Environment:

MacOS 15.6.1 / Windows 11

Qt Creator 18.0.0 

Qt 6.10 RC

Steps to reproduce:

1. Run QML media player app. 
2. Play sample video file - QTBUG-140450

Expected: The video is played at normal speed. 

Actual: When playing back HEVC or H.264 video, the playback runs at an abnormally high speed and no audio is heard.

Input #0, hevc, from '/Users/lukaszkosiorowski/Documents/Projekty/Qt/test data/special formats/sample_1280x720_surfing_with_audio.hevc':
  Duration: N/A, bitrate: N/A
  Stream #0:0: Video: hevc (Main), yuv420p(tv), 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 23.98 tbr, 1200k tbn 

Reproducibility:  100%