Merge pull request #250 from kerberos-io/fix/add-avc-description-fallback

fix/add-avc-description-fallback

.github/workflows/docker-dev.yml

@@ -1,58 +0,0 @@
-name: Docker development build
-
-on:
-  push:
-    branches: [develop]
-
-jobs:
-  build-amd64:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        architecture: [amd64]
-    steps:
-      - name: Login to DockerHub
-        uses: docker/login-action@v2
-        with:
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
-      - name: Checkout
-        uses: actions/checkout@v3
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v2
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
-      - name: Available platforms
-        run: echo ${{ steps.buildx.outputs.platforms }}
-      - name: Run Buildx
-        run: docker buildx build --platform linux/${{matrix.architecture}} -t kerberos/agent-dev:arch-$(echo ${{matrix.architecture}} | tr / -)-$(echo $GITHUB_SHA | cut -c1-7) --push .
-      - name: Create new and append to manifest
-        run: docker buildx imagetools create -t kerberos/agent-dev:$(echo $GITHUB_SHA | cut -c1-7) kerberos/agent-dev:arch-$(echo ${{matrix.architecture}} | tr / -)-$(echo $GITHUB_SHA | cut -c1-7)
-      - name: Create new and append to latest manifest
-        run: docker buildx imagetools create -t kerberos/agent-dev:latest kerberos/agent-dev:arch-$(echo ${{matrix.architecture}} | tr / -)-$(echo $GITHUB_SHA | cut -c1-7)
-  build-other:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        #architecture: [arm64, arm/v7, arm/v6]
-        architecture: [arm64, arm/v7]
-    steps:
-      - name: Login to DockerHub
-        uses: docker/login-action@v2
-        with:
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
-      - name: Checkout
-        uses: actions/checkout@v3
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v2
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
-      - name: Available platforms
-        run: echo ${{ steps.buildx.outputs.platforms }}
-      - name: Run Buildx
-        run: docker buildx build --platform linux/${{matrix.architecture}} -t kerberos/agent-dev:arch-$(echo ${{matrix.architecture}} | tr / -)-$(echo $GITHUB_SHA | cut -c1-7) --push .
-      - name: Create new and append to manifest
-        run: docker buildx imagetools create --append -t kerberos/agent-dev:$(echo $GITHUB_SHA | cut -c1-7) kerberos/agent-dev:arch-$(echo ${{matrix.architecture}} | tr / -)-$(echo $GITHUB_SHA | cut -c1-7)
-      - name: Create new and append to manifest latest
-        run: docker buildx imagetools create --append -t kerberos/agent-dev:latest kerberos/agent-dev:arch-$(echo ${{matrix.architecture}} | tr / -)-$(echo $GITHUB_SHA | cut -c1-7)

.github/workflows/issue-userstory-create.yml

@@ -0,0 +1,51 @@
+name: Create User Story Issue
+on:
+  workflow_dispatch:
+    inputs:
+      issue_title:
+        description: 'Title for the issue'
+        required: true
+      issue_description:
+        description: 'Brief description of the feature'
+        required: true
+      complexity:
+        description: 'Complexity of the feature'
+        required: true
+        type: choice
+        options:
+          - 'Low'
+          - 'Medium'
+          - 'High'
+        default: 'Medium'
+      duration:
+        description: 'Estimated duration'
+        required: true
+        type: choice
+        options:
+          - '1 day'
+          - '3 days'
+          - '1 week'
+          - '2 weeks'
+          - '1 month'
+        default: '1 week'
+
+jobs:
+  create-issue:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    steps:
+      - name: Create Issue with User Story
+        uses: cedricve/llm-create-issue-user-story@main
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          azure_openai_api_key: ${{ secrets.AZURE_OPENAI_API_KEY }}
+          azure_openai_endpoint: ${{ secrets.AZURE_OPENAI_ENDPOINT }}
+          azure_openai_version: ${{ secrets.AZURE_OPENAI_VERSION }}
+          openai_model: ${{ secrets.OPENAI_MODEL }}
+          issue_title: ${{ github.event.inputs.issue_title }}
+          issue_description: ${{ github.event.inputs.issue_description }}
+          complexity: ${{ github.event.inputs.complexity }}
+          duration: ${{ github.event.inputs.duration }}
+          labels: 'user-story,feature'
+          assignees: ${{ github.actor }}

.github/workflows/nightly-build.yml

@@ -1,12 +1,14 @@
-name: Docker nightly build
+name: Nightly build
 
 on:
   # Triggers the workflow every day at 9PM (CET).
   schedule:
     - cron: "0 22 * * *"
+  # Allows manual triggering from the Actions tab.
+  workflow_dispatch:
 
 jobs:
-  build-amd64:
+  nightly-build-amd64:
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -18,7 +20,9 @@ jobs:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
       - name: Checkout
-        run: git clone https://github.com/kerberos-io/agent && cd agent
+        uses: actions/checkout@v4
+        with:
+          ref: master
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
       - name: Set up Docker Buildx
@@ -26,10 +30,10 @@ jobs:
       - name: Available platforms
         run: echo ${{ steps.buildx.outputs.platforms }}
       - name: Run Buildx
-        run: cd agent && docker buildx build --platform linux/${{matrix.architecture}} -t kerberos/agent-nightly:arch-$(echo ${{matrix.architecture}} | tr / -)-$(echo $GITHUB_SHA | cut -c1-7) --push .
+        run: docker buildx build --platform linux/${{matrix.architecture}} -t kerberos/agent-nightly:arch-$(echo ${{matrix.architecture}} | tr / -)-$(echo $GITHUB_SHA | cut -c1-7) --push .
       - name: Create new and append to manifest
-        run: cd agent && docker buildx imagetools create -t kerberos/agent-nightly:$(echo $GITHUB_SHA | cut -c1-7) kerberos/agent-nightly:arch-$(echo ${{matrix.architecture}} | tr / -)-$(echo $GITHUB_SHA | cut -c1-7)
-  build-other:
+        run: docker buildx imagetools create -t kerberos/agent-nightly:$(echo $GITHUB_SHA | cut -c1-7) kerberos/agent-nightly:arch-$(echo ${{matrix.architecture}} | tr / -)-$(echo $GITHUB_SHA | cut -c1-7)
+  nightly-build-other:
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -41,7 +45,9 @@ jobs:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
       - name: Checkout
-        run: git clone https://github.com/kerberos-io/agent && cd agent
+        uses: actions/checkout@v4
+        with:
+          ref: master
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
       - name: Set up Docker Buildx
@@ -49,6 +55,6 @@ jobs:
       - name: Available platforms
         run: echo ${{ steps.buildx.outputs.platforms }}
       - name: Run Buildx
-        run: cd agent && docker buildx build --platform linux/${{matrix.architecture}} -t kerberos/agent-nightly:arch-$(echo ${{matrix.architecture}} | tr / -)-$(echo $GITHUB_SHA | cut -c1-7) --push .
+        run: docker buildx build --platform linux/${{matrix.architecture}} -t kerberos/agent-nightly:arch-$(echo ${{matrix.architecture}} | tr / -)-$(echo $GITHUB_SHA | cut -c1-7) --push .
       - name: Create new and append to manifest
-        run: cd agent && docker buildx imagetools create --append -t kerberos/agent-nightly:$(echo $GITHUB_SHA | cut -c1-7) kerberos/agent-nightly:arch-$(echo ${{matrix.architecture}} | tr / -)-$(echo $GITHUB_SHA | cut -c1-7)
+        run: docker buildx imagetools create --append -t kerberos/agent-nightly:$(echo $GITHUB_SHA | cut -c1-7) kerberos/agent-nightly:arch-$(echo ${{matrix.architecture}} | tr / -)-$(echo $GITHUB_SHA | cut -c1-7)

.github/workflows/release-create.yml

@@ -34,7 +34,7 @@ jobs:
           length: 7
       - name: Run Build
         run: |
-          docker build -t ${{matrix.architecture}} .
+          docker build --provenance=false --build-arg VERSION=${{github.event.inputs.tag || github.ref_name}} -t ${{matrix.architecture}} .
           CID=$(docker create ${{matrix.architecture}})
           docker cp ${CID}:/home/agent ./output-${{matrix.architecture}}
           docker rm ${CID}
@@ -71,7 +71,7 @@ jobs:
           length: 7
       - name: Run Build
         run: |
-          docker build -t ${{matrix.architecture}} -f Dockerfile.arm64 .
+          docker build --provenance=false --build-arg VERSION=${{github.event.inputs.tag || github.ref_name}} -t ${{matrix.architecture}} -f Dockerfile.arm64 .
           CID=$(docker create ${{matrix.architecture}})
           docker cp ${CID}:/home/agent ./output-${{matrix.architecture}}
           docker rm ${CID}

.gitignore

@@ -14,4 +14,5 @@ machinery/test*
 machinery/init-dev.sh
 machinery/.env.local
 machinery/vendor
-deployments/docker/private-docker-compose.yaml
+deployments/docker/private-docker-compose.yaml
+video.mp4

Dockerfile

@@ -1,5 +1,6 @@
 
 ARG BASE_IMAGE_VERSION=amd64-ddbe40e
+ARG VERSION=0.0.0
 FROM kerberos/base:${BASE_IMAGE_VERSION} AS build-machinery
 LABEL AUTHOR=uug.ai
 
@@ -34,7 +35,8 @@ RUN cat /go/src/github.com/kerberos-io/agent/machinery/version
 
 RUN cd /go/src/github.com/kerberos-io/agent/machinery && \
 	go mod download && \
-	go build -tags timetzdata,netgo,osusergo --ldflags '-s -w -extldflags "-static -latomic"' main.go && \
+	VERSION=$(cd /go/src/github.com/kerberos-io/agent && git describe --tags --always 2>/dev/null || echo "${VERSION}") && \
+	go build -tags timetzdata,netgo,osusergo --ldflags "-s -w -X github.com/kerberos-io/agent/machinery/src/utils.VERSION=${VERSION} -extldflags '-static -latomic'" main.go && \
 	mkdir -p /agent && \
 	mv main /agent && \
 	mv version /agent && \

Dockerfile.arm64

@@ -1,5 +1,6 @@
 
 ARG BASE_IMAGE_VERSION=arm64-ddbe40e
+ARG VERSION=0.0.0
 FROM kerberos/base:${BASE_IMAGE_VERSION} AS build-machinery
 LABEL AUTHOR=uug.ai
 
@@ -34,7 +35,8 @@ RUN cat /go/src/github.com/kerberos-io/agent/machinery/version
 
 RUN cd /go/src/github.com/kerberos-io/agent/machinery && \
 	go mod download && \
-	go build -tags timetzdata,netgo,osusergo --ldflags '-s -w -extldflags "-static -latomic"' main.go && \
+	VERSION=$(cd /go/src/github.com/kerberos-io/agent && git describe --tags --always 2>/dev/null || echo "${VERSION}") && \
+	go build -tags timetzdata,netgo,osusergo --ldflags "-s -w -X github.com/kerberos-io/agent/machinery/src/utils.VERSION=${VERSION} -extldflags '-static -latomic'" main.go && \
 	mkdir -p /agent && \
 	mv main /agent && \
 	mv version /agent && \

machinery/src/capture/gortsplib.go

@@ -695,14 +695,37 @@ func (g *Golibrtsp) Start(ctx context.Context, streamType string, queue *packets
 							g.Streams[g.VideoH264Index].FPS = fps
 							log.Log.Debug(fmt.Sprintf("capture.golibrtsp.Start(%s): Final FPS=%.2f", streamType, fps))
 							g.VideoH264Forma.SPS = nalu
+							if streamType == "main" && len(nalu) > 0 {
+								// Fallback: store SPS from in-band NALUs when SDP was missing it.
+								configuration.Config.Capture.IPCamera.SPSNALUs = [][]byte{nalu}
+							}
 
 						}
 					case h264.NALUTypePPS:
 						g.VideoH264Forma.PPS = nalu
+						if streamType == "main" && len(nalu) > 0 {
+							// Fallback: store PPS from in-band NALUs when SDP was missing it.
+							configuration.Config.Capture.IPCamera.PPSNALUs = [][]byte{nalu}
+						}
 					}
 					filteredAU = append(filteredAU, nalu)
 				}
 
+				if idrPresent && streamType == "main" {
+					// Ensure config has parameter sets before recordings start.
+					if len(configuration.Config.Capture.IPCamera.SPSNALUs) == 0 && len(g.VideoH264Forma.SPS) > 0 {
+						configuration.Config.Capture.IPCamera.SPSNALUs = [][]byte{g.VideoH264Forma.SPS}
+						log.Log.Warning("capture.golibrtsp.Start(main): fallback SPS set from keyframe")
+					}
+					if len(configuration.Config.Capture.IPCamera.PPSNALUs) == 0 && len(g.VideoH264Forma.PPS) > 0 {
+						configuration.Config.Capture.IPCamera.PPSNALUs = [][]byte{g.VideoH264Forma.PPS}
+						log.Log.Warning("capture.golibrtsp.Start(main): fallback PPS set from keyframe")
+					}
+					if len(configuration.Config.Capture.IPCamera.SPSNALUs) == 0 || len(configuration.Config.Capture.IPCamera.PPSNALUs) == 0 {
+						log.Log.Warning("capture.golibrtsp.Start(main): SPS/PPS still missing after IDR keyframe")
+					}
+				}
+
 				if len(filteredAU) <= 1 || (!nonIDRPresent && !idrPresent) {
 					return
 				}

machinery/src/capture/main.go

@@ -159,6 +159,19 @@ func HandleRecordStream(queue *packets.Queue, configDirectory string, configurat
 					}
 
 					// Close mp4
+					if len(mp4Video.SPSNALUs) == 0 && len(configuration.Config.Capture.IPCamera.SPSNALUs) > 0 {
+						mp4Video.SPSNALUs = configuration.Config.Capture.IPCamera.SPSNALUs
+					}
+					if len(mp4Video.PPSNALUs) == 0 && len(configuration.Config.Capture.IPCamera.PPSNALUs) > 0 {
+						mp4Video.PPSNALUs = configuration.Config.Capture.IPCamera.PPSNALUs
+					}
+					if len(mp4Video.VPSNALUs) == 0 && len(configuration.Config.Capture.IPCamera.VPSNALUs) > 0 {
+						mp4Video.VPSNALUs = configuration.Config.Capture.IPCamera.VPSNALUs
+					}
+					if (videoCodec == "H264" && (len(mp4Video.SPSNALUs) == 0 || len(mp4Video.PPSNALUs) == 0)) ||
+						(videoCodec == "H265" && (len(mp4Video.VPSNALUs) == 0 || len(mp4Video.SPSNALUs) == 0 || len(mp4Video.PPSNALUs) == 0)) {
+						log.Log.Warning("capture.main.HandleRecordStream(continuous): closing MP4 without full parameter sets, moov may be incomplete")
+					}
 					mp4Video.Close(&config)
 					log.Log.Info("capture.main.HandleRecordStream(continuous): recording finished: file save: " + name)
 
@@ -279,6 +292,9 @@ func HandleRecordStream(queue *packets.Queue, configDirectory string, configurat
 					ppsNALUS := configuration.Config.Capture.IPCamera.PPSNALUs
 					vpsNALUS := configuration.Config.Capture.IPCamera.VPSNALUs
 
+					if len(spsNALUS) == 0 || len(ppsNALUS) == 0 {
+						log.Log.Warning("capture.main.HandleRecordStream(continuous): missing SPS/PPS at recording start")
+					}
 					// Create a video file, and set the dimensions.
 					mp4Video = video.NewMP4(fullName, spsNALUS, ppsNALUS, vpsNALUS, configuration.Config.Capture.MaxLengthRecording)
 					mp4Video.SetWidth(width)
@@ -499,6 +515,9 @@ func HandleRecordStream(queue *packets.Queue, configDirectory string, configurat
 				ppsNALUS := configuration.Config.Capture.IPCamera.PPSNALUs
 				vpsNALUS := configuration.Config.Capture.IPCamera.VPSNALUs
 
+				if len(spsNALUS) == 0 || len(ppsNALUS) == 0 {
+					log.Log.Warning("capture.main.HandleRecordStream(motiondetection): missing SPS/PPS at recording start")
+				}
 				// Create a video file, and set the dimensions.
 				mp4Video := video.NewMP4(fullName, spsNALUS, ppsNALUS, vpsNALUS, configuration.Config.Capture.MaxLengthRecording)
 				mp4Video.SetWidth(width)
@@ -574,6 +593,19 @@ func HandleRecordStream(queue *packets.Queue, configDirectory string, configurat
 				lastRecordingTime = pkt.CurrentTime
 
 				// This will close the recording and write the last packet.
+				if len(mp4Video.SPSNALUs) == 0 && len(configuration.Config.Capture.IPCamera.SPSNALUs) > 0 {
+					mp4Video.SPSNALUs = configuration.Config.Capture.IPCamera.SPSNALUs
+				}
+				if len(mp4Video.PPSNALUs) == 0 && len(configuration.Config.Capture.IPCamera.PPSNALUs) > 0 {
+					mp4Video.PPSNALUs = configuration.Config.Capture.IPCamera.PPSNALUs
+				}
+				if len(mp4Video.VPSNALUs) == 0 && len(configuration.Config.Capture.IPCamera.VPSNALUs) > 0 {
+					mp4Video.VPSNALUs = configuration.Config.Capture.IPCamera.VPSNALUs
+				}
+				if (videoCodec == "H264" && (len(mp4Video.SPSNALUs) == 0 || len(mp4Video.PPSNALUs) == 0)) ||
+					(videoCodec == "H265" && (len(mp4Video.VPSNALUs) == 0 || len(mp4Video.SPSNALUs) == 0 || len(mp4Video.PPSNALUs) == 0)) {
+					log.Log.Warning("capture.main.HandleRecordStream(motiondetection): closing MP4 without full parameter sets, moov may be incomplete")
+				}
 				mp4Video.Close(&config)
 				log.Log.Info("capture.main.HandleRecordStream(motiondetection): file save: " + name)
 

machinery/src/utils/main.go

@@ -25,7 +25,10 @@ import (
 	"github.com/nfnt/resize"
 )
 
-const VERSION = "3.5.0"
+// VERSION is the agent version. It defaults to "0.0.0" for local dev builds
+// and is overridden at build time via:
+//   go build -ldflags "-X github.com/kerberos-io/agent/machinery/src/utils.VERSION=v1.2.3"
+var VERSION = "0.0.0"
 
 const letterBytes = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
 

machinery/src/video/mp4.go

@@ -13,6 +13,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/Eyevinn/mp4ff/avc"
 	mp4ff "github.com/Eyevinn/mp4ff/mp4"
 	"github.com/kerberos-io/agent/machinery/src/encryption"
 	"github.com/kerberos-io/agent/machinery/src/log"
@@ -22,6 +23,10 @@ import (
 
 var LastPTS uint64 = 0 // Last PTS for the current segment
 
+// MacEpochOffset is the number of seconds between Mac HFS epoch (1904-01-01)
+// and Unix epoch (1970-01-01). QuickTime requires timestamps in Mac HFS format.
+const MacEpochOffset uint64 = 2082844800
+
 // FragmentDurationMs is the target duration for each fragment in milliseconds.
 // Fragments will be flushed at the first keyframe after this duration has elapsed,
 // resulting in ~3 second fragments (assuming a typical GOP interval).
@@ -29,42 +34,46 @@ const FragmentDurationMs = 3000
 
 type MP4 struct {
 	// FileName is the name of the file
-	FileName            string
-	width               int
-	height              int
-	Segments            []*mp4ff.MediaSegment // List of media segments
-	Segment             *mp4ff.MediaSegment
-	MultiTrackFragment  *mp4ff.Fragment
-	TrackIDs            []uint32
-	FileWriter          *os.File
-	Writer              *bufio.Writer
-	SegmentCount        int
-	SampleCount         int
-	StartPTS            uint64
-	VideoTotalDuration  uint64
-	AudioTotalDuration  uint64
-	AudioPTS            uint64
-	Start               bool
-	SPSNALUs            [][]byte // SPS NALUs for H264
-	PPSNALUs            [][]byte // PPS NALUs for H264
-	VPSNALUs            [][]byte // VPS NALUs for H264
-	FreeBoxSize         int64
-	FragmentStartRawPTS uint64            // Raw PTS for timing when to flush fragments
-	FragmentStartDTS    uint64            // Accumulated VideoTotalDuration at fragment start (matches tfdt)
-	MoofBoxes           int64             // Number of moof boxes in the file
-	MoofBoxSizes        []int64           // Sizes of each moof box
-	SegmentDurations    []uint64          // Duration of each segment in timescale units
-	SegmentBaseDecTimes []uint64          // Base decode time of each segment
-	StartTime           uint64            // Start time of the MP4 file
-	VideoTrackName      string            // Name of the video track
-	VideoTrack          int               // Track ID for the video track
-	AudioTrackName      string            // Name of the audio track
-	AudioTrack          int               // Track ID for the audio track
-	VideoFullSample     *mp4ff.FullSample // Full sample for video track
-	AudioFullSample     *mp4ff.FullSample // Full sample for audio track
-	LastAudioSampleDTS  uint64            // Last PTS for audio sample
-	LastVideoSampleDTS  uint64            // Last PTS for video sample
-	SampleType          string            // Type of the sample (e.g., "video", "audio", "subtitle")
+	FileName                string
+	width                   int
+	height                  int
+	Segments                []*mp4ff.MediaSegment // List of media segments
+	Segment                 *mp4ff.MediaSegment
+	MultiTrackFragment      *mp4ff.Fragment
+	TrackIDs                []uint32
+	FileWriter              *os.File
+	Writer                  *bufio.Writer
+	SegmentCount            int
+	SampleCount             int
+	StartPTS                uint64
+	VideoTotalDuration      uint64
+	AudioTotalDuration      uint64
+	AudioPTS                uint64
+	Start                   bool
+	SPSNALUs                [][]byte // SPS NALUs for H264
+	PPSNALUs                [][]byte // PPS NALUs for H264
+	VPSNALUs                [][]byte // VPS NALUs for H264
+	FreeBoxSize             int64
+	FragmentStartRawPTS     uint64            // Raw PTS for timing when to flush fragments
+	FragmentStartDTS        uint64            // Accumulated VideoTotalDuration at fragment start (matches tfdt)
+	MoofBoxes               int64             // Number of moof boxes in the file
+	MoofBoxSizes            []int64           // Sizes of each moof box
+	SegmentDurations        []uint64          // Duration of each segment in timescale units
+	SegmentBaseDecTimes     []uint64          // Base decode time of each segment
+	StartTime               uint64            // Start time of the MP4 file
+	VideoTrackName          string            // Name of the video track
+	VideoTrack              int               // Track ID for the video track
+	AudioTrackName          string            // Name of the audio track
+	AudioTrack              int               // Track ID for the audio track
+	VideoFullSample         *mp4ff.FullSample // Full sample for video track
+	AudioFullSample         *mp4ff.FullSample // Full sample for audio track
+	LastAudioSampleDTS      uint64            // Last PTS for audio sample
+	LastVideoSampleDTS      uint64            // Last PTS for video sample
+	SampleType              string            // Type of the sample (e.g., "video", "audio", "subtitle")
+	TotalKeyframesReceived  int               // Total keyframes received by AddSampleToTrack
+	TotalKeyframesWritten   int               // Total keyframes written to trun boxes
+	FragmentKeyframeCount   int               // Keyframes in the current fragment
+	PendingSampleIsKeyframe bool              // Whether the pending video sample is a keyframe
 }
 
 // NewMP4 creates a new MP4 object.
@@ -150,6 +159,68 @@ func (mp4 *MP4) AddAudioTrack(codec string) uint32 {
 func (mp4 *MP4) AddMediaSegment(segNr int) {
 }
 
+// updateVideoParameterSetsFromAnnexB inspects Annex B data to fill missing SPS/PPS/VPS.
+func (mp4 *MP4) updateVideoParameterSetsFromAnnexB(data []byte) {
+	if len(data) == 0 {
+		return
+	}
+
+	needSPS := len(mp4.SPSNALUs) == 0
+	needPPS := len(mp4.PPSNALUs) == 0
+	needVPS := len(mp4.VPSNALUs) == 0
+	if !(needSPS || needPPS || needVPS) {
+		return
+	}
+
+	for _, nalu := range splitNALUs(data) {
+		nalu = removeAnnexBStartCode(nalu)
+		if len(nalu) == 0 {
+			continue
+		}
+
+		switch mp4.VideoTrackName {
+		case "H264", "AVC1":
+			nalType := nalu[0] & 0x1F
+			switch nalType {
+			case 7: // SPS
+				if needSPS {
+					mp4.SPSNALUs = [][]byte{nalu}
+					needSPS = false
+					log.Log.Warning("mp4.updateVideoParameterSetsFromAnnexB(): SPS recovered from in-band NALU")
+				}
+			case 8: // PPS
+				if needPPS {
+					mp4.PPSNALUs = [][]byte{nalu}
+					needPPS = false
+					log.Log.Warning("mp4.updateVideoParameterSetsFromAnnexB(): PPS recovered from in-band NALU")
+				}
+			}
+		case "H265", "HVC1":
+			nalType := (nalu[0] >> 1) & 0x3F
+			switch nalType {
+			case 32: // VPS
+				if needVPS {
+					mp4.VPSNALUs = [][]byte{nalu}
+					needVPS = false
+					log.Log.Warning("mp4.updateVideoParameterSetsFromAnnexB(): VPS recovered from in-band NALU")
+				}
+			case 33: // SPS
+				if needSPS {
+					mp4.SPSNALUs = [][]byte{nalu}
+					needSPS = false
+					log.Log.Warning("mp4.updateVideoParameterSetsFromAnnexB(): SPS recovered from in-band NALU")
+				}
+			case 34: // PPS
+				if needPPS {
+					mp4.PPSNALUs = [][]byte{nalu}
+					needPPS = false
+					log.Log.Warning("mp4.updateVideoParameterSetsFromAnnexB(): PPS recovered from in-band NALU")
+				}
+			}
+		}
+	}
+}
+
 // flushPendingVideoSample writes the pending video sample to the current fragment.
 // If nextPTS is provided (non-zero), it calculates duration from the PTS difference.
 // If nextPTS is 0 (e.g., at Close time), it uses the last known duration.
@@ -178,20 +249,33 @@ func (mp4 *MP4) flushPendingVideoSample(nextPTS uint64) bool {
 	mp4.VideoFullSample.DecodeTime = mp4.VideoTotalDuration - duration
 	mp4.VideoFullSample.Sample.Dur = uint32(duration)
 
+	isKF := mp4.PendingSampleIsKeyframe
 	err := mp4.MultiTrackFragment.AddFullSampleToTrack(*mp4.VideoFullSample, uint32(mp4.VideoTrack))
 	if err != nil {
 		log.Log.Error("mp4.flushPendingVideoSample(): error adding sample: " + err.Error())
 	}
+	if isKF {
+		mp4.TotalKeyframesWritten++
+		mp4.FragmentKeyframeCount++
+		log.Log.Debug(fmt.Sprintf("mp4.flushPendingVideoSample(): KEYFRAME WRITTEN to trun - totalWritten=%d, fragmentKF=%d, flags=0x%08x, dur=%d, DTS=%d",
+			mp4.TotalKeyframesWritten, mp4.FragmentKeyframeCount, mp4.VideoFullSample.Sample.Flags, duration, mp4.VideoFullSample.DecodeTime))
+	}
 
 	mp4.VideoFullSample = nil
+	mp4.PendingSampleIsKeyframe = false
 	return true
 }
 
 func (mp4 *MP4) AddSampleToTrack(trackID uint32, isKeyframe bool, data []byte, pts uint64) error {
 
 	if isKeyframe && trackID == uint32(mp4.VideoTrack) {
-		log.Log.Debug(fmt.Sprintf("mp4.AddSampleToTrack(): KEYFRAME received - track=%d, PTS=%d, size=%d, sampleCount=%d",
-			trackID, pts, len(data), mp4.SampleCount))
+		mp4.TotalKeyframesReceived++
+		elapsedDbg := uint64(0)
+		if mp4.Start {
+			elapsedDbg = pts - mp4.FragmentStartRawPTS
+		}
+		log.Log.Debug(fmt.Sprintf("mp4.AddSampleToTrack(): KEYFRAME #%d received - PTS=%d, size=%d, elapsed=%dms, started=%t, segment=%d, fragKF=%d",
+			mp4.TotalKeyframesReceived, pts, len(data), elapsedDbg, mp4.Start, mp4.SegmentCount, mp4.FragmentKeyframeCount))
 	}
 
 	if isKeyframe {
@@ -215,6 +299,8 @@ func (mp4 *MP4) AddSampleToTrack(trackID uint32, isKeyframe bool, data []byte, p
 					mp4.flushPendingVideoSample(pts)
 				}
 
+				log.Log.Debug(fmt.Sprintf("mp4.AddSampleToTrack(): FLUSHING segment #%d - keyframes_in_fragment=%d, totalKF_received=%d, totalKF_written=%d",
+					mp4.SegmentCount, mp4.FragmentKeyframeCount, mp4.TotalKeyframesReceived, mp4.TotalKeyframesWritten))
 				mp4.MoofBoxes = mp4.MoofBoxes + 1
 				mp4.MoofBoxSizes = append(mp4.MoofBoxSizes, int64(mp4.Segment.Size()))
 				// Track the segment's duration and base decode time for sidx.
@@ -253,12 +339,14 @@ func (mp4 *MP4) AddSampleToTrack(trackID uint32, isKeyframe bool, data []byte, p
 			mp4.StartPTS = pts
 			mp4.FragmentStartRawPTS = pts
 			mp4.FragmentStartDTS = mp4.VideoTotalDuration
+			mp4.FragmentKeyframeCount = 0 // Reset keyframe counter for new fragment
 		}
 	}
 
 	if mp4.Start {
 
 		if trackID == uint32(mp4.VideoTrack) {
+			mp4.updateVideoParameterSetsFromAnnexB(data)
 
 			var lengthPrefixed []byte
 			var err error
@@ -290,6 +378,7 @@ func (mp4 *MP4) AddSampleToTrack(trackID uint32, isKeyframe bool, data []byte, p
 					CompositionTimeOffset: 0, // No composition time offset for video
 				}
 				mp4.VideoFullSample = &fullSample
+				mp4.PendingSampleIsKeyframe = isKeyframe
 				mp4.SampleType = "video"
 			}
 		} else if trackID == uint32(mp4.AudioTrack) {
@@ -339,8 +428,16 @@ func (mp4 *MP4) AddSampleToTrack(trackID uint32, isKeyframe bool, data []byte, p
 
 func (mp4 *MP4) Close(config *models.Config) {
 
+	log.Log.Info(fmt.Sprintf("mp4.Close(): KEYFRAME SUMMARY - totalReceived=%d, totalWritten=%d, segments=%d, lastFragmentKF=%d",
+		mp4.TotalKeyframesReceived, mp4.TotalKeyframesWritten, mp4.SegmentCount, mp4.FragmentKeyframeCount))
+
 	if mp4.VideoTotalDuration == 0 && mp4.AudioTotalDuration == 0 {
-		log.Log.Error("mp4.Close(): no video or audio samples added, cannot create MP4 file")
+		log.Log.Error("mp4.Close(): no video or audio samples added, removing empty MP4 file")
+		mp4.Writer.Flush()
+		_ = mp4.FileWriter.Sync()
+		_ = mp4.FileWriter.Close()
+		_ = os.Remove(mp4.FileName)
+		return
 	}
 
 	// Add final pending samples before closing
@@ -412,22 +509,50 @@ func (mp4 *MP4) Close(config *models.Config) {
 	moov := mp4ff.NewMoovBox()
 	init.AddChild(moov)
 
-	// Set the creation time and modification time for the moov box
+	// Compute the actual video duration by summing segment durations.
+	// This must exactly match the sum of sample durations in the trun boxes
+	// that were written to the file, ensuring QuickTime (which strictly trusts
+	// header durations) displays the correct value.
+	var actualVideoDuration uint64
+	for _, d := range mp4.SegmentDurations {
+		actualVideoDuration += d
+	}
+	if actualVideoDuration != mp4.VideoTotalDuration {
+		log.Log.Warning(fmt.Sprintf("mp4.Close(): duration mismatch: accumulated VideoTotalDuration=%d, sum of segment durations=%d (diff=%d ms)",
+			mp4.VideoTotalDuration, actualVideoDuration, int64(mp4.VideoTotalDuration)-int64(actualVideoDuration)))
+	}
+
+	// Set the creation time and modification time for the moov box.
+	// QuickTime requires timestamps in Mac HFS format (seconds since 1904-01-01),
+	// so we convert from Unix epoch by adding MacEpochOffset.
 	videoTimescale := uint32(1000)
 	audioTimescale := uint32(1000)
+	macTime := mp4.StartTime + MacEpochOffset
+	nextTrackID := uint32(len(mp4.TrackIDs) + 1)
+
+	// mvhd.Duration must be the duration of the longest track.
+	// Start with video; if audio is longer, we update below.
+	movDuration := actualVideoDuration
+	if mp4.AudioTotalDuration > movDuration {
+		movDuration = mp4.AudioTotalDuration
+	}
+
 	mvhd := &mp4ff.MvhdBox{
 		Version:          0,
 		Flags:            0,
-		CreationTime:     mp4.StartTime,
-		ModificationTime: mp4.StartTime,
+		CreationTime:     macTime,
+		ModificationTime: macTime,
 		Timescale:        videoTimescale,
-		Duration:         mp4.VideoTotalDuration,
+		Duration:         movDuration,
+		Rate:             0x00010000, // 1.0 playback speed (16.16 fixed point)
+		Volume:           0x0100,     // 1.0 full volume (8.8 fixed point)
+		NextTrackID:      nextTrackID,
 	}
 	init.Moov.AddChild(mvhd)
 
 	// Set the total duration in the moov box
 	mvex := mp4ff.NewMvexBox()
-	mvex.AddChild(&mp4ff.MehdBox{FragmentDuration: int64(mp4.VideoTotalDuration)})
+	mvex.AddChild(&mp4ff.MehdBox{FragmentDuration: int64(movDuration)})
 	init.Moov.AddChild(mvex)
 
 	// Add a track for the video
@@ -435,29 +560,52 @@ func (mp4 *MP4) Close(config *models.Config) {
 	case "H264", "AVC1":
 		init.AddEmptyTrack(videoTimescale, "video", "und")
 		includePS := true
-		err := init.Moov.Traks[0].SetAVCDescriptor("avc1", mp4.SPSNALUs, mp4.PPSNALUs, includePS)
+		spsNALUs, ppsNALUs := normalizeH264ParameterSets(mp4.SPSNALUs, mp4.PPSNALUs)
+		log.Log.Debug("mp4.Close(): AVC parameter sets: SPS=" + formatNaluDebug(spsNALUs) + ", PPS=" + formatNaluDebug(ppsNALUs))
+		err := init.Moov.Traks[0].SetAVCDescriptor("avc1", spsNALUs, ppsNALUs, includePS)
 		if err != nil {
+			log.Log.Error("mp4.Close(): error setting AVC descriptor: " + err.Error())
+			if fallbackErr := addAVCDescriptorFallback(init.Moov.Traks[0], spsNALUs, ppsNALUs, uint16(mp4.width), uint16(mp4.height)); fallbackErr != nil {
+				log.Log.Error("mp4.Close(): error setting AVC descriptor fallback: " + fallbackErr.Error())
+			} else {
+				log.Log.Warning("mp4.Close(): AVC descriptor fallback used due to SPS parse error")
+			}
 		}
-		init.Moov.Traks[0].Tkhd.Duration = mp4.VideoTotalDuration
+		init.Moov.Traks[0].Tkhd.Duration = actualVideoDuration
 		init.Moov.Traks[0].Tkhd.Width = mp4ff.Fixed32(uint32(mp4.width) << 16)
 		init.Moov.Traks[0].Tkhd.Height = mp4ff.Fixed32(uint32(mp4.height) << 16)
+		init.Moov.Traks[0].Tkhd.CreationTime = macTime
+		init.Moov.Traks[0].Tkhd.ModificationTime = macTime
 		init.Moov.Traks[0].Mdia.Hdlr.Name = "agent " + utils.VERSION
-		init.Moov.Traks[0].Mdia.Mdhd.Duration = mp4.VideoTotalDuration
+		// mdhd.Duration MUST be 0 for fragmented MP4. QuickTime adds mdhd.Duration
+		// to the fragment durations (mehd/sidx), so setting it non-zero doubles the
+		// reported duration. Leave it at 0 so the player derives duration from fragments.
+		init.Moov.Traks[0].Mdia.Mdhd.Duration = 0
+		init.Moov.Traks[0].Mdia.Mdhd.CreationTime = macTime
+		init.Moov.Traks[0].Mdia.Mdhd.ModificationTime = macTime
 	case "H265", "HVC1":
 		init.AddEmptyTrack(videoTimescale, "video", "und")
 		includePS := true
-		err := init.Moov.Traks[0].SetHEVCDescriptor("hvc1", mp4.VPSNALUs, mp4.SPSNALUs, mp4.PPSNALUs, [][]byte{}, includePS)
+		vpsNALUs, spsNALUs, ppsNALUs := normalizeH265ParameterSets(mp4.VPSNALUs, mp4.SPSNALUs, mp4.PPSNALUs)
+		log.Log.Debug("mp4.Close(): HEVC parameter sets: VPS=" + formatNaluDebug(vpsNALUs) + ", SPS=" + formatNaluDebug(spsNALUs) + ", PPS=" + formatNaluDebug(ppsNALUs))
+		err := init.Moov.Traks[0].SetHEVCDescriptor("hvc1", vpsNALUs, spsNALUs, ppsNALUs, [][]byte{}, includePS)
 		if err != nil {
+			log.Log.Error("mp4.Close(): error setting HEVC descriptor: " + err.Error())
 		}
-		init.Moov.Traks[0].Tkhd.Duration = mp4.VideoTotalDuration
+		init.Moov.Traks[0].Tkhd.Duration = actualVideoDuration
 		init.Moov.Traks[0].Tkhd.Width = mp4ff.Fixed32(uint32(mp4.width) << 16)
 		init.Moov.Traks[0].Tkhd.Height = mp4ff.Fixed32(uint32(mp4.height) << 16)
+		init.Moov.Traks[0].Tkhd.CreationTime = macTime
+		init.Moov.Traks[0].Tkhd.ModificationTime = macTime
 		init.Moov.Traks[0].Mdia.Hdlr.Name = "agent " + utils.VERSION
-		init.Moov.Traks[0].Mdia.Mdhd.Duration = mp4.VideoTotalDuration
+		// mdhd.Duration MUST be 0 for fragmented MP4 (see H264 case above).
+		init.Moov.Traks[0].Mdia.Mdhd.Duration = 0
+		init.Moov.Traks[0].Mdia.Mdhd.CreationTime = macTime
+		init.Moov.Traks[0].Mdia.Mdhd.ModificationTime = macTime
 	}
 
-	// Try adding audio track if available
-	if mp4.AudioTrackName == "AAC" || mp4.AudioTrackName == "MP4A" {
+	// Try adding audio track if available and samples were recorded.
+	if (mp4.AudioTrackName == "AAC" || mp4.AudioTrackName == "MP4A") && mp4.AudioTotalDuration > 0 {
 		// Add an audio track to the moov box
 		init.AddEmptyTrack(audioTimescale, "audio", "und")
 
@@ -471,8 +619,13 @@ func (mp4 *MP4) Close(config *models.Config) {
 		if err != nil {
 		}
 		init.Moov.Traks[1].Tkhd.Duration = mp4.AudioTotalDuration
+		init.Moov.Traks[1].Tkhd.CreationTime = macTime
+		init.Moov.Traks[1].Tkhd.ModificationTime = macTime
 		init.Moov.Traks[1].Mdia.Hdlr.Name = "agent " + utils.VERSION
-		init.Moov.Traks[1].Mdia.Mdhd.Duration = mp4.AudioTotalDuration
+		// mdhd.Duration MUST be 0 for fragmented MP4 (see video track comment).
+		init.Moov.Traks[1].Mdia.Mdhd.Duration = 0
+		init.Moov.Traks[1].Mdia.Mdhd.CreationTime = macTime
+		init.Moov.Traks[1].Mdia.Mdhd.ModificationTime = macTime
 	}
 
 	// Try adding subtitle track if available
@@ -503,9 +656,11 @@ func (mp4 *MP4) Close(config *models.Config) {
 	// and encrypted with the public key.
 
 	fingerprint := fmt.Sprintf("%d", init.Moov.Mvhd.CreationTime) + "_" +
-		fmt.Sprintf("%d", init.Moov.Mvhd.Duration) + "_" +
-		init.Moov.Trak.Mdia.Hdlr.Name + "_" +
-		fmt.Sprintf("%d", mp4.MoofBoxes) + "_" // Number of moof boxes
+		fmt.Sprintf("%d", init.Moov.Mvhd.Duration) + "_"
+	if init.Moov.Trak != nil {
+		fingerprint += init.Moov.Trak.Mdia.Hdlr.Name + "_"
+	}
+	fingerprint += fmt.Sprintf("%d", mp4.MoofBoxes) + "_" // Number of moof boxes
 
 	for i, size := range mp4.MoofBoxSizes {
 		fingerprint += fmt.Sprintf("%d", size)
@@ -519,7 +674,10 @@ func (mp4 *MP4) Close(config *models.Config) {
 	}
 
 	// Load the private key from the configuration
-	privateKey := config.Signing.PrivateKey
+	var privateKey string
+	if config.Signing != nil {
+		privateKey = config.Signing.PrivateKey
+	}
 	r := strings.NewReader(privateKey)
 	pemBytes, _ := ioutil.ReadAll(r)
 	block, _ := pem.Decode(pemBytes)
@@ -685,6 +843,172 @@ func removeAnnexBStartCode(nalu []byte) []byte {
 	return nalu
 }
 
+// sanitizeParameterSets removes Annex B start codes and drops empty NALUs.
+func sanitizeParameterSets(nalus [][]byte) [][]byte {
+	if len(nalus) == 0 {
+		return nalus
+	}
+	clean := make([][]byte, 0, len(nalus))
+	for _, nalu := range nalus {
+		trimmed := removeAnnexBStartCode(nalu)
+		if len(trimmed) == 0 {
+			continue
+		}
+		clean = append(clean, trimmed)
+	}
+	return clean
+}
+
+// normalizeH264ParameterSets splits Annex B blobs and extracts SPS/PPS NALUs.
+func normalizeH264ParameterSets(spsIn [][]byte, ppsIn [][]byte) ([][]byte, [][]byte) {
+	all := make([][]byte, 0, len(spsIn)+len(ppsIn))
+	all = append(all, spsIn...)
+	all = append(all, ppsIn...)
+	var spsOut [][]byte
+	var ppsOut [][]byte
+	for _, blob := range all {
+		for _, nalu := range splitParamSetNALUs(blob) {
+			nalu = removeAnnexBStartCode(nalu)
+			if len(nalu) == 0 {
+				continue
+			}
+			typ := nalu[0] & 0x1F
+			switch typ {
+			case 7:
+				spsOut = append(spsOut, nalu)
+			case 8:
+				ppsOut = append(ppsOut, nalu)
+			}
+		}
+	}
+	if len(spsOut) == 0 {
+		spsOut = sanitizeParameterSets(spsIn)
+	}
+	if len(ppsOut) == 0 {
+		ppsOut = sanitizeParameterSets(ppsIn)
+	}
+	return spsOut, ppsOut
+}
+
+// normalizeH265ParameterSets splits Annex B blobs and extracts VPS/SPS/PPS NALUs.
+func normalizeH265ParameterSets(vpsIn [][]byte, spsIn [][]byte, ppsIn [][]byte) ([][]byte, [][]byte, [][]byte) {
+	all := make([][]byte, 0, len(vpsIn)+len(spsIn)+len(ppsIn))
+	all = append(all, vpsIn...)
+	all = append(all, spsIn...)
+	all = append(all, ppsIn...)
+	var vpsOut [][]byte
+	var spsOut [][]byte
+	var ppsOut [][]byte
+	for _, blob := range all {
+		for _, nalu := range splitParamSetNALUs(blob) {
+			nalu = removeAnnexBStartCode(nalu)
+			if len(nalu) == 0 {
+				continue
+			}
+			typ := (nalu[0] >> 1) & 0x3F
+			switch typ {
+			case 32:
+				vpsOut = append(vpsOut, nalu)
+			case 33:
+				spsOut = append(spsOut, nalu)
+			case 34:
+				ppsOut = append(ppsOut, nalu)
+			}
+		}
+	}
+	if len(vpsOut) == 0 {
+		vpsOut = sanitizeParameterSets(vpsIn)
+	}
+	if len(spsOut) == 0 {
+		spsOut = sanitizeParameterSets(spsIn)
+	}
+	if len(ppsOut) == 0 {
+		ppsOut = sanitizeParameterSets(ppsIn)
+	}
+	return vpsOut, spsOut, ppsOut
+}
+
+// splitParamSetNALUs splits Annex B parameter set blobs; raw NALUs are returned as-is.
+func splitParamSetNALUs(blob []byte) [][]byte {
+	if len(blob) == 0 {
+		return nil
+	}
+	if findStartCode(blob, 0) >= 0 {
+		return splitNALUs(blob)
+	}
+	return [][]byte{blob}
+}
+
+func formatNaluDebug(nalus [][]byte) string {
+	if len(nalus) == 0 {
+		return "none"
+	}
+	parts := make([]string, 0, len(nalus))
+	for _, nalu := range nalus {
+		if len(nalu) == 0 {
+			parts = append(parts, "len=0")
+			continue
+		}
+		max := 8
+		if len(nalu) < max {
+			max = len(nalu)
+		}
+		parts = append(parts, fmt.Sprintf("len=%d head=%x", len(nalu), nalu[:max]))
+	}
+	return strings.Join(parts, "; ")
+}
+
+func addAVCDescriptorFallback(trak *mp4ff.TrakBox, spsNALUs, ppsNALUs [][]byte, width, height uint16) error {
+	if trak == nil || trak.Mdia == nil || trak.Mdia.Minf == nil || trak.Mdia.Minf.Stbl == nil || trak.Mdia.Minf.Stbl.Stsd == nil {
+		return fmt.Errorf("missing trak stsd")
+	}
+	if len(spsNALUs) == 0 {
+		return fmt.Errorf("no SPS NALU available")
+	}
+	decConfRec, err := buildAVCDecConfRecFromSPS(spsNALUs, ppsNALUs)
+	if err != nil {
+		return err
+	}
+	if width == 0 && trak.Tkhd != nil {
+		width = uint16(uint32(trak.Tkhd.Width) >> 16)
+	}
+	if height == 0 && trak.Tkhd != nil {
+		height = uint16(uint32(trak.Tkhd.Height) >> 16)
+	}
+	if width > 0 && height > 0 && trak.Tkhd != nil {
+		trak.Tkhd.Width = mp4ff.Fixed32(uint32(width) << 16)
+		trak.Tkhd.Height = mp4ff.Fixed32(uint32(height) << 16)
+	}
+	avcC := &mp4ff.AvcCBox{DecConfRec: *decConfRec}
+	avcx := mp4ff.CreateVisualSampleEntryBox("avc1", width, height, avcC)
+	trak.Mdia.Minf.Stbl.Stsd.AddChild(avcx)
+	return nil
+}
+
+func buildAVCDecConfRecFromSPS(spsNALUs, ppsNALUs [][]byte) (*avc.DecConfRec, error) {
+	if len(spsNALUs) == 0 {
+		return nil, fmt.Errorf("no SPS NALU available")
+	}
+	sps := spsNALUs[0]
+	if len(sps) < 4 {
+		return nil, fmt.Errorf("SPS too short: len=%d", len(sps))
+	}
+	// SPS NALU: byte 0 is NAL header, next 3 bytes are profile/compat/level.
+	dec := &avc.DecConfRec{
+		AVCProfileIndication: sps[1],
+		ProfileCompatibility: sps[2],
+		AVCLevelIndication:   sps[3],
+		SPSnalus:             spsNALUs,
+		PPSnalus:             ppsNALUs,
+		ChromaFormat:         1,
+		BitDepthLumaMinus1:   0,
+		BitDepthChromaMinus1: 0,
+		NumSPSExt:            0,
+		NoTrailingInfo:       true,
+	}
+	return dec, nil
+}
+
 // splitNALUs splits Annex B data into raw NAL units without start codes.
 func splitNALUs(data []byte) [][]byte {
 	var nalus [][]byte

machinery/src/video/mp4_duration_test.go

@@ -0,0 +1,176 @@
+package video
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	mp4ff "github.com/Eyevinn/mp4ff/mp4"
+	"github.com/kerberos-io/agent/machinery/src/models"
+)
+
+// TestMP4Duration creates an MP4 file simulating a 5-second video recording
+// and verifies that the durations in all boxes match the sum of sample durations.
+func TestMP4Duration(t *testing.T) {
+	tmpFile := "/tmp/test_duration.mp4"
+	defer os.Remove(tmpFile)
+
+	// Minimal SPS for H.264 (baseline, 640x480) - proper Annex B format with start code
+	sps := []byte{0x67, 0x42, 0xc0, 0x1e, 0xd9, 0x00, 0xa0, 0x47, 0xfe, 0xc8}
+	pps := []byte{0x68, 0xce, 0x38, 0x80}
+
+	mp4Video := NewMP4(tmpFile, [][]byte{sps}, [][]byte{pps}, nil, 10)
+	mp4Video.SetWidth(640)
+	mp4Video.SetHeight(480)
+	videoTrack := mp4Video.AddVideoTrack("H264")
+
+	// Simulate 5 seconds at 25fps (200 frames, keyframe every 50 frames = 2s)
+	// PTS in milliseconds (timescale=1000)
+	frameDuration := uint64(40) // 40ms per frame = 25fps
+	numFrames := 150
+	gopSize := 50
+
+	// Create a fake Annex B NAL unit (keyframe IDR = type 5, non-keyframe = type 1)
+	makeFrame := func(isKey bool) []byte {
+		nalType := byte(0x01) // non-IDR slice
+		if isKey {
+			nalType = 0x65 // IDR slice
+		}
+		// Start code (4 bytes) + NAL header + some data
+		frame := []byte{0x00, 0x00, 0x00, 0x01, nalType}
+		// Add some padding data
+		for i := 0; i < 100; i++ {
+			frame = append(frame, byte(i))
+		}
+		return frame
+	}
+
+	var expectedDuration uint64
+	for i := 0; i < numFrames; i++ {
+		pts := uint64(i) * frameDuration
+		isKeyframe := i%gopSize == 0
+		err := mp4Video.AddSampleToTrack(videoTrack, isKeyframe, makeFrame(isKeyframe), pts)
+		if err != nil {
+			t.Fatalf("AddSampleToTrack failed at frame %d: %v", i, err)
+		}
+	}
+	expectedDuration = uint64(numFrames) * frameDuration // Should be 6000ms (150 * 40)
+
+	// Close with config that has signing key to avoid nil panics
+	config := &models.Config{
+		Signing: &models.Signing{
+			PrivateKey: "",
+		},
+	}
+	mp4Video.Close(config)
+
+	// Log what the code computed
+	t.Logf("VideoTotalDuration: %d ms", mp4Video.VideoTotalDuration)
+	t.Logf("Expected duration:  %d ms", expectedDuration)
+	t.Logf("Segments: %d", len(mp4Video.SegmentDurations))
+	var sumSegDur uint64
+	for i, d := range mp4Video.SegmentDurations {
+		t.Logf("  Segment %d: duration=%d ms", i, d)
+		sumSegDur += d
+	}
+	t.Logf("Sum of segment durations: %d ms", sumSegDur)
+
+	// Now read back the file and inspect the boxes
+	f, err := os.Open(tmpFile)
+	if err != nil {
+		t.Fatalf("Failed to open output file: %v", err)
+	}
+	defer f.Close()
+
+	fi, err := f.Stat()
+	if err != nil {
+		t.Fatalf("Failed to stat output file: %v", err)
+	}
+
+	parsedFile, err := mp4ff.DecodeFile(f)
+	if err != nil {
+		t.Fatalf("Failed to decode MP4: %v", err)
+	}
+
+	t.Logf("File size: %d bytes", fi.Size())
+
+	// Check moov box
+	if parsedFile.Moov == nil {
+		t.Fatal("No moov box found")
+	}
+
+	// Check mvhd duration
+	mvhd := parsedFile.Moov.Mvhd
+	t.Logf("mvhd.Duration:  %d (timescale=%d) = %.2f seconds", mvhd.Duration, mvhd.Timescale, float64(mvhd.Duration)/float64(mvhd.Timescale))
+	t.Logf("mvhd.Rate:      0x%08x", mvhd.Rate)
+	t.Logf("mvhd.Volume:    0x%04x", mvhd.Volume)
+
+	// Check each trak
+	for i, trak := range parsedFile.Moov.Traks {
+		t.Logf("Track %d:", i)
+		t.Logf("  tkhd.Duration: %d", trak.Tkhd.Duration)
+		t.Logf("  mdhd.Duration: %d (timescale=%d) = %.2f seconds", trak.Mdia.Mdhd.Duration, trak.Mdia.Mdhd.Timescale, float64(trak.Mdia.Mdhd.Duration)/float64(trak.Mdia.Mdhd.Timescale))
+	}
+
+	// Check mvex/mehd
+	if parsedFile.Moov.Mvex != nil && parsedFile.Moov.Mvex.Mehd != nil {
+		t.Logf("mehd.FragmentDuration: %d", parsedFile.Moov.Mvex.Mehd.FragmentDuration)
+	}
+
+	// Sum up actual sample durations from trun boxes in all segments
+	var actualTrunDuration uint64
+	var sampleCount int
+	for _, seg := range parsedFile.Segments {
+		for _, frag := range seg.Fragments {
+			for _, traf := range frag.Moof.Trafs {
+				// Only count video track (track 1)
+				if traf.Tfhd.TrackID == 1 {
+					for _, trun := range traf.Truns {
+						for _, s := range trun.Samples {
+							actualTrunDuration += uint64(s.Dur)
+							sampleCount++
+						}
+					}
+				}
+			}
+		}
+	}
+	t.Logf("Actual trun sample count: %d", sampleCount)
+	t.Logf("Actual trun total duration: %d ms", actualTrunDuration)
+
+	// Check sidx
+	if parsedFile.Sidx != nil {
+		var sidxDuration uint64
+		for _, ref := range parsedFile.Sidx.SidxRefs {
+			sidxDuration += uint64(ref.SubSegmentDuration)
+		}
+		t.Logf("sidx total duration: %d ms", sidxDuration)
+	}
+
+	// VERIFY: All duration values should be consistent
+	// The expected duration for 150 frames at 40ms each:
+	// - The sample-buffering pattern means the LAST sample uses LastVideoSampleDTS as duration
+	// - So all 150 samples should produce 150 * 40ms = 6000ms total
+	// But due to the pending sample pattern, the actual trun durations might differ
+
+	fmt.Println()
+	fmt.Println("=== DURATION CONSISTENCY CHECK ===")
+	fmt.Printf("Expected (150 * 40ms):      %d ms\n", expectedDuration)
+	fmt.Printf("mvhd.Duration:              %d ms\n", mvhd.Duration)
+	fmt.Printf("tkhd.Duration:              %d ms\n", parsedFile.Moov.Traks[0].Tkhd.Duration)
+	fmt.Printf("mdhd.Duration:              %d ms\n", parsedFile.Moov.Traks[0].Mdia.Mdhd.Duration)
+	fmt.Printf("Actual trun durations sum:  %d ms\n", actualTrunDuration)
+	fmt.Printf("VideoTotalDuration:         %d ms\n", mp4Video.VideoTotalDuration)
+	fmt.Printf("Sum of SegmentDurations:    %d ms\n", sumSegDur)
+	fmt.Println()
+
+	// The key assertion: header duration must equal trun sum
+	if mvhd.Duration != actualTrunDuration {
+		t.Errorf("MISMATCH: mvhd.Duration (%d) != actual trun sum (%d), diff = %d ms",
+			mvhd.Duration, actualTrunDuration, int64(mvhd.Duration)-int64(actualTrunDuration))
+	}
+	if parsedFile.Moov.Traks[0].Mdia.Mdhd.Duration != 0 {
+		t.Errorf("MISMATCH: mdhd.Duration should be 0 for fragmented MP4, got %d",
+			parsedFile.Moov.Traks[0].Mdia.Mdhd.Duration)
+	}
+}