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homekit: fix annexb detection

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This commit is contained in:
Koushik Dutta
2024-04-02 15:25:32 -07:00
parent 484682257b
commit f2de58f59a
1 changed files with 19 additions and 2 deletions
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21
plugins/homekit/src/types/camera/camera-recording.ts
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@@ -67,12 +67,29 @@ async function checkMp4StartsWithKeyFrame(console: Console, mp4: Buffer) {
await timeoutPromise(1000, new Promise(resolve => cp.on('exit', resolve)));
const h264 = Buffer.concat(buffers);
let offset = 0;
let countedZeroes = 0;
while (offset < h264.length - 6) {
if (h264.readInt32BE(offset) !== 1) {
const byte = h264[offset];
if (byte === 0) {
countedZeroes = Math.min(4, countedZeroes + 1);
offset++;
continue;
}
offset += 4;
if (countedZeroes < 2) {
countedZeroes = 0;
offset++
continue;
}
countedZeroes = 0;
if (byte !== 1) {
offset++;
continue;
}
offset++;
let naluType = h264.readUInt8(offset) & 0x1f;
if (naluType === NAL_TYPE_FU_A) {
offset++;