XiaoHongbo-Hope opened a new pull request, #10818:
URL: https://github.com/apache/paimon/pull/10818

   ### Purpose
   Reduce unnecessary video prefetch during indexed random frame reads.
   
   ### Changes
   Prefetch the target GOP instead of also fetching its preceding and following 
GOPs. The range-backed stream continues to fetch additional decoder 
dependencies on demand, including B-frame dependencies. No format or API 
changes.
   
   ### Validation
   9 focused tests passed, including real B-frame and fragmented MP4 decoding, 
imported-video training reads, and sparse range reads.
   


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