[BUG] - Stresstest fails to load video after time

[aussiedwarf]

UE Version:
Observed in UE 5.5.1 but probably present in all versions.

Frontend Version:
Observed in UE5.5 but probably present in all versions with stresstest.

Problem component
Frontend

Description
The Infra Stresstest will stop loading video after 10-30 minutes. It will report, waiting for video. Examining webrtc-internals, it says video is being received and decoded fine. The console will report [Intervention] Blocked attempt to create a WebMediaPlayer as there are too many WebMediaPlayers already in existence. See crbug.com/1144736#c27.

Steps to Reproduce:

1. Start the signaling server
2. Start UE and connect Pixelstreaming to the SS
3. Start the stresstest
4. after 10-30 minutes, video will no longer load and each media element will say "WebRTC connected, waiting for video", and console error "[Intervention] Blocked attempt..."

Expected behavior

1. The stresstest should continue to load and display video.

Platform (please complete the following information):

• OS: Windows 10
• Chrome 131.0.6778.86

Additional context
According to this Chrome may only support up to 1,000 media elements. But setting the following before their destruction supposedly fixes the problem.

mediaElement.src = '';
mediaElement.remove();
mediaElement.srcObject = null;

[github-actions]

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