[Bugfix][Multimodal] PyAV video backend returns keyframes labeled as targets#42586

Isotr0py merged 4 commits into

vllm-project:mainvllm-project/vllm:mainfrom

WindChimeRan:fix/pyav-backend-keyframe-snapWindChimeRan/vllm:fix/pyav-backend-keyframe-snapCopy head branch name to clipboard