Fix #2570, remove useless audio track info in PMT when no audio

.github/ISSUE_TEMPLATE

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+---
+name: File bug
+about: File bug to improve SRS
+title: ''
+labels: ''
+assignees: 'winlinvip'
+
+---
+
+> 注意：提问前，请先看FAQ(Please read FAQ before file an issue) https://github.com/ossrs/srs/issues/2716
+
+**描述(Description)**
+
+> 描述你遇到了什么问题(Please description your issue here)
+
+1. SRS版本(Version): `xxxxxx`
+
+1. SRS的日志如下(Log):
+```
+
+xxxxxxxxxxxx
+
+```
+
+1. SRS的配置如下(Config):
+```
+
+xxxxxxxxxxxx
+
+```
+
+**重现(Replay)**
+
+> 重现Bug的步骤(How to replay bug?)
+
+1. `xxxxxx`
+1. `xxxxxx`
+1. `xxxxxx`
+
+**期望行为(Expect)**
+
+> 描述你期望发生的事情(Please describe your expectation)

.github/workflows/codeql-analysis.yml

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+name: "CodeQL"
+
+# @see https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#onpushpull_requestbranchestags
+on: [push, pull_request]
+
+jobs:
+  analyze:
+    name: actions-codeql-analyze
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'cpp' ]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v1
+        with:
+          languages: ${{ matrix.language }}
+
+      - name: Build SRS
+        run: |
+         cd trunk && ./configure && make
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v1

.github/workflows/release.yml

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+name: "Release"
+
+# @see https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#onpushpull_requestbranchestags
+on:
+  push:
+    tags:
+      - v5*
+
+jobs:
+  k8s:
+    name: release-k8s
+    runs-on: ubuntu-20.04
+
+    steps:
+      ################################################################
+      # Git checkout
+      - name: Checkout repository
+        uses: actions/checkout@v2
+      # The github.ref is, for example, refs/tags/v4.0.145 or refs/tags/v4.0-r8
+      # Generate variables like:
+      #   SRS_TAG=v4.0-r8
+      #   SRS_TAG=v4.0.145
+      #   SRS_VERSION=4.0.145
+      #   SRS_VERSION=4.0-r8
+      #   SRS_MAJOR=4
+      # @see https://docs.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-an-environment-variable
+      - name: Generate varaiables
+        run: |
+          SRS_TAG=$(echo ${{ github.ref }}| awk -F '/' '{print $3}')
+          echo "SRS_TAG=$SRS_TAG" >> $GITHUB_ENV
+          SRS_VERSION=$(echo ${SRS_TAG}| sed 's/^v//g')
+          echo "SRS_VERSION=$SRS_VERSION" >> $GITHUB_ENV
+          SRS_MAJOR=$(echo $SRS_TAG| cut -c 2)
+          echo "SRS_MAJOR=$SRS_MAJOR" >> $GITHUB_ENV
+      # Create source tar for release. Note that it's for OpenWRT package srs-server, so the filename MUST be
+      # srs-server-xxx.tar.gz, because the package is named srs-server.
+      # Generate variables like:
+      #   SRS_SOURCE_TAR=srs-server-4.0.145.tar.gz
+      #   SRS_SOURCE_MD5=83e38700a80a26e30b2df054e69956e5
+      - name: Create source tar.gz
+        run: |
+          DEST_DIR=srs-server-$SRS_VERSION && mkdir -p $DEST_DIR &&
+          cp README.md $DEST_DIR && cp LICENSE $DEST_DIR && cp -R trunk $DEST_DIR/trunk &&
+          (cd $DEST_DIR/trunk/3rdparty && rm -rf *.zip openssl-*.gz srs-bench) &&
+          tar zcf ${DEST_DIR}.tar.gz ${DEST_DIR} && du -sh ${DEST_DIR}* && rm -rf ${DEST_DIR} &&
+          echo "SRS_SOURCE_TAR=${DEST_DIR}.tar.gz" >> $GITHUB_ENV &&
+          echo "SRS_SOURCE_MD5=$(md5sum ${DEST_DIR}.tar.gz| awk '{print $1}')" >> $GITHUB_ENV
+      # Create package tar for release
+      # Generate variables like:
+      #   SRS_PACKAGE_ZIP=SRS-CentOS7-x86_64-4.0.145.zip
+      #   SRS_PACKAGE_MD5=3880a26e30b283edf05700a4e69956e5
+      - name: Create package zip
+        run: |
+          docker build --tag srs:pkg --build-arg version=$SRS_VERSION -f trunk/Dockerfile.pkg . &&
+          SRS_PACKAGE_ZIP=SRS-CentOS7-x86_64-$SRS_VERSION.zip &&
+          docker run --rm -v $(pwd):/output srs:pkg cp objs/$SRS_PACKAGE_ZIP /output/ &&
+          du -sh $SRS_PACKAGE_ZIP &&
+          echo "SRS_PACKAGE_ZIP=$SRS_PACKAGE_ZIP" >> $GITHUB_ENV &&
+          echo "SRS_PACKAGE_MD5=$(md5sum $SRS_PACKAGE_ZIP| awk '{print $1}')" >> $GITHUB_ENV
+
+      ################################################################
+      # Tests
+      - name: Build test image
+        run: docker build --tag srs:test -f trunk/Dockerfile.test .
+      # For utest
+      - name: Run SRS utest
+        run: docker run --rm srs:test bash -c 'make utest && ./objs/srs_utest'
+      # For regression-test
+      - name: Run SRS regression-test
+        run: docker run --rm srs:test bash -c 'make && ./objs/srs -c conf/regression-test.conf && cd 3rdparty/srs-bench && make && ./objs/srs_test -test.v'
+
+      ################################################################
+      # Build
+      # Build SRS image
+      - name: Build SRS docker image
+        run: |
+          echo "Release ossrs/srs:$SRS_TAG"
+          docker build --tag ossrs/srs:$SRS_TAG -f trunk/Dockerfile .
+
+      ################################################################
+      # Docker
+      - name: Login docker hub
+        uses: docker/login-action@v1
+        with:
+          username: "${{ secrets.DOCKER_USERNAME }}"
+          password: "${{ secrets.DOCKER_PASSWORD }}"
+      - name: Push to docker hub
+        run: |
+          docker push ossrs/srs:$SRS_TAG
+          docker tag ossrs/srs:$SRS_TAG ossrs/srs:$SRS_MAJOR
+          docker push ossrs/srs:$SRS_MAJOR
+      # Aliyun ACR
+      - name: Login Aliyun docker hub
+        uses: aliyun/acr-login@v1
+        with:
+          login-server: https://registry.cn-hangzhou.aliyuncs.com
+          username: "${{ secrets.ACR_USERNAME }}"
+          password: "${{ secrets.ACR_PASSWORD }}"
+      - name: Push to Aliyun docker hub
+        run: |
+          docker tag ossrs/srs:$SRS_TAG registry.cn-hangzhou.aliyuncs.com/ossrs/srs:$SRS_TAG
+          docker push registry.cn-hangzhou.aliyuncs.com/ossrs/srs:$SRS_TAG
+          docker tag ossrs/srs:$SRS_TAG registry.cn-hangzhou.aliyuncs.com/ossrs/srs:$SRS_VERSION
+          docker push registry.cn-hangzhou.aliyuncs.com/ossrs/srs:$SRS_VERSION
+          docker tag ossrs/srs:$SRS_TAG registry.cn-hangzhou.aliyuncs.com/ossrs/srs:v$SRS_MAJOR
+          docker push registry.cn-hangzhou.aliyuncs.com/ossrs/srs:v$SRS_MAJOR
+          docker tag ossrs/srs:$SRS_TAG registry.cn-hangzhou.aliyuncs.com/ossrs/srs:$SRS_MAJOR
+          docker push registry.cn-hangzhou.aliyuncs.com/ossrs/srs:$SRS_MAJOR
+
+      ################################################################
+      # K8S
+      - name: Setup KUBCONFIG for Aliyun ACK
+        run: |-
+          KUBECONFIG=$RUNNER_TEMP/kubeconfig_$(date +%s)
+          echo "${{ secrets.KUBCONFIG }}" > $KUBECONFIG
+          echo "KUBECONFIG=$KUBECONFIG" >> $GITHUB_ENV
+      # K8S for SRS 4.0
+      - name: Release SRS 4.0 to Aliyun ACK
+        if: ${{ startsWith(github.ref, 'refs/tags/v4') }}
+        run: |-
+          kubectl set image deploy/srs4-deploy srs4=registry.cn-hangzhou.aliyuncs.com/ossrs/srs:$SRS_TAG
+          kubectl describe deploy/srs4-deploy
+
+      ################################################################
+      # Create release.
+      - name: Create release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: Release ${{ github.ref }}
+          body: |
+            ${{ github.event.head_commit.message }}
+            ## Resource
+            * Source: ${{ env.SRS_SOURCE_MD5 }} [${{ env.SRS_SOURCE_TAR }}](https://github.com/ossrs/srs/releases/download/${{ env.SRS_TAG }}/${{ env.SRS_SOURCE_TAR }})
+            * Binary: ${{ env.SRS_PACKAGE_MD5 }} [${{ env.SRS_PACKAGE_ZIP }}](https://github.com/ossrs/srs/releases/download/${{ env.SRS_TAG }}/${{ env.SRS_PACKAGE_ZIP }})
+          draft: false
+          prerelease: true
+      # Upload release source files
+      - name: Upload Release Assets Source
+        id: upload-release-assets-source
+        uses: dwenegar/upload-release-assets@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          release_id: ${{ steps.create_release.outputs.id }}
+          assets_path: ${{ env.SRS_SOURCE_TAR }}
+      # Upload release package files
+      - name: Upload Release Assets Package
+        id: upload-release-assets-package
+        uses: dwenegar/upload-release-assets@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          release_id: ${{ steps.create_release.outputs.id }}
+          assets_path: ${{ env.SRS_PACKAGE_ZIP }}
+

.github/workflows/test.yml

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+name: "Test"
+
+# @see https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#onpushpull_requestbranchestags
+on: [push, pull_request]
+
+jobs:
+  build-centos:
+    name: actions-test-build-centos
+    runs-on: ubuntu-20.04
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      # Build for CentOS7
+      - name: Build on CentOS7, baseline
+        run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target centos7-baseline .
+      - name: Build on CentOS7, with SRT
+        run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target centos7-srt .
+      - name: Build on CentOS7, without WebRTC
+        run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target centos7-no-webrtc .
+      - name: Build on CentOS7, without ASM
+        run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target centos7-no-asm .
+      - name: Build on CentOS7, C++98, no FFmpeg
+        run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target centos7-ansi-no-ffmpeg .
+      # Build for CentOS8
+      - name: Build on CentOS8, baseline
+        run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target centos8-baseline .
+      - name: Build on CentOS8, with SRT
+        run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target centos8-srt .
+
+  build-ubuntu:
+    name: actions-test-build-ubuntu
+    runs-on: ubuntu-20.04
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      # Build for Ubuntu16
+      - name: Build on Ubuntu16, baseline
+        run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target ubuntu16-baseline .
+      - name: Build on Ubuntu16, with SRT
+        run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target ubuntu16-srt .
+      # Build for Ubuntu18
+      - name: Build on Ubuntu18, baseline
+        run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target ubuntu18-baseline .
+      - name: Build on Ubuntu18, with SRT
+        run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target ubuntu18-srt .
+      # Build for Ubuntu20
+      - name: Build on Ubuntu20, baseline
+        run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target ubuntu20-baseline .
+      - name: Build on Ubuntu20, with SRT
+        run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target ubuntu20-srt .
+
+  build-cross:
+    name: actions-test-build-cross
+    runs-on: ubuntu-20.04
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      # Cross Build for ARMv7
+      - name: Cross Build for ARMv7
+        run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target ubuntu16-cross-armv7 .
+      # Cross Build for AARCH64
+      - name: Cross Build for AARCH64
+        run: DOCKER_BUILDKIT=1 docker build -f trunk/Dockerfile.builds --target ubuntu16-cross-aarch64 .
+
+  build:
+    name: actions-test-build
+    needs:
+      - build-centos
+      - build-ubuntu
+      - build-cross
+    runs-on: ubuntu-20.04
+
+    steps:
+      - run: echo 'Build done'
+
+  utest:
+    name: actions-test-utest
+    runs-on: ubuntu-20.04
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      ################################################################
+      # Tests
+      - name: Build test image
+        run: docker build --tag srs:test -f trunk/Dockerfile.test .
+      # For utest
+      - name: Run SRS utest
+        run: docker run --rm srs:test bash -c 'make utest && ./objs/srs_utest'
+      # For regression-test
+      - name: Run SRS regression-test
+        run: docker run --rm srs:test bash -c 'make && ./objs/srs -c conf/regression-test.conf && cd 3rdparty/srs-bench && make && ./objs/srs_test -test.v'
+
+  coverage:
+    name: actions-test-coverage
+    runs-on: ubuntu-20.04
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      ################################################################
+      # Tests
+      - name: Build coverage image
+        run: docker build --tag srs:cov -f trunk/Dockerfile.cov .
+      # For coverage
+      - name: Run SRS covergae
+        if: ${{ startsWith(github.ref, 'refs/heads/') || startsWith(github.ref, 'refs/pull/') }}
+        run: |
+          # The hash of commit.
+          SRS_SHA=${{ github.sha }}
+          # Note that the root of SRS, must contains .git, for report fixing.
+          SRS_PROJECT=/srs
+          # The github.ref is, for example, refs/heads/4.0release
+          SRS_BRANCH=$(echo ${{ github.ref }}| awk -F 'refs/heads/' '{print $2}'| awk -F '/' '{print $1}')
+          # The github.ref is, for example, refs/pull/2536/merge
+          SRS_PR=$(echo ${{ github.ref }}| awk -F 'refs/pull/' '{print $2}'| awk -F '/' '{print $1}')
+          echo "For ref=${{ github.ref }}, sha=${{ github.sha }}, SRS_BRANCH=$SRS_BRANCH, SRS_PR=$SRS_PR, SRS_SHA=$SRS_SHA, SRS_PROJECT=$SRS_PROJECT"
+          docker run --rm --env SRS_BRANCH=$SRS_BRANCH --env SRS_PR=$SRS_PR --env SRS_SHA=$SRS_SHA --env SRS_PROJECT=$SRS_PROJECT \
+            srs:cov bash -c 'make utest && ./objs/srs_utest && bash auto/codecov.sh'
+
+  done:
+    name: actions-test-done
+    needs:
+      - build
+      - utest
+      - coverage
+    runs-on: ubuntu-20.04
+
+    steps:
+      - run: echo 'All done'