 	RunOnDisconnect     string
 	ExternalCmdPool     *externalcmd.Pool
+	Metrics             serverMetrics
 	PathManager         serverPathManager
 	Parent              serverParent
 
@@ -140,6 +151,14 @@ func (s *Server) Initialize() error {
 	s.wg.Add(1)
 	go s.run()
 
+	if !interfaceIsEmpty(s.Metrics) {
+		if s.IsTLS {
+			s.Metrics.SetRTMPSServer(s)
+		} else {
+			s.Metrics.SetRTMPServer(s)
+		}
+	}
+
 	return nil
 }
 
@@ -157,8 +176,18 @@ func (s *Server) Log(level logger.Level, format string, args ...interface{}) {
 // Close closes the server.
 func (s *Server) Close() {
 	s.Log(logger.Info, "listener is closing")
+
+	if !interfaceIsEmpty((s.Metrics)) {
+		if s.IsTLS {
+			s.Metrics.SetRTMPSServer(nil)
+		} else {
+			s.Metrics.SetRTMPServer(nil)
+		}
+	}
+
 	s.ctxCancel()
 	s.wg.Wait()
+
 	if s.loader != nil {
 		s.loader.Close()
 	}

internal/servers/rtsp/server.go

@@ -6,6 +6,7 @@ import (
 	"crypto/tls"
 	"errors"
 	"fmt"
+	"reflect"
 	"sort"
 	"strings"
 	"sync"
@@ -31,6 +32,10 @@ var ErrConnNotFound = errors.New("connection not found")
 // ErrSessionNotFound is returned when a session is not found.
 var ErrSessionNotFound = errors.New("session not found")
 
+func interfaceIsEmpty(i interface{}) bool {
+	return reflect.ValueOf(i).Kind() != reflect.Ptr || reflect.ValueOf(i).IsNil()
+}
+
 func printAddresses(srv *gortsplib.Server) string {
 	var ret []string
 
@@ -47,6 +52,11 @@ func printAddresses(srv *gortsplib.Server) string {
 	return strings.Join(ret, ", ")
 }
 
+type serverMetrics interface {
+	SetRTSPSServer(defs.APIRTSPServer)
+	SetRTSPServer(defs.APIRTSPServer)
+}
+
 type serverPathManager interface {
 	Describe(req defs.PathDescribeReq) defs.PathDescribeRes
 	AddPublisher(_ defs.PathAddPublisherReq) (defs.Path, error)
@@ -80,6 +90,7 @@ type Server struct {
 	RunOnConnectRestart bool
 	RunOnDisconnect     string
 	ExternalCmdPool     *externalcmd.Pool
+	Metrics             serverMetrics
 	PathManager         serverPathManager
 	Parent              serverParent
 
@@ -144,6 +155,14 @@ func (s *Server) Initialize() error {
 	s.wg.Add(1)
 	go s.run()
 
+	if !interfaceIsEmpty(s.Metrics) {
+		if s.IsTLS {
+			s.Metrics.SetRTSPSServer(s)
+		} else {
+			s.Metrics.SetRTSPServer(s)
+		}
+	}
+
 	return nil
 }
 
@@ -161,8 +180,18 @@ func (s *Server) Log(level logger.Level, format string, args ...interface{}) {
 // Close closes the server.
 func (s *Server) Close() {
 	s.Log(logger.Info, "listener is closing")
+
+	if !interfaceIsEmpty(s.Metrics) {
+		if s.IsTLS {
+			s.Metrics.SetRTSPSServer(nil)
+		} else {
+			s.Metrics.SetRTSPServer(nil)
+		}
+	}
+
 	s.ctxCancel()
 	s.wg.Wait()
+
 	if s.loader != nil {
 		s.loader.Close()
 	}

internal/servers/srt/server.go

@@ -5,6 +5,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"reflect"
 	"sort"
 	"sync"
 	"time"
@@ -22,6 +23,10 @@ import (
 // ErrConnNotFound is returned when a connection is not found.
 var ErrConnNotFound = errors.New("connection not found")
 
+func interfaceIsEmpty(i interface{}) bool {
+	return reflect.ValueOf(i).Kind() != reflect.Ptr || reflect.ValueOf(i).IsNil()
+}
+
 func srtMaxPayloadSize(u int) int {
 	return ((u - 16) / 188) * 188 // 16 = SRT header, 188 = MPEG-TS packet
 }
@@ -54,6 +59,10 @@ type serverAPIConnsKickReq struct {
 	res  chan serverAPIConnsKickRes
 }
 
+type serverMetrics interface {
+	SetSRTServer(defs.APISRTServer)
+}
+
 type serverPathManager interface {
 	AddPublisher(req defs.PathAddPublisherReq) (defs.Path, error)
 	AddReader(req defs.PathAddReaderReq) (defs.Path, *stream.Stream, error)
@@ -74,6 +83,7 @@ type Server struct {
 	RunOnConnectRestart bool
 	RunOnDisconnect     string
 	ExternalCmdPool     *externalcmd.Pool
+	Metrics             serverMetrics
 	PathManager         serverPathManager
 	Parent              serverParent
 
@@ -126,6 +136,10 @@ func (s *Server) Initialize() error {
 	s.wg.Add(1)
 	go s.run()
 
+	if !interfaceIsEmpty(s.Metrics) {
+		s.Metrics.SetSRTServer(s)
+	}
+
 	return nil
 }
 
@@ -137,6 +151,11 @@ func (s *Server) Log(level logger.Level, format string, args ...interface{}) {
 // Close closes the server.
 func (s *Server) Close() {
 	s.Log(logger.Info, "listener is closing")
+
+	if !interfaceIsEmpty(s.Metrics) {
+		s.Metrics.SetSRTServer(nil)
+	}
+
 	s.ctxCancel()
 	s.wg.Wait()
 }

internal/servers/webrtc/server.go

@@ -11,6 +11,7 @@ import (
 	"fmt"
 	"net"
 	"net/http"
+	"reflect"
 	"sort"
 	"strconv"
 	"sync"
@@ -36,6 +37,10 @@ const (
 // ErrSessionNotFound is returned when a session is not found.
 var ErrSessionNotFound = errors.New("session not found")
 
+func interfaceIsEmpty(i interface{}) bool {
+	return reflect.ValueOf(i).Kind() != reflect.Ptr || reflect.ValueOf(i).IsNil()
+}
+
 type nilWriter struct{}
 
 func (nilWriter) Write(p []byte) (int, error) {
@@ -163,6 +168,10 @@ type webRTCDeleteSessionReq struct {
 	res      chan webRTCDeleteSessionRes
 }
 
+type serverMetrics interface {
+	SetWebRTCServer(defs.APIWebRTCServer)
+}
+
 type serverPathManager interface {
 	FindPathConf(req defs.PathFindPathConfReq) (*conf.Path, error)
 	AddPublisher(req defs.PathAddPublisherReq) (defs.Path, error)
@@ -192,6 +201,7 @@ type Server struct {
 	TrackGatherTimeout    conf.Duration
 	STUNGatherTimeout     conf.Duration
 	ExternalCmdPool       *externalcmd.Pool
+	Metrics               serverMetrics
 	PathManager           serverPathManager
 	Parent                serverParent
 
@@ -284,6 +294,10 @@ func (s *Server) Initialize() error {
 
 	go s.run()
 
+	if !interfaceIsEmpty(s.Metrics) {
+		s.Metrics.SetWebRTCServer(s)
+	}
+
 	return nil
 }
 
@@ -295,6 +309,11 @@ func (s *Server) Log(level logger.Level, format string, args ...interface{}) {
 // Close closes the server.
 func (s *Server) Close() {
 	s.Log(logger.Info, "listener is closing")
+
+	if !interfaceIsEmpty(s.Metrics) {
+		s.Metrics.SetWebRTCServer(nil)
+	}
+
 	s.ctxCancel()
 	<-s.done
 }