fix: extract full HEVC codec string

.github/workflows/ci.yml

@@ -29,8 +29,11 @@ jobs:
       CI_TEST_TYPE: ${{matrix.test-type}}
     runs-on: ${{matrix.os}}
     steps:
+    - name: Disable apparmor because it breaks Chromium headless
+      run: sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0
+
     - name: checkout code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: read node version from .nvmrc
       run: echo "NVMRC=$(cat .nvmrc)" >> $GITHUB_OUTPUT
@@ -47,7 +50,7 @@ jobs:
       run: pulseaudio -D
 
     - name: setup node
-      uses: actions/setup-node@v3
+      uses: actions/setup-node@v5
       with:
         node-version: '${{steps.nvm.outputs.NVMRC}}'
         cache: npm

lib/mp4/probe.js

@@ -353,6 +353,50 @@ getTracks = function(init) {
             // and are using the default
             track.codec = 'mp4a.40.2';
           }
+        } else if(/^h(vc|ev)1$/i.test(track.codec)) {
+          /*
+          Using just hvc1 or hev1 as codec string is not sufficient as canPlayType won't accept it.
+          It must be CODEC.PROFILE.COMPATIBILTY.LEVEL.CONSTRAINTS
+          See these for approach:
+          https://www.etsi.org/deliver/etsi_ts/103200_103299/103285/01.01.01_60/ts_103285v010101p.pdf
+          https://github.com/wader/fq/blob/ad0c6ecd1b79cea97bbb3048106ce309e0ec7ce0/format/mpeg/hevc_dcr.go#L24
+          */
+          codecConfig = codecBox.subarray(78);
+          codecConfigType = parseType$1(codecConfig.subarray(4, 8));
+
+          if (codecConfigType === 'hvcC' && codecConfig.length > 21) {
+            // These stored in one byte as int(2), int(1), int(5)
+            const profileSpaceTierIDC = codecConfig[9];
+            const generalProfileSpace = ['', 'A', 'B', 'C'][profileSpaceTierIDC >> 6];
+            const generalTierFlag = (profileSpaceTierIDC & 0x20) ? 'H' : 'L';
+            const generalProfileIDC = profileSpaceTierIDC & 0x1f;
+
+            const generalLevelIDC = codecConfig[20];
+
+            // general_profile_compatibility_flags, but in reverse bit order, in a hexadecimal representation
+            const profileCompatibility = parseInt(Array.from(codecConfig.subarray(10, 14)).map(
+                byte => byte.toString(2).padStart(8,'0')
+              ).join('').split('').reverse().join(''), 2).toString(16);
+
+            // hexadecimal representation of the general_constraint_indicator_flags.
+            // Each byte isseparated by a '.', and trailing zero bytes may be omitted.
+            const contraintsBytes = Array.from(codecConfig.subarray(14, 20)).map(
+              byte => byte.toString(16).toUpperCase().padStart(2, '0')
+            );
+
+            // Trailing zeros removed from joined string. Leave one zero byte if there
+            // are multiple, as all examples are like this
+            track.codec = [
+              track.codec,
+              generalProfileSpace + parseInt(generalProfileIDC, 2).toString(10),
+              profileCompatibility,
+              generalTierFlag + generalLevelIDC,
+              ...contraintsBytes
+            ].join('.').replace(/(\.00)+\.00$/, '');
+          } else {
+            // This is a fallback. Show a warning here?
+            track.codec = 'hvc1.1.6.L93.B0';
+          }
         } else {
           // flac, opus, etc
           track.codec = track.codec.toLowerCase();