Session Replay for Unreal Engine: see the crash before the crash
Blog post from Sentry
The Sentry SDK for Unreal Engine introduces Session Replay, a feature that records the last several seconds of gameplay and attaches the footage to crash reports, aiding in diagnosing crashes by providing visual context. This innovation addresses the challenge of understanding the cause of crashes where traditional stack traces fall short by allowing developers to see what the player experienced just before an incident. By using Unreal-native facilities for capturing gameplay, the system ensures compatibility across platforms, utilizing a hardware H.264 encoder to minimize performance impact. Profiling indicates a modest runtime overhead, with the system adding approximately 0.20 ms per frame at 4K resolution. The feature, available in Sentry Unreal SDK 1.16.0, requires enabling specific plugins for different GPU vendors and offers tunable settings for replay duration and capture quality. Developers are encouraged to try out this experimental feature and provide feedback to improve its functionality, potentially reducing the number of unresolved crash reports.
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