Frame rate detection is wrong in some cases with m3u8 live streams

1. 60fps Twitch live streams shows as 29.97fps. Not all streams, but some streams are reported as 29.97fps.

<img width="1366" height="768" alt="Image" src="https://github.com/user-attachments/assets/7fca3f0b-0ff7-440f-add4-e752c93404dc" />
<img width="1366" height="768" alt="Image" src="https://github.com/user-attachments/assets/4dd73a91-7dee-4768-b530-b27b78aa4e6f" />