Patch that gets video working on my model

[gh33291]

I have two similar 3-camera solar wifi devices. Note sure what information would be useful. The equipment model on the one says HsAKQQCC and the firmware is HwHsAkQQCC_WIFI_BP5_QX68_20230421.

Video and audio decoding were failing, so I asked AI for a patch and it came up with this (which gets video working on both of my cameras):

        // === VIDEO HANDLER for your firmware: 0x28 + 0x29 = H.265 video ===
        if (rawType == 0x28 || rawType == 0x29)
        {
            const int headerSize = 16;
            if (full.Length <= headerSize) return false;

            byte[] payload = new byte[full.Length - headerSize];
            Array.Copy(full, headerSize, payload, 0, payload.Length);

            if (needDecrypt && payload.Length >= 16)
            {
                DecryptVideoFrame(payload, payload.Length);
            }

            bool keyFrame = IsKeyVideoFrame(rawType, outerFrameType, payload);

            if (mode == OutputMode.Rtsp)
            {
                snapshotManager.UpdateFrame(payload, frameWidth, frameheight, keyFrame, outerTimestamp);
            }

            var vFrame = new FrameData
            {
                RawType   = rawType,
                FrameId   = outerFrameId,
                FrameType = outerFrameType,
                FrameRate = outerFrameRate,
                Timestamp = outerTimestamp,
                Codec     = VideoCodec.H265,
                Payload   = payload
            };

            if (mode == OutputMode.Video)
            {
                stdout?.Write(payload, 0, payload.Length);
                stdout?.Flush();
            }
            else if (mode == OutputMode.Rtsp)
            {
                rtsp?.PushVideo(vFrame);
            }

            return true;
        }

It also identified rawType == 0x18 as AAC audio, but I don't need audio, so I just disabled that for now.