Documenting the differences between SDK Release 9.1.0 and 9.2.0

• Add new PTZStream commands available when using the web API

SDK 9.2.0 API diff

New PTZStream commands available when using the web API

OpResult PTZStream::ClearPreset(int32_t preset)

New MediaStream Synchronization methods

void MediaStream::SetEnableAnalyticsSync(bool enable) bool MediaStream::GetEnableAnalyticsSync() const